Question

在Angular 7中，我正在调用我们的MS WebApi并收到错误响应，但似乎无法正确解析。原始响应如下所示：

"{"Message":"Add System Instance Failed", "MessageDetail":"2; Cannot insert duplicate key row in object 'dbo.SystemInstanceTbl' with unique index 'IX_SystemInstanceTbl'. The duplicate key value is (The_Duplicate_Value).
The statement has been terminated.", "ErrorCode":"50105952", "Exception":"System.ServiceModel.FaultException`1[Objects.FaultDetail]: Add  System Instance Failed."}"

错误响应作为对象返回：

 error.error

但是JSON.parse(error.error)会引发JSON错误Unexpected token in JSON at position 242。

提取Message和MessageDetail属性的最干净方法是什么？

我的错误处理程序如下：

protected handleError(error: HttpErrorResponse) {    
    let err = (error && error.message !== undefined) ? error.message : '';  

    
    console.log(err);    
    return throwError(err);
  }

Answer 1

似乎问题在于JSON字符串包含一些换行符。

您可以将其替换为空格，这是一个示例：

let jsonStr = `{"Message":"Add System Instance Failed", "MessageDetail":"2; Cannot insert duplicate key row in object 'dbo.SystemInstanceTbl' with unique index 'IX_SystemInstanceTbl'. The duplicate key value is (The_Duplicate_Value).
The statement has been terminated.", "ErrorCode":"50105952", "Exception":"System.ServiceModel.FaultException\`1[Objects.FaultDetail]: Add  System Instance Failed."}`;

jsonStr = jsonStr.replace(/\n/g, " ");

const data = JSON.parse(jsonStr);
console.log(data);

尝试解析Observable返回的错误

1 个答案: