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230 lines
7.4 KiB
230 lines
7.4 KiB
using System;
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using System.Collections.Generic;
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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.Languages;
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using NzbDrone.Core.Parser;
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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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PreferredEnclosureMimeTypes = UsenetEnclosureMimeTypes;
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UseEnclosureUrl = true;
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}
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public static void CheckError(XDocument xdoc, IndexerResponse indexerResponse)
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{
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var error = xdoc.Descendants("error").FirstOrDefault();
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if (error == null)
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{
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return;
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}
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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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throw new ApiKeyException(errorMessage);
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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 bool PreProcess(IndexerResponse indexerResponse)
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{
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if (indexerResponse.HttpResponse.HasHttpError &&
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(indexerResponse.HttpResponse.Headers.ContentType == null || !indexerResponse.HttpResponse.Headers.ContentType.Contains("xml")))
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{
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base.PreProcess(indexerResponse);
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}
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var xdoc = LoadXmlDocument(indexerResponse);
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CheckError(xdoc, indexerResponse);
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return true;
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}
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protected override bool PostProcess(IndexerResponse indexerResponse, List<XElement> items, List<ReleaseInfo> releases)
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{
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var enclosureTypes = items.SelectMany(GetEnclosures).Select(v => v.Type).Distinct().ToArray();
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if (enclosureTypes.Any() && enclosureTypes.Intersect(PreferredEnclosureMimeTypes).Empty())
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{
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if (enclosureTypes.Intersect(TorrentEnclosureMimeTypes).Any())
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{
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_logger.Warn("{0} does not contain {1}, found {2}, did you intend to add a Torznab indexer?", indexerResponse.Request.Url, NzbEnclosureMimeType, enclosureTypes[0]);
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}
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else
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{
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_logger.Warn("{1} does not contain {1}, found {2}.", indexerResponse.Request.Url, NzbEnclosureMimeType, enclosureTypes[0]);
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}
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}
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return true;
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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.Author = GetAuthor(item);
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releaseInfo.Book = GetBook(item);
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return 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 List<Language> GetLanguages(XElement item)
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{
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var languages = TryGetMultipleNewznabAttributes(item, "language");
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var results = new List<Language>();
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// Try to find <language> elements for some indexers that suck at following the rules.
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if (languages.Count == 0)
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{
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languages = item.Elements("language").Select(e => e.Value).ToList();
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}
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foreach (var language in languages)
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{
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var mappedLanguage = IsoLanguages.FindByName(language)?.Language ?? null;
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if (mappedLanguage != null)
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{
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results.Add(mappedLanguage);
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}
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}
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return results;
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}
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protected override long GetSize(XElement item)
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{
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var sizeString = TryGetNewznabAttribute(item, "size");
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if (!sizeString.IsNullOrWhiteSpace() && long.TryParse(sizeString, out var 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 List<int> GetCategories(XElement item)
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{
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var values = item.Elements(ns + "attr")
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.Where(e => e.Attribute("name").Value.Equals("category", StringComparison.OrdinalIgnoreCase) &&
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e.Attribute("value")?.Value != null)
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.Select(e => e.Attribute("value").Value);
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var cats = new List<int>();
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foreach (var value in values)
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{
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if (int.TryParse(value, out var cat))
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{
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cats.Add(cat);
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}
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}
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return cats;
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}
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protected virtual string GetAuthor(XElement item)
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{
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var authorString = TryGetNewznabAttribute(item, "author");
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if (!authorString.IsNullOrWhiteSpace())
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{
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return authorString;
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}
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return "";
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}
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protected virtual string GetBook(XElement item)
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{
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var bookString = TryGetNewznabAttribute(item, "booktitle");
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if (!bookString.IsNullOrWhiteSpace())
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{
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return bookString;
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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 attrElement = item.Elements(ns + "attr").FirstOrDefault(e => e.Attribute("name").Value.Equals(key, StringComparison.OrdinalIgnoreCase));
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if (attrElement != null)
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{
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var attrValue = attrElement.Attribute("value");
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if (attrValue != null)
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{
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return attrValue.Value;
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}
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}
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return defaultValue;
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}
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protected List<string> TryGetMultipleNewznabAttributes(XElement item, string key)
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{
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var attrElements = item.Elements(ns + "attr").Where(e => e.Attribute("name").Value.Equals(key, StringComparison.OrdinalIgnoreCase));
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var results = new List<string>();
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foreach (var element in attrElements)
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{
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var attrValue = element.Attribute("value");
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if (attrValue != null)
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{
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results.Add(attrValue.Value);
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}
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}
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return results;
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}
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}
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}
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