When testing with Jmeter, many people do not know the difference and use of request parameters and body data. Here is a brief introduction:

 

First understand the basic concept of an interface

In the request-response between the client and the server, the HTTP protocol includesGET and POSTTwo basic request methods, the conceptual difference between the two is:

• get: Request data from the specified resource.
• post: Submit the data to be processed to the specified resource

The most intuitive performance is:

GET includes the parameters in the URL, and POST passes the parameters through the request body to submit the entire request to the server.Therefore, two methods should be distinguished in the interface test.

 

Jmeter contains two parameterization methods of Parameters and Body Data, what is the difference?

• When using Parameters, the Content-Type is not transmitted, or application / x-www-from-urlencoded is directly transmitted. If application / json is passed, an error occurs.
• When using Body Data, Content-Type can pass application / x-www-from-urlencoded or application / json, the difference between the two is the data format.

The difference can be seen from the post data:

Parameters request data:

Request data for body data:

Therefore, how to use the two parameterization methods of Jmeter Parameters and Body Data?

Generally speaking, Parameters for Get requests and Body Data for Post requests.

The exact statement for Post is:

• For common post request and upload interfaces, select Parameters.
• JSON and XML point data format request interface, select Body.

To explain in detail, according to the format of the post request data, there are two cases: map format and json format.

• Post request data is in map format

When the post request data is in map format, that is, the parameter name and parameter value are key-value key-value pairs, the requested parameters can be added to the Parameters parameter table, as shown below:

• Post request data is in json format

At the current stage, it is more popular to pass parameters in json format. When using jmeter, add the json format request data to the http request BodyData, as shown below:

{
    "username":"tanli",
    "password":"123456",
    "carddid":"${carddid}"
}

 

In addition, due to the POST request method, if the content-type of the headers is not set, the data will be submitted by application / x-www-form-urlencoded by default. In order to ensure that the Post request is transmitted in json format, you also need to declare the request parameter format as json in the request header. The specific operations are as follows:

Thread Group right-click Add "Config Element" HTTP Header Manager, open the HTTP header manager, Add a Name for Content-Type, Value for application / json, as shown below, a json format post request is completed ~