const fs = require("fs"); const http = require("http"); const path = require("path"); var jsonUpdates = {}; const srv = http.createServer(process); srv.listen(8000); fs.watch(__dirname, trackJSONUpdates); function process(req, res) { var fileName = "." + decodeURI(req.url); if (fileName == "./") { fileName = "./index.html"; } else if (fileName == "./json.js") { const content = Object.keys(jsonUpdates).sort().join("\n"); jsonUpdates = {}; res.writeHead(200, { "Content-Type": "text/javascript" }); res.end(content, "utf-8"); return; } console.debug("fileName:", fileName); const ext = path.extname(fileName); var contentType = "text/html"; switch (ext) { case ".js": contentType = "text/javascript"; break; case "png": contentType = "image/png"; break; case "jpg": contentType = "image/jpg"; break; } fs.readFile(fileName, function(err, content) { if (err) { res.writeHead(500); res.end(err.code); return; } res.writeHead(200, { "Content-Type": contentType }); res.end(content, "utf-8"); }); } function trackJSONUpdates(eventName, fileName) { if (!fileName.endsWith("json.js")) { return; } jsonUpdates[fileName] = true; console.debug("fileName", fileName); }