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.github/workflows/main.yml

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+name: goreleaser
+on:
+  # Trigger the workflow on push or pull request,
+  # but only if a semver tag is created.
+  push:
+    tags:        
+      - v*.*.*
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v1
+
+      -
+        name: Set up Go
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.14.x
+
+      - 
+        name: Set Go tools bin path
+        run: |
+          echo "::add-path::$(go env GOPATH)/bin"
+
+      - 
+        name: Login to DockerHub Registry
+        run: echo ${{ secrets.DOCKER_PASSWORD }} | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin
+
+      -
+        name: Run goreleaser
+        uses: goreleaser/goreleaser-action@v1
+        with:
+          version: latest
+          args: release --rm-dist --skip-validate
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.goreleaser.yml

@@ -0,0 +1,43 @@
+env:
+  - GO111MODULE=on
+  - CGO_ENABLED=0
+
+builds:
+  - binary: niltalk
+    main: ./
+    goos:
+      - windows
+      - darwin
+      - linux
+      - freebsd
+      - openbsd
+      - netbsd
+    goarch:
+      - amd64
+    ldflags:
+      - -s -w -X "main.buildString={{ .Tag }} ({{ .ShortCommit }} {{ .Date }})" -X "main.versionString={{ .Tag }}"
+
+    hooks:
+      # stuff executables with static assets.
+      post: make pack-bin BIN={{ .Path }}
+
+archives:
+  - format: tar.gz
+    files:
+      - README.md
+      - LICENSE
+
+dockers:
+  -
+    goos: linux
+    goarch: amd64
+    goarm: ''
+    binaries:
+    - niltalk
+    image_templates:
+    - "kailashnadh/niltalk:latest"
+    - "kailashnadh/niltalk:{{ .Tag }}"
+    skip_push: false
+    dockerfile: Dockerfile
+    extra_files:
+    - config.toml.sample

Dockerfile

@@ -0,0 +1,23 @@
+# Use an appropriate base image
+FROM golang:1.19-alpine as build
+
+# Set the working directory
+WORKDIR /app
+
+# Copy the project files
+COPY . .
+
+# Build the Niltalk binary
+RUN go build -o niltalk
+
+# Create the final image
+FROM alpine:latest
+WORKDIR /app
+COPY --from=build /app/niltalk .
+COPY config.toml.sample config.toml
+
+# Expose the necessary port
+EXPOSE 7860
+
+# Run the application
+ENTRYPOINT ["./niltalk"]

LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
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+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
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+to take away your freedom to share and change the works.  By contrast,
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+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.

Makefile

@@ -0,0 +1,51 @@
+# Try to get the commit hash from 1) git 2) the VERSION file 3) fallback.
+LAST_COMMIT := $(or $(shell git rev-parse --short HEAD 2> /dev/null),$(shell head -n 1 VERSION | grep -oP -m 1 "^[a-z0-9]+$$"),"UNKNOWN")
+
+# Try to get the semver from 1) git 2) the VERSION file 3) fallback.
+VERSION := $(or $(shell git describe --tags --abbrev=0 2> /dev/null),$(shell grep -oP "tag: \K(.*)(?=,)" VERSION),"v0.0.0")
+
+BUILDSTR := ${VERSION} (\#${LAST_COMMIT} $(shell date -u +"%Y-%m-%dT%H:%M:%S%z"))
+
+YARN ?= yarn
+GOPATH ?= $(HOME)/go
+STUFFBIN ?= $(GOPATH)/bin/stuffbin
+
+BIN := niltalk
+STATIC := static/templates static/static:/static config.toml.sample
+
+.PHONY: build
+build: $(BIN)
+
+$(STUFFBIN):
+	go install github.com/knadh/stuffbin/...
+
+$(BIN): $(shell find . -type f -name "*.go")
+	CGO_ENABLED=0 go build -o ${BIN} -ldflags="-s -w -X 'main.buildString=${BUILDSTR}' -X 'main.versionString=${VERSION}'" *.go
+
+.PHONY: run
+run:
+	CGO_ENABLED=0 go run -ldflags="-s -w -X 'main.buildString=${BUILDSTR}' -X 'main.versionString=${VERSION}'" *.go
+
+# Run Go tests.
+.PHONY: test
+test:
+	go test ./...
+
+.PHONY: dist
+dist: $(STUFFBIN) build pack-bin
+
+# pack-releases runns stuffbin packing on the given binary. This is used
+# in the .goreleaser post-build hook.
+.PHONY: pack-bin
+pack-bin: $(BIN) $(STUFFBIN)
+	$(STUFFBIN) -a stuff -in ${BIN} -out ${BIN} ${STATIC}
+
+# Use goreleaser to do a dry run producing local builds.
+.PHONY: release-dry
+release-dry:
+	goreleaser --parallelism 1 --rm-dist --snapshot --skip-validate --skip-publish
+
+# Use goreleaser to build production releases and publish them.
+.PHONY: release
+release:
+	goreleaser --parallelism 1 --rm-dist --skip-validate

README.md

@@ -1,11 +1,25 @@
----
-title: Chat Qq
-emoji: 🔥
-colorFrom: purple
-colorTo: indigo
-sdk: docker
-pinned: false
-license: mit
----
-
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# Niltalk
+
+Niltalk is a web based disposable chat server. It allows users to create
+password protected disposable, ephemeral chatrooms and invite peers to chat rooms. Rooms can
+be disposed of at any time.
+
+![niltalk](https://user-images.githubusercontent.com/547147/78459728-9f8c3180-76d8-11ea-8c0a-9cf9bfe64341.png)
+
+## Installation
+Niltalk supports in-memory / file / Redis as the backend for persisting room and session states.
+
+### Manual
+- Download the [latest release](https://github.com/knadh/niltalk/releases) for your platform and extract the binary.
+- Run `./niltalk --new-config` to generate a sample config.toml and add your configuration.
+- Run `./niltalk` and visit http://localhost:9000.
+
+### Docker
+The official Docker image `niltalk:latest` is [available here](https://hub.docker.com/r/kailashnadh/niltalk). To try out the app, copy [docker-compose.yml](docker-compose.yml) and run `docker-compose run niltalk`.
+
+### Customisation
+The static HTML/JS/CSS assets can be customized. Copy the `static` directory from the repository, change the files, and do: `./niltalk --static-dir=/path/to/custom/static`
+
+> This is a complete rewrite of the old version that had been dead and obsolete for several years (can be found in the `old` branch). These codebases are not compatible with each other and `master` has been overwritten.
+
+Licensed under AGPL3

config.toml.sample

@@ -0,0 +1,63 @@
+[app]
+# Address to listen, use "tor" to run an hidden service.
+address = "0.0.0.0:9000"
+
+# No trailing slashes.
+root_url = "http://localhost:9000"
+
+name = "Niltalk chat"
+
+max_rooms = 1000
+max_peers_per_room = 25
+
+# Peer handle format (%s for ID) for peers who don't pick handles.
+peer_handle_format = "Peer:%s"
+
+# Length of the randomly generated room ID.
+room_id_length = 8
+
+# The number of messages and events (join / leave) etc. that has to be cached
+# in a room to send to peers when they first join.
+max_cached_messages = 100
+
+# Maximum message length in bytes.
+max_message_length = 3000
+
+# Permitted message rate (messages / interval) after which a peer is kicked.
+rate_limit_messages = 25
+rate_limit_interval = "3s"
+
+# How long will the room id persist in the db before first use?
+room_age = "24h"
+
+# Timeout in seconds for which the server will wait when sending
+# a message to a peer before closing the connection. Useful for
+# kicking out peers with slow connections.
+websocket_timeout = "3s"
+
+# Session cookie name.
+session_cookie = "niltoken"
+
+# Storage kind, one of redis|memory|fs.
+storage = "redis"
+
+# Redis cache server.
+# Rooms are cached until they expires. Messages are not cached.
+[store]
+address = "redis:6379" # Eg: 127.0.0.1:6379
+password = ""
+db = 0
+active_conns = 100
+idle_conns = 20
+timeout = "3s"
+
+prefix_room = "NIL:ROOM:%s"
+prefix_session = "NIL:SESS:ROOM:%s"
+
+# InMemory store config.
+# [store]
+# no options available.
+
+# FileSystem store config.
+# [store]
+# path = "db.json"

docker-compose.yml

@@ -0,0 +1,30 @@
+# NOTE: This docker-compose.yml is meant to be just an example guideline
+# on how you can achieve the same. It is not intented to run out of the box
+# and you must edit the below configurations to suit your needs.
+
+version: "3.7"
+
+services:
+  redis:
+    image: redis:alpine
+    networks:
+      - niltalk
+    volumes:
+      - niltalk-data
+    restart: unless-stopped
+
+  niltalk:
+    image: kailashnadh/niltalk:latest
+    ports:
+      - "9000:9000"
+    networks:
+      - niltalk
+    depends_on:
+      - redis
+    restart: unless-stopped
+
+networks:
+  niltalk:
+
+volumes:
+  niltalk-data:

go.mod

@@ -0,0 +1,17 @@
+module github.com/knadh/niltalk
+
+go 1.13
+
+require (
+	github.com/clementauger/tor-prebuilt v0.0.0-20200815153310-0d7058794224
+	github.com/cretz/bine v0.2.0
+	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/go-chi/chi v4.1.2+incompatible
+	github.com/gomodule/redigo v2.0.0+incompatible
+	github.com/gorilla/websocket v1.5.0
+	github.com/knadh/koanf v1.5.0
+	github.com/knadh/stuffbin v1.1.0
+	github.com/pelletier/go-toml v1.9.5 // indirect
+	github.com/spf13/pflag v1.0.5
+	golang.org/x/crypto v0.8.0
+)

go.sum

@@ -0,0 +1,453 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
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handlers.go

@@ -0,0 +1,339 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io/ioutil"
+	"net/http"
+
+	"github.com/go-chi/chi"
+	"github.com/gorilla/websocket"
+	"github.com/knadh/niltalk/internal/hub"
+	"golang.org/x/crypto/bcrypt"
+)
+
+const (
+	hasAuth = 1 << iota
+	hasRoom
+)
+
+type sess struct {
+	ID     string
+	Handle string
+}
+
+// reqCtx is the context injected into every request.
+type reqCtx struct {
+	app  *App
+	room *hub.Room
+	sess sess
+}
+
+// jsonResp is the envelope for all JSON API responses.
+type jsonResp struct {
+	Error *string     `json:"error"`
+	Data  interface{} `json:"data"`
+}
+
+// tplWrap is the envelope for all HTML template executions.
+type tpl struct {
+	Config *hub.Config
+	Data   tplData
+}
+
+type tplData struct {
+	Title       string
+	Description string
+	Room        interface{}
+	Auth        bool
+}
+
+type reqRoom struct {
+	Name     string `json:"name"`
+	Handle   string `json:"handle"`
+	Password string `json:"password"`
+}
+
+var upgrader = websocket.Upgrader{CheckOrigin: func(r *http.Request) bool {
+	return true
+}}
+
+// handleIndex renders the homepage.
+func handleIndex(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx = r.Context().Value("ctx").(*reqCtx)
+		app = ctx.app
+	)
+	respondHTML("index", tplData{
+		Title: app.cfg.Name,
+	}, http.StatusOK, w, app)
+}
+
+// handleRoomPage renders the chat room page.
+func handleRoomPage(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx  = r.Context().Value("ctx").(*reqCtx)
+		app  = ctx.app
+		room = ctx.room
+	)
+
+	if room == nil {
+		respondHTML("room-not-found", tplData{}, http.StatusNotFound, w, app)
+		return
+	}
+
+	out := tplData{
+		Title: room.Name,
+		Room:  room,
+	}
+	if ctx.sess.ID != "" {
+		out.Auth = true
+	}
+
+	// Disable browser caching.
+	w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
+	w.Header().Set("Pragma", "no-cache")
+	w.Header().Set("Expires", "0")
+	respondHTML("room", out, http.StatusOK, w, app)
+}
+
+// handleLogin authenticates a peer into a room.
+func handleLogin(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx  = r.Context().Value("ctx").(*reqCtx)
+		app  = ctx.app
+		room = ctx.room
+	)
+
+	if room == nil {
+		respondJSON(w, nil, errors.New("room is invalid or has expired"), http.StatusBadRequest)
+		return
+	}
+
+	var req reqRoom
+	if err := readJSONReq(r, &req); err != nil {
+		respondJSON(w, nil, errors.New("error parsing JSON request"), http.StatusBadRequest)
+		return
+	}
+
+	if req.Handle == "" {
+		h, err := hub.GenerateGUID(8)
+		if err != nil {
+			app.logger.Printf("error generating uniq handle: %v", err)
+			respondJSON(w, nil, errors.New("error generating uniq handle"), http.StatusInternalServerError)
+			return
+		}
+		req.Handle = h
+	}
+
+	// Validate password.
+	if err := bcrypt.CompareHashAndPassword(room.Password, []byte(req.Password)); err != nil {
+		respondJSON(w, nil, errors.New("incorrect password"), http.StatusForbidden)
+		return
+	}
+
+	// Register a new session for the peer in the DB.
+	sessID, err := hub.GenerateGUID(32)
+	if err != nil {
+		app.logger.Printf("error generating session ID: %v", err)
+		respondJSON(w, nil, errors.New("error generating session ID"), http.StatusInternalServerError)
+		return
+	}
+
+	if err := app.hub.Store.AddSession(sessID, req.Handle, room.ID, app.cfg.RoomAge); err != nil {
+		app.logger.Printf("error creating session: %v", err)
+		respondJSON(w, nil, errors.New("error creating session"), http.StatusInternalServerError)
+		return
+	}
+
+	// Set the session cookie.
+	ck := &http.Cookie{Name: app.cfg.SessionCookie, Value: sessID, Path: "/"}
+	http.SetCookie(w, ck)
+	respondJSON(w, true, nil, http.StatusOK)
+}
+
+// handleLogout logs out a peer.
+func handleLogout(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx  = r.Context().Value("ctx").(*reqCtx)
+		app  = ctx.app
+		room = ctx.room
+	)
+
+	if room == nil {
+		respondJSON(w, nil, errors.New("room is invalid or has expired"), http.StatusBadRequest)
+		return
+	}
+
+	if err := app.hub.Store.RemoveSession(ctx.sess.ID, room.ID); err != nil {
+		app.logger.Printf("error removing session: %v", err)
+		respondJSON(w, nil, errors.New("error removing session"), http.StatusInternalServerError)
+		return
+	}
+
+	// Delete the session cookie.
+	ck := &http.Cookie{Name: app.cfg.SessionCookie, Value: "", MaxAge: -1, Path: "/"}
+	http.SetCookie(w, ck)
+	respondJSON(w, true, nil, http.StatusOK)
+}
+
+// handleWS handles incoming connections.
+func handleWS(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx  = r.Context().Value("ctx").(*reqCtx)
+		app  = ctx.app
+		room = ctx.room
+	)
+
+	if ctx.sess.ID == "" {
+		respondJSON(w, nil, errors.New("invalid session"), http.StatusForbidden)
+		return
+	}
+
+	// Create the WS connection.
+	ws, err := upgrader.Upgrade(w, r, nil)
+	if err != nil {
+		app.logger.Printf("Websocket upgrade failed: %s: %v", r.RemoteAddr, err)
+		return
+	}
+
+	// Create a new peer instance and add to the room.
+	room.AddPeer(ctx.sess.ID, ctx.sess.Handle, ws)
+}
+
+// respondJSON responds to an HTTP request with a generic payload or an error.
+func respondJSON(w http.ResponseWriter, data interface{}, err error, statusCode int) {
+	if statusCode == 0 {
+		statusCode = http.StatusOK
+	}
+
+	w.WriteHeader(statusCode)
+	w.Header().Set("Content-Type", "application/json; charset=utf-8")
+
+	out := jsonResp{Data: data}
+	if err != nil {
+		e := err.Error()
+		out.Error = &e
+	}
+	b, err := json.Marshal(out)
+	if err != nil {
+		logger.Printf("error marshalling JSON response: %v", err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+	w.Write(b)
+}
+
+// respondHTML responds to an HTTP request with the HTML output of a given template.
+func respondHTML(tplName string, data tplData, statusCode int, w http.ResponseWriter, app *App) {
+	if statusCode > 0 {
+		w.WriteHeader(statusCode)
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	err := app.tpl.ExecuteTemplate(w, tplName, tpl{
+		Config: app.cfg,
+		Data:   data,
+	})
+	if err != nil {
+		app.logger.Printf("error rendering template %s: %s", tplName, err)
+		w.Write([]byte("error rendering template"))
+	}
+}
+
+// handleCreateRoom handles the creation of a new room.
+func handleCreateRoom(w http.ResponseWriter, r *http.Request) {
+	var (
+		ctx = r.Context().Value("ctx").(*reqCtx)
+		app = ctx.app
+	)
+
+	var req reqRoom
+	if err := readJSONReq(r, &req); err != nil {
+		respondJSON(w, nil, errors.New("error parsing JSON request"), http.StatusBadRequest)
+		return
+	}
+
+	if req.Name != "" && (len(req.Name) < 3 || len(req.Name) > 100) {
+		respondJSON(w, nil, errors.New("invalid room name (6 - 100 chars)"), http.StatusBadRequest)
+		return
+	}
+
+	if len(req.Password) < 6 || len(req.Password) > 100 {
+		respondJSON(w, nil, errors.New("invalid password (6 - 100 chars)"), http.StatusBadRequest)
+		return
+	}
+
+	// Hash the password.
+	pwdHash, err := bcrypt.GenerateFromPassword([]byte(req.Password), 8)
+	if err != nil {
+		app.logger.Printf("error hashing password: %v", err)
+		respondJSON(w, "Error hashing password", nil, http.StatusInternalServerError)
+		return
+	}
+
+	// Create and activate the new room.
+	room, err := app.hub.AddRoom(req.Name, pwdHash)
+	if err != nil {
+		respondJSON(w, nil, err, http.StatusInternalServerError)
+		return
+	}
+
+	respondJSON(w, struct {
+		ID string `json:"id"`
+	}{room.ID}, nil, http.StatusOK)
+}
+
+// wrap is a middleware that handles auth and room check for various HTTP handlers.
+// It attaches the app and room contexts to handlers.
+func wrap(next http.HandlerFunc, app *App, opts uint8) http.HandlerFunc {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		var (
+			req    = &reqCtx{app: app}
+			roomID = chi.URLParam(r, "roomID")
+		)
+
+		// Check if the request is authenticated.
+		if opts&hasAuth != 0 {
+			ck, _ := r.Cookie(app.cfg.SessionCookie)
+			if ck != nil && ck.Value != "" {
+				s, err := app.hub.Store.GetSession(ck.Value, roomID)
+				if err != nil {
+					app.logger.Printf("error checking session: %v", err)
+					respondJSON(w, nil, errors.New("error checking session"), http.StatusForbidden)
+					return
+				}
+				req.sess = sess{
+					ID:     s.ID,
+					Handle: s.Handle,
+				}
+			}
+		}
+
+		// Check if the room is valid and active.
+		if opts&hasRoom != 0 {
+			// If the room's not found, req.room will be null in the target
+			// handler. It's the handler's responsibility to throw an error,
+			// API or HTML response.
+			room, err := app.hub.ActivateRoom(roomID)
+			if err == nil {
+				req.room = room
+			}
+		}
+
+		// Attach the request context.
+		ctx := context.WithValue(r.Context(), "ctx", req)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}
+
+// readJSONReq reads the JSON body from a request and unmarshals it to the given target.
+func readJSONReq(r *http.Request, o interface{}) error {
+	defer r.Body.Close()
+	b, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		return err
+	}
+	return json.Unmarshal(b, o)
+}

internal/hub/hub.go

@@ -0,0 +1,188 @@
+package hub
+
+import (
+	"crypto/rand"
+	"errors"
+	"log"
+	"sync"
+	"time"
+
+	"github.com/knadh/niltalk/store"
+)
+
+// Types of messages sent to peers.
+const (
+	TypeTyping          = "typing"
+	TypeMessage         = "message"
+	TypePeerList        = "peer.list"
+	TypePeerInfo        = "peer.info"
+	TypePeerJoin        = "peer.join"
+	TypePeerLeave       = "peer.leave"
+	TypePeerRateLimited = "peer.ratelimited"
+	TypeRoomDispose     = "room.dispose"
+	TypeRoomFull        = "room.full"
+	TypeNotice          = "notice"
+	TypeHandle          = "handle"
+)
+
+// Config represents the app configuration.
+type Config struct {
+	Address string `koanf:"address"`
+	RootURL string `koanf:"root_url"`
+
+	Name              string        `koanf:"name"`
+	RoomIDLen         int           `koanf:"room_id_length"`
+	MaxCachedMessages int           `koanf:"max_cached_messages"`
+	MaxMessageLen     int           `koanf:"max_message_length"`
+	WSTimeout         time.Duration `koanf:"websocket_timeout"`
+	MaxMessageQueue   int           `koanf:"max_message_queue"`
+	RateLimitInterval time.Duration `koanf:"rate_limit_interval"`
+	RateLimitMessages int           `koanf:"rate_limit_messages"`
+	MaxRooms          int           `koanf:"max_rooms"`
+	MaxPeersPerRoom   int           `koanf:"max_peers_per_room"`
+	PeerHandleFormat  string        `koanf:"peer_handle_format"`
+	RoomTimeout       time.Duration `koanf:"room_timeout"`
+	RoomAge           time.Duration `koanf:"room_age"`
+	SessionCookie     string        `koanf:"session_cookie"`
+	Storage           string        `koanf:"storage"`
+}
+
+// Hub acts as the controller and container for all chat rooms.
+type Hub struct {
+	Store store.Store
+	rooms map[string]*Room
+
+	cfg *Config
+	mut sync.RWMutex
+	log *log.Logger
+}
+
+// NewHub returns a new instance of Hub.
+func NewHub(cfg *Config, store store.Store, l *log.Logger) *Hub {
+	return &Hub{
+		rooms: make(map[string]*Room),
+
+		cfg:   cfg,
+		Store: store,
+		log:   l,
+	}
+}
+
+// AddRoom creates a new room in the store, adds it to the hub, and
+// returns the room (which has to be .Run() on a goroutine then).
+func (h *Hub) AddRoom(name string, password []byte) (*Room, error) {
+	id, err := h.generateRoomID(h.cfg.RoomIDLen, 5)
+	if err != nil {
+		return nil, err
+	}
+
+	// Add the room to DB.
+	if err := h.Store.AddRoom(store.Room{ID: id,
+		Name:      name,
+		CreatedAt: time.Now(),
+		Password:  password}, h.cfg.RoomAge); err != nil {
+		h.log.Printf("error creating room in the store: %v", err)
+		return nil, errors.New("error creating room")
+	}
+
+	// Initialize the room.
+	return h.initRoom(id, name, password), nil
+}
+
+// ActivateRoom loads a room from the store into the hub if it's not already active.
+func (h *Hub) ActivateRoom(id string) (*Room, error) {
+	h.mut.RLock()
+	room, ok := h.rooms[id]
+	h.mut.RUnlock()
+	if ok {
+		return room, nil
+	}
+
+	r, err := h.Store.GetRoom(id)
+	if err != nil {
+		return nil, errors.New("room doesn't exist")
+	}
+
+	// Initialize the room.
+	return h.initRoom(r.ID, r.Name, r.Password), nil
+}
+
+// GetRoom retrives an active room from the hub.
+func (h *Hub) GetRoom(id string) *Room {
+	h.mut.Lock()
+	r, _ := h.rooms[id]
+	h.mut.Unlock()
+	return r
+}
+
+// initRoom initializes a room on the Hub.
+func (h *Hub) initRoom(id, name string, password []byte) *Room {
+	r := NewRoom(id, name, password, h)
+	h.mut.Lock()
+	h.rooms[id] = r
+	h.mut.Unlock()
+	go r.run()
+	return r
+}
+
+// getRooms returns the list of active rooms.
+func (h *Hub) getRooms() []*Room {
+	h.mut.RLock()
+	out := make([]*Room, 0, len(h.rooms))
+	for _, r := range h.rooms {
+		out = append(out, r)
+	}
+	h.mut.RUnlock()
+	return out
+}
+
+// removeRoom removes a room from the hub and the store.
+func (h *Hub) removeRoom(id string) error {
+	h.mut.Lock()
+	delete(h.rooms, id)
+	h.mut.Unlock()
+
+	err := h.Store.RemoveRoom(id)
+	if err != nil {
+		h.log.Printf("error removing room from store: %v", err)
+		return err
+	}
+	return nil
+}
+
+// generateRoomID generates a random room ID while checking the store for
+// uniqueness up to numTries times.
+func (h *Hub) generateRoomID(length, numTries int) (string, error) {
+	for i := 0; i < numTries; i++ {
+		id, err := GenerateGUID(length)
+		if err != nil {
+			h.log.Printf("error generating room ID: %v", err)
+			return "", errors.New("error generating room ID")
+		}
+
+		exists, err := h.Store.RoomExists(id)
+		if err != nil {
+			h.log.Printf("error checking room ID in store: %v", err)
+			return "", errors.New("error checking room ID")
+		}
+
+		// Got a unique ID.
+		if !exists {
+			return id, nil
+		}
+	}
+	return "", errors.New("unable to generate unique room ID")
+}
+
+// GenerateGUID generates a cryptographically random, alphanumeric string of length n.
+func GenerateGUID(n int) (string, error) {
+	const dictionary = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+	var bytes = make([]byte, n)
+	if _, err := rand.Read(bytes); err != nil {
+		return "", err
+	}
+	for k, v := range bytes {
+		bytes[k] = dictionary[v%byte(len(dictionary))]
+	}
+	return string(bytes), nil
+}

internal/hub/peer.go

@@ -0,0 +1,145 @@
+package hub
+
+import (
+	"encoding/json"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+// Peer represents an individual peer / connection into a room.
+type Peer struct {
+	// Peer's chat handle.
+	ID     string
+	Handle string
+
+	ws *websocket.Conn
+
+	// Channel for outbound messages.
+	dataQ chan []byte
+
+	// Peer's room.
+	room *Room
+
+	// Rate limiting.
+	numMessages int
+	lastMessage time.Time
+}
+
+type peerInfo struct {
+	ID     string `json:"id"`
+	Handle string `json:"handle"`
+}
+
+// newPeer returns a new instance of Peer.
+func newPeer(id, handle string, ws *websocket.Conn, room *Room) *Peer {
+	return &Peer{
+		ID:     id,
+		Handle: handle,
+		ws:     ws,
+		dataQ:  make(chan []byte, 100),
+		room:   room,
+	}
+}
+
+// RunListener is a blocking function that reads incoming messages from a peer's
+// WS connection until its dropped or there's an error. This should be invoked
+// as a goroutine.
+func (p *Peer) RunListener() {
+	p.ws.SetReadLimit(int64(p.room.hub.cfg.MaxMessageLen))
+	for {
+		_, m, err := p.ws.ReadMessage()
+		if err != nil {
+			break
+		}
+		p.processMessage(m)
+	}
+
+	// WS connection is closed.
+	p.ws.Close()
+	p.room.queuePeerReq(TypePeerLeave, p)
+}
+
+// RunWriter is a blocking function that writes messages in a peer's queue to the
+// peer's WS connection. This should be invoked as a goroutine.
+func (p *Peer) RunWriter() {
+	defer p.ws.Close()
+	for {
+		select {
+		// Wait for outgoing message to appear in the channel.
+		case message, ok := <-p.dataQ:
+			if !ok {
+				p.writeWSData(websocket.CloseMessage, []byte{})
+				return
+			}
+			if err := p.writeWSData(websocket.TextMessage, message); err != nil {
+				return
+			}
+		}
+	}
+}
+
+// SendData queues a message to be written to the peer's WS.
+func (p *Peer) SendData(b []byte) {
+	p.dataQ <- b
+}
+
+// writeWSData writes the given payload to the peer's WS connection.
+func (p *Peer) writeWSData(msgType int, payload []byte) error {
+	p.ws.SetWriteDeadline(time.Now().Add(p.room.hub.cfg.WSTimeout))
+	return p.ws.WriteMessage(msgType, payload)
+}
+
+// writeWSControl writes the given control payload to the peer's WS connection.
+func (p *Peer) writeWSControl(control int, payload []byte) error {
+	return p.ws.WriteControl(websocket.CloseMessage, payload, time.Time{})
+}
+
+// processMessage processes incoming messages from peers.
+func (p *Peer) processMessage(b []byte) {
+	var m payloadMsgWrap
+
+	if err := json.Unmarshal(b, &m); err != nil {
+		// TODO: Respond
+		return
+	}
+
+	switch m.Type {
+	// Message to the room.
+	case TypeMessage:
+		// Check rate limits and update counters.
+		now := time.Now()
+		if p.numMessages > 0 {
+			if (p.numMessages%p.room.hub.cfg.RateLimitMessages+1) >= p.room.hub.cfg.RateLimitMessages &&
+				time.Since(p.lastMessage) < p.room.hub.cfg.RateLimitInterval {
+				p.room.hub.Store.RemoveSession(p.ID, p.room.ID)
+				p.writeWSControl(websocket.CloseMessage,
+					websocket.FormatCloseMessage(websocket.CloseNormalClosure, TypePeerRateLimited))
+				p.ws.Close()
+				return
+			}
+		}
+		p.lastMessage = now
+		p.numMessages++
+
+		msg, ok := m.Data.(string)
+		if !ok {
+			// TODO: Respond
+			return
+		}
+		p.room.Broadcast(p.room.makeMessagePayload(msg, p), true)
+
+	// "Typing" status.
+	case TypeTyping:
+		p.room.Broadcast(p.room.makePeerUpdatePayload(p, TypeTyping), false)
+
+	// Request for peers list
+	case TypePeerList:
+		p.room.sendPeerList(p)
+
+	// Dipose of a room.
+	case TypeRoomDispose:
+		p.room.Dispose()
+	default:
+	}
+}

internal/hub/room.go

@@ -0,0 +1,279 @@
+package hub
+
+import (
+	"encoding/json"
+	"sync"
+	"time"
+
+	"github.com/gorilla/websocket"
+)
+
+type payloadMsgWrap struct {
+	Type      string      `json:"type"`
+	Timestamp time.Time   `json:"timestamp"`
+	Data      interface{} `json:"data"`
+}
+
+type payloadMsgPeer struct {
+	ID     string `json:"id"`
+	Handle string `json:"handle"`
+}
+
+type payloadMsgChat struct {
+	PeerID     string `json:"peer_id"`
+	PeerHandle string `json:"peer_handle"`
+	Msg        string `json:"message"`
+}
+
+// peerReq represents a peer request (join, leave etc.) that's processed
+// by a Room.
+type peerReq struct {
+	reqType string
+	peer    *Peer
+}
+
+// Room represents a chat room.
+type Room struct {
+	ID       string
+	Name     string
+	Password []byte
+	hub      *Hub
+	mut      *sync.RWMutex
+
+	lastActivity time.Time
+
+	// List of connected peers.
+	peers map[*Peer]bool
+
+	// Broadcast channel for messages.
+	broadcastQ chan []byte
+
+	// Peer related requests.
+	peerQ chan peerReq
+
+	// Dispose signal.
+	disposeSig chan bool
+	closed     bool
+
+	// Message / payload cache.
+	payloadCache [][]byte
+
+	timestamp time.Time
+}
+
+// NewRoom returns a new instance of Room.
+func NewRoom(id, name string, password []byte, h *Hub) *Room {
+	return &Room{
+		ID:           id,
+		Name:         name,
+		Password:     password,
+		hub:          h,
+		peers:        make(map[*Peer]bool, 100),
+		broadcastQ:   make(chan []byte, 100),
+		peerQ:        make(chan peerReq, 100),
+		disposeSig:   make(chan bool),
+		payloadCache: make([][]byte, 0, h.cfg.MaxCachedMessages),
+	}
+}
+
+// AddPeer adds a new peer to the room given a WS connection from an HTTP
+// handler.
+func (r *Room) AddPeer(id, handle string, ws *websocket.Conn) {
+	r.queuePeerReq(TypePeerJoin, newPeer(id, handle, ws, r))
+}
+
+// Dispose signals the room to notify all connected peer messages, and dispose
+// of itself.
+func (r *Room) Dispose() {
+	r.disposeSig <- true
+}
+
+// Broadcast broadcasts a message to all connected peers.
+func (r *Room) Broadcast(data []byte, record bool) {
+	r.broadcastQ <- data
+	if record {
+		r.recordMsgPayload(data)
+	}
+}
+
+// run is a blocking function that starts the main event loop for a room that
+// handles peer connection events and message broadcasts. This should be invoked
+// as a goroutine.
+func (r *Room) run() {
+loop:
+	for {
+		select {
+		// Dispose request.
+		case <-r.disposeSig:
+			r.hub.Store.ClearSessions(r.ID)
+			break loop
+
+		// Incoming peer request.
+		case req, ok := <-r.peerQ:
+			if !ok {
+				break loop
+			}
+
+			switch req.reqType {
+			// A new peer has joined.
+			case TypePeerJoin:
+				// Room's capacity is exchausted. Kick the peer out.
+				if len(r.peers) >= r.hub.cfg.MaxPeersPerRoom {
+					r.hub.Store.RemoveSession(req.peer.ID, r.ID)
+					req.peer.writeWSControl(websocket.CloseMessage,
+						websocket.FormatCloseMessage(websocket.CloseNormalClosure, TypeRoomFull))
+					req.peer.ws.Close()
+					continue
+				}
+
+				r.peers[req.peer] = true
+				go req.peer.RunListener()
+				go req.peer.RunWriter()
+
+				// Send the peer its info.
+				req.peer.SendData(r.makePeerUpdatePayload(req.peer, TypePeerInfo))
+
+				// Send the peer last N message.
+				if r.hub.cfg.MaxCachedMessages > 0 {
+					for _, b := range r.payloadCache {
+						req.peer.SendData(b)
+					}
+				}
+
+				// Notify all peers of the new addition.
+				r.Broadcast(r.makePeerUpdatePayload(req.peer, TypePeerJoin), true)
+				r.hub.log.Printf("%s@%s joined %s", req.peer.Handle, req.peer.ID, r.ID)
+
+			// A peer has left.
+			case TypePeerLeave:
+				r.removePeer(req.peer)
+				r.Broadcast(r.makePeerUpdatePayload(req.peer, TypePeerLeave), true)
+				r.hub.log.Printf("%s@%s left %s", req.peer.Handle, req.peer.ID, r.ID)
+
+			// A peer has requested the room's peer list.
+			case TypePeerList:
+				req.peer.SendData(r.makePeerListPayload())
+			}
+
+		// Fanout broadcast to all peers.
+		case m, ok := <-r.broadcastQ:
+			if !ok {
+				break loop
+			}
+			for p := range r.peers {
+				p.SendData(m)
+			}
+
+			// Extend the room's expiry (once every 30 seconds).
+			if time.Since(r.timestamp) > time.Duration(30)*time.Second {
+				r.timestamp = time.Now()
+				r.extendTTL()
+			}
+
+		// Kill the room after the inactivity period.
+		case <-time.After(r.hub.cfg.RoomAge):
+			break loop
+		}
+	}
+
+	r.hub.log.Printf("stopped room: %v", r.ID)
+	r.remove()
+}
+
+// extendTTL extends a room's TTL in the store.
+func (r *Room) extendTTL() {
+	r.hub.Store.ExtendRoomTTL(r.ID, r.hub.cfg.RoomAge)
+}
+
+// remove disposes a room by notifying and disconnecting all peers and
+// removing the room from the store.
+func (r *Room) remove() {
+	r.closed = true
+
+	// Close all peer WS connections.
+	for peer := range r.peers {
+		peer.writeWSControl(websocket.CloseMessage,
+			websocket.FormatCloseMessage(websocket.CloseNormalClosure, TypeRoomDispose))
+		delete(r.peers, peer)
+	}
+
+	// Close all room channels.
+	close(r.broadcastQ)
+	close(r.peerQ)
+	r.hub.removeRoom(r.ID)
+}
+
+// recordMsgPayload records message payloads (events) sent out. It maintains last
+// N messages to be sent to new users when they join.
+func (r *Room) recordMsgPayload(b []byte) {
+	if r.hub.cfg.MaxCachedMessages == 0 {
+		return
+	}
+
+	n := len(r.payloadCache)
+	if n >= r.hub.cfg.MaxCachedMessages {
+		r.payloadCache = r.payloadCache[1:]
+	}
+
+	r.payloadCache = append(r.payloadCache, b)
+}
+
+// queuePeerReq queues a peer addition / removal request to the room.
+func (r *Room) queuePeerReq(reqType string, p *Peer) {
+	if r.closed {
+		return
+	}
+	p.room.peerQ <- peerReq{reqType: reqType, peer: p}
+}
+
+// removePeer removes a peer from the room and broadcasts a message to the
+// room notifying all peers of the action.
+func (r *Room) removePeer(p *Peer) {
+	close(p.dataQ)
+	delete(r.peers, p)
+}
+
+// sendPeerList sends the peer list to the given peer.
+func (r *Room) sendPeerList(p *Peer) {
+	r.peerQ <- peerReq{reqType: TypePeerList, peer: p}
+}
+
+// makePeerListPayload prepares a message payload with the list of peers.
+func (r *Room) makePeerListPayload() []byte {
+	peers := make([]payloadMsgPeer, 0, len(r.peers))
+	for p := range r.peers {
+		peers = append(peers, payloadMsgPeer{ID: p.ID, Handle: p.Handle})
+	}
+	return r.makePayload(peers, TypePeerList)
+}
+
+// makePeerUpdatePayload prepares a message payload representing a peer
+// join / leave event.
+func (r *Room) makePeerUpdatePayload(p *Peer, peerUpdateType string) []byte {
+	d := payloadMsgPeer{
+		ID:     p.ID,
+		Handle: p.Handle,
+	}
+	return r.makePayload(d, peerUpdateType)
+}
+
+// makeMessagePayload prepares a chat message.
+func (r *Room) makeMessagePayload(msg string, p *Peer) []byte {
+	d := payloadMsgChat{
+		PeerID:     p.ID,
+		PeerHandle: p.Handle,
+		Msg:        msg,
+	}
+	return r.makePayload(d, TypeMessage)
+}
+
+// makePayload prepares a message payload.
+func (r *Room) makePayload(data interface{}, typ string) []byte {
+	m := payloadMsgWrap{
+		Timestamp: time.Now(),
+		Type:      typ,
+		Data:      data,
+	}
+	b, _ := json.Marshal(m)
+	return b
+}

