/// <summary>
/// 处理规范化结果
/// </summary>
/// <param name="context"></param>
/// <param name="next"></param>
/// <returns></returns>
public async Task OnActionExecutionAsync(ActionExecutingContext context, ActionExecutionDelegate next)
{
// 执行 Action 并获取结果
var actionExecutedContext = await next();
// 如果出现异常，则不会进入该过滤器
if (actionExecutedContext.Exception != null)
{
return;
}
// 获取控制器信息
var actionDescriptor = context.ActionDescriptor as ControllerActionDescriptor;
// 判断是否支持 MVC 规范化处理
if (!UnifyContext.CheckSupportMvcController(context.HttpContext, actionDescriptor, out _))
{
return;
}
// 判断是否跳过规范化处理
if (UnifyContext.CheckSucceededNonUnify(actionDescriptor.MethodInfo, out var unifyResult))
{
return;
}
// 处理 BadRequestObjectResult 类型规范化处理
if (actionExecutedContext.Result is BadRequestObjectResult badRequestObjectResult)
{
// 解析验证消息
var validationMetadata = ValidatorContext.GetValidationMetadata(badRequestObjectResult.Value);
var result = unifyResult.OnValidateFailed(context, validationMetadata);
if (result != null)
{
actionExecutedContext.Result = result;
}
// 打印验证失败信息
App.PrintToMiniProfiler("validation", "Failed", $"Validation Failed:\r\n{validationMetadata.Message}", true);
}
else
{
IActionResult result = default;
// 检查是否是有效的结果（可进行规范化的结果）
if (UnifyContext.CheckVaildResult(actionExecutedContext.Result, out var data))
{
result = unifyResult.OnSucceeded(actionExecutedContext, data);
}
// 如果是不能规范化的结果类型，则跳过
if (result == null)
{
return;
}
actionExecutedContext.Result = result;
}
}
/// <summary>
/// 异常拦截
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public async Task OnExceptionAsync(ExceptionContext context)
{
// 解析异常处理服务，实现自定义异常额外操作，如记录日志等
var globalExceptionHandler = context.HttpContext.RequestServices.GetService <IGlobalExceptionHandler>();
if (globalExceptionHandler != null)
{
await globalExceptionHandler.OnExceptionAsync(context);
}
// 如果异常在其他地方被标记了处理，那么这里不再处理
if (context.ExceptionHandled)
{
return;
}
// 获取控制器信息
var actionDescriptor = context.ActionDescriptor as ControllerActionDescriptor;
// 解析异常信息
var exceptionMetadata = UnifyContext.GetExceptionMetadata(context);
// 判断是否是验证异常
var isValidationException = context.Exception is AppFriendlyException friendlyException && friendlyException.ValidationException;
// 判断是否跳过规范化结果，如果是，则只处理为友好异常消息
if (UnifyContext.CheckFailedNonUnify(actionDescriptor.MethodInfo, out var unifyResult))
{
// 如果是验证异常，返回 400
if (isValidationException)
{
context.Result = new BadRequestResult();
}
else
{
// 返回友好异常
context.Result = new ContentResult()
{
Content = exceptionMetadata.Errors.ToString(),
StatusCode = exceptionMetadata.StatusCode
};
}
}
else
{
// 判断是否支持 MVC 规范化处理
if (!UnifyContext.CheckSupportMvcController(context.HttpContext, actionDescriptor, out _))
{
return;
}
// 执行规范化异常处理
context.Result = unifyResult.OnException(context, exceptionMetadata);
}
// 判断异常消息是否是验证异常（比如数据验证异常，业务抛出异常）
if (isValidationException)
{
// 解析验证消息
var validationMetadata = ValidatorContext.GetValidationMetadata((context.Exception as AppFriendlyException).ErrorMessage);
App.PrintToMiniProfiler("Validation", "Failed", $"Validation Failed:\r\n{validationMetadata.Message}", true);
}
else
{
PrintToMiniProfiler(context.Exception);
}
}
