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Response Body Does Not Evaluate Multiple Handlebars Templates #701

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opened 2025-12-29 15:31:19 +01:00 by adam · 1 comment
adam commented 2025-12-29 15:31:19 +01:00
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Originally created by @adambricelis on GitHub (Jul 8, 2025).

Originally assigned to: @StefH on GitHub.

Describe the bug

When the mapping contains multiple handlebars templates in the response body, the response only includes the evaluation of the first handlebars template.

Expected behavior:

WireMock should evaluate all of the handlebars templates in the mapping and include them in the response.

Test to reproduce

Mapping:

[
  {
    "Request": {
      "Path": "/path0/path1",
      "Methods": [
        "GET"
      ]
    },
    "Response": {
      "StatusCode": 200,
      "BodyAsJson": {
        "field": "{{request.PathSegments.[0]}}{{request.PathSegments.[1]}}"
      },
      "UseTransformer": true,
      "Headers": {
        "Content-Type": "application/json"
      }
    }
  }
]

Request: GET http://{WIREMOCK_SERVER_HOST}/path0/path1

Expected response:

{
  "field": "path0path1"
}

Actual response:

{
  "field": "path0"
}

Other related info

This issue only occurs when the handlebars template is the prefix of a field in the response body. Adding any characters before the request path segment resolves the issue.

Mapping:

[
  {
    "Request": {
      "Path": "/path0/path1",
      "Methods": [
        "GET"
      ]
    },
    "Response": {
      "StatusCode": 200,
      "BodyAsJson": {
        "field": "prefix{{request.PathSegments.[0]}}{{request.PathSegments.[1]}}"
      },
      "UseTransformer": true,
      "Headers": {
        "Content-Type": "application/json"
      }
    }
  }
]

Request: GET http://{WIREMOCK_SERVER_HOST}/path0/path1
Response:

{
  "field": "prefixpath0path1"
}

Related issue: #1212

Originally created by @adambricelis on GitHub (Jul 8, 2025). Originally assigned to: @StefH on GitHub. ### Describe the bug When the mapping contains multiple handlebars templates in the response body, the response only includes the evaluation of the first handlebars template. ### Expected behavior: WireMock should evaluate all of the handlebars templates in the mapping and include them in the response. ### Test to reproduce Mapping: ``` json [ { "Request": { "Path": "/path0/path1", "Methods": [ "GET" ] }, "Response": { "StatusCode": 200, "BodyAsJson": { "field": "{{request.PathSegments.[0]}}{{request.PathSegments.[1]}}" }, "UseTransformer": true, "Headers": { "Content-Type": "application/json" } } } ] ``` Request: `GET http://{WIREMOCK_SERVER_HOST}/path0/path1` Expected response: ``` json { "field": "path0path1" } ``` Actual response: ``` json { "field": "path0" } ``` ### Other related info This issue only occurs when the handlebars template is the prefix of a field in the response body. Adding any characters before the request path segment resolves the issue. Mapping: ``` json [ { "Request": { "Path": "/path0/path1", "Methods": [ "GET" ] }, "Response": { "StatusCode": 200, "BodyAsJson": { "field": "prefix{{request.PathSegments.[0]}}{{request.PathSegments.[1]}}" }, "UseTransformer": true, "Headers": { "Content-Type": "application/json" } } } ] ``` Request: `GET http://{WIREMOCK_SERVER_HOST}/path0/path1` Response: ``` json { "field": "prefixpath0path1" } ``` Related issue: #1212
adam added the bug label 2025-12-29 15:31:19 +01:00
adam closed this issue 2025-12-29 15:31:20 +01:00
adam commented 2025-12-29 15:31:21 +01:00
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@StefH commented on GitHub (Jul 12, 2025):

https://github.com/wiremock/WireMock.Net/pull/1329

@StefH commented on GitHub (Jul 12, 2025): https://github.com/wiremock/WireMock.Net/pull/1329
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Reference: starred/WireMock.Net-wiremock#701