angular-seed web-script.js和cors

我已经堆积了第二天……我正试图从外部域获取一些json，但我打破了CORS。 我几乎可以肯定如何在AngularJS资源中使用JSONP ，问题出在我的node.js服务器上，它不发送

Origin: http://api.bob.com 

所以，我阅读了数以亿计的CORS谷歌答案，但所有人都说几乎一样：

 var allowCrossDomain = function(req, res, next) { res.header("Access-Control-Allow-Origin", "*"); res.header("Access-Control-Allow-Headers", "X-Requested-With"); next(); }; (...) app.use(allowCrossDomain); 

但是……在脚本\ web-script.js中没有任何类似于app的东西我可以用作app。

下面是web-script.js（它只是来自包）

 #!/usr/bin/env node var util = require('util'), 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('"', '"'); } 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); util.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']; } util.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', 'svg': 'image/svg+xml' }; StaticServlet.prototype.handleRequest = function(req, res) { var self = this; var path = ('./' + req.url.pathname).replace('//','/').replace(/%(..)/g, 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('\n'); res.write('\n'); res.write('
Internal Server Error
'); res.write('
' + escapeHtml(util.inspect(error)) + '
'); util.puts('500 Internal Server Error'); util.puts(util.inspect(error)); }; StaticServlet.prototype.sendMissing_ = function(req, res, path) { path = path.substring(1); res.writeHead(404, { 'Content-Type': 'text/html' }); res.write('\n'); res.write('\n'); res.write('
Not Found
'); res.write( '
The requested URL ' + escapeHtml(path) + ' was not found on this server.
' ); res.end(); util.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('\n'); res.write('\n'); res.write('
Forbidden
'); res.write( '
You do not have permission to access ' + escapeHtml(path) + ' on this server.
' ); res.end(); util.puts('403 Forbidden: ' + path); }; StaticServlet.prototype.sendRedirect_ = function(req, res, redirectUrl) { res.writeHead(301, { 'Content-Type': 'text/html', 'Location': redirectUrl }); res.write('\n'); res.write('\n'); res.write('
Moved Permanently
'); res.write( '
The document has moved here.
' ); res.end(); util.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('\n'); res.write('\n'); res.write('\n'); res.write(' ol { list-style-type: none; font-size: 1.2em; }\n'); res.write('\n'); res.write('
Directory: ' + escapeHtml(path) + '
'); res.write('
'); files.forEach(function(fileName) { if (fileName.charAt(0) !== '.') { res.write('

https://stackoverflow.com/questions/20036008/angular-seed-web-script-js-and-cors/' + escapeHtml(fileName) + '
'); } }); res.write('
'); res.end(); }; // Must be last, main(process.argv); 
 请帮帮我StackOverflow，你是我最后的希望。 


	







 
	
Answer 1
		      	
 你有类似的东西： https ： //github.com/angular/angular-seed/blob/master/scripts/web-server.js 
 所以你必须添加ALLOW CORS（看下面我添加了2行）到响应头： 
 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', // ALLOW CORS - line 1 !!! 'Access-Control-Allow-Origin' : '*', // ALLOW CORS - line 2 !!! 'Access-Control-Allow-Headers': 'X-Requested-With' }); 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); }); } }; 
 也许你有jsonp的其他function，所以添加到res.writeHead(200, CORS标题也是如此）。