main.go

@@ -0,0 +1,305 @@
+// Niltalk, April 2015
+// License AGPL3
+
+package main
+
+import (
+	"errors"
+	"fmt"
+	"html/template"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"strings"
+	"syscall"
+	"time"
+
+	"github.com/go-chi/chi"
+	"github.com/knadh/koanf"
+	"github.com/knadh/koanf/parsers/toml"
+	"github.com/knadh/koanf/providers/env"
+	"github.com/knadh/koanf/providers/file"
+	"github.com/knadh/koanf/providers/posflag"
+	"github.com/knadh/niltalk/internal/hub"
+	"github.com/knadh/niltalk/store"
+	"github.com/knadh/niltalk/store/fs"
+	"github.com/knadh/niltalk/store/mem"
+	"github.com/knadh/niltalk/store/redis"
+	"github.com/knadh/stuffbin"
+	flag "github.com/spf13/pflag"
+)
+
+var (
+	logger = log.New(os.Stdout, "", log.Ldate|log.Ltime|log.Lshortfile)
+	ko     = koanf.New(".")
+
+	// Version of the build injected at build time.
+	buildString = "unknown"
+)
+
+// App is the global app context that's passed around.
+type App struct {
+	hub    *hub.Hub
+	cfg    *hub.Config
+	tpl    *template.Template
+	fs     stuffbin.FileSystem
+	logger *log.Logger
+}
+
+func loadConfig() {
+	// Register --help handler.
+	f := flag.NewFlagSet("config", flag.ContinueOnError)
+	f.Usage = func() {
+		fmt.Println(f.FlagUsages())
+		os.Exit(0)
+	}
+	f.StringSlice("config", []string{"config.toml"},
+		"Path to one or more TOML config files to load in order")
+	f.Bool("new-config", false, "generate sample config file")
+	f.Bool("onion", false, "Show the onion URL")
+	f.String("static-dir", "", "(optional) path to directory with static files")
+	f.Bool("version", false, "Show build version")
+	f.Parse(os.Args[1:])
+
+	// Display version.
+	if ok, _ := f.GetBool("version"); ok {
+		fmt.Println(buildString)
+		os.Exit(0)
+	}
+
+	// Generate new config.
+	if ok, _ := f.GetBool("new-config"); ok {
+		if err := newConfigFile(); err != nil {
+			logger.Println(err)
+			os.Exit(1)
+		}
+		logger.Println("generated config.toml. Edit and run the app.")
+		os.Exit(0)
+	}
+
+	// Read the config files.
+	cFiles, _ := f.GetStringSlice("config")
+	for _, f := range cFiles {
+		logger.Printf("reading config: %s", f)
+		if err := ko.Load(file.Provider(f), toml.Parser()); err != nil {
+			if os.IsNotExist(err) {
+				logger.Fatal("config file not found. If there isn't one yet, run --new-config to generate one.")
+			}
+			logger.Fatalf("error loadng config from file: %v.", err)
+		}
+	}
+
+	// Merge env flags into config.
+	if err := ko.Load(env.Provider("NILTALK_", ".", func(s string) string {
+		return strings.Replace(strings.ToLower(
+			strings.TrimPrefix(s, "NILTALK_")), "__", ".", -1)
+	}), nil); err != nil {
+		logger.Printf("error loading env config: %v", err)
+	}
+
+	// Merge command line flags into config.
+	ko.Load(posflag.Provider(f, ".", ko), nil)
+}
+
+// initFS initializes the stuffbin embedded static filesystem.
+func initFS(staticDir string) stuffbin.FileSystem {
+	// Get self executable path to initialise stuffed FS.
+	exe, err := os.Executable()
+	if err != nil {
+		log.Fatalf("error getting executable path: %v", err)
+	}
+
+	// Read stuffed data from self.
+	fs, err := stuffbin.UnStuff(exe)
+	if err != nil {
+		// Binary is unstuffed or is running in dev mode.
+		// Can halt here or fall back to the local filesystem.
+		if err == stuffbin.ErrNoID {
+			// First argument is to the root to mount the files in the FileSystem
+			// and the rest of the arguments are paths to embed.
+			fs, err = stuffbin.NewLocalFS("./",
+				"./static/templates",
+				"./static/static:/static",
+				"config.toml.sample")
+			if err != nil {
+				log.Fatalf("error falling back to local filesystem: %v", err)
+			}
+		} else {
+			log.Fatalf("error reading stuffed binary: %v", err)
+		}
+	}
+
+	// Optional static directory to override files.
+	if staticDir != "" {
+		logger.Printf("loading static files from: %v", staticDir)
+		fStatic, err := stuffbin.NewLocalFS("/",
+			filepath.Join(staticDir, "/templates")+":/static/templates",
+			filepath.Join(staticDir, "/static")+":/static",
+		)
+		if err != nil {
+			logger.Fatalf("failed reading static directory: %s: %v", staticDir, err)
+		}
+		if err := fs.Merge(fStatic); err != nil {
+			logger.Fatalf("error merging static directory: %s: %v", staticDir, err)
+		}
+	}
+	return fs
+}
+
+// Catch OS interrupts and respond accordingly.
+// This is not fool proof as http keeps listening while
+// existing rooms are shut down.
+func catchInterrupts() {
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGINT, syscall.SIGTERM, syscall.SIGKILL)
+	go func() {
+		for sig := range c {
+			// Shutdown.
+			logger.Printf("shutting down: %v", sig)
+			os.Exit(0)
+		}
+	}()
+}
+
+func newConfigFile() error {
+	if _, err := os.Stat("config.toml"); !os.IsNotExist(err) {
+		return errors.New("config.toml exists. Remove it to generate a new one")
+	}
+
+	// Initialize the static file system into which all
+	// required static assets (.sql, .js files etc.) are loaded.
+	fs := initFS("")
+	b, err := fs.Read("config.toml.sample")
+	if err != nil {
+		return fmt.Errorf("error reading sample config (is binary stuffed?): %v", err)
+	}
+
+	return ioutil.WriteFile("config.toml", b, 0644)
+}
+
+func main() {
+	// Load configuration from files.
+	loadConfig()
+
+	// Initialize global app context.
+	app := &App{
+		logger: logger,
+		fs:     initFS(ko.String("static-dir")),
+	}
+	if err := ko.Unmarshal("app", &app.cfg); err != nil {
+		logger.Fatalf("error unmarshalling 'app' config: %v", err)
+	}
+
+	minTime := time.Duration(3) * time.Second
+	if app.cfg.RoomAge < minTime || app.cfg.WSTimeout < minTime {
+		logger.Fatal("app.websocket_timeout and app.roomage should be > 3s")
+	}
+
+	// Initialize store.
+	var store store.Store
+	if app.cfg.Storage == "redis" {
+		var storeCfg redis.Config
+		if err := ko.Unmarshal("store", &storeCfg); err != nil {
+			logger.Fatalf("error unmarshalling 'store' config: %v", err)
+		}
+
+		s, err := redis.New(storeCfg)
+		if err != nil {
+			log.Fatalf("error initializing store: %v", err)
+		}
+		store = s
+
+	} else if app.cfg.Storage == "memory" {
+		var storeCfg mem.Config
+		if err := ko.Unmarshal("store", &storeCfg); err != nil {
+			logger.Fatalf("error unmarshalling 'store' config: %v", err)
+		}
+
+		s, err := mem.New(storeCfg)
+		if err != nil {
+			log.Fatalf("error initializing store: %v", err)
+		}
+		store = s
+
+	} else if app.cfg.Storage == "fs" {
+		var storeCfg fs.Config
+		if err := ko.Unmarshal("store", &storeCfg); err != nil {
+			logger.Fatalf("error unmarshalling 'store' config: %v", err)
+		}
+
+		s, err := fs.New(storeCfg, logger)
+		if err != nil {
+			log.Fatalf("error initializing store: %v", err)
+		}
+		store = s
+
+	} else {
+		logger.Fatal("app.storage must be one of redis|memory|fs")
+	}
+
+	if ko.Bool("onion") {
+		pk, err := getOrCreatePK(store)
+		if err != nil {
+			logger.Fatal(err)
+		}
+		fmt.Printf("http://%v.onion\n", onionAddr(pk))
+		os.Exit(0)
+	}
+
+	app.hub = hub.NewHub(app.cfg, store, logger)
+
+	// Compile static templates.
+	tpl, err := stuffbin.ParseTemplatesGlob(nil, app.fs, "/static/templates/*.html")
+	if err != nil {
+		logger.Fatalf("error compiling templates: %v", err)
+	}
+	app.tpl = tpl
+
+	// Register HTTP routes.
+	r := chi.NewRouter()
+	r.Get("/", wrap(handleIndex, app, 0))
+	r.Get("/ws/{roomID}", wrap(handleWS, app, hasAuth|hasRoom))
+
+	// API.
+	r.Post("/api/rooms/{roomID}/login", wrap(handleLogin, app, hasRoom))
+	r.Delete("/api/rooms/{roomID}/login", wrap(handleLogout, app, hasAuth|hasRoom))
+	r.Post("/api/rooms", wrap(handleCreateRoom, app, 0))
+
+	// Views.
+	r.Get("/r/{roomID}", wrap(handleRoomPage, app, hasAuth|hasRoom))
+	r.Get("/static/*", func(w http.ResponseWriter, r *http.Request) {
+		app.fs.FileServer().ServeHTTP(w, r)
+	})
+
+	// Start the app.
+	var srv interface {
+		ListenAndServe() error
+	}
+
+	if appAddress := ko.String("app.address"); appAddress == "tor" {
+		pk, err := getOrCreatePK(store)
+		if err != nil {
+			logger.Fatalf("could not create the private key file: %v", err)
+		}
+
+		srv = &torServer{
+			PrivateKey: pk,
+			Handler:    r,
+		}
+		logger.Printf("starting server on http://%v.onion", onionAddr(pk))
+
+	} else {
+		srv = &http.Server{
+			Addr:    appAddress,
+			Handler: r,
+		}
+		logger.Printf("starting server on http://%v", appAddress)
+	}
+
+	if err := srv.ListenAndServe(); err != nil {
+		logger.Fatalf("couldn't start server: %v", err)
+	}
+}

static/static/app.js

@@ -0,0 +1,448 @@
+const linkifyExpr = /(\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[-A-Z0-9+&@#\/%=~_|])/ig;
+const notifType = {
+    notice: "notice",
+    error: "error"
+};
+const typingDebounceInterval = 3000;
+
+Vue.component("expand-link", {
+    props: ["link"],
+    data: function () {
+        return {
+            visible: false
+        }
+    },
+    methods: {
+        select(e) {
+            e.target.select();
+        }
+    },
+    template: `
+        <div class="expand-link">
+            <a href="#" v-on:click.prevent="visible = !visible">🔗</a>
+            <input v-if="visible" v-on:click="select" readonly type="text" :value="link" />
+        </div>
+    `
+});
+
+var app = new Vue({
+    el: "#app",
+    delimiters: ["{(", ")}"],
+    data: {
+        isBusy: false,
+        chatOn: false,
+        sidebarOn: true,
+        disposed: false,
+        hasSound: true,
+
+        // Global flash / notifcation properties.
+        notifTimer: null,
+        notifMessage: "",
+        notifType: "",
+
+        // New activity animation in title bar. Page title is cached on load
+        // to use in the animation.
+        newActivity: false,
+        newActivityCounter: 0,
+        pageTitle: document.title,
+
+        typingTimer: null,
+        typingPeers: new Map(),
+
+        // Form fields.
+        roomName: "",
+        handle: "",
+        password: "",
+        message: "",
+
+        // Chat data.
+        self: {},
+        messages: [],
+        peers: []
+    },
+    created: function () {
+        this.initClient();
+        this.initTimers();
+
+        if (window.hasOwnProperty("_room") && _room.auth) {
+            this.toggleChat();
+            Client.init(_room.id);
+            Client.connect();
+        }
+    },
+    computed: {
+        Client() {
+            return window.Client;
+        }
+    },
+    methods: {
+        // Handle room creation.
+        handleCreateRoom() {
+            fetch("/api/rooms", {
+                method: "post",
+                body: JSON.stringify({
+                    name: this.roomName,
+                    password: this.password
+                }),
+                headers: { "Content-Type": "application/json; charset=utf-8" }
+            })
+                .then(resp => resp.json())
+                .then(resp => {
+                    this.toggleBusy();
+                    if (resp.error) {
+                        this.notify(resp.error, notifType.error);
+                    } else {
+                        document.location.replace("/r/" + resp.data.id);
+                    }
+                })
+                .catch(err => {
+                    this.toggleBusy();
+                    this.notify(err, notifType.error);
+                });
+        },
+
+        // Login to a room.
+        handleLogin() {
+            const handle = this.handle.replace(/[^a-z0-9_\-\.@]/ig, "");
+
+            this.notify("Logging in", notifType.notice);
+            fetch("/api/rooms/" + _room.id + "/login", {
+                method: "post",
+                body: JSON.stringify({ handle: handle, password: this.password }),
+                headers: { "Content-Type": "application/json; charset=utf-8" }
+            })
+                .then(resp => resp.json())
+                .then(resp => {
+                    this.toggleBusy();
+                    if (resp.error) {
+                        this.notify(resp.error, notifType.error);
+                        // pwdField.focus();
+                        return;
+                    }
+
+                    this.clear();
+                    this.deNotify();
+                    this.toggleChat();
+                    Client.init(_room.id);
+                    Client.connect();
+                })
+                .catch(err => {
+                    this.toggleBusy();
+                    this.notify(err, notifType.error);
+                });
+        },
+
+        // Capture keypresses to send message on Enter key and to broadcast
+        // "typing" statuses.
+        handleChatKeyPress(e) {
+            if (e.keyCode == 13 && !e.shiftKey) {
+                e.preventDefault();
+                this.handleSendMessage();
+                return;
+            }
+
+            // If it's a non "text" key, ignore.
+            if (!String.fromCharCode(e.keyCode).match(/(\w|\s)/g)) {
+                return;
+            }
+
+            // Debounce and wait for N seconds before sending a typing status.
+            if (this.typingTimer) {
+                return;
+            }
+
+            // Send the 'typing' status.
+            Client.sendMessage(Client.MsgType["typing"]);
+
+            this.typingTimer = window.setTimeout(() => {
+                this.typingTimer = null;
+            }, typingDebounceInterval);
+        },
+
+        handleSendMessage() {
+            Client.sendMessage(Client.MsgType["message"], this.message);
+            this.message = "";
+            window.clearTimeout(this.typingTimer);
+            this.typingTimer = null;
+        },
+
+        handleLogout() {
+            if (!confirm("Logout?")) {
+                return;
+            }
+            fetch("/api/rooms/" + _room.id + "/login", {
+                method: "delete",
+                headers: { "Content-Type": "application/json; charset=utf-8" }
+            })
+                .then(resp => resp.json())
+                .then(resp => {
+                    this.toggleChat();
+                    document.location.reload();
+                })
+                .catch(err => {
+                    this.notify(err, notifType.error);
+                });
+        },
+
+        handleDisposeRoom() {
+            if (!confirm("Disconnect all peers and destroy this room?")) {
+                return;
+            }
+            Client.sendMessage(Client.MsgType["room.dispose"]);
+        },
+
+        // Flash notification.
+        notify(msg, typ, timeout) {
+            clearTimeout(this.notifTimer);
+            this.notifTimer = setTimeout(function () {
+                this.notifMessage = "";
+                this.notifType = "";
+            }.bind(this), timeout ? timeout : 3000);
+
+            this.notifMessage = msg;
+            if (typ) {
+                this.notifType = typ;
+            }
+        },
+
+        beep() {
+            const b = document.querySelector("#beep");
+            b.pause();
+            b.load();
+            b.play();
+        },
+
+        deNotify() {
+            clearTimeout(this.notifTimer);
+            this.notifMessage = "";
+            this.notifType = "";
+        },
+
+        hashColor(str) {
+            for (var i = 0, hash = 0; i < str.length; hash = str.charCodeAt(i++) + ((hash << 5) - hash));
+            for (var i = 0, colour = "#"; i < 3; colour += ("00" + ((hash >> i++ * 8) & 0xFF).toString(16)).slice(-2));
+            return colour;
+        },
+
+        formatDate(ts) {
+            var t = new Date(ts),
+                h = t.getHours(),
+                minutes = t.getMinutes(),
+                hours = ((h + 11) % 12 + 1);
+            return (hours < 10 ? "0" : "")
+                + hours.toString()
+                + ":"
+                + (minutes < 10 ? "0" : "")
+                + minutes.toString()
+                + " " + (h > 12 ? "PM" : "AM");
+        },
+
+        formatMessage(text) {
+            const div = document.createElement("div");
+            div.appendChild(document.createTextNode(text));
+            return div.innerHTML.replace(/\n+/ig, "<br />")
+                .replace(linkifyExpr, "<a refl='noopener noreferrer' href='$1' target='_blank'>$1</a>");
+        },
+
+        scrollToNewester() {
+            this.$nextTick().then(function () {
+                this.$refs["messages"].querySelector(".message:last-child").scrollIntoView();
+            }.bind(this));
+        },
+
+        // Toggle busy (form button) state.
+        toggleBusy() {
+            this.isRequesting = !this.isRequesting;
+        },
+
+        toggleSidebar() {
+            this.sidebarOn = !this.sidebarOn;
+        },
+
+        toggleChat() {
+            this.chatOn = !this.chatOn;
+
+            this.$nextTick().then(function () {
+                if (!this.chatOn && this.$refs["form-password"]) {
+                    this.$refs["form-password"].focus();
+                    return
+                }
+                if (this.$refs["form-message"]) {
+                    this.$refs["form-message"].focus();
+                }
+            }.bind(this));
+        },
+
+        // Clear all states.
+        clear() {
+            this.handle = "";
+            this.password = "";
+            this.password = "";
+            this.message = "";
+            this.self = {};
+            this.messages = [];
+            this.peers = [];
+        },
+
+        // WebSocket client event handlers.
+        onConnect() {
+            Client.getPeers();
+        },
+
+        onDisconnect(typ) {
+            switch (typ) {
+                case Client.MsgType["disconnect"]:
+                    this.notify("Disconnected. Retrying ...", notifType.notice);
+                    break;
+
+                case Client.MsgType["peer.ratelimited"]:
+                    this.notify("You sent too many messages", notifType.error);
+                    this.toggleChat();
+                    break;
+
+                case Client.MsgType["room.full"]:
+                    this.notify("Room is full", notifType.error);
+                    this.toggleChat();
+                    break;
+
+                case Client.MsgType["room.dispose"]:
+                    this.notify("Room diposed", notifType.error);
+                    this.toggleChat();
+                    this.disposed = true;
+                    break;
+            }
+            // window.location.reload();
+        },
+
+        onReconnecting(timeout) {
+            this.notify("Disconnected. Retrying ...", notifType.notice, timeout);
+        },
+
+        onPeerSelf(data) {
+            this.self = {
+                ...data.data,
+                avatar: this.hashColor(data.data.id)
+            };
+        },
+
+        onPeerJoinLeave(data, typ) {
+            const peer = data.data;
+            let peers = JSON.parse(JSON.stringify(this.peers));
+
+            // Add / remove the peer from the existing list.
+            if (typ === Client.MsgType["peer.join"]) {
+                peers.push(peer);
+            } else {
+                peers = peers.filter((e) => { return e.id !== peer.id; });
+            }
+            this.onPeers(peers);
+
+            // Notice in the message area;
+            peer.avatar = this.hashColor(peer.id);
+            this.messages.push({
+                type: typ,
+                peer: peer,
+                timestamp: data.timestamp
+            });
+            this.scrollToNewester();
+        },
+
+        onPeers(data) {
+            const peers = data.sort(function (a, b) {
+                if (a.handle < b.handle) {
+                    return -1;
+                } else if (a.handle > b.handle) {
+                    return 1;
+                } else {
+                    return 0;
+                }
+            });
+
+            peers.forEach(p => {
+                p.avatar = this.hashColor(p.id);
+            });
+
+            this.peers = peers;
+        },
+
+        onTyping(data) {
+            if (data.data.id === this.self.id) {
+                return;
+            }
+            this.typingPeers.set(data.data.id, { ...data.data, time: Date.now() });
+            this.$forceUpdate();
+        },
+
+        onMessage(data) {
+            // If the window isn't in focus, start the "new activity" animation
+            // in the title bar.
+            if (!document.hasFocus()) {
+                this.newActivity = true;
+                this.beep();
+            }
+
+            this.typingPeers.delete(data.data.peer_id);
+            this.messages.push({
+                type: Client.MsgType["message"],
+                timestamp: data.timestamp,
+                message: data.data.message,
+                peer: {
+                    id: data.data.peer_id,
+                    handle: data.data.peer_handle,
+                    avatar: this.hashColor(data.data.peer_id)
+                }
+            });
+            this.scrollToNewester();
+        },
+
+        // Register chat client events.
+        initClient() {
+            Client.on(Client.MsgType["connect"], this.onConnect);
+            Client.on(Client.MsgType["disconnect"], (data) => { this.onDisconnect(Client.MsgType["disconnect"]); });
+            Client.on(Client.MsgType["peer.ratelimited"], (data) => { this.onDisconnect(Client.MsgType["peer.ratelimited"]); });
+            Client.on(Client.MsgType["room.dispose"], (data) => { this.onDisconnect(Client.MsgType["room.dispose"]); });
+            Client.on(Client.MsgType["room.full"], (data) => { this.onDisconnect(Client.MsgType["room.full"]); });
+            Client.on(Client.MsgType["reconnecting"], this.onReconnecting);
+
+            Client.on(Client.MsgType["peer.info"], this.onPeerSelf);
+            Client.on(Client.MsgType["peer.list"], (data) => { this.onPeers(data.data); });
+            Client.on(Client.MsgType["peer.join"], (data) => { this.onPeerJoinLeave(data, Client.MsgType["peer.join"]); });
+            Client.on(Client.MsgType["peer.leave"], (data) => { this.onPeerJoinLeave(data, Client.MsgType["peer.leave"]); });
+            Client.on(Client.MsgType["message"], this.onMessage);
+            Client.on(Client.MsgType["typing"], this.onTyping);
+        },
+
+        initTimers() {
+            // Title bar "new activity" animation.
+            window.setInterval(() => {
+                if (!this.newActivity) {
+                    return;
+                }
+                if (this.newActivityCounter % 2 === 0) {
+                    document.title = "[•] " + this.pageTitle;
+                } else {
+                    document.title = this.pageTitle;
+                }
+                this.newActivityCounter++;
+            }, 2500);
+            window.onfocus = () => {
+                this.newActivity = false;
+                document.title = this.pageTitle;
+            };
+
+            // Sweep "typing" statuses at regular intervals.
+            window.setInterval(() => {
+                let changed = false;
+                this.typingPeers.forEach((p) => {
+                    if ((p.time + typingDebounceInterval) < Date.now()) {
+                        this.typingPeers.delete(p.id);
+                        changed = true;
+                    }
+                });
+                if (changed) {
+                    this.$forceUpdate();
+                }
+            }, typingDebounceInterval);
+        }
+    }
+});

