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Merge pull request #1105 from ploughpuff/ratelimit

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Only delay making MusicBrainz request if necessary
pull/1114/head
Vasily 6 years ago committed by GitHub
parent 3d85014edc d125fbc43d
commit 11fde02035
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 43 additions and 43 deletions
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6
Emby.Server.Implementations/ApplicationHost.cs
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@ -428,6 +428,12 @@ namespace Emby.Server.Implementations
/// <value>The application user agent.</value>
public string ApplicationUserAgent => Name.Replace(' ','-') + "/" + ApplicationVersion;
/// <summary>
/// Gets the email address for use within a comment section of a user agent field.
/// Presently used to provide contact information to MusicBrainz service.
/// </summary>
public string ApplicationUserAgentAddress { get; } = "team@jellyfin.org";
private string _productName;
/// <summary>

6
MediaBrowser.Common/IApplicationHost.cs
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@ -71,6 +71,12 @@ namespace MediaBrowser.Common
/// <value>The application user agent.</value>
string ApplicationUserAgent { get; }
/// <summary>
/// Gets the email address for use within a comment section of a user agent field.
/// Presently used to provide contact information to MusicBrainz service.
/// </summary>
string ApplicationUserAgentAddress { get; }
/// <summary>
/// Gets the exports.
/// </summary>

