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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.Torznab
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{
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public class TorznabRssParser : TorrentRssParser
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{
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public const string ns = "{http://torznab.com/schemas/2015/feed}";
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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) throw new ApiKeyException("Invalid API key");
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if (!indexerResponse.Request.Url.FullUri.Contains("apikey=") && errorMessage == "Missing parameter")
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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 TorznabException("Torznab error detected: {0}", errorMessage);
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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 = item.Element("enclosure").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} instead of application/x-bittorrent", 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 = TryGetTorznabAttribute(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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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 override string GetInfoHash(XElement item)
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{
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return TryGetTorznabAttribute(item, "infohash");
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}
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protected override string GetMagnetUrl(XElement item)
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{
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return TryGetTorznabAttribute(item, "magneturl");
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}
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protected override int? GetSeeders(XElement item)
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{
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var seeders = TryGetTorznabAttribute(item, "seeders");
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if (seeders.IsNotNullOrWhiteSpace())
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{
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return int.Parse(seeders);
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}
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return base.GetSeeders(item);
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}
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protected override int? GetPeers(XElement item)
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{
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var peers = TryGetTorznabAttribute(item, "peers");
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if (peers.IsNotNullOrWhiteSpace())
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{
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return int.Parse(peers);
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}
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var seeders = TryGetTorznabAttribute(item, "seeders");
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var leechers = TryGetTorznabAttribute(item, "leechers");
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if (seeders.IsNotNullOrWhiteSpace() && leechers.IsNotNullOrWhiteSpace())
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{
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return int.Parse(seeders) + int.Parse(leechers);
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}
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return base.GetPeers(item);
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}
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protected string TryGetTorznabAttribute(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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