Net Core中使用中间件方式
首先,创建一个中间件ExceptionMiddleware
public class ExceptionMiddleware
{
private readonly RequestDelegate next;
private IHostingEnvironment environment;
public ExceptionMiddleware(RequestDelegate next,IHostingEnvironment environment)
{
this.next = next;
this.environment = environment;
}
public async Task Invoke(HttpContext context)
{
try
{
await next.Invoke(context);
var features = context.Features;
}
catch (Exception e)
{
await HandleException(context, e);
}
}
private async Task HandleException(HttpContext context, Exception e)
{
context.Response.StatusCode = 500;
context.Response.ContentType = "text/json;charset=utf-8;";
string error = "";
if (environment.IsDevelopment())
{
var json = new { message = e.Message};
error = JsonConvert.SerializeObject(json);
}
else
error = "抱歉,出错了";
await context.Response.WriteAsync(error);
}
}
创建 HandleException(HttpContext context, Exception e) 处理异常,判断是 Development 环境下,输出详细的错误信息,非 Development 环境仅提示调用者“抱歉,出错了”,同时使用 NLog 组件将日志写入硬盘;同样,在 Startup.cs 中将 ExceptionMiddleware 加入管道中
//ExceptionMiddleware 加入管道
app.UseMiddleware<ExceptionMiddleware>();
启动调试,结果如下
{"message":"Attempted to divide by zero."}
统一封装冷异常处理方式和消息格式,对前端也很友好。
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本文为智客工坊「楠木大叔」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。