private DishListRawData GetCrawDishList()
{
// 获取需要下载列表文件
List <DishDetailsRawData> dishDetails = DishFileStore.GetByPrefix <DishDetailsRawData>("DishList", (item, objName) => item.Tag = objName);
DishListRawData data = new DishListRawData(dishDetails);
// 一次只 下一个
return(data);
}
private async Task ExecuteImp(IJobExecutionContext context)
{
//1 爬类别
DishCategoryRawData dcr = GetDishCategoryRawData();
if (dcr == null)
{
await CrawlDishCategory();
// 经过手工修改，再进入 2
return;
}
//2 爬列表
List <Task> tasks = new List <Task>();
foreach (var dcrItem in dcr)
{
if (dcrItem.NeedCrawl)
{
var task = CrawDishList(dcrItem);
tasks.Add(task);
}
}
Task.WaitAll(tasks.ToArray());
//3 爬详情
tasks.Clear();
var start = DateTime.Now;
ShowAndLog($"爬详情 start:{start}");
DishListRawData dlr = GetCrawDishList();
foreach (var dlrItem in dlr)
{
tasks.Add(CrawlDishDetails(dlrItem));
//if (UserBreaker())
//{
// // 必须全部下完，才进入 4
// return;
//}
}
Task.WaitAll(tasks.ToArray());
var end = DateTime.Now;
ShowAndLog($"爬详情 end:{end} 耗时:{end.Subtract(start).TotalMinutes}");
//4 爬img
//start = DateTime.Now;
//ShowAndLog($"爬img start:{start}");
//DishImgRawData imgs = GetDishDetails();
//ParallelOptions parallelOptions = new ParallelOptions()
//{
// MaxDegreeOfParallelism = 50,
//};
//Parallel.ForEach(imgs, parallelOptions
// , (img) =>
// {
// try
// {
// CrawlerHelper.DownloadImgAndSave(img);
// Console.Write(".");
// }
// catch(System.Net.WebException ex)
// {
// ShowAndLog($"{img.SourcrUrl}:{ex.Message}");
// Thread.Sleep(100);
// }
// }
// );
//end = DateTime.Now;
//ShowAndLog($"爬img end:{end} 耗时:{end.Subtract(start).TotalMinutes}");
}
