V1.1.0 - Jsondata in Multipart/formdata header APIs defaults to "application/octet-stream"

[MounarajElangovan]

Version: 1.1.0

Problem Statement:
In new version of karate, multipart/formdata header APIs are not working as expected when we send both JSON data and files in same API request. This has been working perfectly in lower version (0.9.6).

JSON data in multipart/formdata requests defaults to "application/octet-stream" and content length is always "0".

Here, when we send files alone in multipart/formdata in new version of karate then it is working fine similar to lower versions (Issue occurs when sending JSON also).

I have attached working copy to replicate this issue along with some screenshots of karate reports with API response to differentiate the behavior in older version and current version for better understanding of the issue.

Attachments:

1. Working copy to replicate this issue in local -
multipart-header-working-copy.zip

Command to run: mvn clean test -Dtest=TestRunner

2. JSON defaults to octetstream screenshot -

3. V1.1.0 response screenshot (not expected behavior) -

4. V0.9.6 response screenshot (expected behavior) -

Please check and let me know if you need more information from my side.

[ptrthomas]

@MounarajElangovan can you please confirm if this works:

    * def temp = {"name": "mike", "age": 27, "validaccount": true}
    And multipart file jsondata = { value: '#(temp)' }

[MounarajElangovan]

@ptrthomas - It is working when we define data like this,

Request log for reference:

content-disposition: form-data; name="jsondata"; filename=""
content-type: application/json; charset=UTF-8
content-length: 44
Completed: true
IsInMemory: true

[ptrthomas]

@MounarajElangovan ok so you are confirming that's a valid workaround ?

[MounarajElangovan]

@ptrthomas Yes, I am confirming this is as a valid workaround, I have double checked this with my real time test case also. It is working fine with this workaround.

[ptrthomas]

@MounarajElangovan thanks ! you have solved a mystery that a few users reported and we were not able to figure out. you also have made me realize that httpbin can be used to troubleshoot file upload, thanks !

I've fixed this in develop, do see if you can validate by following the developer guide. but please use the workaround. in fact I am thinking of deprecating multipart field (and mutlipart fields), and you can use multipart file for everything, because you have full control over the content-type for each part.

so for others who land here: if you can't get multipart field to work for non-string values, please use mutipart file like this:

* url "https://httpbin.org/post"
* def temp = {"name": "mike", "age": 27, "validaccount": true}
* multipart file jsondata = { value: '#(temp)' }
* method post

[MounarajElangovan]

@ptrthomas Good morning! Wow! That is great to hear from you. I will try to validate using developer guide. Thanks again for fixing this, it will help us lot. Awesome!

[MounarajElangovan]

@ptrthomas I have validated in develop branch, it is working fine. Thanks!

[ptrthomas]

@nbhattr this is the wrong place for questions like this unless you follow this process: https://github.com/karatelabs/karate/wiki/How-to-Submit-an-Issue - so please use stack overflow if needed. that said you should probably spend some time reading this: #1645 (comment)

[ptrthomas]

1.2.0 released