Proxy mode: Incorrect handling of multipart requests #271

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opened 2025-12-29 08:25:12 +01:00 by adam · 6 comments

adam commented 2025-12-29 08:25:12 +01:00

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Originally created by @LevYas on GitHub (May 17, 2020).

I have an ASP.Net Core API method with the following signature

[HttpPut("pic")]
public ActionResult UpdatePicture(IFormFile file)

I call this method from Postman or curl or from my front-end with a small picture file. It's ok without proxy, but with proxy file is always null.

It looks like WireMock.Net treats multipart requests as a single part request with raw data, but I can be wrong. I added reading the Form field and it contains the right content:

I created a repro here https://github.com/LevYas/WireMockNetRepro

Originally created by @LevYas on GitHub (May 17, 2020). I have an ASP.Net Core API method with the following signature ``` [HttpPut("pic")] public ActionResult UpdatePicture(IFormFile file) ``` I call this method from Postman or curl or from my front-end with a small picture file. It's ok without proxy, but with proxy file is always null. It looks like WireMock.Net treats multipart requests as a single part request with raw data, but I can be wrong. I added reading the `Form` field and it contains the right content:  I created a repro here https://github.com/LevYas/WireMockNetRepro

adam added the bug label 2025-12-29 08:25:12 +01:00

adam closed this issue 2025-12-29 08:25:12 +01:00

adam commented 2025-12-29 08:25:13 +01:00

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@StefH commented on GitHub (May 22, 2020):

Bug is confirmed, thanks for analyzing.

However fixing will take some time...

@StefH commented on GitHub (May 22, 2020): Bug is confirmed, thanks for analyzing. However fixing will take some time...

adam commented 2025-12-29 08:25:13 +01:00

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@LevYas commented on GitHub (May 22, 2020):

You are welcome. Yeah, fix will not be trivial, especially bearing in mind different target frameworks.

@LevYas commented on GitHub (May 22, 2020): You are welcome. Yeah, fix will not be trivial, especially bearing in mind different target frameworks.

adam commented 2025-12-29 08:25:13 +01:00

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@StefH commented on GitHub (May 23, 2020):

https://github.com/WireMock-Net/WireMock.Net/pull/473

@StefH commented on GitHub (May 23, 2020): https://github.com/WireMock-Net/WireMock.Net/pull/473

adam commented 2025-12-29 08:25:13 +01:00

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@StefH commented on GitHub (May 23, 2020):

@LevYas Can you try version WireMock.Net.1.2.11-ci-13392 ?

@StefH commented on GitHub (May 23, 2020): @LevYas Can you try version `WireMock.Net.1.2.11-ci-13392` ?

adam commented 2025-12-29 08:25:14 +01:00

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@LevYas commented on GitHub (May 23, 2020):

@StefH - you are incredibly fast. I've just tested - it works!

@LevYas commented on GitHub (May 23, 2020): @StefH - you are incredibly fast. I've just tested - it works!

adam commented 2025-12-29 08:25:14 +01:00

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@StefH commented on GitHub (May 23, 2020):

You are a very good tester!

I will make new official version today.

@StefH commented on GitHub (May 23, 2020): You are a very good tester! I will make new official version today.

adam referenced this issue 2025-12-29 08:33:42 +01:00

[PR #271] [MERGED] Support Dynamic response files using Handlebars templating #835

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Reference: starred/WireMock.Net#271