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rework news downloading

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This commit is contained in:
Luke Pulverenti 2014-01-18 23:25:01 -05:00
parent 18a9720857
commit d2cae40128
8 changed files with 182 additions and 92 deletions
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4
MediaBrowser.Api/NewsService.cs
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@ -6,7 +6,7 @@ using ServiceStack;
namespace MediaBrowser.Api
{
[Route("/News/Product", "GET")]
[Api(Description = "Gets search hints based on a search term")]
[Api(Description = "Gets the latest product news.")]
public class GetProductNews : IReturn<QueryResult<NewsItem>>
{
/// <summary>
@ -40,7 +40,7 @@ namespace MediaBrowser.Api
StartIndex = request.StartIndex,
Limit = request.Limit
}).Result;
});
return ToOptimizedResult(result);
}

5
MediaBrowser.Controller/News/INewsService.cs
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@ -1,6 +1,5 @@
using MediaBrowser.Model.News;
using MediaBrowser.Model.Querying;
using System.Threading.Tasks;
namespace MediaBrowser.Controller.News
{
@ -13,7 +12,7 @@ namespace MediaBrowser.Controller.News
/// Gets the product news.
/// </summary>
/// <param name="query">The query.</param>
/// <returns>IEnumerable{NewsItem}.</returns>
Task<QueryResult<NewsItem>> GetProductNews(NewsQuery query);
/// <returns>QueryResult{NewsItem}.</returns>
QueryResult<NewsItem> GetProductNews(NewsQuery query);
}
}

1
MediaBrowser.Model/News/NewsItem.cs
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@ -16,6 +16,7 @@ namespace MediaBrowser.Model.News
public string Title { get; set; }
public string Link { get; set; }
public string Description { get; set; }
public string DescriptionHtml { get; set; }
public string Guid { get; set; }
public DateTime Date { get; set; }
}

26
MediaBrowser.Server.Implementations/LiveTv/LiveTvManager.cs
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@ -229,6 +229,12 @@ namespace MediaBrowser.Server.Implementations.LiveTv
return result;
}
catch (Exception ex)
{
_logger.ErrorException("Error getting recording stream", ex);
throw;
}
finally
{
_liveStreamSemaphore.Release();
@ -245,6 +251,8 @@ namespace MediaBrowser.Server.Implementations.LiveTv
var channel = GetInternalChannel(id);
_logger.Info("Opening channel stream from {0}, external channel Id: {1}", service.Name, channel.ChannelInfo.Id);
var result = await service.GetChannelStream(channel.ChannelInfo.Id, cancellationToken).ConfigureAwait(false);
if (!string.IsNullOrEmpty(result.Id))
@ -254,6 +262,12 @@ namespace MediaBrowser.Server.Implementations.LiveTv
return result;
}
catch (Exception ex)
{
_logger.ErrorException("Error getting channel stream", ex);
throw;
}
finally
{
_liveStreamSemaphore.Release();
@ -1261,9 +1275,19 @@ namespace MediaBrowser.Server.Implementations.LiveTv
{
await _liveStreamSemaphore.WaitAsync(cancellationToken).ConfigureAwait(false);
var service = ActiveService;
_logger.Info("Closing live stream from {0}, stream Id: {1}", service.Name, id);
try
{
await ActiveService.CloseLiveStream(id, cancellationToken).ConfigureAwait(false);
await service.CloseLiveStream(id, cancellationToken).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error closing live stream", ex);
throw;
}
finally
{

1
MediaBrowser.Server.Implementations/MediaBrowser.Server.Implementations.csproj
View File

@ -173,6 +173,7 @@
<Compile Include="LiveTv\RefreshChannelsScheduledTask.cs" />
<Compile Include="Localization\LocalizationManager.cs" />
<Compile Include="MediaEncoder\MediaEncoder.cs" />
<Compile Include="News\NewsEntryPoint.cs" />
<Compile Include="News\NewsService.cs" />
<Compile Include="Persistence\SqliteChapterRepository.cs" />
<Compile Include="Persistence\SqliteExtensions.cs" />

127
MediaBrowser.Server.Implementations/News/NewsEntryPoint.cs Normal file
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@ -0,0 +1,127 @@
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.Plugins;
using MediaBrowser.Model.Logging;
using MediaBrowser.Model.News;
using MediaBrowser.Model.Serialization;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Xml;
namespace MediaBrowser.Server.Implementations.News
{
public class NewsEntryPoint : IServerEntryPoint
{
private Timer _timer;
private readonly IHttpClient _httpClient;
private readonly IApplicationPaths _appPaths;
private readonly IFileSystem _fileSystem;
private readonly ILogger _logger;
private readonly IJsonSerializer _json;
private readonly TimeSpan _frequency = TimeSpan.FromHours(24);
public NewsEntryPoint(IHttpClient httpClient, IApplicationPaths appPaths, IFileSystem fileSystem, ILogger logger, IJsonSerializer json)
{
_httpClient = httpClient;
_appPaths = appPaths;
_fileSystem = fileSystem;
_logger = logger;
_json = json;
}
public void Run()
{
_timer = new Timer(OnTimerFired, null, TimeSpan.FromMilliseconds(500), _frequency);
}
/// <summary>
/// Called when [timer fired].
/// </summary>
/// <param name="state">The state.</param>
private async void OnTimerFired(object state)
{
var path = Path.Combine(_appPaths.CachePath, "news.json");
try
{
await DownloadNews(path).ConfigureAwait(false);
}
catch (Exception ex)
{
_logger.ErrorException("Error downloading news", ex);
}
}
private async Task DownloadNews(string path)
{
var requestOptions = new HttpRequestOptions
{
Url = "http://mediabrowser3.com/community/index.php?/blog/rss/1-media-browser-developers-blog",
Progress = new Progress<double>()
};
using (var stream = await _httpClient.Get(requestOptions).ConfigureAwait(false))
{
var doc = new XmlDocument();
doc.Load(stream);
var news = ParseRssItems(doc).ToList();
_json.SerializeToFile(news, path);
}
}
private IEnumerable<NewsItem> ParseRssItems(XmlDocument xmlDoc)
{
var nodes = xmlDoc.SelectNodes("rss/channel/item");
if (nodes != null)
{
foreach (XmlNode node in nodes)
{
var newsItem = new NewsItem();
newsItem.Title = ParseDocElements(node, "title");
newsItem.DescriptionHtml = ParseDocElements(node, "description");
newsItem.Description = newsItem.DescriptionHtml.StripHtml();
newsItem.Link = ParseDocElements(node, "link");
var date = ParseDocElements(node, "pubDate");
DateTime parsedDate;
if (DateTime.TryParse(date, out parsedDate))
{
newsItem.Date = parsedDate;
}
yield return newsItem;
}
}
}
private string ParseDocElements(XmlNode parent, string xPath)
{
var node = parent.SelectSingleNode(xPath);
return node != null ? node.InnerText : string.Empty;
}
public void Dispose()
{
if (_timer != null)
{
_timer.Dispose();
_timer = null;
}
}
}
}

