static async Task DownloadImages()
{
Func <DownloadModel, Task <string> > asyncTask = async model =>
{
using (WebClient webClient = new WebClient())
{
Console.WriteLine($"下载文件{model.Url}");
string fileName = Guid.NewGuid().ToString().Replace("-", "") + ".jpg";
string path = Path.Combine(model.alias, fileName);
try
{
string savePath = Path.Combine(BasePath, model.alias);
if (!Directory.Exists(savePath))
{
Directory.CreateDirectory(savePath);
}
await webClient.DownloadFileTaskAsync(model.Url, Path.Combine(savePath, fileName));
Console.WriteLine($"下载完成，输出路径{path}");
return(path);
}
catch (Exception e)
{
Console.WriteLine($"下载出错:{e.Message}");
return("");
}
}
};
Func <DownloadModel, Task> saveRecordAsync = async model =>
{
Console.WriteLine("准备保存地址到数据库");
using (SpiderContext db = new SpiderContext())
{
var article = await db.WeChatArticles.FirstOrDefaultAsync(c => c.Id == model.Id);
if (null != article)
{
article.Download = true;
article.LocalPath = model.Path;
await db.SaveChangesAsync();
}
}
Console.WriteLine("保存完成");
};
foreach (var item in downloadModels)
{
item.Path = await asyncTask(item);
if (!string.IsNullOrWhiteSpace(item.Path))
{
await saveRecordAsync(item);
}
Console.WriteLine($"在此休眠{SleepTime / 1000}秒");
Thread.Sleep(SleepTime);
}
}
public async Task InsertClientSgin(long clientId)
{
using var db = new SpiderContext();
db.TaskStartSigns.Add(new TaskStartSign
{
Id = IdWorkContext.ID_WORKER.NextId(),
ClientId = clientId,
StartDate = DateTime.Now,
RunStatus = true
});
await db.SaveChangesAsync();
}
public async Task <int> SetClientSignOut(long clientId)
{
using var spiderContext = new SpiderContext();
var sign = await spiderContext.TaskStartSigns.FirstOrDefaultAsync(c => c.ClientId == clientId);
if (null == sign)
{
throw new NullReferenceException("未找到实体");
}
sign.RunStatus = false;
return(await spiderContext.SaveChangesAsync());
}
public async Task <int> SetAccountSpiderStop(long accountId)
{
using var spiderContext = new SpiderContext();
var account = await spiderContext.WeChatAccounts.FirstOrDefaultAsync(c => c.Id == accountId);
if (null == account)
{
throw new NullReferenceException("未找到公众号实体");
}
account.TaskStartSign = null;
return(await spiderContext.SaveChangesAsync());
}
public async Task UpdateClientSgin(long clientId)
{
using var spiderContext = new SpiderContext();
var sign = await spiderContext.TaskStartSigns.FirstOrDefaultAsync(c => c.ClientId == clientId);
if (null != sign)
{
sign.StartDate = DateTime.Now;
await spiderContext.SaveChangesAsync();
}
else
{
throw new NullReferenceException("未找到实体");
}
}
public async Task <int> InsertArticleByList(List <WeChatArticle> list, long accountId)
{
using var db = new SpiderContext();
var account = await db.WeChatAccounts.FirstOrDefaultAsync(c => c.Id == accountId);
if (null == account)
{
throw new NullReferenceException("未找到公众号实体");
}
list.ForEach(item =>
{
item.WeChatAccount = account;
db.WeChatArticles.Add(item);
});
return(await db.SaveChangesAsync());
}
public async Task <int> UpdateWeChatAccountAsync(WeChatAccount model)
{
using var spiderContext = new SpiderContext();
spiderContext.WeChatAccounts.Update(model);
return(await spiderContext.SaveChangesAsync());
}