使用curl调用REST API上传JSON文件时遇解析错误求解决

执行的curl请求 #

curl -k -v -X POST 'https://myserver.ru/services/localizationservice/api/Dictionaries/UploadJson' -H 'accept: text/plain' -H  'Content-Type: text/json' -d "{'data': @test.json, 'fileType': json, 'isDelete': false}"

收到的500错误响应 #

{"message":"Validation error: data=Unexpected character encountered while parsing value: @. Path 'data', line 1, position 9./Unexpected character encountered while parsing value: @. Path 'data', line 1, position 9.","exceptionType":"ASE.MD.Platform.Utils.ServiceBase.Exceptions.CustomValidationException, ASE.MD.Platform.Utils.ServiceBase, Version=12.0.21.0, Culture=neutral, PublicKeyToken=null","code":"500","source":"dotnet","inners":[],"extra":"   at ASE.MD.Platform.Utils.ServiceBase.ValidationExt.<>c.<AddCustomValidation>b__0_1(ActionContext c)\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ModelStateInvalidFilter.OnActionExecuting(ActionExecutingContext context)\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeNextActionFilterAsync()\n--- End of stack trace from previous location ---\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()\n--- End of stack trace from previous location ---\n   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|26_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)","isError":true,"id":"","type":"Error"}

test.json文件内容 #

{  
  "DictionaryCode": "test",  
  "Translations": [  
    {  
      "Key": "Connection",  
      "Words": [  
        {  
          "CultureCode": "en-US",  
          "Word": "Connection"  
        },  
        {  
          "CultureCode": "ru-RU",  
          "Word": "Связь"  
        }  
      ]  
    },  
    {  
      "Key": "first+second",  
      "Words": [  
        {  
          "CultureCode": "ru-RU",  
          "Word": ""  
        },  
        {  
          "CultureCode": "en-US",  
          "Word": ""  
        }  
      ]  
    },  
    {  
      "Key": "VersionDiff_DisableReason_KeyAttributesNotSet",  
      "Words": [  
        {  
          "CultureCode": "en-US",  
          "Word": "There's nothing you don't need"  
        },  
        {  
          "CultureCode": "ru-RU",  
          "Word": "Нет чего не надо"  
        }  
      ]  
    }  
  ]
}

修复方案 #

错误原因 #

原命令中，-d参数的JSON字符串里的@test.json不会被curl解析为文件内容，而是作为纯字符串@test.json发送给后端。后端解析JSON时，@属于非法起始字符，因此抛出验证错误。

正确的请求方式 #

方法1：使用jq构造合法JSON（推荐）

利用jq工具读取文件内容并生成符合要求的JSON请求体，同时将Content-Type改为标准的application/json：

curl -k -v -X POST 'https://myserver.ru/services/localizationservice/api/Dictionaries/UploadJson' \
-H 'accept: text/plain' \
-H 'Content-Type: application/json' \
-d "$(jq -n --arg data "$(cat test.json)" '{data: $data, fileType: "json", isDelete: false}')"

方法2：手动转义文件内容并构造JSON

如果没有jq，可以用cat和sed转义文件中的双引号，再构造JSON：

curl -k -v -X POST 'https://myserver.ru/services/localizationservice/api/Dictionaries/UploadJson' \
-H 'accept: text/plain' \
-H 'Content-Type: application/json' \
-d "{\"data\": \"$(cat test.json | sed 's/"/\\"/g')\", \"fileType\": \"json\", \"isDelete\": false}"

注意事项 #

• 确保test.json文件路径正确，若不在当前目录需使用绝对路径。
• Content-Type头使用标准的application/json而非text/json，避免部分服务解析异常。

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