98 lines
3.4 KiB
JavaScript
98 lines
3.4 KiB
JavaScript
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// Set up: npm install
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var http = require("http"),
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fs = require("fs"),
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path = require("path"),
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ws = require("ws"),
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open = require("open"),
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ProtoBuf = require("protobufjs");
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// Copy dependencies to "www/" (example specific, you usually don't have to care
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var deps = [
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["Long.min.js", "./node_modules/long/dist/Long.min.js"],
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["ByteBufferAB.min.js", "./node_modules/bytebuffer/dist/ByteBufferAB.min.js"],
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["ProtoBuf.min.js", "./node_modules/protobufjs/dist/ProtoBuf.min.js"]
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];
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for (var i=0, dep, data; i<deps.length; i++) {
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dep = deps[i];
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if (!fs.existsSync(path.join(__dirname, "www", dep[0]))) {
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console.log("Copying "+dep[0]+" from "+dep[1]);
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try {
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fs.writeFileSync(path.join(__dirname, "www", dep[0]), fs.readFileSync(path.join(__dirname, dep[1])));
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} catch (err) {
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console.log("Copying failed: "+err.message);
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console.log("\nDid you run `npm install` ?");
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process.exit(1);
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}
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}
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}
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// Initialize from .proto file
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var builder = ProtoBuf.loadProtoFile(path.join(__dirname, "www", "example.proto")),
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Message = builder.build("Message");
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// HTTP server
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var server = http.createServer(function(req, res) {
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var file = null,
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type = "text/html";
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if (req.url == "/") {
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file = "index.html";
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} else if (/^\/(\w+(?:\.min)?\.(?:js|html|proto))$/.test(req.url)) {
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file = req.url.substring(1);
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if (/\.js$/.test(file)) {
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type = "text/javascript";
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}
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}
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if (file) {
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fs.readFile(path.join(__dirname, "www", file), function(err, data) {
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if (err) {
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res.writeHead(500, {"Content-Type": type});
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res.end("Internal Server Error: "+err);
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} else {
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res.writeHead(200, {"Content-Type": type});
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res.write(data);
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res.end();
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console.log("Served www/"+file);
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}
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});
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} else {
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res.writeHead(404, {"Content-Type": "text/html"});
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res.end("Not Found");
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}
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});
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server.listen(8080);
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server.on("listening", function() {
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console.log("Server started");
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open("http://localhost:8080/");
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});
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server.on("error", function(err) {
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console.log("Failed to start server:", err);
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process.exit(1);
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});
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// WebSocket adapter
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var wss = new ws.Server({server: server});
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wss.on("connection", function(socket) {
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console.log("New WebSocket connection");
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socket.on("close", function() {
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console.log("WebSocket disconnected");
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});
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socket.on("message", function(data, flags) {
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if (flags.binary) {
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try {
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// Decode the Message
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var msg = Message.decode(data);
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console.log("Received: "+msg.text);
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// Transform the text to upper case
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msg.text = msg.text.toUpperCase();
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// Re-encode it and send it back
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socket.send(msg.toBuffer());
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console.log("Sent: "+msg.text);
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} catch (err) {
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console.log("Processing failed:", err);
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}
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} else {
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console.log("Not binary data");
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}
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});
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});
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