node. JS (11)--request/get Implementation Comment function

HTTP Get/request can initiate an HTTP request from the background to obtain remote resources

, and even updating and synchronizing remote resources is very useful.

Essentially, the request returns an instance of the Clientrequest class.

This clientrequest instance is a writable stream, if you need to upload a file using a POST request,

Then this file will be written to the Clientrequest object,

How to use it?

Syntax: Http.request (Options[,callback])

If the first parameter is an object, a series of configurations can be made to customize the format of the request we need to make.

Common parameters are:

Host:java Server domain name or IP address

Aliases for Hostname:host

Port: Port number default is 80

LocalAddress: A local interface for binding to a network connection

Method: A String that specifies the methods of the HTTP request. The default is ' GET '

Path: The route of the request. The default is '/'. The query string, if any, should be included. Like '/index.html?page=12 '

Headers: An object containing the request header

AUTH: The Basic authentication used to calculate the authentication head, usually the user to keep up with password

Agent: Controlling the behavior of the agent

KeepAlive: Keep the socket around the resource in the future can be continued for other requests, default is False

To implement the submit function of a comment ...

Key references: Request Headers

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The second is: Response, which is usually the JSON data returned

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We need to copy the contents of the request headers.

These parameters for the background server to do the analysis to determine that you are logged in and is a real user, then this review is legal,

Var http = require (' http ')//Can serialize an object Var querystring = require (' QueryString ') Var postdata = querystring.stringify ({' content ': ' Preparing for the second quarter ', ' CID ': 348}) var options =  {hostname: ' www.imooc.com ', Port:80,path: '/course/docomment ', Method: ' POST ', headers:{' Accept ': ' application/ json, text/javascript, */*; q=0.01 ', ' accept-encoding ': ' gzip, deflate ', ' Accept-Language ': ' zh-cn,zh;q=0.8 ', ' Connection ': ' keep-alive ',//modify the length here to change ' content-length ':p ostdata.length, ' content-type ': ' Application/x-www-form-urlencoded; charset=utf-8 ', ' Cookie ': ' imooc_uuid= 80a28286-15ef-4fe7-a10f-341b99d11357; imooc_isnew_ct=1486736221; bdshare_firstime=1486736247756;  ajstat_ok_times=18; phpsessid=mjhe6ik85emsonjhsn7v3t9mp4; loginstate=1; apsid= Qzn2u2ogvhm2i0nge0mgnmnmnjymezn2q5yta0m2uaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa Aaaaamjkwmdcxngaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa4ndu3nzkynjvacXeuy29taaaaaaaaaaaaaaaaaaaaaguwzmflmdjiyjg4ytbkmjcxmme5yjcyyzjlzjixnzhhb0hwwg9b1lg%3dow; last_login_ username=845779265%40qq.com; hm_lvt_f0cfcccd7b1393990c78efdeebff3968= 1490406351,1490435767,1490435811,1490450848; hm_lpvt_f0cfcccd7b1393990c78efdeebff3968=1490490428;  imcdns=0; imooc_isnew=2; cvde=58d5080dadc94-140 ', ' Host ': ' www.imooc.com ', ' Origin ': '/http Www.imooc.com ', ' Referer ': ' http://www.imooc.com/comment/348 ', ' user-agent ': ' mozilla/5.0  (windows nt  6.1; WOW64)  AppleWebKit/537.36  (Khtml, like gecko)  chrome/45.0.2454.101  safari/537.36 ', ' x-requested-with ': ' XMLHttpRequest '}}var req = http.request (options, Function (res) {Console.log (' Status: ' +res.statuscode) console.log (' Headers: ' +json.stringify (res.headers))// We send it in a stream when we receive the data, so it//triggers a On.data event res.on (' Data ', function (chunk) {Console.log (Buffer.isbuffer (chunk)) Console.log (Typeof chunk)})//Network End Res.on (' End ', function () {console.log (' comment complete ')})}) reQ.on (' Error ', function (e) {console.log (' ERROR: ' +e.message)})//writereq.write (postdata)//endreq.end () 

The results of the operation are as follows:

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Get method, most of the cases we just submit a request to query, in fact there is no specific

Data submission, this time will use the Get method, and the request method difference is:

Method is set to get and automatically calls end methods

This article is from the "It Rookie" blog, make sure to keep this source http://mazongfei.blog.51cto.com/3174958/1910420

node. JS (11)--request/get Implementation Comment function