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static.js
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static.js
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#!/usr/bin/env node
var http = require("http")
, path = require("path")
, url = require("url")
, fs = require("fs")
, port = process.env.PORT || 8888
, ip = process.env.IP || "0.0.0.0";
function lookupMime(filename) {
var ext = /[^\/\\.]*$/.exec(filename)[0];
return {
js: "application/javascript",
ico: "image/x-icon",
css: "text/css",
svg: "image/svg+xml",
png: "image/png",
jpg: "image/jpg",
html: "text/html",
jpeg: "image/jpeg",
wasm: "application/wasm",
json: "application/json",
xml: "application/xml",
ttf: "font/ttf",
}[ext];
}
// compatibility with node 0.6
if (!fs.exists)
fs.exists = path.exists;
var allowSave = process.argv.indexOf("--allow-save") != -1;
if (allowSave)
console.warn("writing files from browser is enabled");
http.createServer(function(req, res) {
var uri = unescape(url.parse(req.url).pathname);
console.log("[" + req.method + "]", uri);
var root = process.cwd() + path.sep;
var filename = path.join(root, uri);
if (filename.slice(0, root.length) !== root) {
return error(res, 400, "400 Bad request: Directory traversal is not allowed.");
}
if (req.method == "OPTIONS") {
writeHead(res, 200);
return res.end();
}
if (req.method == "PUT") {
if (!allowSave)
return error(res, 404, "Saving not allowed (pass --allow-save to enable)");
return save(req, res, filename);
}
fs.stat(filename, function(err, stat) {
if (err)
return error(res, 404, "404 Not Found\n" + filename);
if (stat.isDirectory())
return serveDirectory(filename, uri, req, res);
var contentType = lookupMime(filename);
writeHead(res, 200, contentType);
res.setHeader("Content-Length", stat.size);
var stream = fs.createReadStream(filename, {});
req.on("close", stream.destroy.bind(stream));
stream.on("error", function(err){
if (res._header)
return req.destroy();
writeHead(res, 500, "text/plain");
res.end();
});
stream.pipe(res);
});
}).listen(port, ip);
function writeHead(res, code, contentType) {
res.setHeader("Access-Control-Allow-Origin", "file://");
res.setHeader("Access-Control-Allow-Methods", "PUT, GET, OPTIONS, HEAD");
res.setHeader("Content-Type", contentType || "text/plain");
res.statusCode = code;
}
function escapeHTML(str) {
return ("" + str).replace(/&/g, "&").replace(/"/g, """).replace(/'/g, "'").replace(/</g, "<");
}
function serveDirectory(filename, uri, req, res) {
var files = fs.readdirSync(filename);
writeHead(res, 200, "text/html");
files.push("..");
var html = files.map(function(name) {
try {
var stat = fs.statSync(filename + "/" + name);
} catch(e) {}
var index = name == "." ? 2 : name == ".." ? 3 : stat.isDirectory() ? 1 : 0;
return { name: name, index: index, size: stat.size };
}).filter(Boolean).sort(function(a, b) {
if (a.index == b.index)
return a.name.localeCompare(b.name);
return b.index - a.index;
}).map(function(stat) {
var name = stat.name;
if (stat.index) name += "/";
var size = "";
if (!stat.size) size = "";
else if (stat.size < 1024) size = stat.size + "b";
else if (stat.size < 1024 * 1024) size = (stat.size / 1024).toFixed(2) + "kb";
else size = (stat.size / 1024 / 1024).toFixed(2) + "mb";
return "<tr>"
+ "<td> " + size + " </td>"
+ "<td><a href='" + escapeHTML(name) + "'>" + escapeHTML(name) + "</a></td>"
+ "</tr>";
}).join("");
html = "<table>" + html + "</table>";
var baseUri = uri.replace(/\/?$/, "/");
html = "<base href='"+ escapeHTML(baseUri) + "'>" + html;
res._hasBody && res.write(html);
res.end();
}
function error(res, status, message, error) {
console.error(error || message);
writeHead(res, status, "text/plain");
res.write(message);
res.end();
}
function save(req, res, filePath) {
var data = "";
req.on("data", function(chunk) {
data += chunk;
});
req.on("error", function() {
error(res, 404, "Could't save file");
});
req.on("end", function() {
try {
fs.writeFileSync(filePath, data);
}
catch (e) {
return error(res, 404, "Could't save file", e);
}
writeHead(res, 200);
res.end("OK");
console.log("saved ", filePath);
});
}
function getLocalIps() {
var os = require("os");
var interfaces = os.networkInterfaces ? os.networkInterfaces() : {};
var addresses = [];
for (var k in interfaces) {
for (var k2 in interfaces[k]) {
var address = interfaces[k][k2];
if (address.family === "IPv4" && !address.internal) {
addresses.push(address.address);
}
}
}
return addresses;
}
console.log("http://" + (ip == "0.0.0.0" ? getLocalIps()[0] : ip) + ":" + port);