FIX: Rescue and warn when error is encountered in DiscourseIpInfo.mmdb_download (#28134)

Since switching to Maxmind permalinks to download the databases in
7079698cdf, we have received multiple
reports about rebuilds failing as `maxminddb:refresh` runs during
the rebuilds and failing to download the databases cases the rebuilds to
fail.

Downloading Maxmind databases should not sit in the critical rebuild
path but since we are close to the Discourse 3.3 release, we have opted
to just rescue all errors encountered when downloading the databases.

In the near future after the Discourse 3.3 release, we will be looking
at moving the downloading of maxmind databases out of the rebuild path.

lib/discourse_ip_info.rb

@@ -55,7 +55,6 @@ class DiscourseIpInfo
         end
       end
 
-    begin
     gz_file =
       FileHelper.download(
         url,
@@ -71,15 +70,12 @@ class DiscourseIpInfo
     dir = "#{Dir.tmpdir}/#{SecureRandom.hex}"
 
     Discourse::Utils.execute_command("mkdir", "-p", dir)
-
     Discourse::Utils.execute_command("cp", gz_file.path, "#{dir}/#{filename}")
-
     Discourse::Utils.execute_command("tar", "-xzvf", "#{dir}/#{filename}", chdir: dir)
 
     Dir["#{dir}/**/*.mmdb"].each { |f| FileUtils.mv(f, mmdb_path(name)) }
   rescue => e
-      Discourse.warn_exception(e, message: "MaxMind database download failed.")
-    end
+    Discourse.warn_exception(e, message: "MaxMind database #{name} download failed.")
   ensure
     FileUtils.rm_r(dir, force: true) if dir
     gz_file&.close!

spec/lib/discourse_ip_info_spec.rb

@@ -60,5 +60,28 @@ RSpec.describe DiscourseIpInfo do
 
       described_class.mmdb_download("GeoLite2-City")
     end
+
+    it "should not throw an error and instead log the exception when database file fails to download" do
+      original_logger = Rails.logger
+      Rails.logger = fake_logger = FakeLogger.new
+
+      global_setting :maxmind_license_key, "license_key"
+      global_setting :maxmind_account_id, "account_id"
+
+      stub_request(
+        :get,
+        "https://download.maxmind.com/geoip/databases/GeoLite2-City/download?suffix=tar.gz",
+      ).with(basic_auth: %w[account_id license_key]).to_return(status: 500, body: nil, headers: {})
+
+      expect do described_class.mmdb_download("GeoLite2-City") end.not_to raise_error
+
+      expect(fake_logger.warnings.length).to eq(1)
+
+      expect(fake_logger.warnings.first).to include(
+        "MaxMind database GeoLite2-City download failed. 500 Error",
+      )
+    ensure
+      Rails.logger = original_logger
+    end
   end
 end