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proxy remote images through the server when previewing

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This commit is contained in:
Luke Pulverenti
2013-11-04 16:50:37 -05:00
parent 403534f80e
commit ea9fddd5ca
6 changed files with 108 additions and 8 deletions
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99
MediaBrowser.Api/RemoteImageService.cs
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@@ -1,4 +1,11 @@
using MediaBrowser.Controller.Dto;
using System;
using System.IO;
using MediaBrowser.Common.Configuration;
using MediaBrowser.Common.Extensions;
using MediaBrowser.Common.IO;
using MediaBrowser.Common.Net;
using MediaBrowser.Controller;
using MediaBrowser.Controller.Dto;
using MediaBrowser.Controller.Providers;
using MediaBrowser.Model.Entities;
using MediaBrowser.Model.Providers;
@@ -62,16 +69,31 @@ namespace MediaBrowser.Api
public string ImageUrl { get; set; }
}
[Route("/Images/Remote", "GET")]
[Api(Description = "Gets a remote image")]
public class GetRemoteImage
{
[ApiMember(Name = "Url", Description = "The image url", IsRequired = true, DataType = "string", ParameterType = "query", Verb = "GET")]
public string Url { get; set; }
}
public class RemoteImageService : BaseApiService
{
private readonly IProviderManager _providerManager;
private readonly IServerApplicationPaths _appPaths;
private readonly IHttpClient _httpClient;
private readonly IFileSystem _fileSystem;
private readonly IDtoService _dtoService;
public RemoteImageService(IProviderManager providerManager, IDtoService dtoService)
public RemoteImageService(IProviderManager providerManager, IDtoService dtoService, IServerApplicationPaths appPaths, IHttpClient httpClient, IFileSystem fileSystem)
{
_providerManager = providerManager;
_dtoService = dtoService;
_appPaths = appPaths;
_httpClient = httpClient;
_fileSystem = fileSystem;
}
public object Get(GetRemoteImages request)
@@ -128,5 +150,78 @@ namespace MediaBrowser.Api
await item.RefreshMetadata(CancellationToken.None, forceSave: true, allowSlowProviders: false)
.ConfigureAwait(false);
}
public object Get(GetRemoteImage request)
{
var task = GetRemoteImage(request);
return task.Result;
}
private async Task<object> GetRemoteImage(GetRemoteImage request)
{
var urlHash = request.Url.GetMD5();
var pointerCachePath = GetFullCachePath(urlHash.ToString());
string contentPath;
try
{
using (var reader = new StreamReader(pointerCachePath))
{
contentPath = await reader.ReadToEndAsync().ConfigureAwait(false);
}
if (File.Exists(contentPath))
{
return ToStaticFileResult(contentPath);
}
}
catch (FileNotFoundException)
{
// Means the file isn't cached yet
}
await DownloadImage(request.Url, urlHash, pointerCachePath).ConfigureAwait(false);
// Read the pointer file again
using (var reader = new StreamReader(pointerCachePath))
{
contentPath = await reader.ReadToEndAsync().ConfigureAwait(false);
}
return ToStaticFileResult(contentPath);
}
private async Task DownloadImage(string url, Guid urlHash, string pointerCachePath)
{
var result = await _httpClient.GetResponse(new HttpRequestOptions
{
Url = url
}).ConfigureAwait(false);
var ext = result.ContentType.Split('/').Last();
var fullCachePath = GetFullCachePath(urlHash + "." + ext);
using (var stream = result.Content)
{
using (var filestream = _fileSystem.GetFileStream(fullCachePath, FileMode.Create, FileAccess.Write, FileShare.Read, true))
{
await stream.CopyToAsync(filestream).ConfigureAwait(false);
}
}
using (var writer = new StreamWriter(pointerCachePath))
{
await writer.WriteAsync(fullCachePath).ConfigureAwait(false);
}
}
private string GetFullCachePath(string filename)
{
return Path.Combine(_appPaths.DownloadedImagesDataPath, filename.Substring(0, 1), filename);
}
}
}