82 lines
1.8 KiB
JavaScript
82 lines
1.8 KiB
JavaScript
#!/usr/bin/env node
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const commands = require("./commands");
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function log(...args) {
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console.log(Date.now(), ...args);
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}
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function initConnection(request) {
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let ws = request.accept();
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log("ws connection accepted from origin", request.origin);
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let parts = (request.resourceURL.query.server || "").split(":");
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let host = parts[0] || "0";
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let port = Number(parts[1]) || 6600;
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log(`connecting to mpd at ${host}:${port}`);
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let mpd = new (require("net").Socket)();
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mpd.setTimeout(0);
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mpd.connect(port, host);
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let commandQueue = [];
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let command = null;
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function waitForCommand(cmd) {
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command = cmd;
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cmd.on("done", data => {
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log("ws <--", data);
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ws.send(JSON.stringify(data));
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command = null;
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processQueue();
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});
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}
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function processQueue() {
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if (command || !commandQueue.length) { return; }
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let cmd = commands.create(mpd, commandQueue.shift());
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waitForCommand(cmd);
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}
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ws.on("message", message => {
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log("ws -->", message.utf8Data);
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commandQueue.push(message.utf8Data);
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processQueue();
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});
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ws.on("close", (reasonCode, description) => {
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log(`ws ${ws.remoteAddress} disconnected`);
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mpd.end();
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});
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mpd.on("close", () => {
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log("mpd disconnected");
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ws.close();
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});
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mpd.on("error", () => {
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log("mpd connection error");
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ws.close();
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});
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waitForCommand(commands.welcome(mpd));
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}
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exports.ws2mpd = function(httpServer, originRegExp) {
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function ready() { log("ws2mpd attached to a http server", httpServer.address()); }
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(httpServer.listening ? ready() : httpServer.on("listening", ready));
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let wsServer = new (require("websocket").server)({
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httpServer,
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autoAcceptConnections: false
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});
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wsServer.on("request", request => {
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if (originRegExp && !request.origin.match(originRegExp)) {
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log("rejecting connection from origin", request.origin);
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return request.reject();
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}
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initConnection(request);
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});
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}
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