Node.js中的http请求客户端示例(request client)

var request = require('request');

request('http://www.google.com', function (error, response, body) {
 if (!error && response.statusCode == 200) {
  console.log(body);
 }
})

var http = require('http')
var url  = require('url')


var request = function(reqUrl, data, cb, headers) {
 var dataType = typeof data

 if (dataType == 'function') {
  headers = cb
  cb   = data
  rawData = null
 } else if (dataType == 'object') {
  rawData = JSON.stringify(data)
 } else {
  rawData = data
 }

 var urlObj = url.parse(reqUrl)

 var options = {
   hostname : urlObj.hostname
  , port   : urlObj.port
  , path   : urlObj.pathname
  , method  : rawData ? 'post' : 'get'
 }

 headers && (options.headers = headers)


 var req = http.request(options, function(res) {
  var receives = []

  if (res.statusCode !== 200) {
   cb && cb(new Error('Request Failed. Status Code: ' + res.statusCode + ' ' + reqUrl))
   return
  }

  res.on('data', function(chunk) {
   receives.push(chunk)
  })

  res.on('end', function() {
   var resData = Buffer.concat(receives).toString()
   try {
    resData = JSON.parse(resData)
   } catch (e) { }

   cb && cb(null, res, resData)
  })
 })

 req.on('error', function(e) {
  cb && cb(e)
 })

 rawData && req.write(rawData)

 req.end()
}


module.exports = request

request('http://news.sina.com.cn', function(err, res, data) {
 console.log('geted', data)
})

request('http://news.sina.com.cn', function(err, res, data) {
 console.log('get with cookie', data)
}, { cookie: '_sessionid=1234567890' })

request('http://news.sina.com.cn', { postdata: 'json' }, function(err, res, data) {
 console.log('get with cookie', data)
}, { cookie: '_sessionid=1234567890' })