feat(metadata): download EPL metadata from our own server (#101)

Author: notwindstone

CMakeLists.txt

@@ -217,6 +217,12 @@ set(Launcher_BUILD_ARTIFACT "" CACHE STRING "Artifact name to help the updater i
 # The metadata server
 set(Launcher_META_URL "https://meta.prismlauncher.org/v1/" CACHE STRING "URL to fetch Launcher's meta files from.")
 
+# Ely.by metadata URL
+set(Launcher_EPL_META_URL "https://freesmlauncher.org/metadata/epl_metadata.json" CACHE STRING "URL to fetch Ely authlibs metadata")
+
+# Ely.by metadata fallback URL
+set(Launcher_EPL_META_FALLBACK_URL "https://raw.githubusercontent.com/FreesmTeam/FreesmLauncher/refs/heads/develop/epl_metadata.json" CACHE STRING "Fallback URL to fetch Ely authlibs metadata")
+
 # Imgur API Client ID
 set(Launcher_IMGUR_CLIENT_ID "5b97b0713fba4a3" CACHE STRING "Client ID you can get from Imgur when you register an application")
 

buildconfig/BuildConfig.cpp.in

@@ -125,6 +125,8 @@ Config::Config()
     ELYBY_CLIENT_ID = "@Launcher_ELYBY_CLIENT_ID@";
     FLAME_API_KEY = "@Launcher_CURSEFORGE_API_KEY@";
     META_URL = "@Launcher_META_URL@";
+    EPL_META_URL = "@Launcher_EPL_META_URL@";
+    EPL_META_FALLBACK_URL = "@Launcher_EPL_META_FALLBACK_URL@";
     FMLLIBS_BASE_URL = "@Launcher_FMLLIBS_BASE_URL@";
 
     GLFW_LIBRARY_NAME = "@Launcher_GLFW_LIBRARY_NAME@";

buildconfig/BuildConfig.h

@@ -172,6 +172,9 @@ class Config {
      */
     QString META_URL;
 
+    QString EPL_META_URL;
+    QString EPL_META_FALLBACK_URL;
+
     QString GLFW_LIBRARY_NAME;
     QString OPENAL_LIBRARY_NAME;
 

launcher/minecraft/launch/ApplyLibraryOverrides.cpp

@@ -1,11 +1,11 @@
 #include "ApplyLibraryOverrides.h"
-#include <launch/LaunchTask.h>
+#include "Application.h"
+#include "BuildConfig.h"
+#include "launch/LaunchTask.h"
 #include "minecraft/PackProfile.h"
 #include "net/Download.h"
 #include "net/NetJob.h"
 
-#include "Application.h"
-
 ApplyLibraryOverrides::ApplyLibraryOverrides(LaunchTask* parent, AuthSessionPtr session)
     : LaunchStep(parent), m_session(session), m_instance(m_parent->instance())
 {}
@@ -17,13 +17,13 @@ void ApplyLibraryOverrides::executeTask()
 
 void ApplyLibraryOverrides::downloadLibraryOverrideList()
 {
-    const auto libraryOverrideListUrl =
-        QUrl("https://raw.githubusercontent.com/FreesmTeam/FreesmLauncher/refs/heads/develop/epl_metadata.json");
+    const auto libraryOverrideListUrl = QUrl(m_isFirstDownloadTry ? BuildConfig.EPL_META_URL : BuildConfig.EPL_META_FALLBACK_URL);
     m_response = std::make_shared<QByteArray>();
     m_request = Net::Download::makeByteArray(libraryOverrideListUrl, m_response);
 
     m_task.reset(new NetJob("Fetch EPL metadata", APPLICATION->network()));
     m_task->addNetAction(m_request);
+    m_task->setAskRetry(false);
 
     connect(m_task.get(), &NetJob::finished, this, &ApplyLibraryOverrides::onLibraryOverrideDownloadFinished);
     connect(m_task.get(), &NetJob::aborted, this, [this] { emitFailed(tr("Aborted")); });
@@ -34,6 +34,10 @@ void ApplyLibraryOverrides::downloadLibraryOverrideList()
 void ApplyLibraryOverrides::onLibraryOverrideDownloadFinished()
 {
     if (m_request->error() != QNetworkReply::NoError) {
+        if (m_isFirstDownloadTry) {
+            m_isFirstDownloadTry = false;
+            return downloadLibraryOverrideList();
+        }
         emitFailed("Failed to download EPL metadata.");
         return;
     }

launcher/minecraft/launch/ApplyLibraryOverrides.h

@@ -38,4 +38,5 @@ class ApplyLibraryOverrides : public LaunchStep {
     std::shared_ptr<QByteArray> m_response = std::make_shared<QByteArray>();
     Net::Download::Ptr m_request;
     NetJob::Ptr m_task;
+    bool m_isFirstDownloadTry = true;
 };