npm install request

var request = require('request');
request('http://www.baidu.com', function (error, response, body) {
  if (!error && response.statusCode == 200) {
    console.log(body) // 请求到主页的HTML
  }
})

request('http://google.com/doodle.png').pipe(fs.createWriteStream('doodle.png'))

fs.createReadStream('file.json').pipe(request.put('http://mysite.com/obj.json'))

request.get('http://google.com/img.png').pipe(request.put('http://mysite.com/img.png'))

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'))

request
  .get('http://mysite.com/doodle.png')
  .on('error', function(err) {
    console.log(err)
  })
  .pipe(fs.createWriteStream('doodle.png'))

http.createServer(function (req, resp) {
  if (req.url === '/doodle.png') {
    var x = request('http://mysite.com/doodle.png')
    req.pipe(x)
    x.pipe(resp)
  }
})

req.pipe(request('http://mysite.com/doodle.png')).pipe(resp)

request.post('http://service.com/upload', {form:{key:'value'}})
// or
request.post('http://service.com/upload').form({key:'value'})
// or
request.post({url:'http://service.com/upload', form: {key:'value'}}, function(err,httpResponse,body){ /* ... */ })

var formData = {
  // 键-值对简单值
  my_field: 'my_value',
  // 使用 Buffers 添加数据
  my_buffer: new Buffer([1, 2, 3]),
  // 使用 Streams 添加数据
  my_file: fs.createReadStream(__dirname + '/unicycle.jpg'),
  // 通过数组添加 multiple 值
  attachments: [
    fs.createReadStream(__dirname + '/attachment1.jpg'),
    fs.createReadStream(__dirname + '/attachment2.jpg')
  ],
  // 添加可选的 meta-data 使用: {value: DATA, options: OPTIONS}
  // 对于一些流类型，需要提供手工添加 "file"-关联
  // 详细查看 `form-data` : https://github.com/form-data/form-data
  custom_file: {
    value:  fs.createReadStream('/dev/urandom'),
    options: {
      filename: 'topsecret.jpg',
      contentType: 'image/jpg'
    }
  }
};
request.post({url:'http://service.com/upload', formData: formData}, function optionalCallback(err, httpResponse, body) {
  if (err) {
    return console.error('upload failed:', err);
  }
  console.log('Upload successful!  Server responded with:', body);
});

request.get('http://some.server.com/').auth('username', 'password', false);
// or
request.get('http://some.server.com/', {
  'auth': {
    'user': 'username',
    'pass': 'password',
    'sendImmediately': false
  }
});
// or
request.get('http://some.server.com/').auth(null, null, true, 'bearerToken');
// or
request.get('http://some.server.com/', {
  'auth': {
    'bearer': 'bearerToken'
  }
});

var username = 'username',
    url = 'http://' + username + ':' + password + '@some.server.com';
request({url: url}, function (error, response, body) {
   // Do more stuff with 'body' here
});

var request = require('request');
var options = {
  url: 'https://api.github.com/repos/request/request',
  headers: {
    'User-Agent': 'request'
  }
};
function callback(error, response, body) {
  if (!error && response.statusCode == 200) {
    var info = JSON.parse(body);
    console.log(info.stargazers_count + " Stars");
    console.log(info.forks_count + " Forks");
  }
}
request(options, callback);

// OAuth1.0 - 3-legged server side flow (Twitter example)
// step 1
var qs = require('querystring')
  , oauth =
    { callback: 'http://mysite.com/callback/'
    , consumer_key: CONSUMER_KEY
    , consumer_secret: CONSUMER_SECRET
    }
  , url = 'https://api.twitter.com/oauth/request_token'
  ;
request.post({url:url, oauth:oauth}, function (e, r, body) {
  // Ideally, you would take the body in the response
  // and construct a URL that a user clicks on (like a sign in button).
  // The verifier is only available in the response after a user has
  // verified with twitter that they are authorizing your app.
  // step 2
  var req_data = qs.parse(body)
  var uri = 'https://api.twitter.com/oauth/authenticate'
    + '?' + qs.stringify({oauth_token: req_data.oauth_token})
  // redirect the user to the authorize uri
  // step 3
  // after the user is redirected back to your server
  var auth_data = qs.parse(body)
    , oauth =
      { consumer_key: CONSUMER_KEY
      , consumer_secret: CONSUMER_SECRET
      , token: auth_data.oauth_token
      , token_secret: req_data.oauth_token_secret
      , verifier: auth_data.oauth_verifier
      }
    , url = 'https://api.twitter.com/oauth/access_token'
    ;
  request.post({url:url, oauth:oauth}, function (e, r, body) {
    // ready to make signed requests on behalf of the user
    var perm_data = qs.parse(body)
      , oauth =
        { consumer_key: CONSUMER_KEY
        , consumer_secret: CONSUMER_SECRET
        , token: perm_data.oauth_token
        , token_secret: perm_data.oauth_token_secret
        }
      , url = 'https://api.twitter.com/1.1/users/show.json'
      , qs =
        { screen_name: perm_data.screen_name
        , user_id: perm_data.user_id
        }
      ;
    request.get({url:url, oauth:oauth, qs:qs, json:true}, function (e, r, user) {
      console.log(user)
    })
  })
})

request(options, callback);
// 或
request(url, options, callback);

request.METHOD(options, callback);
// 或
request.METHOD(url, options, callback);

request.defaults(options)

// 使用 baseRequest() 进行请求是会设置一个 'x-token' 请求头
var baseRequest = request.defaults({
  headers: {'x-token': 'my-token'}
})
// 使用 specialRequest() 进行请求时，会包含一个在 baseRequest 中设置的 'x-token' 请求头
// 还会有一个 'special' 请求头
var specialRequest = baseRequest.defaults({
  headers: {special: 'special value'}
})

request.put(url)

request.patch(url)

request.post(url)

request.head(url)

request.del(url)
request.delete(url)

request.get(url)、

request.cookie('key1=value1')

request.jar()