fix(auto_source): respect headers from global config

helpers/auto_source.rb

@@ -24,7 +24,7 @@ def self.allowed_origins = ENV.fetch('AUTO_SOURCE_ALLOWED_ORIGINS', '')
       # @return [RSS::Rss]
       def self.build_auto_source_from_encoded_url(encoded_url)
         url = Addressable::URI.parse Base64.urlsafe_decode64(encoded_url)
-        request = SsrfFilter.get(url)
+        request = SsrfFilter.get(url, headers: LocalConfig.global.fetch(:headers, {}))
         headers = request.to_hash.transform_values(&:first)
 
         auto_source = Html2rss::AutoSource.new(url, body: request.body, headers:)

spec/html2rss/web/helpers/auto_source_spec.rb

@@ -157,10 +157,23 @@
       end
     end
 
-    let(:encoded_url) { Base64.urlsafe_encode64('https://github.com/html2rss/html2rss-web/commits/master') }
+    before do
+      allow(SsrfFilter).to receive(:get).with(any_args).and_call_original
+    end
+
+    let(:url) { 'https://github.com/html2rss/html2rss-web/commits/master' }
+    let(:encoded_url) { Base64.urlsafe_encode64(url) }
 
     it 'returns an RSS::Rss object' do
       expect(feed).to be_a(RSS::Rss)
     end
+
+    it 'sets headers in the http request' do
+      feed
+      expect(SsrfFilter).to have_received(:get).with(Addressable::URI.parse(url),
+                                                     headers: {
+                                                       'User-Agent': 'Mozilla/5.0 (Windows NT 10.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36' # rubocop:disable Layout/LineLength
+                                                     })
+    end
   end
 end