如何在WireMock中从请求JSON提取archiveId和amount到响应JSON

原请求匹配配置 #

{    
    "request":{
        "method" : "POST",
        "urlPattern" :"/payments/v1/payments",
        "headers":{
            "x-session-id":{
                "matches":"[0-9a-fA-F]{8}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{12}"
        },       
            "x-request-id":{
                "matches":"[0-9a-fA-F]{8}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{4}\\-[0-9a-fA-F]{12}"
        },
            "x-api-key":{
                "matches":"(?s).*"
            },         
           "Content-Type":{
                "equalTo":"application/json"
            },        
           "Accept":{
                "equalTo":"application/json"
            },
            "x-application-id":{
                "matches":"(?s).*"
            },
            "X-Client-Channel":{
                "equalTo":"client"
            },
            "Authorization":{
                "matches":"Bearer [a-zA-Z0-9&._-]{1,}"
            },
            "context":{
                "equalTo":"Pankin ostopolku"
            }   
        },
            "bodyPatterns": [
            {"matchesJsonPath": "$[?(@.isRetry == false)]"},  
            {"matchesJsonPath": "$[?(@.debtorAccount.IBAN == null)]"},
            {"matchesJsonPath": "$[?(@.debtorAccount.NotApplicable == 'NOT_APPLICABLE')]"},
            {"matchesJsonPath": "$[?(@.creditorAccount.IBAN =~ /.*/)]"},
            {"matchesJsonPath": "$[?(@.creditorAccount.NotApplicable == null)]"},
            {"matchesJsonPath": "$[?(@.creditorTransactionCode == '500')]"}, 
            {"matchesJsonPath": "$[?(@.instructedAmount.amount =~ /.*/)]"},
            {"matchesJsonPath": "$[?(@.instructedAmount.currency == 'EUR')]"},
            {"matchesJsonPath": "$[?(@.intermediaryAccount == '3531800')]"},
            {"matchesJsonPath": "$[?(@.ownMessage == null)]"},
            {"matchesJsonPath": "$[?(@.archiveId =~ /.*/)]"},
            {"matchesJsonPath": "$[?(@.paymentType =~ /.*/)]"}
        ]
     }   
  }

示例请求JSON #

{
    "isRetry": false,
    "debtorAccount": {
        "IBAN": null,
        "NotApplicable": "NOT_APPLICABLE"
    },
    "creditorAccount": {
        "IBAN": "FI2052091920276802",
        "NotApplicable": null
    },
    "creditorTransactionCode": "500",
    "instructedAmount": {
        "amount": "57000.00",
        "currency": "EUR"
    },
    "intermediaryAccount": "3531800",
    "ownMessage": null,
    "archiveId": "202311235SCL00000026",
    "paymentType": "CREDIT_ONLY"
}

示例响应JSON（目标格式） #

{
        "debtorAccount": {
            "NotApplicable": null
        },
        "additionalId": "0",
        "creditorAgent": {},
        "orderReceipt": "false",
        "needsSplit": "false",
        "transactionCode": null,
        "transactionDate": "2023-11-06",
        "ownMessage": null,
        "archiveId": "202311235SCL00000026",
        "transactionId": "59986920448925_2023-11-06_202311235SCL00000026_0",
        "paymentType": "CREDIT_ONLY",
        "paymentId": "A_59986920448925_2023-11-06_202311235SCL00000026_0",
        "creditorAccount": {
            "IBAN": null
        },
        "instructedAmount": {
            "amount": "57000.00",
            "currency": "EUR"
        },
        "bookingDate": "2023-11-06",
        "status": "PROCESSED",
        "modifications": {}
}

需求说明 #

需要把请求JSON中的archiveId和instructedAmount.amount字段值，自动填充到响应JSON的对应字段中，实现动态响应。

实现步骤 #

1. 启用WireMock的响应模板功能 #

WireMock的Response Templating是实现动态响应的核心功能，启用方式二选一：

• 命令行启动WireMock时添加参数：--enable-response-templating
• 在Stub的JSON配置中，响应部分添加"transformers": ["response-template"]

2. 修改Stub配置，添加动态响应模板 #

在原请求匹配配置的基础上，新增response节点，用{{jsonPath}}表达式从请求体中提取目标字段值，替换响应中的对应位置：

{    
    "request":{
        // 原请求匹配配置保持不变
        "method" : "POST",
        "urlPattern" :"/payments/v1/payments",
        "headers":{/* 原header匹配规则 */},
        "bodyPatterns": [/* 原body匹配规则 */]
    },
    "response": {
        "status": 200,
        "headers": {
            "Content-Type": "application/json"
        },
        "transformers": ["response-template"],
        "jsonBody": {
            "debtorAccount": {
                "NotApplicable": null
            },
            "additionalId": "0",
            "creditorAgent": {},
            "orderReceipt": "false",
            "needsSplit": "false",
            "transactionCode": null,
            "transactionDate": "2023-11-06",
            "ownMessage": null,
            "archiveId": "{{jsonPath request.body '$..archiveId'}}",
            "transactionId": "59986920448925_2023-11-06_{{jsonPath request.body '$..archiveId'}}_0",
            "paymentType": "CREDIT_ONLY",
            "paymentId": "A_59986920448925_2023-11-06_{{jsonPath request.body '$..archiveId'}}_0",
            "creditorAccount": {
                "IBAN": null
            },
            "instructedAmount": {
                "amount": "{{jsonPath request.body '$..instructedAmount.amount'}}",
                "currency": "EUR"
            },
            "bookingDate": "2023-11-06",
            "status": "PROCESSED",
            "modifications": {}
        }
    }
}

关键说明 #

• {{jsonPath request.body '$..archiveId'}}：通过JSONPath表达式从请求体中提取archiveId字段的值
• {{jsonPath request.body '$..instructedAmount.amount'}}：提取请求中instructedAmount.amount的值
• 不仅可以替换单独字段，还能像transactionId这样把提取的值嵌入到字符串中，实现更灵活的动态内容

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