decide which mirror to choose locally and display result

closes #3904

OpenRA.Mods.RA/Widgets/Logic/DownloadPackagesLogic.cs

@@ -26,6 +26,7 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 		ProgressBarWidget progressBar;
 		LabelWidget statusLabel;
 		Action afterInstall;
+		string mirror;
 
 		[ObjectCreator.UseCtor]
 		public DownloadPackagesLogic(Widget widget, Dictionary<string, string> installData, Action afterInstall)
@@ -42,14 +43,15 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 
 		void ShowDownloadDialog()
 		{
-			statusLabel.GetText = () => "Initializing...";
+			statusLabel.GetText = () => "Fetching list of mirrors...";
 			progressBar.Indeterminate = true;
+
 			var retryButton = panel.Get<ButtonWidget>("RETRY_BUTTON");
 			retryButton.IsVisible = () => false;
 
 			var cancelButton = panel.Get<ButtonWidget>("CANCEL_BUTTON");
 
-			// Save the package to a temp file
+			var mirrorsFile = new string[] { Platform.SupportDir, "Content", Game.modData.Manifest.Mod.Id, "mirrors.txt" }.Aggregate(Path.Combine);
 			var file = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
 			var dest = new string[] { Platform.SupportDir, "Content", Game.modData.Manifest.Mod.Id }.Aggregate(Path.Combine);
 
@@ -57,7 +59,9 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 			{
 				progressBar.Indeterminate = false;
 				progressBar.Percentage = i.ProgressPercentage;
-				statusLabel.GetText = () => "Downloading {1}/{2} kB ({0}%)".F(i.ProgressPercentage, i.BytesReceived / 1024, i.TotalBytesToReceive / 1024);
+				statusLabel.GetText = () => "Downloading from {3} {1}/{2} kB ({0}%)".F(i.ProgressPercentage,
+					i.BytesReceived / 1024, i.TotalBytesToReceive / 1024, 
+					mirror != null ? new Uri(mirror).Host : "unknown host");
 			};
 
 			Action<string> onExtractProgress = s =>
@@ -100,10 +104,41 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 				}
 			};
 
-			var dl = new Download(installData["PackageURL"], file, onDownloadProgress, onDownloadComplete);
+			Action<AsyncCompletedEventArgs, bool> onFetchMirrorsComplete = (i, cancelled) =>
+			{
+				progressBar.Indeterminate = true;
 
+				if (i.Error != null)
+				{
+					onError(Download.FormatErrorMessage(i.Error));
+					return;
+				}
+				else if (cancelled)
+				{
+					onError("Download cancelled");
+					return;
+				}
+
+				var mirrorList = new List<string>();
+				using (var r = new StreamReader(mirrorsFile))
+				{
+					string line;
+					while ((line = r.ReadLine()) != null)
+						if (!string.IsNullOrEmpty(line))
+							mirrorList.Add(line);
+				}
+				mirror = mirrorList.Random(new OpenRA.Thirdparty.Random());
+
+				// Save the package to a temp file
+				var dl = new Download(mirror, file, onDownloadProgress, onDownloadComplete);
 				cancelButton.OnClick = () => { dl.Cancel(); Ui.CloseWindow(); };
 				retryButton.OnClick = () => { dl.Cancel(); ShowDownloadDialog(); };
+			};
+
+			// Get the list of mirrors
+			var updateMirrors = new Download(installData["PackageMirrorList"], mirrorsFile, onDownloadProgress, onFetchMirrorsComplete);
+			cancelButton.OnClick = () => { updateMirrors.Cancel(); Ui.CloseWindow(); };
+			retryButton.OnClick = () => { updateMirrors.Cancel(); ShowDownloadDialog(); };
 		}
 	}
 }

mods/cnc/mod.yaml

@@ -130,7 +130,7 @@ LoadScreen: CncLoadScreen
 	FilesToExtract: speech.mix, tempicnh.mix, transit.mix
 	InstallerBackgroundWidget: INSTALL_BACKGROUND
 	TestFiles: conquer.mix, desert.mix, general.mix, sounds.mix, speech.mix, temperat.mix, tempicnh.mix, winter.mix
-	PackageURL: http://open-ra.org/download/content/cnc-packages
+	PackageMirrorList: http://open-ra.org/packages/cnc-mirrors.txt
 
 ServerTraits:
 	LobbyCommands

mods/d2k/mod.yaml

@@ -113,7 +113,7 @@ LoadScreen: DefaultLoadScreen
 	InstallerMenuWidget: INSTALL_PANEL
 # TODO: check if DATA.R8 is at 1.03 patch level with 4840 frames
 	TestFiles: BLOXBASE.R8, BLOXBAT.R8, BLOXBGBS.R8, BLOXICE.R8, BLOXTREE.R8, BLOXWAST.R8, DATA.R8, SOUND.RS
-	PackageURL: http://open-ra.org/download/content/d2k-103-packages
+	PackageMirrorList: http://open-ra.org/packages/d2k-103-mirrors.txt
 	Text: Filling Crates..., Breeding Sandworms...
 
 ServerTraits:

mods/ra/mod.yaml

@@ -129,7 +129,7 @@ LoadScreen: DefaultLoadScreen
 	Image: mods/ra/uibits/loadscreen.png
 	InstallerMenuWidget: INSTALL_PANEL
 	TestFiles: allies.mix, conquer.mix, general.mix, interior.mix, redalert.mix, russian.mix, scores.mix, snow.mix, sounds.mix, temperat.mix
-	PackageURL: http://open-ra.org/download/content/ra-packages
+	PackageMirrorList: http://open-ra.org/packages/ra-mirrors.txt
 	Text: Filling Crates..., Charging Capacitors..., Reticulating Splines..., Planting Trees..., Building Bridges..., Aging Empires..., Compiling EVA..., Constructing Pylons..., Activating Skynet..., Splitting Atoms...
 
 ServerTraits:

mods/ts/mod.yaml

@@ -151,7 +151,7 @@ LoadScreen: DefaultLoadScreen
 	Image: mods/ts/uibits/loadscreen.png
 	InstallerMenuWidget: INSTALL_PANEL
 	TestFiles: cache.mix, conquer.mix, isosnow.mix, isotemp.mix, local.mix, sidec01.mix, sidec02.mix, sno.mix, snow.mix, sounds.mix, speech01.mix, tem.mix, temperat.mix
-	PackageURL: http://open-ra.org/download/content/ts-packages
+	PackageMirrorList: http://open-ra.org/packages/ts-mirrors.txt
 	Text: Updating EVA installation..., Changing perspective...
 
 ServerTraits: