/// <summary>
/// 清理Response缓存
/// </summary>
/// <param name="httpResponse"></param>
/// <param name="res"></param>
protected static Task ResponseJsonError(HttpResponse httpResponse, IResp res)
{
httpResponse.Clear();
httpResponse.Headers.Remove("ETag");
httpResponse.Headers["Pragma"] = "no-cache";
httpResponse.Headers["Expires"] = "-1";
httpResponse.Headers["Cache-Control"] = "no-cache";
httpResponse.ContentType = "application/json; charset=utf-8";
httpResponse.StatusCode = (int)HttpStatusCode.OK;
return(httpResponse.WriteAsync($"{{\"ret\":{res.ret},\"msg\":\"{res.msg}\"}}"));
}
/// <summary>
/// 处理方法
/// </summary>
/// <param name="context"></param>
/// <returns></returns>
public override async Task Invoke(HttpContext context)
{
Exception error = null;
IResp errorResp = null;
// 需要在此初始化，否则中间件依次退出后此值为空，下方异常无法捕获APP信息
var appInfo = context.InitialCoreAppIdentity();
try
{
await _next.Invoke(context);
if (context.Response.StatusCode == (int)HttpStatusCode.NotFound)
{
await ExceptionResponse(context, appInfo, new Resp(RespTypes.OperateObjectNull, "当前请求资源不存在！"));
}
return;
}
catch (RespException resEx)
{
errorResp = resEx;
error = resEx;
}
catch (Exception ex)
{
error = ex;
}
var code = LogHelper.Error(string.Concat("请求地址:", context.Request.Path, "错误信息：", error.Message, "详细信息：", error.StackTrace),
nameof(CoreExceptionMiddleware));
#if DEBUG
if (error != null)
{
throw error;
}
#endif
var res = errorResp ?? new Resp(SysRespTypes.AppError, $"当前服务异常（{ error.Message}）！");
await ExceptionResponse(context, appInfo, res);
}
/// <summary>
/// 异常响应处理
/// </summary>
/// <param name="context"></param>
/// <param name="appInfo"></param>
/// <param name="res"></param>
/// <returns></returns>
private static Task ExceptionResponse(HttpContext context, AppIdentity appInfo, IResp res)
{
var url = InterReqHelper.GetErrorPage(context, appInfo, res);
if (string.IsNullOrEmpty(url))
{
return(ResponseJsonError(context.Response, res));
}
context.Response.Redirect(url);
return(Task.CompletedTask);
}
internal static string GetErrorPage(HttpContext context, AppIdentity appInfo, IResp res)
{
if (appInfo.source_mode != AppSourceMode.Browser || context.Request.IsFetchApi())
{
return(string.Empty);
}
if (CheckIfErrorUrl(context.Request.Path.ToString()))
{
return(string.Empty);
}
var errUrl = Option?.ErrorPage;
return(string.IsNullOrEmpty(errUrl)
? string.Empty
: string.Concat(errUrl, "?ret=", res.ret, "&msg=", errUrl.SafeEscapeUriDataString()));
}
