ASP.NET Core AutoWrapper 自定义响应输出实现(2)

如果映射满足不了我们的需求。并且我们需要向API响应模型中添加其他属性，那么我们现在可以自定义自己的格式类，通过设置UseCustomSchema为true来实现，代码如下所示

app.UseApiResponseAndExceptionWrapper(new AutoWrapperOptions { UseCustomSchema = true });

现在假设我们想在主API中响应中包含一个属性SentDate和Pagination对象，我们可能希望将API响应模型定义为以下格式

public class MyCustomApiResponse { public int Code { get; set; } public string Message { get; set; } public object Payload { get; set; } public DateTime SentDate { get; set; } public Pagination Pagination { get; set; } public MyCustomApiResponse(DateTime sentDate, object payload = null, string message = "", int statusCode = 200, Pagination pagination = null) { this.Code = statusCode; this.Message = message == string.Empty ? "Success" : message; this.Payload = payload; this.SentDate = sentDate; this.Pagination = pagination; } public MyCustomApiResponse(DateTime sentDate, object payload = null, Pagination pagination = null) { this.Code = 200; this.Message = "Success"; this.Payload = payload; this.SentDate = sentDate; this.Pagination = pagination; } public MyCustomApiResponse(object payload) { this.Code = 200; this.Payload = payload; } } public class Pagination { public int TotalItemsCount { get; set; } public int PageSize { get; set; } public int CurrentPage { get; set; } public int TotalPages { get; set; } }

通过如下代码片段进行测试结果

public async Task<MyCustomApiResponse> Get() { var data = await _personManager.GetAllAsync(); return new MyCustomApiResponse(DateTime.UtcNow, data, new Pagination { CurrentPage = 1, PageSize = 10, TotalItemsCount = 200, TotalPages = 20 }); }

运行后会得到如下影响格式

{ "code": 200, "message": "Success", "payload": [ { "id": 1, "firstName": "Vianne", "lastName": "Durano", "dateOfBirth": "2018-11-01T00:00:00" }, { "id": 2, "firstName": "Vynn", "lastName": "Durano", "dateOfBirth": "2018-11-01T00:00:00" }, { "id": 3, "firstName": "Mitch", "lastName": "Durano", "dateOfBirth": "2018-11-01T00:00:00" } ], "sentDate": "2019-10-17T02:26:32.5242353Z", "pagination": { "totalItemsCount": 200, "pageSize": 10, "currentPage": 1, "totalPages": 20 } }

但是从这里要注意一旦我们对API响应进行自定义，那么就代表我们完全控制了要格式化数据的方式，同时丢失了默认API响应的某些选项配置。但是我们仍然可以利用ApiException()方法引发用户定义的错误消息

如下所示

[Route("{id:long}")] [HttpPut] public async Task<MyCustomApiResponse> Put(long id, [FromBody] PersonDTO dto) { if (ModelState.IsValid) { try { var person = _mapper.Map<Person>(dto); person.ID = id; if (await _personManager.UpdateAsync(person)) return new MyCustomApiResponse(DateTime.UtcNow, true, "Update successful."); else throw new ApiException($"Record with id: {id} does not exist.", 400); } catch (Exception ex) { _logger.Log(LogLevel.Error, ex, "Error when trying to update with ID:{@ID}", id); throw; } } else throw new ApiException(ModelState.AllErrors()); }

现在当进行模型验证时，可以获得默认响应格式

{ "isError": true, "responseException": { "exceptionMessage": "Request responded with validation error(s). Please correct the specified validation errors and try again.", "validationErrors": [ { "field": "FirstName", "message": "'First Name' must not be empty." } ] } }

Reference

https://github.com/proudmonkey/AutoWrapper

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