Lidarr/NzbDrone.Core/MediaCover/CoverAlreadyExistsSpecifica...

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using NLog;
using NzbDrone.Common;
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using NzbDrone.Common.Serializer;
namespace NzbDrone.Core.MediaCover
{
public interface ICoverExistsSpecification
{
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bool AlreadyExists(string url, string path);
}
public class CoverAlreadyExistsSpecification : ICoverExistsSpecification
{
private readonly IDiskProvider _diskProvider;
private readonly IHttpProvider _httpProvider;
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private readonly Logger _logger;
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public CoverAlreadyExistsSpecification(IDiskProvider diskProvider, IHttpProvider httpProvider, Logger logger)
{
_diskProvider = diskProvider;
_httpProvider = httpProvider;
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_logger = logger;
}
public bool AlreadyExists(string url, string path)
{
if (!_diskProvider.FileExists(path))
{
return false;
}
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var headers = _httpProvider.GetHeader(url);
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string sizeString;
if (headers.TryGetValue(HttpProvider.CONTENT_LENGTH_HEADER, out sizeString))
{
int size;
int.TryParse(sizeString, out size);
var fileSize = _diskProvider.GetFileSize(path);
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return fileSize == size;
}
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_logger.Warn("Couldn't find content-length header {0}", headers.ToJson());
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return false;
}
}
}