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Is there a way to access templated data after transformation? #571

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opened 2025-12-29 15:27:17 +01:00 by adam · 3 comments
adam commented 2025-12-29 15:27:17 +01:00
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Originally created by @vovka15 on GitHub (Feb 8, 2024).

Hello!

Question:

Is there a way to access templated data after transformation?

Context:

I am trying to perform some operations on response body AFTER transformation happened and THEN respond with modified body.

Example:

Request:

{
	"field": "value",
	"description": "desc"
}

I have possibility to access it's body by using templates. So code would look like this:

    server
        .Given(
            Request.Create().WithPath("/path").UsingPost()
        )
        .RespondWith(
            Response.Create()
                .WithStatusCode(200)
                .WithBody(" {{ request.body }} "))
                .WithTransformer()
    );

But the problem is I want to modify some fields of that request and add new field that depends on values that arrive in the given request - for example, operation that concatenates all received fields and returns base64 value of it.

So I want to pass received request in some function, manipulate it's data and only then return response.

I've tried that stupid solution, but it of course doesn't work.

    server
        .Given(
            Request.Create().WithPath("/path").UsingPost()
        )
        .RespondWith(
            Response.Create()
                .WithStatusCode(200)
                .WithBody(SomeFunction(" {{ request.body }} ")))
                .WithTransformer()
    );

Maybe there is solution, but I did not find any in the current wiki.

Can you please tell is there possibility to do that?

Originally created by @vovka15 on GitHub (Feb 8, 2024). Hello! Question: ------------- Is there a way to access templated data after transformation? Context: ------------- I am trying to perform some operations on response body AFTER transformation happened and THEN respond with modified body. Example: ------------- Request: ``` json { "field": "value", "description": "desc" } ``` I have possibility to access it's body by using templates. So code would look like this: ``` c# server .Given( Request.Create().WithPath("/path").UsingPost() ) .RespondWith( Response.Create() .WithStatusCode(200) .WithBody(" {{ request.body }} ")) .WithTransformer() ); ``` But the problem is I want to modify some fields of that request and add new field that depends on values that arrive in the given request - for example, operation that concatenates all received fields and returns base64 value of it. So I want to pass received request in some function, manipulate it's data and only then return response. I've tried that stupid solution, but it of course doesn't work. ``` c# server .Given( Request.Create().WithPath("/path").UsingPost() ) .RespondWith( Response.Create() .WithStatusCode(200) .WithBody(SomeFunction(" {{ request.body }} "))) .WithTransformer() ); ``` Maybe there is solution, but I did not find any in the current wiki. Can you please tell is there possibility to do that?
adam added the question label 2025-12-29 15:27:17 +01:00
adam closed this issue 2025-12-29 15:27:17 +01:00
adam commented 2025-12-29 15:27:17 +01:00
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@StefH commented on GitHub (Feb 8, 2024):

@vovka15
A possible way would be to use the existing Handlebars functions, see the documentation from Handlebars.Net for details.
In case, there is no function available, maybe a function is present in https://github.com/Handlebars-Net/Handlebars.Net.Helpers (for example Dynamic

If that is also not enough, you can write the function in c# with: WithBody and a callback function --> https://github.com/WireMock-Net/WireMock.Net/blob/master/src/WireMock.Net/ResponseBuilders/IBodyResponseBuilder.cs#L29

@StefH commented on GitHub (Feb 8, 2024): @vovka15 A possible way would be to use the existing Handlebars functions, see the documentation from Handlebars.Net for details. In case, there is no function available, maybe a function is present in https://github.com/Handlebars-Net/Handlebars.Net.Helpers (for example [Dynamic](https://github.com/Handlebars-Net/Handlebars.Net.Helpers/wiki/DynamicLinq#expression-v1) If that is also not enough, you can write the function in c# with: `WithBody` and a callback function --> https://github.com/WireMock-Net/WireMock.Net/blob/master/src/WireMock.Net/ResponseBuilders/IBodyResponseBuilder.cs#L29
adam commented 2025-12-29 15:27:18 +01:00
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@vovka15 commented on GitHub (Feb 8, 2024):

Thanks for suggestions!
I will report later after tests

@vovka15 commented on GitHub (Feb 8, 2024): Thanks for suggestions! I will report later after tests
adam commented 2025-12-29 15:27:18 +01:00
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@vovka15 commented on GitHub (Feb 8, 2024):

I used second variant and it works like a charm.
Thanks a lot!

@vovka15 commented on GitHub (Feb 8, 2024): I used second variant and it works like a charm. Thanks a lot!
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Reference: starred/WireMock.Net-wiremock#571