Jmeter upload file interface test
Everyone must have done interface testing , but the interface for uploading files may be at a loss. Actually, that's still the case~
1. Interface business
On the premise that the interface document is missing, then start playing with packet capture~ Fiddler or F12 are fine.
The function implemented by our interface this time is to upload user avatars.
The screenshot of F12 packet capture is as follows: (the key points related to the interface are circled)
Here, pay special attention to the MIME type and upload file interface. If the MIME type is sent incorrectly, the interface cannot be adjusted.
Two, jmeter debugging
1. Thread group
For debugging of a single interface, the thread group 1-1-1 is enough
2. Configuration components
Add an asynchronous request header (synchronous, asynchronous stupidly unclear. ┭┮﹏┭┮)
Upload file interface, requires login authentication, add Cookie Manager to maintain identity status 
Add HTTP request default value, convenient for subsequent debugging~
3. Debug login interface 
4. Debug upload file interface
Upload the avatar interface, because the Content-Type captured by our packet capture is: multipart/form-data, so we check "Use mulipart/form-data for POST". 
The form-data form sends a total of 2 parameters.
The first parameter, the key is name, the value is 123.png 
The second parameter, the key is file, the value is 123.png, plus the MIME type.
The final result, the upload is successful
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Eight, JMeter performance test
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