public async Task Process() { Sources = _accessor.HttpContext.Request.Form["source[]"]; if (Sources == null || Sources.Length == 0) { await WriteJson(new { state = "参数错误:没有指定抓取源" }); return; } //Crawlers = Sources.Select( x => _crawler.Fetch(x)).ToArray(); //var temp = Sources.Select(async x => // { // return await _crawler.Fetch(x); // }); //foreach (var item in temp) //{ // this.Crawlers.Add(await item); //} await WriteJson(new { state = "SUCCESS", //list = temp.Select(async x => { // var item = await x; // return new // { // state = item.State, // source = item.SourceUrl, // url = item.ServerUrl // }; //}), list = Sources.Select(async x => { var item = await _crawler.Fetch(x); return(new { state = item.State, source = item.SourceUrl, url = item.ServerUrl }); }), }); }