108
MediaBrowser.Server.Implementations/News/NewsService.cs
View File

@ -1,38 +1,46 @@
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.IO;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller.News;
using MediaBrowser.Model.News;
using MediaBrowser.Model.Querying;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Xml;
using MediaBrowser.Model.Serialization;
namespace MediaBrowser.Server.Implementations.News
{
public class NewsService : INewsService
{
private readonly IApplicationPaths _appPaths;
private readonly IFileSystem _fileSystem;
private readonly IHttpClient _httpClient;
private readonly IJsonSerializer _json;
public NewsService(IApplicationPaths appPaths, IFileSystem fileSystem, IHttpClient httpClient)
public NewsService(IApplicationPaths appPaths, IJsonSerializer json)
{
_appPaths = appPaths;
_fileSystem = fileSystem;
_httpClient = httpClient;
_json = json;
}
public async Task<QueryResult<NewsItem>> GetProductNews(NewsQuery query)
public QueryResult<NewsItem> GetProductNews(NewsQuery query)
{
var path = Path.Combine(_appPaths.CachePath, "news.xml");
try
{
return GetProductNewsInternal(query);
}
catch (FileNotFoundException)
{
// No biggie
return new QueryResult<NewsItem>
{
Items = new NewsItem[] { }
};
}
}
await EnsureNewsFile(path).ConfigureAwait(false);
private QueryResult<NewsItem> GetProductNewsInternal(NewsQuery query)
{
var path = Path.Combine(_appPaths.CachePath, "news.json");
var items = GetNewsItems(path);
var items = GetNewsItems(path).OrderByDescending(i => i.Date);
var itemsArray = items.ToArray();
var count = itemsArray.Length;
@ -56,77 +64,7 @@ namespace MediaBrowser.Server.Implementations.News
private IEnumerable<NewsItem> GetNewsItems(string path)
{
var xmlDoc = new XmlDocument();
xmlDoc.Load(path);
return ParseRssItems(xmlDoc);
}
private IEnumerable<NewsItem> ParseRssItems(XmlDocument xmlDoc)
{
var nodes = xmlDoc.SelectNodes("rss/channel/item");
if (nodes == null)
{
yield return null;
}
foreach (XmlNode node in nodes)
{
var newsItem = new NewsItem();
newsItem.Title = ParseDocElements(node, "title");
newsItem.Description = ParseDocElements(node, "description");
newsItem.Link = ParseDocElements(node, "link");
var date = ParseDocElements(node, "pubDate");
DateTime parsedDate;
if (DateTime.TryParse(date, out parsedDate))
{
newsItem.Date = parsedDate;
}
yield return newsItem;
}
}
private string ParseDocElements(XmlNode parent, string xPath)
{
var node = parent.SelectSingleNode(xPath);
return node != null ? node.InnerText : "Unresolvable";
}
/// <summary>
/// Ensures the news file.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>Task.</returns>
private async Task EnsureNewsFile(string path)
{
var info = _fileSystem.GetFileSystemInfo(path);
if (!info.Exists || (DateTime.UtcNow - _fileSystem.GetLastWriteTimeUtc(info)).TotalHours > 12)
{
var requestOptions = new HttpRequestOptions
{
Url = "http://mediabrowser3.com/community/index.php?/blog/rss/1-media-browser-developers-blog",
Progress = new Progress<double>()
};
using (var stream = await _httpClient.Get(requestOptions).ConfigureAwait(false))
{
using (var fileStream = _fileSystem.GetFileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read, true))
{
await stream.CopyToAsync(fileStream).ConfigureAwait(false);
}
}
}
return _json.DeserializeFromFile<List<NewsItem>>(path);
}
}
}

2
MediaBrowser.ServerApplication/ApplicationHost.cs
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@ -285,7 +285,7 @@ namespace MediaBrowser.ServerApplication
DtoService = new DtoService(Logger, LibraryManager, UserManager, UserDataManager, ItemRepository, ImageProcessor);
RegisterSingleInstance(DtoService);
var newsService = new Server.Implementations.News.NewsService(ApplicationPaths, FileSystemManager, HttpClient);
var newsService = new Server.Implementations.News.NewsService(ApplicationPaths, JsonSerializer);
RegisterSingleInstance<INewsService>(newsService);
progress.Report(15);