What is the difference between post request and get request in Ajax?

get and post in ajax are two common methods for request-response on the client and server. So, what is the difference between get and post requests? This article will introduce to you the difference between post request and get request in ajax. Friends in need can refer to it.

Let’s take a look at the concepts of get request and post requestrequest in ajax respectively.

The get request is to request data from a specified resource. The get request is basically used to obtain (retrieve) data from the server. Note: The GET method may return cached data.

The post request is to submit the data to be processed to the specified resource. The post request can also be used to obtain data from the server. However, the post method does not cache data and is often used to send data along with the request.

From the above description of the concepts of get request and post request in ajax, we can actually find the differences, but for beginners, they should not be able to better understand it simply from the concept. , let’s take a closer look at the difference between get requests and post requests in

ajax.

The difference between get request and post request in ajax 1:

1get adds the parameter data queue to the submission In the URL pointed to by the ACTION attribute of the form, the values ​​correspond to each field in the form and can be seen in the URL. post is via HTTP The post mechanism places each field in the form and its content in the HTML HEADER and transmits it to the URL address pointed to by the ACTION attribute. Users cannot see this process.

The difference between get request and post request in ajax 2:

For the get method, the server side uses Request.QueryString to obtain the value of the variable. For the post method, the server side Use Request.Form to obtain submitted data. Parameters in both ways can be obtained using Request.

Difference 3 between get request and post request in ajax:

The amount of data transmitted by get is small and cannot be greater than 2KB. The amount of data transmitted by post is relatively large and is generally unrestricted by default. But in theory, it varies from server to server.

The difference between get request and post request in ajax is four:

Get security is very low, and post security is high.

The difference between get request and post request in ajax five:

Follows is the same, that is to say, when the method is get, the parameter list at the end of the action page will be ignored; and Follow is different.

The difference between get request and post request in ajax 6:

Get request has the following characteristics: it will add data to the URL and pass it to Server, usually using a question mark? Represents the end of the URL address and the beginning of the data parameters. Each data parameter of the following parameters appears in the form of "name=value", and the parameters are distinguished by a connector &. The Post request has the following characteristics: the data is placed in the HTTP body, and it is organized in more than one way, including the & connection method and the delimiter method. It can hide parameters and transfer large amounts of data, which is more convenient.

Finally, let’s take a look at the circumstances under which post requests and get requests are used.

When any of the following conditions are met, use the post method:

1. The result of the request has persistent side effects, for example, adding new data rows to the database.

2. If you use the GET method, the data collected on the form may make the URL too long.

3. The data to be transmitted does not use 7-bit ASCII encoding.

When any of the following conditions are met, use the get method:

1. The request is to find resources, and the HTML form data is only used to help search.

2. The request result has no persistent side effects.

3. The total length of the collected data and input field names in the HTML form shall not exceed 1024 characters.

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