Post blog comment on the blog site using http protocol

: This article mainly introduces the use of http protocol to publish blog post comments. For more information about PHP tutorials, see. This blog POST undertakes "php uses socket to send GET and POST requests". we should use the encapsulated Http class above to consider how to submit comments to blog posts in the blog garden through php scripts.

Principle:

Before doing this, we must first understand that the essence of submitting a comment to a blog post is to send a post request through the http server. What do we need to do before publishing a comment? Yes, you must log on. However, login is another thing we will not discuss here. After a user logs on, the server sets a cookie for the client. Http is stateless. That is to say, after the client sends a request to the server, the server returns a response. One communication is complete. The server does not remember who sent the request to itself. Therefore, the client sends a request to the server with the cookie set by the server and notifies the server of its identity. the server generates a response based on the cookie. The principle is so simple. let's take a look at our practice.

Preparations:

In order to complete this test, I registered a blog post account (DeanHuangChopper). after logging on to the blog page, I opened my blog (DeanChopper) and opened one of my blog posts, for example, the article "understanding the buffer mechanism with php ob functions" (I am using Firefox, the biggest advantage is that the parameters sent to the server can be intuitively seen), open the developer option, prepare to record the process of sending comments. I write a comment and post a comment. This request has been recorded by the developer options.

We only need to pay attention to the request header.

Obviously, we can set the request header information through the setHeader () method of the Http class and send it through the post () method. First, we carefully analyze the request header information. Host, Content-type, Contetn-length will be set by default through some http methods, we can not add. Note that the Content-type is "application/json; charset = UTF-8", which is different from the default Http setting "application/x-www-form-urlencoded ". The request body is in json format, not an array format. Therefore, the original Http post method needs to be rewritten.

Publicfunction post ($ body) {$ this-> setLine ('post'); // reset the content-type $ this-> setHeader ('content-Type: application/json; charset = UTF-8 '); // skip the setBody method // $ this-> setBody ($ body); $ this-> body [] = $ body; // calculate content-length $ this-> setHeader ('content-length :'. strlen ($ this-> body [0]); $ this-> request (); return $ this-> response ;}

After modifying the Http class again, we can write the main code in this article. Theoretically, you only need to set the cookie value when setting the header information, but it is best to send all the header information to improve the success rate.

Before sending a comment, take a look at the sent parameters:

You only need to enter the content you want to send after "body.

Code section:

The main code of this article is as follows:

 SetHeader ('Accept-Language: zh-CN, zh; q = 0.8, en-US; q = 0.5, en; q = 100 '); $ http-> setHeader ('Accept-Language: zh-CN, zh; q = 0.8, en-US; q = 0.5, en; q = 100 '); $ http-> setHeader ('Accept-Encoding: gzip, deflate'); $ http-> setHeader ('x-Requested-With: XMLHttpRequest '); $ http-> setHeader ('referer: Caller); $ http-> setHeader ('cookie: _ ga = GA1.2.1359064105.1438444082; _ gads = ID = e0c32fd6db6e2a6d: T = 1438443900: S = ALNI_Mb6AAflcBD6gcdHgeE3IqVDJYnnjA ;. CNBlogsCookie = response; _ 5t_trace_sid = response; _ 5t_trace_tms = 1; _ gat = 1'); $ http-> setHeader ('pragma: no-cache '); $ http-> setHeader ('cache-Control: no-cache ');
// Set request body information
$ Msg = '{"blogApp": "DeanChopper", "postId": 4688667, "body": "Test Content", "parentCommentId": 0 }';
// Send a post request
$ Http-> post ($ msg); echo 'OK ';

The sending process may be slow. please wait.

Finally, I don't mind if you use this blog to send comments for testing, but pay attention to the terms.

The above introduces the use of http protocol to publish blog post comments, including content, hope to be helpful to friends interested in PHP tutorials.