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import mime from "mime";
import ipaddr from "ipaddr.js";
import { apiSchema } from "./schema.js";
import { createProxyTunnels, createStream } from "../stream/manage.js";
export function createResponse(responseType, responseData) {
const internalError = (code) => {
return {
status: 500,
body: {
status: "error",
error: {
code: code || "error.api.fetch.critical.core",
},
critical: true
}
}
}
try {
let status = 200,
response = {};
if (responseType === "error") {
status = 400;
}
switch (responseType) {
case "error":
response = {
error: {
code: responseData?.code,
context: responseData?.context,
}
}
break;
case "redirect":
response = {
url: responseData?.url,
filename: responseData?.filename
}
break;
case "tunnel":
response = {
url: createStream(responseData),
filename: responseData?.filename
}
break;
case "local-processing":
response = {
type: responseData?.type,
service: responseData?.service,
tunnel: createProxyTunnels(responseData),
output: {
type: mime.getType(responseData?.filename) || undefined,
filename: responseData?.filename,
metadata: responseData?.fileMetadata || undefined,
subtitles: !!responseData?.subtitles || undefined,
},
audio: {
copy: responseData?.audioCopy,
format: responseData?.audioFormat,
bitrate: responseData?.audioBitrate,
cover: !!responseData?.cover || undefined,
cropCover: !!responseData?.cropCover || undefined,
},
isHLS: responseData?.isHLS,
}
if (!response.audio.format) {
if (response.type === "audio") {
// audio response without a format is invalid
return internalError();
}
delete response.audio;
}
if (!response.output.type || !response.output.filename) {
// response without a type or filename is invalid
return internalError();
}
break;
case "picker":
response = {
picker: responseData?.picker,
audio: responseData?.url,
audioFilename: responseData?.filename
}
break;
case "critical":
return internalError(responseData?.code);
default:
throw "unreachable"
}
return {
status,
body: {
status: responseType,
...response
}
}
} catch {
return internalError();
}
}
export function normalizeRequest(request) {
// TODO: remove after backwards compatibility period
if ("localProcessing" in request && typeof request.localProcessing === "boolean") {
request.localProcessing = request.localProcessing ? "preferred" : "disabled";
}
return apiSchema.safeParseAsync(request).catch(() => (
{ success: false }
));
}
export function getIP(req, prefix = 56) {
const strippedIP = req.ip.replace(/^::ffff:/, '');
const ip = ipaddr.parse(strippedIP);
if (ip.kind() === 'ipv4') {
return strippedIP;
}
const v6Bytes = ip.toByteArray();
v6Bytes.fill(0, prefix / 8);
return ipaddr.fromByteArray(v6Bytes).toString();
}
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