static/static/base.css

@@ -0,0 +1,528 @@
+/*! normalize.css v3.0.1 | MIT License | git.io/normalize */
+
+/**
+ * 1. Set default font family to sans-serif.
+ * 2. Prevent iOS text size adjust after orientation change, without disabling
+ *    user zoom.
+ */
+
+html {
+  font-family: sans-serif; /* 1 */
+  -ms-text-size-adjust: 100%; /* 2 */
+  -webkit-text-size-adjust: 100%; /* 2 */
+  box-sizing: border-box;
+}
+
+*, *:before, *:after {
+  box-sizing: inherit;
+}
+
+
+/**
+ * Remove default margin.
+ */
+
+body {
+  margin: 0;
+}
+
+/* HTML5 display definitions
+   ========================================================================== */
+
+/**
+ * Correct `block` display not defined for any HTML5 element in IE 8/9.
+ * Correct `block` display not defined for `details` or `summary` in IE 10/11 and Firefox.
+ * Correct `block` display not defined for `main` in IE 11.
+ */
+
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+main,
+nav,
+section,
+summary {
+  display: block;
+}
+
+/**
+ * 1. Correct `inline-block` display not defined in IE 8/9.
+ * 2. Normalize vertical alignment of `progress` in Chrome, Firefox, and Opera.
+ */
+
+audio,
+canvas,
+progress,
+video {
+  display: inline-block; /* 1 */
+  vertical-align: baseline; /* 2 */
+}
+
+/**
+ * Prevent modern browsers from displaying `audio` without controls.
+ * Remove excess height in iOS 5 devices.
+ */
+
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+
+/**
+ * Address `[hidden]` styling not present in IE 8/9/10.
+ * Hide the `template` element in IE 8/9/11, Safari, and Firefox < 22.
+ */
+
+[hidden],
+template {
+  display: none;
+}
+
+/* Links
+   ========================================================================== */
+
+/**
+ * Remove the gray background color from active links in IE 10.
+ */
+
+a {
+  background: transparent;
+}
+
+/**
+ * Improve readability when focused and also mouse hovered in all browsers.
+ */
+
+a:active,
+a:hover {
+  outline: 0;
+}
+
+/* Text-level semantics
+   ========================================================================== */
+
+/**
+ * Address styling not present in IE 8/9/10/11, Safari, and Chrome.
+ */
+
+abbr[title] {
+  border-bottom: 1px dotted;
+}
+
+/**
+ * Address style set to `bolder` in Firefox 4+, Safari, and Chrome.
+ */
+
+b,
+strong {
+  font-weight: bold;
+}
+
+/**
+ * Address styling not present in Safari and Chrome.
+ */
+
+dfn {
+  font-style: italic;
+}
+
+/**
+ * Address variable `h1` font-size and margin within `section` and `article`
+ * contexts in Firefox 4+, Safari, and Chrome.
+ */
+
+h1 {
+  font-size: 2em;
+  margin: 0.67em 0;
+}
+
+/**
+ * Address styling not present in IE 8/9.
+ */
+
+mark {
+  background: #ff0;
+  color: #000;
+}
+
+/**
+ * Address inconsistent and variable font size in all browsers.
+ */
+
+small {
+  font-size: 80%;
+}
+
+/**
+ * Prevent `sub` and `sup` affecting `line-height` in all browsers.
+ */
+
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+
+sup {
+  top: -0.5em;
+}
+
+sub {
+  bottom: -0.25em;
+}
+
+
+/* Embedded content
+   ========================================================================== */
+
+/**
+ * Remove border when inside `a` element in IE 8/9/10.
+ */
+
+img {
+  border: 0;
+}
+
+/**
+ * Correct overflow not hidden in IE 9/10/11.
+ */
+
+svg:not(:root) {
+  overflow: hidden;
+}
+
+/* Grouping content
+   ========================================================================== */
+
+/**
+ * Address margin not present in IE 8/9 and Safari.
+ */
+
+figure {
+  margin: 1em 40px;
+}
+
+/**
+ * Address differences between Firefox and other browsers.
+ */
+
+hr {
+  -moz-box-sizing: content-box;
+  box-sizing: content-box;
+  height: 0;
+}
+
+/**
+ * Contain overflow in all browsers.
+ */
+
+pre {
+  overflow: auto;
+}
+
+/**
+ * Address odd `em`-unit font size rendering in all browsers.
+ */
+
+code,
+kbd,
+pre,
+samp {
+  font-family: monospace, monospace;
+  font-size: 1em;
+}
+
+/* Forms
+   ========================================================================== */
+
+/**
+ * Known limitation: by default, Chrome and Safari on OS X allow very limited
+ * styling of `select`, unless a `border` property is set.
+ */
+
+/**
+ * 1. Correct color not being inherited.
+ *    Known issue: affects color of disabled elements.
+ * 2. Correct font properties not being inherited.
+ * 3. Address margins set differently in Firefox 4+, Safari, and Chrome.
+ */
+
+button,
+input,
+optgroup,
+select,
+textarea {
+  color: inherit; /* 1 */
+  font: inherit; /* 2 */
+  margin: 0; /* 3 */
+}
+
+/**
+ * Address `overflow` set to `hidden` in IE 8/9/10/11.
+ */
+
+button {
+  overflow: visible;
+}
+
+/**
+ * Address inconsistent `text-transform` inheritance for `button` and `select`.
+ * All other form control elements do not inherit `text-transform` values.
+ * Correct `button` style inheritance in Firefox, IE 8/9/10/11, and Opera.
+ * Correct `select` style inheritance in Firefox.
+ */
+
+button,
+select {
+  text-transform: none;
+}
+
+/**
+ * 1. Avoid the WebKit bug in Android 4.0.* where (2) destroys native `audio`
+ *    and `video` controls.
+ * 2. Correct inability to style clickable `input` types in iOS.
+ * 3. Improve usability and consistency of cursor style between image-type
+ *    `input` and others.
+ */
+
+button,
+html input[type="button"], /* 1 */
+input[type="reset"],
+input[type="submit"] {
+  -webkit-appearance: button; /* 2 */
+  cursor: pointer; /* 3 */
+}
+
+/**
+ * Re-set default cursor for disabled elements.
+ */
+
+button[disabled],
+html input[disabled] {
+  cursor: default;
+}
+
+/**
+ * Remove inner padding and border in Firefox 4+.
+ */
+
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+  border: 0;
+  padding: 0;
+}
+
+/**
+ * Address Firefox 4+ setting `line-height` on `input` using `!important` in
+ * the UA stylesheet.
+ */
+
+input {
+  line-height: normal;
+}
+
+/**
+ * It's recommended that you don't attempt to style these elements.
+ * Firefox's implementation doesn't respect box-sizing, padding, or width.
+ *
+ * 1. Address box sizing set to `content-box` in IE 8/9/10.
+ * 2. Remove excess padding in IE 8/9/10.
+ */
+
+input[type="checkbox"],
+input[type="radio"] {
+  box-sizing: border-box; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Fix the cursor style for Chrome's increment/decrement buttons. For certain
+ * `font-size` values of the `input`, it causes the cursor style of the
+ * decrement button to change from `default` to `text`.
+ */
+
+input[type="number"]::-webkit-inner-spin-button,
+input[type="number"]::-webkit-outer-spin-button {
+  height: auto;
+}
+
+/**
+ * 1. Address `appearance` set to `searchfield` in Safari and Chrome.
+ * 2. Address `box-sizing` set to `border-box` in Safari and Chrome
+ *    (include `-moz` to future-proof).
+ */
+
+input[type="search"] {
+  -webkit-appearance: textfield; /* 1 */
+  -moz-box-sizing: content-box;
+  -webkit-box-sizing: content-box; /* 2 */
+  box-sizing: content-box;
+}
+
+/**
+ * Remove inner padding and search cancel button in Safari and Chrome on OS X.
+ * Safari (but not Chrome) clips the cancel button when the search input has
+ * padding (and `textfield` appearance).
+ */
+
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+
+/**
+ * Define consistent border, margin, and padding.
+ */
+
+fieldset {
+  border: 0;
+  margin: 0;
+  padding: 0;
+}
+
+/**
+ * 1. Correct `color` not being inherited in IE 8/9/10/11.
+ * 2. Remove padding so people aren't caught out if they zero out fieldsets.
+ */
+
+legend {
+  border: 0; /* 1 */
+  padding: 0; /* 2 */
+}
+
+/**
+ * Remove default vertical scrollbar in IE 8/9/10/11.
+ */
+
+textarea {
+  overflow: auto;
+}
+
+/**
+ * Don't inherit the `font-weight` (applied by a rule above).
+ * NOTE: the default cannot safely be changed in Chrome and Safari on OS X.
+ */
+
+optgroup {
+  font-weight: bold;
+}
+
+/* Tables
+   ========================================================================== */
+
+/**
+ * Remove most spacing between table cells.
+ */
+
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+td,
+th {
+  padding: 0;
+}
+
+
+
+
+/* _______ grid _______ */
+
+/* grid
+ * Main container for all
+ */
+.grid-1000, .grid-1200 {
+  margin: 0 auto;
+  padding: 0 0 0 1%;
+}
+  .grid-1000.no-center,
+  .grid-1200.no-center {
+    margin: 0;
+  }
+
+.grid-1200 {
+  max-width: 1220px;
+}
+
+.grid-1000 {
+  max-width: 1020px;
+}
+
+.row {
+  clear: both !important;
+  padding: 0 10px;
+  overflow: auto;
+}
+  .row-gut {
+    padding: 0 15px;
+  }
+
+
+/* grid
+ * Common columns definitions
+ */
+.col1, .col2, .col3, .col4, .col5, .col6, .col7, .col8, .col9, .col10, .col11, .col12 {
+  float: left;
+  margin: 0 3% 0 0;
+}
+
+.col1.last, .col2.last, .col3.last, .col4.last, .col5.last, .col6.last, .col7.last, .col8.last, .col9.last, .col10.last, .col11.last, .col12 {
+  margin: 0;
+}
+
+.col1 { width: 5.5%; }
+.col2 { width: 14%; }
+.col3 { width: 22.5%; }
+.col4 { width: 31%; }
+.col5 { width: 39.5%; }
+.col6 { width: 48%; }
+.col7 { width: 56.5%; }
+.col8 { width: 65%; }
+.col9 { width: 73.5%; }
+.col10 { width: 82%; }
+.col11 { width: 90.5%; }
+.col12 { width: 99%; margin: 0; }
+
+.row img {
+  max-width: 100%;
+  height: auto;
+}
+
+/* grid
+ * Disable padding left/right 10px if I'm 1024 or gibber - correct percentage math
+ */
+@media all and (min-width: 1024px) {
+  .grid-1000 {
+    max-width: 1000px;
+  }
+
+  .grid-1000 .row {
+    padding: 0;
+  }
+}
+
+/* grid
+ * Small devices
+ */
+@media all and (max-width: 768px) {
+  .row {
+  }
+
+  .col1, .col2, .col3, .col4, .col5, .col6, .col7, .col8, .col9, .col10, .col11 {
+    float: none;
+    width: 99%;
+  }
+
+  .small-no-float {
+    float: none !important;
+  }
+}
+

