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using System;
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using System.Linq;
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using System.Xml.Linq;
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using NzbDrone.Common.Extensions;
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using NzbDrone.Core.Indexers.Exceptions;
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using NzbDrone.Core.Parser.Model;
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namespace NzbDrone.Core.Indexers.Newznab
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{
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public class NewznabRssParser : RssParser
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{
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public const string ns = "{http://www.newznab.com/DTD/2010/feeds/attributes/}";
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public NewznabRssParser()
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{
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PreferredEnclosureMimeType = "application/x-nzb";
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}
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protected override bool PreProcess(IndexerResponse indexerResponse)
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{
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var xdoc = LoadXmlDocument(indexerResponse);
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var error = xdoc.Descendants("error").FirstOrDefault();
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if (error == null) return true;
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var code = Convert.ToInt32(error.Attribute("code").Value);
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var errorMessage = error.Attribute("description").Value;
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if (code >= 100 && code <= 199)
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{
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_logger.Warn("Invalid API Key: {0}", errorMessage);
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throw new ApiKeyException("Invalid API key");
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}
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if (!indexerResponse.Request.Url.FullUri.Contains("apikey=") && (errorMessage == "Missing parameter" || errorMessage.Contains("apikey")))
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{
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throw new ApiKeyException("Indexer requires an API key");
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}
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if (errorMessage == "Request limit reached")
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{
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throw new RequestLimitReachedException("API limit reached");
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}
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throw new NewznabException(indexerResponse, errorMessage);
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}
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protected override ReleaseInfo ProcessItem(XElement item, ReleaseInfo releaseInfo)
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{
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releaseInfo = base.ProcessItem(item, releaseInfo);
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releaseInfo.Artist = GetArtist(item);
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releaseInfo.Album = GetAlbum(item);
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return releaseInfo;
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}
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protected override ReleaseInfo PostProcess(XElement item, ReleaseInfo releaseInfo)
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{
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var enclosureType = GetEnclosure(item).Attribute("type").Value;
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if (enclosureType.Contains("application/x-bittorrent"))
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{
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throw new UnsupportedFeedException("Feed contains {0}, did you intend to add a Torznab indexer?", enclosureType);
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}
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return base.PostProcess(item, releaseInfo);
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}
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protected override string GetInfoUrl(XElement item)
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{
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return ParseUrl(item.TryGetValue("comments").TrimEnd("#comments"));
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}
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protected override string GetCommentUrl(XElement item)
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{
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return ParseUrl(item.TryGetValue("comments"));
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}
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protected override long GetSize(XElement item)
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{
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long size;
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var sizeString = TryGetNewznabAttribute(item, "size");
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if (!sizeString.IsNullOrWhiteSpace() && long.TryParse(sizeString, out size))
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{
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return size;
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}
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size = GetEnclosureLength(item);
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return size;
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}
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protected override DateTime GetPublishDate(XElement item)
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{
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var dateString = TryGetNewznabAttribute(item, "usenetdate");
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if (!dateString.IsNullOrWhiteSpace())
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{
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return XElementExtensions.ParseDate(dateString);
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}
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return base.GetPublishDate(item);
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}
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protected override string GetDownloadUrl(XElement item)
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{
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var url = base.GetDownloadUrl(item);
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if (!Uri.IsWellFormedUriString(url, UriKind.Absolute))
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{
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url = ParseUrl((string)item.Element("enclosure").Attribute("url"));
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}
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return url;
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}
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protected virtual string GetArtist(XElement item)
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{
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var artistString = TryGetNewznabAttribute(item, "artist");
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if (!artistString.IsNullOrWhiteSpace())
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{
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return artistString;
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}
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return "";
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}
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protected virtual string GetAlbum(XElement item)
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{
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var albumString = TryGetNewznabAttribute(item, "album");
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if (!albumString.IsNullOrWhiteSpace())
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{
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return albumString;
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}
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return "";
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}
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protected string TryGetNewznabAttribute(XElement item, string key, string defaultValue = "")
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{
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var attr = item.Elements(ns + "attr").FirstOrDefault(e => e.Attribute("name").Value.Equals(key, StringComparison.CurrentCultureIgnoreCase));
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if (attr != null)
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{
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return attr.Attribute("value").Value;
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}
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return defaultValue;
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}
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}
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}
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