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package server
import (
"fmt"
"net"
"net/http"
"net/http/httputil"
"net/url"
"strings"
"github.com/dustin/go-humanize"
"github.com/felixge/httpsnoop"
"github.com/google/wire"
_ "github.com/jkuri/bore/internal/ui/landing" // landing UI
"github.com/jkuri/statik/fs"
"github.com/yhat/wsutil"
"go.uber.org/zap"
)
// ProviderSet exports for wire DI.
var ProviderSet = wire.NewSet(
NewConfig,
NewOptions,
NewBoreServer,
)
// BoreServer defines main struct for bore server and
// includes HTTP and SSH server instances.
type BoreServer struct {
opts *Options
sshServer *SSHServer
httpServer *HTTPServer
UI http.Handler
}
// NewBoreServer returns new instance of BoreServer.
func NewBoreServer(opts *Options, logger *zap.Logger) *BoreServer {
log := logger.Sugar()
landingFS, _ := fs.New()
return &BoreServer{
opts: opts,
sshServer: NewSSHServer(opts, log),
httpServer: NewHTTPServer(log),
UI: http.FileServer(&statikWrapper{landingFS}),
}
}
// Run starts the bore server.
func (s *BoreServer) Run() error {
errch := make(chan error)
go func() {
if err := s.httpServer.Run(s.opts.HTTPAddr, s.getHandler(s.handleHTTP())); err != nil {
errch <- err
}
}()
go func() {
if err := s.sshServer.Run(); err != nil {
errch <- err
}
}()
go func() {
if err := s.httpServer.Wait(); err != nil {
errch <- err
}
}()
go func() {
if err := s.sshServer.Wait(); err != nil {
errch <- err
}
}()
return <-errch
}
func (s *BoreServer) getHandler(handler http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
m := httpsnoop.CaptureMetrics(handler, w, r)
remote := r.Header.Get("X-Forwarded-For")
if remote == "" {
remote = r.RemoteAddr
}
log := fmt.Sprintf(
"%s %s (code=%d dt=%s written=%s remote=%s)",
r.Method,
r.URL,
m.Code,
m.Duration,
humanize.Bytes(uint64(m.Written)),
remote,
)
s.httpServer.logger.Debug(log)
userID := strings.Split(r.Host, ".")[0]
if client, ok := s.sshServer.clients[userID]; ok {
client.write(fmt.Sprintf("%s\n", log))
}
})
}
func (s *BoreServer) handleHTTP() http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
host, _, err := net.SplitHostPort(r.Host)
if err != nil {
host = r.Host
}
if host != s.opts.Domain {
splitted := strings.Split(host, ".")
userID := splitted[0]
if client, ok := s.sshServer.clients[userID]; ok {
w.Header().Set("X-Proxy", "bore")
if strings.ToLower(r.Header.Get("Upgrade")) == "websocket" {
url := &url.URL{Scheme: "ws", Host: fmt.Sprintf("%s:%d", client.addr, client.port)}
proxy := wsutil.NewSingleHostReverseProxy(url)
proxy.ServeHTTP(w, r)
return
}
url := &url.URL{Scheme: "http", Host: fmt.Sprintf("%s:%d", client.addr, client.port)}
proxy := httputil.NewSingleHostReverseProxy(url)
proxy.ServeHTTP(w, r)
return
}
url := &url.URL{Scheme: r.URL.Scheme, Host: s.opts.Domain, Path: "not-found", RawQuery: fmt.Sprintf("tunnelID=%s", userID)}
http.Redirect(w, r, url.String(), http.StatusMovedPermanently)
return
}
s.UI.ServeHTTP(w, r)
})
}
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