public async Task <string> Reload()
{
LoggerHelper logger = LoggerHelper.CreateLoggerHelper(@".\Reload");
SemaphoreSlim slim = new SemaphoreSlim(1);
/**
* 读csv
* 下载媒体
* 存csv
*/
var rootPath = @"C:\Users\www\Desktop\reload";
var files = Directory.GetFiles(rootPath, "*.csv", SearchOption.AllDirectories);
var tasks = files.AsParallel().Select(async file =>
{
logger.Log(LogLevel.Info, $"开始：{file}");
List <TwitterResultCsv> news;
//读csv
using (var reader = new StreamReader(file))
using (var csv = new CsvReader(reader))
{
news = csv.GetRecords <TwitterResultCsv>().Select(n =>
{
var url = n.MediaUrl;
if (!url.Contains("video.twimg.com"))
{
var mediaUrl = Regex.Match(url, ".*?/media/[\\w|-]+").Value;
var imgUrl = Regex.Match(url, ".*?/img/[\\w|-]+").Value;
n.MediaUrl = $"{(string.IsNullOrWhiteSpace(mediaUrl) ? imgUrl : mediaUrl)}.png?name=large";
n.MediaType = MediaTypeEnum.image;
}
else
{
n.MediaType = MediaTypeEnum.video;
}
logger.Log(LogLevel.Debug, $"文件：{file} Type：{n.MediaType.ToString()} Url1：{url} Url2：{n.MediaUrl}");
return(n);
}).ToList();
}
//保存路径
string RootPath = Path.Combine(@"C:\Users\www\Desktop\reload", DateTime.Now.ToString("yyyy-MM-dd"), "Twitter");
string CsvPath = Path.Combine(RootPath, Path.GetFileName(Path.GetDirectoryName(file)).Trim());
string ImagePath = Path.Combine(RootPath, Path.GetFileName(Path.GetDirectoryName(file)).Trim(), "images");
string VideoPath = Path.Combine(RootPath, Path.GetFileName(Path.GetDirectoryName(file)).Trim(), "videos");
FileHelper.CreateDirectories(ImagePath, VideoPath);
//下载任务
var downloadTasks = news.AsParallel().Select(async n =>
{
string savePath = n.MediaType == MediaTypeEnum.image ? ImagePath : VideoPath;
string saveType = n.MediaType == MediaTypeEnum.image ? ".png" : ".mp4";
if (System.IO.File.Exists(Path.Combine(savePath, $"{n.UrlMd5}{saveType}")))
{
logger.Log(LogLevel.Info, $"已存在，跳过：{Path.Combine(savePath, $"{n.UrlMd5}{saveType}")}");
return;
}
//下载
string Proxy;
while (true)
{
try
{
Proxy = await TorProxyHelper.Instance.RandomProxy();
break;
}
catch
{
continue;
}
}
try
{
using (HttpClientHandler handler = new HttpClientHandler()
{
Proxy = new WebProxy(Proxy)
})
using (HttpClient client = new HttpClient(handler))
{
var response = await client.GetAsync(n.MediaUrl, HttpCompletionOption.ResponseHeadersRead);
if (response.StatusCode != HttpStatusCode.OK)
{
logger.Log(LogLevel.Error, $"文件：{file} 关键词：{n.KeyWord} Url：{n.MediaUrl} Md5：{n.UrlMd5} Status：{response.StatusCode}");
return;
}
using (var fStream = System.IO.File.Create(Path.Combine(savePath, $"{n.UrlMd5}{saveType}")))
await response.Content.CopyToAsync(fStream);
}
}
catch (Exception ex)
{
logger.Log(LogLevel.Error, $"下载失败：{Path.Combine(savePath, $"{n.UrlMd5}{saveType}")}。{ex.Message}");
}
}).ToArray();
//存csv
string csvName = string.Empty;
try
{
await slim.WaitAsync();
csvName = Path.Combine(CsvPath, $"{DateTimeHelper.GetUnixTimestamp()}.csv");
using (var writer = new StreamWriter(csvName))
using (var csv = new CsvWriter(writer))
{
csv.Configuration.IgnoreReferences = true;
csv.WriteRecords(news);
}
}
catch (Exception ex)
{
logger.Log(LogLevel.Error, $"Csv保存失败：{csvName}。{ex.Message}");
}
finally
{
slim.Release();
}
await Task.WhenAll(downloadTasks);
}).ToList();
await Task.WhenAll(tasks);
return("完成");
}