WireMock Scenario跨请求存储数据异常：cachedRefNum无法读取求助

你的配置核心问题在于：

• transformerParameters仅用于给当前响应模板传递临时参数，不会将cachedRefNum存入WireMock的全局可跨请求访问的存储中
• Scenario的newScenarioState只是标记流程阶段，默认不支持存储自定义业务数据
  POST请求的响应能正确渲染是因为直接读取了请求体的jsonPath，并非transformerParameters起到了持久化作用

针对WireMock 3.x版本，推荐两种可靠的跨请求存取值方案：

方案1：使用全局变量存储（推荐，支持任意复杂值） #

利用WireMock响应模板的setGlobalVar和getGlobalVar指令实现全局数据持久化：

修正后的POST请求映射 #

{
  "mappings": [
    {
      "scenarioName": "Cache Ref Number",
      "requiredScenarioState": "Started",
      "newScenarioState": "Cached",
      "request": {
        "method": "POST",
        "urlPath": "/firstcall"
      },
      "response": {
        "status": 200,
        "body": "{\"message\": \"Cached {{jsonPath request.body '$.d.refNum'}}\"}",
        "transformers": ["response-template"],
        "transformerParameters": {
          "refNum": "{{jsonPath request.body '$.d.refNum'}}"
        },
        "postServeActions": [
          {
            "name": "transformer",
            "parameters": {
              "template": "{{setGlobalVar 'cachedRefNum' refNum}}"
            }
          }
        ]
      }
    }
  ]
}

修正后的GET请求映射 #

{
  "mappings": [
    {
      "scenarioName": "Cache Ref Number",
      "requiredScenarioState": "Cached",
      "request": {
        "method": "GET",
        "urlPathPattern": "/secondcall"
      },
      "response": {
        "status": 200,
        "body": "{\"cachedRefNum\": \"{{getGlobalVar 'cachedRefNum'}}\"}",
        "transformers": ["response-template"],
        "headers": {
          "Content-Type": "application/json"
        }
      }
    }
  ]
}

方案2：利用Scenario状态传递（适合简单字符串值） #

将需要存储的值直接嵌入Scenario的状态中，通过scenarioState指令读取：

POST请求映射（修改newScenarioState） #

{
  "mappings": [
    {
      "scenarioName": "Cache Ref Number",
      "requiredScenarioState": "Started",
      "newScenarioState": "{{#jsonPath request.body '$.d.refNum'}}Cached:{{.}}{{/jsonPath}}",
      "request": {
        "method": "POST",
        "urlPath": "/firstcall"
      },
      "response": {
        "status": 200,
        "body": "{\"message\": \"Cached {{jsonPath request.body '$.d.refNum'}}\"}",
        "transformers": ["response-template"]
      }
    }
  ]
}

GET请求映射（解析scenarioState） #

{
  "mappings": [
    {
      "scenarioName": "Cache Ref Number",
      "requiredScenarioState": "Cached:.*",
      "request": {
        "method": "GET",
        "urlPathPattern": "/secondcall"
      },
      "response": {
        "status": 200,
        "body": "{\"cachedRefNum\": \"{{replace scenarioState 'Cached:' ''}}\"}",
        "transformers": ["response-template"],
        "headers": {
          "Content-Type": "application/json"
        }
      }
    }
  ]
}

1. 重启WireMock加载修正后的映射
2. 发送POST请求：

   {
     "d": {
       "refNum": "1"
     }
   }
   

3. 发送GET请求/secondcall，将得到响应：

   {"cachedRefNum": "1"}
   

内容的提问来源于stack exchange，提问作者voccoeisuoi