u3d: issue encountered retrieving cache.json, the unity forums reques…

…t continues to redirect to login required; using an empty map to bypass; grabbing change to use user agent: DragonBox@8e89fa0

lib/u3d/unity_versions.rb

@@ -199,9 +199,13 @@ class << self
 
         def list_available
           UI.message 'Loading Unity releases'
-          versions = @unity_forums.pagination_urls(UNITY_LINUX_DOWNLOADS).map do |page_url|
-            list_available_from_page(@unity_forums, unity_forums.page_content(page_url))
-          end.reduce({}, :merge)
+          #versions = @unity_forums.pagination_urls(UNITY_LINUX_DOWNLOADS).map do |page_url|
+          #  list_available_from_page(@unity_forums, unity_forums.page_content(page_url))
+          #end.reduce({}, :merge)
+
+          # [06/08/23] this is not working anymore, unity forums proceeds to redirect to require login page
+          # so we just use an empty map to bypass this forum check process
+          versions = {}
 
           versions_fetcher = VersionsFetcher.new(pattern: LINUX_INSTALLER)
           versions.merge!(versions_fetcher.fetch_json('linux'))

lib/u3d/utils.rb

@@ -32,6 +32,9 @@ module Utils
     # Regex to capture each part of a version string (0.0.0x0)
     CSIDL_LOCAL_APPDATA = 0x001c
     UNITY_VERSION_REGEX = /(\d+)(?:\.(\d+)(?:\.(\d+))?)?(?:(\w)(?:(\d+))?)?/
+    MOZILLA_AGENT_HEADER = {
+      'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36'
+    }.freeze
 
     class << self
       def final_url(url, redirect_limit: 10)
@@ -53,6 +56,11 @@ def page_content(url, redirect_limit: 10, request_headers: {})
 
       def follow_redirects(url, redirect_limit: 10, http_method: :get, request_headers: {}, &block)
         raise 'Too many redirections' if redirect_limit.zero?
+
+        UI.message "accessing url: #{url}"
+        # Unity blocks the default Ruby agent, use another one
+        request_headers = MOZILLA_AGENT_HEADER.merge(request_headers)
+
         response = nil
         request = nil
         uri = URI(url)