Request - 简化HTTP客户端
使用超级简单
Request 被设计为尽可能最简单的方法，使HTTP调用。它支持HTTPS和默认遵循重定向。
var request = require('request'); request('http://www.google.com', function (error, response, body) { if (!error && response.statusCode == 200) { console.log(body) // Print the google web page. } }) Streaming
您可以传输到一个文件流的任何回应。
request('http://google.com/doodle.png').pipe(fs.createWriteStream('doodle.png')) You can also stream a file to a PUT or POST request. This method will also check the file extension against a mapping of file extensions to content-types (in this case application/json) and use the proper content-type in the PUT request (if the headers don’t already provide one).
fs.createReadStream('file.json').pipe(request.put('http://mysite.com/obj.json')) Request can also pipe to itself. When doing so, content-type and content-length are preserved in the PUT headers.
request.get('http://google.com/img.png').pipe(request.put('http://mysite.com/img.png')) Request emits a "response" event when a response is received. The response argument will be an instance of http.IncomingMessage.
request .get('http://google.com/img.png') .on('response', function(response) { console.log(response.statusCode) // 200 console.log(response.headers['content-type']) // 'image/png' }) .pipe(request.put('http://mysite.com/img.png')) Now let’s get fancy.
http.createServer(function (req, resp) { if (req.url === '/doodle.png') { if (req.method === 'PUT') { req.pipe(request.put('http://mysite.com/doodle.png')) } else if (req.method === 'GET' || req.method === 'HEAD') { request.get('http://mysite.com/doodle.png').pipe(resp) } } }) You can also pipe() from http.ServerRequest instances, as well as to http.ServerResponse instances. The HTTP method, headers, and entity-body data will be sent. Which means that, if you don't really care about security, you can do:
http.createServer(function (req, resp) { if (req.url === '/doodle.png') { var x = request('http://mysite.com/doodle.png') req.pipe(x) x.pipe(resp) } }) And since pipe() returns the destination stream in ≥ Node 0.5.x you can do one line proxying. :)
req.pipe(request('http://mysite.com/doodle.png')).pipe(resp) Also, none of this new functionality conflicts with requests previous features, it just expands them.
var r = request.defaults({'proxy':'http://localproxy.com'}) http.createServer(function (req, resp) { if (req.url === '/doodle.png') { r.get('http://google.com/doodle.png').pipe(resp) } }) You can still use intermediate proxies, the requests will still follow HTTP forwards, etc.