static/static/client.js

@@ -0,0 +1,133 @@
+var Client = new function () {
+	const MsgType = {
+		"connect": "connect",
+		"disconnect": "disconnect",
+		"reconnecting": "reconnecting",
+		"room.dispose": "room.dispose",
+		"room.full": "room.full",
+		"message": "message",
+		"typing": "typing",
+		"peer.list": "peer.list",
+		"peer.info": "peer.info",
+		"peer.join": "peer.join",
+		"peer.leave": "peer.leave",
+		"peer.ratelimited": "peer.ratelimited",
+		"notice": "notice",
+		"handle": "handle"
+	};
+	this.MsgType = MsgType;
+
+	var wsURL = null,
+		pingInterval = 5, // seconds
+		reconnectInterval = 4000;
+
+	var ws = null,
+		// event hooks
+		triggers = {},
+		ping_timer = null,
+		reconnect_timer = null,
+		peer = { id: null, handle: null };
+
+
+	// Initialize and connect the websocket.
+	this.init = function (roomID) {
+		wsURL = document.location.protocol.replace(/http(s?):/, "ws$1:") +
+			document.location.host + "/ws/" + roomID;
+	};
+
+	// Peer identification info.
+	this.peer = function () {
+		return peer;
+	}
+
+	// websocket hooks
+	this.connect = function () {
+		ws = new WebSocket(wsURL);
+		ws.onopen = function () {
+			trigger(MsgType["connect"]);
+		};
+
+		ws.onmessage = function (e) {
+			var data = {};
+			try {
+				data = JSON.parse(e.data);
+			} catch (e) {
+				return null;
+			}
+			trigger(data.type, data);
+		};
+
+		ws.onerror = function (e) {
+			ws.close();
+			ws = null;
+		};
+
+		ws.onclose = function (e) {
+			if (e.code == 1000) {
+				if (e.reason && MsgType.hasOwnProperty(e.reason)) {
+					trigger(e.reason);
+					return
+				}
+				trigger(MsgType["disconnect"]);
+			} else if (e.code != 1005) {
+				trigger(MsgType["disconnect"]);
+				attemptReconnection();
+			}
+		};
+	};
+
+	// register callbacks
+	this.on = function (typ, callback) {
+		if (!triggers.hasOwnProperty(typ)) {
+			triggers[typ] = [];
+		}
+		triggers[typ].push(callback);
+	};
+
+	// fetch peers list
+	this.getPeers = function () {
+		send({ "type": MsgType["peer.list"] });
+	};
+
+	// send a message
+	this.sendMessage = function (typ, data) {
+		send({ "type": typ, "data": data });
+	}
+
+	// ___ private
+	// send a message via the socket
+	// automatically encodes json if possible
+	function send(message, json) {
+		if (!ws || ws.readyState == ws.CLOSED || ws.readyState == ws.CLOSING) return;
+
+		try {
+			if (typeof (message) == "object") {
+				message = JSON.stringify(message);
+			}
+			ws.send(message);
+		} catch (e) {
+			console.log("error: " + e);
+		};
+	}
+
+	// trigger event callbacks
+	function trigger(typ, data) {
+		if (!triggers.hasOwnProperty(typ)) {
+			return;
+		}
+
+		for (var n = 0; n < triggers[typ].length; n++) {
+			triggers[typ][n].call(triggers[typ][n], data);
+		}
+	}
+
+	function attemptReconnection() {
+		trigger(MsgType["reconnecting"], reconnectInterval);
+		reconnect_timer = setTimeout(function () {
+			reconnect_timer = null;
+			self.connect();
+		}, reconnectInterval);
+	}
+
+	var self = this;
+};

static/static/style.css

@@ -0,0 +1,437 @@
+[v-cloak] {
+  display: none;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html,
+body {
+  margin: 0;
+  padding: 0;
+}
+
+body {
+  font-family: "Inter", "Helvetica Neue", "Segoe UI", sans-serif;
+  font-weight: 400;
+  font-size: 18px;
+  line-height: 30px;
+  color: #222;
+}
+
+/* Base styles */
+h1,
+h2,
+h3,
+h4,
+h5 {
+  font-weight: 500;
+}
+h1 {
+  font-size: 2em;
+  line-height: 1.2em;
+  margin: 0 0 30px 0;
+}
+h2,
+h3 {
+  margin: 0 0 15px 0;
+}
+fieldset {
+  margin: 0 0 15px 0;
+  padding: 0;
+  border: 0;
+}
+fieldset p {
+  margin: 15px 0 30px 0;
+}
+a {
+  text-decoration: none;
+  color: #f74600;
+}
+a:hover {
+  color: #222;
+}
+
+ul.no {
+  list-style-type: none;
+  margin: 0 0 15px 0;
+  padding: 0;
+}
+
+input,
+textarea {
+  font-family: "Inter", "Helvetica Neue", "Segoe UI", sans-serif;
+  font-size: 1.5em;
+  color: #222;
+
+  border-radius: 3px;
+  border: 1px solid #ddd;
+  box-shadow: 2px 2px 0px #ddd;
+  padding: 10px 15px;
+}
+input:focus {
+  border-color: #aaa;
+  box-shadow: 2px 2px 0px #aaa;
+}
+
+/* Dot spinner */
+.dot-spinner {
+  display: inline-block;
+}
+.dot-spinner i {
+  display: inline-block;
+  width: 6px;
+  height: 6px;
+
+  border-radius: 50%;
+  background: #777;
+  vertical-align: middle;
+}
+.dot-spinner i:first-child {
+  transform: translate(-5px);
+  animation: dot-spinner-ani2 0.5s linear infinite;
+  opacity: 0;
+}
+.dot-spinner i:nth-child(2),
+.dot-spinner i:nth-child(3) {
+  animation: dot-spinner-ani3 0.5s linear infinite;
+}
+.dot-spinner i:last-child {
+  animation: dot-spinner-ani1 0.5s linear infinite;
+}
+
+@keyframes dot-spinner-ani1 {
+  100% {
+    transform: translate(10px);
+    opacity: 0;
+  }
+}
+@keyframes dot-spinner-ani2 {
+  100% {
+    transform: translate(5px);
+    opacity: 1;
+  }
+}
+@keyframes dot-spinner-ani3 {
+  100% {
+    transform: translate(5px);
+  }
+}
+
+/* Helpers */
+.text-center {
+  text-align: center;
+}
+
+button,
+.button {
+  background: #f74600;
+  font-size: 1.5em;
+  color: #fff;
+
+  border-radius: 3px;
+  border: 1px solid #f74600;
+  padding: 10px 30px;
+  box-shadow: none;
+  cursor: pointer;
+}
+button:hover,
+.button:hover,
+button:focus,
+.button:focus {
+  border-color: #222;
+  background: #222;
+  color: #fff;
+  box-shadow: none;
+}
+button:disabled,
+.button:disabled {
+  cursor: wait;
+  background: #aaa;
+}
+
+@keyframes fadein {
+  from {
+    opacity: 0;
+  }
+  to {
+    opacity: 0.8;
+  }
+}
+
+.notification {
+  background: #eee;
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  padding: 10px 15px;
+  opacity: 0.7;
+  animation: fadein 300ms;
+  z-index: 1000;
+
+  text-transform: capitalize;
+  text-align: center;
+  font-weight: bold;
+}
+.notification.error {
+  background: #f00;
+  color: #fff;
+}
+.notification.notice {
+  background: #fffac6;
+}
+
+form .charlimited-container {
+  position: relative;
+}
+form .charlimited {
+  padding-bottom: 25px;
+}
+form .charlimit-counter {
+  font-size: 0.6em;
+  text-align: right;
+  position: absolute;
+  padding: 1px 6px;
+  bottom: 5px;
+  right: 40px;
+  color: #777;
+}
+form .help {
+  display: block;
+  font-size: 0.75em;
+  color: #777;
+}
+
+/* Expand link component */
+.expand-link {
+  display: inline-block;
+}
+.expand-link input {
+  padding: 3px;
+  border-width: 0 0 1px 0;
+  box-shadow: none;
+  font-size: 1em;
+  width: 100%;
+}
+
+/* Layout */
+#app {
+  min-height: 400px;
+}
+.container {
+  min-width: 320px;
+  max-width: 900px;
+  margin: 0 auto;
+}
+.header {
+  margin: 30px 0 30px 0;
+}
+.header .logo img {
+  width: auto;
+  max-height: 28px;
+}
+.intro {
+  text-align: center;
+  margin-bottom: 90px;
+}
+.intro .splash {
+  margin: 60px;
+}
+.faq .entry {
+  margin-bottom: 60px;
+}
+
+.footer {
+  margin: 30px 0 30px 0;
+  font-size: 0.8em;
+  text-align: center;
+}
+.footer a {
+  color: #777;
+  margin: 0 15px;
+}
+.footer a:hover {
+  color: inherit;
+}
+
+/* Chat */
+.chat {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: space-between;
+}
+.chat .messages {
+  width: 70%;
+  height: 70vh;
+  overflow-y: auto;
+  padding-right: 15px;
+}
+.chat .messages .message {
+  border-bottom: 1px solid #eee;
+  padding: 15px 0;
+}
+.chat .messages .message:hover {
+  background: #fafafa;
+}
+.chat .messages .notice {
+  color: #777;
+  text-align: center;
+}
+.chat .messages,
+.form-chat textarea {
+  font-size: 0.875em;
+  line-height: 1.5em;
+}
+.chat .messages .handle {
+  font-size: 0.95em;
+  color: #777;
+  font-weight: 500;
+}
+.chat .messages .avatar {
+  width: 12px;
+  height: 12px;
+}
+
+.chat .sidebar-handle {
+  display: inline-block;
+  position: fixed;
+  top: 15px;
+  right: 15px;
+  z-index: 100;
+  display: none;
+  cursor: pointer;
+}
+.chat .sidebar-handle .icon {
+  display: inline-block;
+  background: #eee;
+  border-radius: 100%;
+  width: 32px;
+  text-align: center;
+}
+
+/* Peer list sidebar */
+.chat .sidebar {
+  background: #fff;
+  width: 25%;
+}
+.chat .peers {
+  max-height: 95%;
+  overflow-y: auto;
+}
+.chat .meta {
+  display: flex;
+  flex-wrap: wrap;
+  margin-bottom: 5px;
+}
+.chat .meta .peer {
+  flex: 20%;
+}
+.chat .meta .timestamp {
+  flex: 20%;
+  text-align: right;
+  color: #777;
+  padding-right: 15px;
+}
+.peer .peer {
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+
+  margin-bottom: 10px;
+}
+.peer .self .handle:after {
+  content: " *";
+}
+.peer .avatar {
+  display: inline-block;
+  width: 15px;
+  height: 15px;
+  border-radius: 100%;
+}
+
+.form-chat {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+}
+.form-chat .typing {
+  background: #fff;
+  color: #777;
+  font-size: 0.775em;
+}
+.form-chat .typing .handle {
+  margin-left: 10px;
+  display: inline-block;
+}
+.form-chat fieldset {
+  position: relative;
+  margin: 0;
+}
+.form-chat textarea {
+  padding-bottom: 60px;
+  width: 100%;
+}
+.form-chat .controls {
+  position: absolute;
+  left: 15px;
+  bottom: 15px;
+  right: 15px;
+}
+.form-chat .controls .button,
+.form-chat .controls button {
+  font-size: 1em;
+  padding: 5px 30px;
+}
+.form-chat .controls .right {
+  float: right;
+}
+.form-chat .controls .right a {
+  display: inline-block;
+  margin-left: 15px;
+}
+
+@media screen and (max-width: 990px) {
+  body {
+    padding: 0 15px;
+  }
+
+  .chat .messages {
+    width: 100%;
+    height: 58vh;
+  }
+  .form-chat textarea {
+    height: 150px;
+  }
+  .chat .sidebar {
+    width: 25%;
+    position: fixed;
+    top: 0;
+    right: 0;
+    height: 84vh;
+    width: 90%;
+    box-shadow: -3px 0 3px #eee;
+    padding: 30px;
+    opacity: 0.9;
+  }
+  .chat .sidebar-handle {
+    display: block;
+  }
+  .form-chat textarea {
+    border: 0;
+    box-shadow: none;
+    border-top: 1px solid #ddd;
+  }
+}
+
+@media screen and (max-width: 500px) {
+  .header {
+    margin: 15px 0;
+  }
+  input,
+  textarea {
+    width: 100%;
+  }
+}

static/static/vue.min.js

@@ -0,0 +1,6 @@
+/*!
+ * Vue.js v2.6.11
+ * (c) 2014-2019 Evan You
+ * Released under the MIT License.
+ */
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e=e||self).Vue=t()}(this,function(){"use strict";var e=Object.freeze({});function t(e){return null==e}function n(e){return null!=e}function r(e){return!0===e}function i(e){return"string"==typeof e||"number"==typeof e||"symbol"==typeof e||"boolean"==typeof e}function o(e){return null!==e&&"object"==typeof e}var a=Object.prototype.toString;function s(e){return"[object Object]"===a.call(e)}function c(e){var t=parseFloat(String(e));return t>=0&&Math.floor(t)===t&&isFinite(e)}function u(e){return n(e)&&"function"==typeof e.then&&"function"==typeof e.catch}function l(e){return null==e?"":Array.isArray(e)||s(e)&&e.toString===a?JSON.stringify(e,null,2):String(e)}function f(e){var t=parseFloat(e);return isNaN(t)?e:t}function p(e,t){for(var n=Object.create(null),r=e.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return t?function(e){return 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static/templates/base.html

