Node.jsクローラーのWebリクエストモジュールの詳細説明

var https = require('https');
https.get('https://encrypted.google.com/', function(res) {
 console.log("statusCode: ", res.statusCode);
 console.log("headers: ", res.headers);

 res.on('data', function(d) {
  process.stdout.write(d);
 });

}).on('error', function(e) {
 console.error(e);
});

var nodegrass = require('nodegrass');
nodegrass.get("http://www.baidu.com",function(data,status,headers){
  console.log(status);
  console.log(headers);
  console.log(data);
},'gbk').on('error', function(e) {
  console.log("Got error: " + e.message);
});

var nodegrass = require('nodegrass');
nodegrass.get("https://github.com",function(data,status,headers){
  console.log(status);
  console.log(headers);
  console.log(data);
},'utf8').on('error', function(e) {
  console.log("Got error: " + e.message);
});

var ng=require('nodegrass');
ng.post("https://api.weibo.com/oauth2/access_token",function(data,status,headers){
  var accessToken = JSON.parse(data);
  var err = null;
  if(accessToken.error){
     err = accessToken;
  }
  callback(err,accessToken);
  },headers,options,'utf8');

var headers = {
    'Content-Type': 'application/x-www-form-urlencoded',
    'Content-Length':data.length
  };

var options = {
       client_id : 'id',
     client_secret : 'cs',
     grant_type : 'authorization_code',
     redirect_uri : 'your callback url',
     code: acode
  };