HTTP notes and summaries (1) Telnet sends HTTP GET and HTTP POST requests separately

To simplify the saying:

WebService = HTTP protocol + XML

Rest = HTTP protocol + Json

Various APIs = HTTP protocol + Xml/json to implement

HTTP Request Information Format

① Request Line

A. request method : Get,post,put,delete,trace,options

B. request path (the requested resource, part of the URL)

C. protocol used

② Request header information

③ Request principal Information

HTTP requests In addition to the browser, any other tool that satisfies the HTTP protocol can send HTTP requests, such as telnet(the Telnet protocol is a member of the TCP/IP protocol family and is the standard protocol and primary way of Internet remote login service):

Enter the IP address of the server to receive the HTTP request :

127.0.0.17 80

(If you are prompted: ' Telnet ' is not an internal or external command, and is not a running program, go to: " Control Panel" and "Programs"---> "turn Windows features on or off", and check "Telnet Client")

Press CTRL +] + Enter to turn on the Echo function (easy to debug);

Now that the Telnet client is connected to port 80, the request can be sent according to the HTTP protocol standard:

GET request, request/php/http/1.php This path, request with http/1.1 Protocol ( request line input complete), enter

Virtual directory is host:127.0.0.17 ( request header information entered completed)

Enter

Carriage return ( blank line : header information and body information (can not) be distinguished by a blank line)

The HTTP request and response are as follows:

HTTP Response Information Format

The response information in the following:

http/1.1 okdate:tue, Jul 13:04:57 gmtserver:apache/2.2.21 (Win32) php/5.3.10x-powered-by:php/5.3.10content- Length:5content-type:text/htmlhello

which

Response Line : http/1.1 OK

Response Line 3 parts: protocol version (http/1.1), Status code (+), status text (OK)

Response Header Information : formatted as

Key:value

Key:value

Key:value

...

Key:value

content-length: Length of theme

Blank Line

Response body Information : Hello

"Example" completes the POST request for HTTP with Telnet.

First write a PHP file 2.php:

1 <? PHP 2 /* 3     Writing the received POST data to text 4     requires telnet to request 5*/6$ Strimplode$_post); 7 file_put_contents $str. " \ r \ n ", file_append); 8 Echo ' Write success ';

Parsing: The format of an HTTP request

$ method $ PATH $ protocol

Request header Information

(Blank line)

Request principal Information

Attention:

the length of the body should be indicated in the header message. content-length and principal type Content-type application/x-www-form-urlencoded

post/php/http/2.php http/1.1Host: 127.0.0.17Content-type:application/x-www-form-  Urlencodedcontent-length:19username=dee&age=28http/1.1 OKDate: Tue, Jul 16:15:03 gmtserver: apache/2.2.21 (Win32) php/5.3.10X-powered-by:php/5.3.10Content- Length:13Content-type:text/htmlwrite success lost the connection to the host. C:\users\administrator>

which

main information : username=dee&age=28

At the same time Post.txt:

This completes the POST request and response.

HTTP notes and summaries (1) Telnet sends HTTP GET and HTTP POST requests separately