public async Task <IEnumerable <JryCover> > QueryByUriAsync(JryCoverType coverType, string uri)
{
var filter = Builders <JryCover> .Filter;
return(await(await this.Collection.FindAsync(
filter.And(
filter.Eq(t => t.CoverType, coverType),
filter.Eq(t => t.Uri, uri))
))
.ToListAsync());
}
private async Task <string> TryGetCoverUrlFromDoubanIdAsync(JryCoverType type, string doubanId)
{
DoubanEntity json = null;
switch (type)
{
case JryCoverType.Video:
json = await DoubanHelper.TryGetMovieInfoAsync(doubanId);
break;
case JryCoverType.Artist:
json = await DoubanHelper.TryGetArtistInfoAsync(doubanId);
break;
default:
throw new ArgumentOutOfRangeException("type", type, null);
}
return(json != null?json.GetLargeImageUrl() : null);
}
public async Task <string> GetCoverFromDoubanIdAsync(JryCoverType type, string doubanId)
{
if (String.IsNullOrWhiteSpace(doubanId))
{
throw new ArgumentException();
}
return(await Task.Run(async() =>
{
foreach (var jryCover in await this.Source.QueryByDoubanIdAsync(type, doubanId))
{
return jryCover.Id;
}
var url = await this.TryGetCoverUrlFromDoubanIdAsync(type, doubanId);
if (url == null)
{
return null;
}
lock (this._syncRoot)
{
if (this._writingDoubanId.Contains(doubanId))
{
return null;
}
this._writingDoubanId.Add(doubanId);
this.Log(JasilyLogger.LoggerMode.Debug, String.Format("added thread for cover. total [{0}].", this._writingDoubanId.Count));
}
var request = WebRequest.CreateHttp(url);
var result = await request.GetResultAsBytesAsync();
if (result.IsSuccess)
{
var cover = new JryCover();
cover.BuildMetaData();
cover.CoverSourceType = JryCoverSourceType.Douban;
cover.CoverType = JryCoverType.Video;
cover.DoubanId = doubanId;
cover.Uri = url;
cover.BinaryData = result.Result;
await this.InsertAsync(cover);
lock (this._syncRoot)
{
this._writingDoubanId.Remove(doubanId);
}
return cover.Id;
}
else
{
lock (this._syncRoot)
{
this._writingDoubanId.Remove(doubanId);
this.Log(JasilyLogger.LoggerMode.Debug, String.Format("finish thread for cover. total [{0}].", this._writingDoubanId.Count));
}
return null;
}
}));
}
