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From Philippe Mouawad <>
Subject MultiPart/form-data : Supporting JSON body + file upload
Date Wed, 01 Mar 2017 21:36:45 GMT
Recent JS libraries (Angular + ng-file-upload for example) allow posting a
request with:
- Parameters  that contains JSON
- 1 or more files


{file: file, info: Upload.jsonBlob({id: id, name: name, ...})} send
fields as json blob, 'application/json' content_type

POST /demo/model HTTP/1.1
Connection: keep-alive
Accept-Language: en-US,en;q=0.5
Cache-Control: no-cache
Accept-Encoding: gzip, deflate
Pragma: no-cache
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:51.0)
Gecko/20100101 Firefox/51.0
Accept: application/json, text/plain, */*
Content-Length: 9145
Content-Type: multipart/form-data;
boundary=cP4hM4kXJ134rNoUFiCCjcKhk4uzVlZAnFYBdQ; charset=UTF-8
Host: localhost:8081

Content-Disposition: form-data; name="file"; filename="jmeter.png"
Content-Type: image/png

binary data here .......

Content-Disposition: form-data; name="info"; filename="dem_modele.json"
*Content-Type: application/json*


Simulating this in JMeter is not very easy as you need to use the 3rd tab
and put the json body in a file.

This make variabilization of JSON content difficult.

Ideally It would be much better if parameters table could be used,
but it doesn't work as you cannot set Content-Type for parameters.

How could we implement such case in the GUI ?:

- Add a new column that would only be used in some case ? not very
nice? How would we decide wether we use it or not ?

- Create some new Component (ParameterContentTypeSetter) that would
tell HttpRequest the Content-Type of each parameter

by its name ?

- Any other ideas ?



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