diff options
Diffstat (limited to 'alias-angular/scripts/web-server.js')
| -rwxr-xr-x | alias-angular/scripts/web-server.js | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/alias-angular/scripts/web-server.js b/alias-angular/scripts/web-server.js new file mode 100755 index 0000000..1ff37b3 --- /dev/null +++ b/alias-angular/scripts/web-server.js @@ -0,0 +1,243 @@ +#!/usr/bin/env node + +var sys = require('sys'), + http = require('http'), + fs = require('fs'), + url = require('url'), + events = require('events'); + +var DEFAULT_PORT = 8000; + +function main(argv) { + new HttpServer({ + 'GET': createServlet(StaticServlet), + 'HEAD': createServlet(StaticServlet) + }).start(Number(argv[2]) || DEFAULT_PORT); +} + +function escapeHtml(value) { + return value.toString(). + replace('<', '<'). + replace('>', '>'). + replace('"', '"'); +} + +function createServlet(Class) { + var servlet = new Class(); + return servlet.handleRequest.bind(servlet); +} + +/** + * An Http server implementation that uses a map of methods to decide + * action routing. + * + * @param {Object} Map of method => Handler function + */ +function HttpServer(handlers) { + this.handlers = handlers; + this.server = http.createServer(this.handleRequest_.bind(this)); +} + +HttpServer.prototype.start = function(port) { + this.port = port; + this.server.listen(port); + sys.puts('Http Server running at http://localhost:' + port + '/'); +}; + +HttpServer.prototype.parseUrl_ = function(urlString) { + var parsed = url.parse(urlString); + parsed.pathname = url.resolve('/', parsed.pathname); + return url.parse(url.format(parsed), true); +}; + +HttpServer.prototype.handleRequest_ = function(req, res) { + var logEntry = req.method + ' ' + req.url; + if (req.headers['user-agent']) { + logEntry += ' ' + req.headers['user-agent']; + } + sys.puts(logEntry); + req.url = this.parseUrl_(req.url); + var handler = this.handlers[req.method]; + if (!handler) { + res.writeHead(501); + res.end(); + } else { + handler.call(this, req, res); + } +}; + +/** + * Handles static content. + */ +function StaticServlet() {} + +StaticServlet.MimeMap = { + 'txt': 'text/plain', + 'html': 'text/html', + 'css': 'text/css', + 'xml': 'application/xml', + 'json': 'application/json', + 'js': 'application/javascript', + 'jpg': 'image/jpeg', + 'jpeg': 'image/jpeg', + 'gif': 'image/gif', + 'png': 'image/png' +}; + +StaticServlet.prototype.handleRequest = function(req, res) { + var self = this; + var path = ('./' + req.url.pathname).replace('//','/').replace(/%(..)/, function(match, hex){ + return String.fromCharCode(parseInt(hex, 16)); + }); + var parts = path.split('/'); + if (parts[parts.length-1].charAt(0) === '.') + return self.sendForbidden_(req, res, path); + fs.stat(path, function(err, stat) { + if (err) + return self.sendMissing_(req, res, path); + if (stat.isDirectory()) + return self.sendDirectory_(req, res, path); + return self.sendFile_(req, res, path); + }); +} + +StaticServlet.prototype.sendError_ = function(req, res, error) { + res.writeHead(500, { + 'Content-Type': 'text/html' + }); + res.write('<!doctype html>\n'); + res.write('<title>Internal Server Error</title>\n'); + res.write('<h1>Internal Server Error</h1>'); + res.write('<pre>' + escapeHtml(sys.inspect(error)) + '</pre>'); + sys.puts('500 Internal Server Error'); + sys.puts(sys.inspect(error)); +}; + +StaticServlet.prototype.sendMissing_ = function(req, res, path) { + path = path.substring(1); + res.writeHead(404, { + 'Content-Type': 'text/html' + }); + res.write('<!doctype html>\n'); + res.write('<title>404 Not Found</title>\n'); + res.write('<h1>Not Found</h1>'); + res.write( + '<p>The requested URL ' + + escapeHtml(path) + + ' was not found on this server.</p>' + ); + res.end(); + sys.puts('404 Not Found: ' + path); +}; + +StaticServlet.prototype.sendForbidden_ = function(req, res, path) { + path = path.substring(1); + res.writeHead(403, { + 'Content-Type': 'text/html' + }); + res.write('<!doctype html>\n'); + res.write('<title>403 Forbidden</title>\n'); + res.write('<h1>Forbidden</h1>'); + res.write( + '<p>You do not have permission to access ' + + escapeHtml(path) + ' on this server.</p>' + ); + res.end(); + sys.puts('403 Forbidden: ' + path); +}; + +StaticServlet.prototype.sendRedirect_ = function(req, res, redirectUrl) { + res.writeHead(301, { + 'Content-Type': 'text/html', + 'Location': redirectUrl + }); + res.write('<!doctype html>\n'); + res.write('<title>301 Moved Permanently</title>\n'); + res.write('<h1>Moved Permanently</h1>'); + res.write( + '<p>The document has moved <a href="' + + redirectUrl + + '">here</a>.</p>' + ); + res.end(); + sys.puts('301 Moved Permanently: ' + redirectUrl); +}; + +StaticServlet.prototype.sendFile_ = function(req, res, path) { + var self = this; + var file = fs.createReadStream(path); + res.writeHead(200, { + 'Content-Type': StaticServlet. + MimeMap[path.split('.').pop()] || 'text/plain' + }); + if (req.method === 'HEAD') { + res.end(); + } else { + file.on('data', res.write.bind(res)); + file.on('close', function() { + res.end(); + }); + file.on('error', function(error) { + self.sendError_(req, res, error); + }); + } +}; + +StaticServlet.prototype.sendDirectory_ = function(req, res, path) { + var self = this; + if (path.match(/[^\/]$/)) { + req.url.pathname += '/'; + var redirectUrl = url.format(url.parse(url.format(req.url))); + return self.sendRedirect_(req, res, redirectUrl); + } + fs.readdir(path, function(err, files) { + if (err) + return self.sendError_(req, res, error); + + if (!files.length) + return self.writeDirectoryIndex_(req, res, path, []); + + var remaining = files.length; + files.forEach(function(fileName, index) { + fs.stat(path + '/' + fileName, function(err, stat) { + if (err) + return self.sendError_(req, res, err); + if (stat.isDirectory()) { + files[index] = fileName + '/'; + } + if (!(--remaining)) + return self.writeDirectoryIndex_(req, res, path, files); + }); + }); + }); +}; + +StaticServlet.prototype.writeDirectoryIndex_ = function(req, res, path, files) { + path = path.substring(1); + res.writeHead(200, { + 'Content-Type': 'text/html' + }); + if (req.method === 'HEAD') { + res.end(); + return; + } + res.write('<!doctype html>\n'); + res.write('<title>' + escapeHtml(path) + '</title>\n'); + res.write('<style>\n'); + res.write(' ol { list-style-type: none; font-size: 1.2em; }\n'); + res.write('</style>\n'); + res.write('<h1>Directory: ' + escapeHtml(path) + '</h1>'); + res.write('<ol>'); + files.forEach(function(fileName) { + if (fileName.charAt(0) !== '.') { + res.write('<li><a href="' + + escapeHtml(fileName) + '">' + + escapeHtml(fileName) + '</a></li>'); + } + }); + res.write('</ol>'); + res.end(); +}; + +// Must be last, +main(process.argv); |