@@ -0,0 +1,48 @@
+{{ define "header" }}
+<!DOCTYPE html>
+<html lang="en">
+<head>
+	<title>{{ if .Data.Title }} {{ .Data.Title }} - Niltalk {{ else }}Niltalk &mdash; Instant disposable chat rooms{{ end }}</title>
+	<base href="{{ .Config.RootURL }}">
+	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+	<meta name="description" content="{{ .Data.Description }}" />
+	<meta name="keywords" content="instant chat, disposable chat" />
+	<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1" />
+	<meta property="og:image" content="/static/images/thumbnail.png" />
+	<link rel="shortcut icon" href="/static/images/favicon.png" type="image/x-icon" />
+	<link href="https://fonts.googleapis.com/css?family=Inter:400,500&display=swap" rel="stylesheet">
+	<link href="/static/style.css" rel="stylesheet" />
+	<script>
+		{{  if .Data.Room  }}
+			window._room = {
+				id: "{{ .Data.Room.ID }}",
+				name: "{{ .Data.Room.Name }}",
+				auth: {{ .Data.Auth }}
+			};
+		{{  end  }}
+	</script>
+</head>
+<body>
+<div class="container">
+	<header class="header">
+		<div class="logo">
+			<a href="{{ .Config.RootURL }}"><img src="/static/images/logo.png" /></a>
+		</div>
+	</header>
+	<div id="app" v-cloak>
+{{  end  }}
+
+
+
+{{  define "footer"  }}
+		<div v-if="notifMessage" :class="notifType" class="notification">{( notifMessage )}</div>
+	</div><!-- app -->
+</div><!-- container -->
+
+<script src="/static/vue.min.js"></script>
+<script src="/static/client.js"></script>
+<script src="/static/app.js"></script>
+
+</body>
+</html>
+{{  end  }}

static/templates/error.html

@@ -0,0 +1,10 @@
+{{ define "error" }}
+	{{ template "header" }}
+	<div id="error" class="compact">
+		<h1>{{.ErrorTitle}}</h1>
+		{{if .ErrorDescription}}
+		{{.ErrorDescription}}
+		{{end}}
+	</div>
+	{{ template "footer" }}
+{{ end }}

static/templates/index.html

@@ -0,0 +1,55 @@
+{{define "index"}}
+{{ template "header" . }}
+	<section class="intro">
+		<div class="splash">
+			<img src="/static/images/chat.png" alt="" />
+		</div>
+
+		<div class="create">
+			<h1>Instant disposable chat rooms</h1>
+			<form v-on:submit.prevent="handleCreateRoom" method="post">
+				<fieldset :disabled="isBusy">
+					<p>
+						<input v-model="password" :autofocus="'autofocus'" name="password" type="password"
+							placeholder="Password" required minlength="6" maxlength="100" />
+					</p>
+					<p>
+						<input v-model="roomName" name="name" type="text"
+							placeholder="Room name (optional)" minlength="3" maxlength="100" />
+					</p>
+					<p>
+						<input type="submit" class="button" value="Create room" />
+					</p>
+				</fieldset>
+			</form>
+		</div>
+	</section>
+
+	<article class="faq">
+		<h2>How does it work?</h2>
+		<div class="entry">
+			<p>Create instant, password protected chat rooms without the
+			need to signup. Simply click the "Create" button, and share the unique chat URL with your peers.</p>
+
+			<p>
+				A room has a lifetime of {{ .Config.RoomAge }} before the first login.
+				Up to {{ .Config.MaxPeersPerRoom }} peers can join a room.
+				Rooms are automatically deleted after {{ .Config.RoomTimeout }} of inactivity (no messages exchanged).</p>
+			<p>
+				While in a room, any of the peers can dispose of the room with the click of a button.
+			</p>
+		</div>
+		<div class="entry">
+			<h2>Why can any connected peer dispose of a room?</h2>
+			<p>Niltalk is meant for holding short private conversations between groups of people who have mutually
+			agreed to converse. There is no concept of ownership of a room, and introducing ownership complicates
+			the otherwise simple privacy feature of instant disposal by any participant. This also means that Niltalk
+			isn't really meant for starting conversations by opening up a room to a large number of uninvited participants.</p>
+		</div>
+	</article>
+	<p class="text-center">
+		<a class="github-button" href="https://github.com/knadh/niltalk" data-size="large" data-show-count="true" aria-label="Star knadh/niltalk on GitHub">Star</a>
+	</p>
+	<script async defer src="https://buttons.github.io/buttons.js"></script>
+{{ template "footer" . }}
+{{ end }}

static/templates/room-not-found.html

@@ -0,0 +1,11 @@
+{{ define "room-not-found" }}
+	{{ template "header" . }}
+	<div id="error" class="compact">
+        <h1>Room not found</h1>
+        <p>
+            That room was not found. It may have been deleted or may have expired.
+            <a href="/">Create a new room</a>.
+        </p>
+	</div>
+	{{ template "footer" . }}
+{{ end }}

static/templates/room.html

@@ -0,0 +1,127 @@
+{{ define "room" }}
+{{ template "header" . }}
+
+<!-- Login form. -->
+<form v-if="!chatOn && !disposed" v-on:submit.prevent="handleLogin" method="post" autocomplete="off" class="form-login">
+	<fieldset>
+		<h1>
+			{{ if .Data.Room.Name }}
+			{{ .Data.Room.Name }} (#{{ .Data.Room.ID }})
+			{{ else }}
+			#{{ .Data.Room.ID }}
+			{{ end }}
+		</h1>
+		<h3>Join room</h3>
+		<p>
+			<input :autofocus="'autofocus'" v-model="password" ref="form-password" type="password" name="password" placeholder="Password"
+				required minlength="6" maxlength="100" autocomplete="off" />
+		</p>
+		<p>
+			<input v-model="handle" type="text" name="handle" placeholder="Nick name (optional)" pattern=".{3,30}"
+				maxlength="30" autocomplete="off" />
+			<span class="help">3 to 30 characters</span>
+		</p>
+		<p>
+			<input type="submit" class="button" value="Login" />
+		</p>
+	</fieldset>
+	<expand-link link="{{ .Config.RootURL }}/r/{{ .Data.Room.ID }}"></expand-link>
+</form>
+
+<!-- Chat area. -->
+<section v-if="chatOn">
+	<section class="chat">
+		<span class="sidebar-handle" v-on:click.prevent="toggleSidebar">
+			{( sidebarOn ? "&rarr;" : "&larr;" )}
+			<span class="icon">👥<sup>{( peers.length )}</sup></span>
+		</span>
+		<div class="messages" ref="messages">
+			<ul class="no peers">
+				<li v-for="m in messages" class="message">
+					<div class="wrap" v-if="m.type === Client.MsgType['message']">
+						<div class="meta">
+							<span class="peer">
+								<span class="avatar" :style="{'background-color': m.peer.avatar}"></span>
+								<span class="handle">{( m.peer.handle )}</span>
+							</span>
+							<span class="timestamp" :title="m.timestamp">{( formatDate(m.timestamp) )}</span>
+						</div>
+						<div class="content" v-html="formatMessage(m.message)"></div>
+					</div>
+					<div class="wrap notice" v-else>
+						<span class="timestamp" :title="m.timestamp">{( formatDate(m.timestamp) )}</span>
+						&mdash;
+						<span class="peer">
+							<span class="avatar" :style="{'background-color': m.peer.avatar}"></span>
+							<span class="handle">{( m.peer.handle )}</span>
+								{(m.type === Client.MsgType['peer.join'] ? "joined" : "left")}
+						</span>
+					</div>
+				</li>
+			</ul>
+		</div>
+		<div v-if="sidebarOn" class="sidebar">
+			<h2 class="title">
+				<span v-if="peers.length > 1">{( peers.length )} peers</span>
+				<span v-else>Just you</span>
+			</h2>
+			<ul class="no peers">
+				<li v-for="p in peers">
+					<span class="peer">
+						<span class="avatar" :style="{'background-color': p.avatar}"></span>
+						<span class="handle">{( p.handle )}
+							{( p.id === self.id ? "*" : "" )}</span>
+					</span>
+				</li>
+			</ul>
+		</div>
+	</section>
+	<form v-on:submit.prevent="handleSendMessage" method="post" class="form-chat">
+		<div class="container">
+			<fieldset>
+				<div v-if="typingPeers.size > 0" class="typing">
+					<span class="dot-spinner"><i></i><i></i><i></i><i></i></span>
+					<span class="handle" v-for="p in Array.from(typingPeers)">{( p[1].handle )}</span>
+				</div>
+				<textarea ref="form-message" v-on:keydown="handleChatKeyPress" v-model="message" :autofocus="'autofocus'"
+					placeholder="Message" class="charlimited" maxlength="{{ .Config.MaxMessageLen }}"></textarea>
+				<div class="controls">
+					<button type="submit" class="button">Send</button>
+
+					<div class="right">
+						<a href="" v-on:click.prevent="handleLogout" class="btn-dispose">Logout</a>
+						<a href="" v-on:click.prevent="handleDisposeRoom" class="btn-dispose">Dispose &times;</a>
+					</div>
+					<!-- <div class="sounds">
+							<input v-model="hasSound" type="checkbox" checked="true" id="chk-sounds" />
+							<label for="chk-sounds"></label>
+						</div> -->
+				</div>
+			</fieldset>
+		</div>
+		<!-- <div class="row">
+				<div class="room-url">
+					<a href="#" data-value="{{ .Config.RootURL }}/r/{{ .Data.Room.ID }}">&#9741;</a>
+				</div>
+			</div> -->
+	</form>
+</section>
+
+<div v-if="disposed">
+	<h1>Room diposed</h1>
+	<p>
+		The room was disposed of and is now unavailable. <a href="/">Create a new room</a>.
+	</p>
+</div>
+
+<audio id="beep">
+	<source src="{{ .Config.RootURL }}/static/beep.ogg" type="audio/ogg">
+	<source src="{{ .Config.RootURL }}/static/beep.mp3" type="audio/mpeg">
+</audio>
+
+<!-- <div class="reconnect">
+		<h1>Disconnected.</h1>
+	</div> -->
+
+{{ template "footer" . }}
+{{end}}

store/fs/fs.go

@@ -0,0 +1,288 @@
+package fs
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+	"sync"
+	"time"
+
+	"github.com/knadh/niltalk/store"
+)
+
+// Config represents the file store config structure.
+type Config struct {
+	Path string `koanf:"path"`
+}
+
+// File represents the file implementation of the Store interface.
+type File struct {
+	cfg   *Config
+	rooms map[string]*room
+	data  map[string][]byte
+	mu    sync.Mutex
+	dirty bool
+	log   *log.Logger
+}
+
+type room struct {
+	store.Room
+	Sessions map[string]string
+	Expire   time.Time
+}
+
+// New returns a new Redis store.
+func New(cfg Config, log *log.Logger) (*File, error) {
+	store := &File{
+		cfg:   &cfg,
+		rooms: map[string]*room{},
+		data:  map[string][]byte{},
+		log:   log,
+	}
+	err := store.load()
+	go store.watch()
+	return store, err
+}
+
+// watch the store to clean it up.
+func (m *File) watch() {
+	t := time.NewTicker(time.Minute)
+	defer t.Stop()
+	for range t.C {
+		m.cleanup()
+		m.save()
+	}
+}
+
+// cleanup the store to removes expired items.
+func (m *File) cleanup() {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	now := time.Now()
+
+	for id, r := range m.rooms {
+		if r.Expire.Before(now) {
+			delete(m.rooms, id)
+			m.dirty = true
+			continue
+		}
+	}
+}
+
+// load the data from the file system.
+func (m *File) load() error {
+	if _, err := os.Stat(m.cfg.Path); os.IsExist(err) {
+		x := struct {
+			Rooms map[string]*room
+			Data  map[string][]byte
+		}{}
+		var data []byte
+		data, err = ioutil.ReadFile(m.cfg.Path)
+		if err != nil {
+			return err
+		}
+		err = json.Unmarshal(data, &x)
+		if err != nil {
+			return err
+		}
+		m.rooms = x.Rooms
+		m.data = x.Data
+	}
+	return nil
+}
+
+// save the data to the file system.
+func (m *File) save() {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if m.dirty {
+		data, err := json.Marshal(struct {
+			Rooms map[string]*room
+			Data  map[string][]byte
+		}{
+			Rooms: m.rooms,
+			Data:  m.data,
+		})
+		if err == nil {
+			m.dirty = false
+			go func() {
+				err := ioutil.WriteFile(m.cfg.Path, data, os.ModePerm)
+				if err != nil {
+					m.log.Printf("error writing file %q: %v", m.cfg.Path, err)
+				}
+			}()
+		}
+	}
+}
+
+// AddRoom adds a room to the store.
+func (m *File) AddRoom(r store.Room, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	key := r.ID
+	m.rooms[key] = &room{
+		Room:     r,
+		Expire:   r.CreatedAt.Add(ttl),
+		Sessions: map[string]string{},
+	}
+	m.dirty = true
+
+	return nil
+}
+
+// ExtendRoomTTL extends a room's TTL.
+func (m *File) ExtendRoomTTL(id string, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[id]
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Expire = room.Expire.Add(ttl)
+	m.rooms[id] = room
+	m.dirty = true
+	return nil
+}
+
+// GetRoom gets a room from the store.
+func (m *File) GetRoom(id string) (store.Room, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	out, ok := m.rooms[id]
+
+	if !ok {
+		return out.Room, store.ErrRoomNotFound
+	}
+	return out.Room, nil
+}
+
+// RoomExists checks if a room exists in the store.
+func (m *File) RoomExists(id string) (bool, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	_, ok := m.rooms[id]
+
+	return ok, nil
+}
+
+// RemoveRoom deletes a room from the store.
+func (m *File) RemoveRoom(id string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	if _, ok := m.rooms[id]; ok {
+		delete(m.rooms, id)
+		m.dirty = true
+	}
+
+	return nil
+}
+
+// AddSession adds a sessionID room to the store.
+func (m *File) AddSession(sessID, handle, roomID string, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Sessions[sessID] = handle
+	m.rooms[roomID] = room
+	m.dirty = true
+
+	return nil
+}
+
+// GetSession retrieves a peer session from the store.
+func (m *File) GetSession(sessID, roomID string) (store.Sess, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.Sess{}, store.ErrRoomNotFound
+	}
+
+	handle, ok := room.Sessions[sessID]
+
+	if !ok {
+		return store.Sess{}, nil
+	}
+
+	return store.Sess{
+		ID:     sessID,
+		Handle: handle,
+	}, nil
+}
+
+// RemoveSession deletes a session ID from a room.
+func (m *File) RemoveSession(sessID, roomID string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	if _, ok := room.Sessions[sessID]; ok {
+		delete(room.Sessions, sessID)
+		m.rooms[roomID] = room
+		m.dirty = true
+	}
+
+	return nil
+}
+
+// ClearSessions deletes all the sessions in a room.
+func (m *File) ClearSessions(roomID string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Sessions = map[string]string{}
+
+	m.rooms[roomID] = room
+	m.dirty = true
+
+	return nil
+}
+
+// Get value from a key.
+func (m *File) Get(key string) ([]byte, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	d, ok := m.data[key]
+	if !ok {
+		return nil, fmt.Errorf("key %q not found", key)
+	}
+	return d, nil
+}
+
+// Set a value.
+func (m *File) Set(key string, data []byte) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.data[key] = make([]byte, len(data), len(data))
+	copy(m.data[key], data)
+	m.dirty = true
+	return nil
+}

