NodeJS调用第三方RestAPI的实现

asdrtu

var http = require('http'),
https = require('https'),
Q = require('Q');


var util = {
/**
* HOW TO Make an HTTP Call - GET
*
*  options for GET
*  var optionsget = {
*      hostname : 'api.t.sina.com.cn',
*      path : '//provinces.json' // the rest of the url with parameters if needed
*  };
*/
get : function(optionsget){
return this.request(optionsget,'GET',null,false);
},
post : function(optionspost,jsonObject){
return this.request(optionspost,'POST',jsonObject,false);
},
/**
* HOW TO Make an HTTPs Call - GET
*
*  options for GET
*  var optionsget = {
*      hostname : 'graph.facebook.com',
*      path : '/youscada' // the rest of the url with parameters if needed
*  };
*/
secureGet : function(optionsget){
return this.request(optionsget,'GET',null,true);
},
/**
* HOW TO Make an HTTPs Call - POST
*
*  options for POST
*  var optionspost = {
*      hostname : 'graph.facebook.com',
*      path : '/youscada/feed?access_token=your_api_key'
*  };
*/
securePost : function(optionspost,jsonObject){
return this.request(optionspost,'POST',jsonObject,true);
},
/**
*  var options = {
*      hostname : 'graph.facebook.com',
*      path : '/youscada/feed?access_token=your_api_key'
*  }
*/
request : function(options,method,jsonObject,isSecure){
if(!(options && options.hostname && options.path)){
throw new Error('Omit property : "hostname" or "path".');
}
options.method = method || 'GET';
options.port = options.port || 80;
if(Object.prototype.toString.call(jsonObject) === '[object Object]'){
jsonObject = JSON.stringify(jsonObject);
var postheaders = {
'Content-Type' : 'application/json',
'Content-Length' : Buffer.byteLength(jsonObject, 'utf8')
};
options.headers = postheaders;
}
var protocal = http;
if(isSecure){
options.port = 443;
protocal = https;
}
var deferred = Q.defer();
var body = "";
// do the POST call
var request = protocal.request(options, function(res) {
res.on('data', function(trunk) {
body += trunk;
}).on('end',function(){
deferred.resolve(body);
}).on('errer',function(err){
deferred.reject(err);
});
});
// write the json data
if(options.method === 'POST'){
request.write(jsonObject);
}
request.end();
request.on('error', function(e) {
deferred.reject(e);
});
return deferred.promise;
}
};
module.exports = util;

……
router.get('/rest', function(req, res,next) {
var promise = restUtil.get({
hostname : "api.t.sina.com.cn",
path : "/provinces.json"
});
promise.then(function(data){
res.send(data);
},function(err){
next(err);
});
});
……