cyp/index.js
2020-03-17 22:02:12 +01:00

128 lines
3.2 KiB
JavaScript

const static = require("node-static");
const app = new static.Server("./app");
const port = Number(process.argv[2]) || process.env.PORT || 8080;
let tickets = [];
const cmd = "youtube-dl";
function escape(arg) {
return `'${arg.replace(/'/g, `'\\''`)}'`;
}
function searchYoutube(q, limit, response) {
response.setHeader("Content-Type", "text/plain"); // necessary for firefox to read by chunks
console.log("YouTube searching", q, limit);
q = escape(`ytsearch${limit}:${q}`);
const command = `${cmd} -j ${q} | jq "{id,title}" | jq -s .`;
require("child_process").exec(command, {}, (error, stdout, stderr) => {
if (error) {
console.log("error", error);
response.writeHead(500);
response.end(error.message);
} else {
response.end(stdout);
}
});
}
function downloadYoutube(id, response) {
response.setHeader("Content-Type", "text/plain"); // necessary for firefox to read by chunks
console.log("YouTube downloading", id);
let args = [
"-f", "bestaudio",
"-o", `${__dirname}/_youtube/%(title)s-%(id)s.%(ext)s`,
id
]
let child = require("child_process").spawn(cmd, args);
child.stdout.setEncoding("utf8").on("data", chunk => response.write(chunk));
child.stderr.setEncoding("utf8").on("data", chunk => response.write(chunk));
child.on("error", error => {
console.log(error);
response.writeHead(500);
response.end(error.message);
});
child.on("close", code => {
if (code != 0) { // fixme
}
response.end();
});
}
function handleYoutubeSearch(url, response) {
let q = url.searchParams.get("q");
let limit = url.searchParams.get("limit") || "";
if (q) {
searchYoutube(q, limit, response);
} else {
response.writeHead(404);
response.end();
}
}
function handleYoutubeDownload(request, response) {
let str = "";
request.setEncoding("utf8");
request.on("data", chunk => str += chunk);
request.on("end", () => {
let id = require("querystring").parse(str)["id"];
if (id) {
downloadYoutube(id, response);
} else {
response.writeHead(404);
response.end();
}
});
}
function handleTicket(request, response) {
request.resume().on("end", () => {
let ticket = require("crypto").randomBytes(16).toString("hex");
tickets.push(ticket);
if (tickets.length > 10) { tickets.shift(); }
let data = {ticket};
response.setHeader("Content-Type", "application/json");
response.end(JSON.stringify(data));
});
}
function onRequest(request, response) {
const url = new URL(request.url, "http://localhost");
switch (true) {
case request.method == "GET" && url.pathname == "/youtube":
return handleYoutubeSearch(url, response);
case request.method == "POST" && url.pathname == "/youtube":
return handleYoutubeDownload(request, response);
case request.method == "POST" && url.pathname == "/ticket":
return handleTicket(request, response);
default:
return request.on("end", () => app.serve(request, response)).resume();
}
}
function requestValidator(request) {
let ticket = request.resourceURL.query["ticket"];
let index = tickets.indexOf(ticket);
if (index > -1) {
tickets.splice(index, 1);
return true;
} else {
return false;
}
}
let httpServer = require("http").createServer(onRequest).listen(port);
require("ws2mpd").ws2mpd(httpServer, requestValidator);
require("ws2mpd").logging(false);