68
MediaBrowser.Providers/Music/MusicBrainzAlbumProvider.cs
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@ -1,6 +1,6 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
@ -28,9 +28,16 @@ namespace MediaBrowser.Providers.Music
private readonly IApplicationHost _appHost;
private readonly ILogger _logger;
private readonly IJsonSerializer _json;
private Stopwatch _stopWatchMusicBrainz = new Stopwatch();
public readonly string MusicBrainzBaseUrl;
// The Jellyfin user-agent is unrestricted but source IP must not exceed
// one request per second, therefore we rate limit to avoid throttling.
// Be prudent, use a value slightly above the minimun required.
// https://musicbrainz.org/doc/XML_Web_Service/Rate_Limiting
private const long MusicBrainzQueryIntervalMs = 1050u;
public MusicBrainzAlbumProvider(
IHttpClient httpClient,
IApplicationHost appHost,
@ -45,6 +52,9 @@ namespace MediaBrowser.Providers.Music
MusicBrainzBaseUrl = configuration["MusicBrainz:BaseUrl"];
// Use a stopwatch to ensure we don't exceed the MusicBrainz rate limit
_stopWatchMusicBrainz.Start();
Current = this;
}
@ -54,8 +64,6 @@ namespace MediaBrowser.Providers.Music
var releaseGroupId = searchInfo.GetReleaseGroupId();
string url;
var isNameSearch = false;
bool forceMusicBrainzProper = false;
if (!string.IsNullOrEmpty(releaseId))
{
@ -64,7 +72,6 @@ namespace MediaBrowser.Providers.Music
else if (!string.IsNullOrEmpty(releaseGroupId))
{
url = string.Format("/ws/2/release?release-group={0}", releaseGroupId);
forceMusicBrainzProper = true;
}
else
{
@ -78,8 +85,6 @@ namespace MediaBrowser.Providers.Music
}
else
{
isNameSearch = true;
// I'm sure there is a better way but for now it resolves search for 12" Mixes
var queryName = searchInfo.Name.Replace("\"", string.Empty);
@ -91,7 +96,7 @@ namespace MediaBrowser.Providers.Music
if (!string.IsNullOrWhiteSpace(url))
{
using (var response = await GetMusicBrainzResponse(url, isNameSearch, forceMusicBrainzProper, cancellationToken).ConfigureAwait(false))
using (var response = await GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
{
using (var stream = response.Content)
{
@ -247,7 +252,7 @@ namespace MediaBrowser.Providers.Music
WebUtility.UrlEncode(albumName),
artistId);
using (var response = await GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false))
using (var response = await GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
using (var stream = response.Content)
using (var oReader = new StreamReader(stream, Encoding.UTF8))
{
@ -272,7 +277,7 @@ namespace MediaBrowser.Providers.Music
WebUtility.UrlEncode(albumName),
WebUtility.UrlEncode(artistName));
using (var response = await GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false))
using (var response = await GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
using (var stream = response.Content)
using (var oReader = new StreamReader(stream, Encoding.UTF8))
{
@ -589,7 +594,7 @@ namespace MediaBrowser.Providers.Music
{
var url = string.Format("/ws/2/release?release-group={0}", releaseGroupId);
using (var response = await GetMusicBrainzResponse(url, true, true, cancellationToken).ConfigureAwait(false))
using (var response = await GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
using (var stream = response.Content)
using (var oReader = new StreamReader(stream, Encoding.UTF8))
{
@ -625,7 +630,7 @@ namespace MediaBrowser.Providers.Music
{
var url = string.Format("/ws/2/release-group/?query=reid:{0}", releaseEntryId);
using (var response = await GetMusicBrainzResponse(url, false, cancellationToken).ConfigureAwait(false))
using (var response = await GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
using (var stream = response.Content)
using (var oReader = new StreamReader(stream, Encoding.UTF8))
{
@ -710,34 +715,29 @@ namespace MediaBrowser.Providers.Music
return null;
}
internal Task<HttpResponseInfo> GetMusicBrainzResponse(string url, bool isSearch, CancellationToken cancellationToken)
{
return GetMusicBrainzResponse(url, isSearch, false, cancellationToken);
}
/// <summary>
/// Gets the music brainz response.
/// Makes request to MusicBrainz server and awaits a response.
/// </summary>
internal async Task<HttpResponseInfo> GetMusicBrainzResponse(string url, bool isSearch, bool forceMusicBrainzProper, CancellationToken cancellationToken)
internal async Task<HttpResponseInfo> GetMusicBrainzResponse(string url, CancellationToken cancellationToken)
{
var urlInfo = new MbzUrl(MusicBrainzBaseUrl, 1000);
var throttleMs = urlInfo.throttleMs;
if (throttleMs > 0)
if (_stopWatchMusicBrainz.ElapsedMilliseconds < MusicBrainzQueryIntervalMs)
{
// MusicBrainz is extremely adamant about limiting to one request per second
_logger.LogDebug("Throttling MusicBrainz by {0}ms", throttleMs.ToString(CultureInfo.InvariantCulture));
await Task.Delay(throttleMs, cancellationToken).ConfigureAwait(false);
var delayMs = MusicBrainzQueryIntervalMs - _stopWatchMusicBrainz.ElapsedMilliseconds;
await Task.Delay((int)delayMs, cancellationToken).ConfigureAwait(false);
}
url = urlInfo.url.TrimEnd('/') + url;
_logger.LogDebug("MusicBrainz time since previous request: {0}ms", _stopWatchMusicBrainz.ElapsedMilliseconds);
_stopWatchMusicBrainz.Restart();
var options = new HttpRequestOptions
{
Url = url,
Url = MusicBrainzBaseUrl.TrimEnd('/') + url,
CancellationToken = cancellationToken,
UserAgent = _appHost.ApplicationUserAgent,
BufferContent = throttleMs > 0
// MusicBrainz request a contact email address is supplied, as comment, in user agent field:
// https://musicbrainz.org/doc/XML_Web_Service/Rate_Limiting#User-Agent
UserAgent = string.Format("{0} ( {1} )", _appHost.ApplicationUserAgent, _appHost.ApplicationUserAgentAddress),
BufferContent = false
};
return await _httpClient.SendAsync(options, "GET").ConfigureAwait(false);
@ -749,17 +749,5 @@ namespace MediaBrowser.Providers.Music
{
throw new NotImplementedException();
}
internal class MbzUrl
{
internal MbzUrl(string url, int throttleMs)
{
this.url = url;
this.throttleMs = throttleMs;
}
public string url { get; set; }
public int throttleMs { get; set; }
}
}
}

6
MediaBrowser.Providers/Music/MusicBrainzArtistProvider.cs
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@ -31,7 +31,7 @@ namespace MediaBrowser.Providers.Music
{
var url = string.Format("/ws/2/artist/?query=arid:{0}", musicBrainzId);
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, false, cancellationToken).ConfigureAwait(false))
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
{
using (var stream = response.Content)
{
@ -46,7 +46,7 @@ namespace MediaBrowser.Providers.Music
var url = string.Format("/ws/2/artist/?query=\"{0}\"&dismax=true", UrlEncode(nameToSearch));
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false))
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
{
using (var stream = response.Content)
{
@ -64,7 +64,7 @@ namespace MediaBrowser.Providers.Music
// Try again using the search with accent characters url
url = string.Format("/ws/2/artist/?query=artistaccent:\"{0}\"", UrlEncode(nameToSearch));
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, true, cancellationToken).ConfigureAwait(false))
using (var response = await MusicBrainzAlbumProvider.Current.GetMusicBrainzResponse(url, cancellationToken).ConfigureAwait(false))
{
using (var stream = response.Content)
{

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