Difference between get and post in communication protocol (HTTP)

Get: obtains the information of the resource specified by the request URI in Entity mode. If the request URI is only a data generation process, in the end, the response object will return the resource to which the result of the processing process points, rather than the description of the processing process.

Post: it is used to send a request to the target server, requiring it to accept the entity attached to the request and treat it as an additional sub-item of the resource specified by the request URI in the Request queue, post is designed to implement the following functions in a uniform way:
1: Explanation of existing resources
2: send messages to bulletin boards, newsgroups, email lists, or similar discussion groups.
3: submit data blocks
4: expand the database through additional operations

As described above, get is a request to request data from the server, while post is a request to submit data to the server, the data to be submitted is located in the entity behind the information header.
 
1. Get is to get data from the server, and post is to send data to the server.
 
2. Get is to add the parameter data queue to the URL referred to by the Action attribute of the submission form. The values correspond to each field in the form one by one and can be seen in the URL. Post uses the http post mechanism to place fields in the form and their content in the HTML header and send them to the URL address referred to by the Action attribute. You cannot see this process.
 
3. For the get method, the server uses request. querystring to obtain the value of the variable. For the POST method, the server uses request. Form to obtain the submitted data.
 
4. The data volume transmitted by get is small and cannot exceed 2 kb. The amount of data transmitted by post is large, which is generally not restricted by default. Theoretically, the maximum size of IIS4 is 80 KB, and that of iis5 is 100kb.
 
5. Low get security and high post security.

Difference between get and post in communication protocol (HTTP)