store/mem/mem.go

@@ -0,0 +1,218 @@
+package mem
+
+import (
+	"fmt"
+	"sync"
+	"time"
+
+	"github.com/knadh/niltalk/store"
+)
+
+// Config represents the InMemory store config structure.
+type Config struct{}
+
+// InMemory represents the in-memory implementation of the Store interface.
+type InMemory struct {
+	cfg   *Config
+	rooms map[string]*room
+	data  map[string][]byte
+	mu    sync.Mutex
+}
+
+type room struct {
+	store.Room
+	Sessions map[string]string
+	Expire   time.Time
+}
+
+// New returns a new Redis store.
+func New(cfg Config) (*InMemory, error) {
+	store := &InMemory{
+		cfg:   &cfg,
+		rooms: map[string]*room{},
+		data:  map[string][]byte{},
+	}
+	go store.watch()
+	return store, nil
+}
+
+// watch the store to clean it up.
+func (m *InMemory) watch() {
+	t := time.NewTicker(time.Minute)
+	defer t.Stop()
+	for range t.C {
+		m.cleanup()
+	}
+}
+
+// cleanup the store to removes expired items.
+func (m *InMemory) cleanup() {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	now := time.Now()
+
+	for id, r := range m.rooms {
+		if r.Expire.Before(now) {
+			delete(m.rooms, id)
+			continue
+		}
+	}
+}
+
+// AddRoom adds a room to the store.
+func (m *InMemory) AddRoom(r store.Room, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	m.rooms[r.ID] = &room{
+		Room:     r,
+		Expire:   r.CreatedAt.Add(ttl),
+		Sessions: map[string]string{},
+	}
+
+	return nil
+}
+
+// ExtendRoomTTL extends a room's TTL.
+func (m *InMemory) ExtendRoomTTL(id string, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[id]
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Expire = room.Expire.Add(ttl)
+	m.rooms[id] = room
+	return nil
+}
+
+// GetRoom gets a room from the store.
+func (m *InMemory) GetRoom(id string) (store.Room, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	out, ok := m.rooms[id]
+
+	if !ok {
+		return out.Room, store.ErrRoomNotFound
+	}
+	return out.Room, nil
+}
+
+// RoomExists checks if a room exists in the store.
+func (m *InMemory) RoomExists(id string) (bool, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	_, ok := m.rooms[id]
+
+	return ok, nil
+}
+
+// RemoveRoom deletes a room from the store.
+func (m *InMemory) RemoveRoom(id string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	delete(m.rooms, id)
+
+	return nil
+}
+
+// AddSession adds a sessionID room to the store.
+func (m *InMemory) AddSession(sessID, handle, roomID string, ttl time.Duration) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Sessions[sessID] = handle
+	m.rooms[roomID] = room
+
+	return nil
+}
+
+// GetSession retrieves a peer session from the store.
+func (m *InMemory) GetSession(sessID, roomID string) (store.Sess, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.Sess{}, store.ErrRoomNotFound
+	}
+
+	handle, ok := room.Sessions[sessID]
+
+	if !ok {
+		return store.Sess{}, nil
+	}
+
+	return store.Sess{
+		ID:     sessID,
+		Handle: handle,
+	}, nil
+}
+
+// RemoveSession deletes a session ID from a room.
+func (m *InMemory) RemoveSession(sessID, roomID string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	delete(room.Sessions, sessID)
+	m.rooms[roomID] = room
+
+	return nil
+}
+
+// ClearSessions deletes all the sessions in a room.
+func (m *InMemory) ClearSessions(roomID string) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+
+	room, ok := m.rooms[roomID]
+
+	if !ok {
+		return store.ErrRoomNotFound
+	}
+
+	room.Sessions = map[string]string{}
+
+	m.rooms[roomID] = room
+
+	return nil
+}
+
+// Get value from a key.
+func (m *InMemory) Get(key string) ([]byte, error) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	d, ok := m.data[key]
+	if !ok {
+		return nil, fmt.Errorf("key %q not found", key)
+	}
+	return d, nil
+}
+
+// Set a value.
+func (m *InMemory) Set(key string, data []byte) error {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	m.data[key] = make([]byte, len(data), len(data))
+	copy(m.data[key], data)
+	return nil
+}

store/redis/redis.go

@@ -0,0 +1,205 @@
+package redis
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/gomodule/redigo/redis"
+	"github.com/knadh/niltalk/store"
+)
+
+// Config represents the Redis store config structure.
+type Config struct {
+	Address     string        `koanf:"address"`
+	Password    string        `koanf:"password"`
+	DB          int           `koanf:"db"`
+	ActiveConns int           `koanf:"active_conns"`
+	IdleConns   int           `koanf:"idle_conns"`
+	Timeout     time.Duration `koanf:"timeout"`
+
+	PrefixRoom    string `koanf:"prefix_room"`
+	PrefixSession string `koanf:"prefix_session"`
+}
+
+// Redis represents the Redis implementation of the Store interface.
+type Redis struct {
+	cfg  *Config
+	pool *redis.Pool
+}
+
+type room struct {
+	ID        string `redis:"id"`
+	Name      string `redis:"name"`
+	Password  []byte `redis:"password"`
+	CreatedAt string `redis:"created_at"`
+}
+
+// New returns a new Redis store.
+func New(cfg Config) (*Redis, error) {
+	pool := &redis.Pool{
+		Wait:      true,
+		MaxActive: cfg.ActiveConns,
+		MaxIdle:   cfg.IdleConns,
+		Dial: func() (redis.Conn, error) {
+			return redis.Dial(
+				"tcp",
+				cfg.Address,
+				redis.DialPassword(cfg.Password),
+				redis.DialConnectTimeout(cfg.Timeout),
+				redis.DialReadTimeout(cfg.Timeout),
+				redis.DialWriteTimeout(cfg.Timeout),
+				redis.DialDatabase(cfg.DB),
+			)
+		},
+	}
+
+	// Test connection.
+	c := pool.Get()
+	defer c.Close()
+
+	if err := c.Err(); err != nil {
+		return nil, err
+	}
+	return &Redis{cfg: &cfg, pool: pool}, nil
+}
+
+// AddRoom adds a room to the store.
+func (r *Redis) AddRoom(room store.Room, ttl time.Duration) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	key := fmt.Sprintf(r.cfg.PrefixRoom, room.ID)
+	c.Send("HMSET", key,
+		"name", room.Name,
+		"created_at", room.CreatedAt.Format(time.RFC3339),
+		"password", room.Password)
+	c.Send("EXPIRE", key, int(ttl.Seconds()))
+	return c.Flush()
+}
+
+// ExtendRoomTTL extends a room's TTL.
+func (r *Redis) ExtendRoomTTL(id string, ttl time.Duration) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	c.Send("EXPIRE", fmt.Sprintf(r.cfg.PrefixRoom, id), int(ttl.Seconds()))
+	c.Send("EXPIRE", fmt.Sprintf(r.cfg.PrefixSession, id), int(ttl.Seconds()))
+	return c.Flush()
+}
+
+// GetRoom gets a room from the store.
+func (r *Redis) GetRoom(id string) (store.Room, error) {
+	c := r.pool.Get()
+	defer c.Close()
+
+	var (
+		out  store.Room
+		room room
+		key  = fmt.Sprintf(r.cfg.PrefixRoom, id)
+	)
+	res, err := redis.Values(c.Do("HGETALL", key))
+	if err != nil {
+		return out, err
+	}
+	if err := redis.ScanStruct(res, &room); err != nil {
+		return out, err
+	}
+
+	t, err := time.Parse(time.RFC3339, room.CreatedAt)
+	if err != nil {
+		return out, err
+	}
+	if t.Year() == 1 {
+		return out, store.ErrRoomNotFound
+	}
+	return store.Room{
+		ID:        id,
+		Name:      room.Name,
+		Password:  room.Password,
+		CreatedAt: t,
+	}, nil
+}
+
+// RoomExists checks if a room exists in the store.
+func (r *Redis) RoomExists(id string) (bool, error) {
+	c := r.pool.Get()
+	defer c.Close()
+
+	ok, err := redis.Bool(c.Do("EXISTS", fmt.Sprintf(r.cfg.PrefixRoom, id)))
+	if err != nil && err != redis.ErrNil {
+		return false, err
+	}
+	return ok, err
+}
+
+// RemoveRoom deletes a room from the store.
+func (r *Redis) RemoveRoom(id string) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	_, err := redis.Bool(c.Do("DEL", fmt.Sprintf(r.cfg.PrefixRoom, id)))
+	return err
+}
+
+// AddSession adds a sessionID room to the store.
+func (r *Redis) AddSession(sessID, handle, roomID string, ttl time.Duration) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	key := fmt.Sprintf(r.cfg.PrefixSession, roomID)
+	c.Send("HMSET", key, sessID, handle)
+	c.Send("EXPIRE", key, ttl.Seconds)
+	return c.Flush()
+}
+
+// GetSession retrieves a peer session from th store.
+func (r *Redis) GetSession(sessID, roomID string) (store.Sess, error) {
+	c := r.pool.Get()
+	defer c.Close()
+
+	h, err := redis.String(c.Do("HGET", fmt.Sprintf(r.cfg.PrefixSession, roomID), sessID))
+	if err != nil && err != redis.ErrNil {
+		return store.Sess{}, err
+	}
+	if h == "" {
+		return store.Sess{}, nil
+	}
+
+	return store.Sess{
+		ID:     sessID,
+		Handle: h,
+	}, nil
+}
+
+// RemoveSession deletes a session ID from a room.
+func (r *Redis) RemoveSession(sessID, roomID string) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	_, err := redis.Bool(c.Do("HDEL", fmt.Sprintf(r.cfg.PrefixSession, roomID), sessID))
+	return err
+}
+
+// ClearSessions deletes all the sessions in a room.
+func (r *Redis) ClearSessions(roomID string) error {
+	c := r.pool.Get()
+	defer c.Close()
+
+	_, err := redis.Bool(c.Do("DEL", fmt.Sprintf(r.cfg.PrefixSession, roomID)))
+	return err
+}
+
+// Get value from a key.
+func (r *Redis) Get(key string) ([]byte, error) {
+	c := r.pool.Get()
+	defer c.Close()
+	return redis.Bytes(c.Do("GET", key))
+}
+
+// Set a value.
+func (r *Redis) Set(key string, data []byte) error {
+	c := r.pool.Get()
+	defer c.Close()
+	_, err := c.Do("SET", key, data)
+	return err
+}

store/store.go

@@ -0,0 +1,40 @@
+package store
+
+import (
+	"errors"
+	"time"
+)
+
+// Store represents a backend store.
+type Store interface {
+	AddRoom(r Room, ttl time.Duration) error
+	GetRoom(id string) (Room, error)
+	ExtendRoomTTL(id string, ttl time.Duration) error
+	RoomExists(id string) (bool, error)
+	RemoveRoom(id string) error
+
+	AddSession(sessID, handle, roomID string, ttl time.Duration) error
+	GetSession(sessID, roomID string) (Sess, error)
+	RemoveSession(sessID, roomID string) error
+	ClearSessions(roomID string) error
+
+	Get(key string) ([]byte, error)
+	Set(key string, value []byte) error
+}
+
+// Room represents the properties of a room in the store.
+type Room struct {
+	ID        string    `json:"id"`
+	Name      string    `json:"name"`
+	Password  []byte    `json:"password"`
+	CreatedAt time.Time `json:"created_at"`
+}
+
+// Sess represents an authenticated peer session.
+type Sess struct {
+	ID     string `json:"id"`
+	Handle string `json:"name"`
+}
+
+// ErrRoomNotFound indicates that the requested room was not found.
+var ErrRoomNotFound = errors.New("room not found")

tor.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"context"
+	"crypto/ed25519"
+	"crypto/rand"
+	"crypto/x509"
+	"encoding/pem"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"time"
+
+	"github.com/clementauger/tor-prebuilt/embedded"
+	"github.com/cretz/bine/tor"
+	"github.com/cretz/bine/torutil"
+	tued25519 "github.com/cretz/bine/torutil/ed25519"
+	"github.com/knadh/niltalk/store"
+)
+
+func getOrCreatePK(store store.Store) (privateKey ed25519.PrivateKey, err error) {
+	key := "onionkey"
+	d, err := store.Get(key)
+	if len(d) == 0 || err != nil {
+		_, privateKey, err = ed25519.GenerateKey(rand.Reader)
+		if err != nil {
+			return nil, err
+		}
+		var x509Encoded []byte
+		x509Encoded, err = x509.MarshalPKCS8PrivateKey(privateKey)
+		if err != nil {
+			return nil, err
+		}
+		pemEncoded := pem.EncodeToMemory(&pem.Block{Type: "ED25519 PRIVATE KEY", Bytes: x509Encoded})
+		err = store.Set(key, pemEncoded)
+	} else {
+		block, _ := pem.Decode(d)
+		x509Encoded := block.Bytes
+		var tPk interface{}
+		tPk, err = x509.ParsePKCS8PrivateKey(x509Encoded)
+		if err != nil {
+			return nil, err
+		}
+		if x, ok := tPk.(ed25519.PrivateKey); ok {
+			privateKey = x
+		} else {
+			err = fmt.Errorf("invalid key type %T wanted ed25519.PrivateKey", tPk)
+		}
+	}
+	return privateKey, err
+}
+
+type torServer struct {
+	Handler http.Handler
+	// PrivateKey path to a pem encoded ed25519 private key
+	PrivateKey ed25519.PrivateKey
+}
+
+func onionAddr(pk ed25519.PrivateKey) string {
+	return torutil.OnionServiceIDFromV3PublicKey(tued25519.PublicKey([]byte(pk.Public().(ed25519.PublicKey))))
+}
+
+func (ts *torServer) ListenAndServe() error {
+
+	d, err := ioutil.TempDir("", "")
+	if err != nil {
+		return err
+	}
+
+	// Start tor with default config (can set start conf's DebugWriter to os.Stdout for debug logs)
+	// fmt.Println("Starting and registering onion service, please wait a couple of minutes...")
+	t, err := tor.Start(nil, &tor.StartConf{TempDataDirBase: d, ProcessCreator: embedded.NewCreator(), NoHush: true})
+	if err != nil {
+		return fmt.Errorf("unable to start Tor: %v", err)
+	}
+	defer t.Close()
+
+	// Wait at most a few minutes to publish the service
+	listenCtx, listenCancel := context.WithTimeout(context.Background(), 3*time.Minute)
+	defer listenCancel()
+	// Create a v3 onion service to listen on any port but show as 80
+	onion, err := t.Listen(listenCtx, &tor.ListenConf{Key: ts.PrivateKey, Version3: true, RemotePorts: []int{80}})
+	if err != nil {
+		return fmt.Errorf("unable to create onion service: %v", err)
+	}
+	defer onion.Close()
+
+	// fmt.Printf("server listening at http://%v.onion\n", onion.ID)
+
+	return http.Serve(onion, ts.Handler)
+}