Add proxy option to Twingly HTTP Client

In case we are being blocked by a domain we need to be able to use a proxy.

Author: cequele

lib/twingly/http.rb

@@ -50,10 +50,11 @@ class Client # rubocop:disable Metrics/ClassLength
       attr_accessor :logger
       attr_accessor :retryable_exceptions
 
-      def initialize(base_user_agent:, logger: default_logger, user_agent: nil)
+      def initialize(base_user_agent:, logger: default_logger, user_agent: nil, proxy: nil)
         @base_user_agent = base_user_agent
         @logger          = logger
         @user_agent      = user_agent
+        @proxy           = proxy
 
         initialize_defaults
       end
@@ -212,6 +213,7 @@ def create_http_client # rubocop:disable Metrics/MethodLength
                            max_size_bytes: @max_response_body_size_bytes
           faraday.adapter Faraday.default_adapter
           faraday.headers[:user_agent] = user_agent
+          faraday.proxy = @proxy if @proxy
         end
       end
 

spec/lib/twingly/http_spec.rb

@@ -688,6 +688,40 @@ class CustomError < StandardError; end
         end
       end
     end
+
+    fdescribe "proxy" do
+      let(:test_url) { "http://example.com" }
+
+      context "when a proxy is set" do
+        let(:proxy_url) { "http://localhost:1080" }
+        let(:proxy_client) do
+          described_class.new(
+            base_user_agent: base_user_agent,
+            logger: logger,
+            user_agent: user_agent,
+            proxy: proxy_url
+          )
+        end
+
+        before(:all) do
+          let(:toxiproxy) { Toxiproxy.new(host: "localhost", port: 8474) }
+          let(:proxy) { toxiproxy.create("proxy", listen: "localhost:1080", upstream: "https://example.com") }
+        end
+
+        after(:all) do
+          proxy.delete
+          toxiproxy.close
+        end
+
+        it "sets the proxy URL correctly in the Twingly HTTP client" do
+          allow(proxy_client).to receive(proxy).and_return(proxy_url)
+          response = proxy_client.get("https://example.com")
+
+          expect(proxy_client.proxy).to eq(proxy_url)
+          expect(response.status).to eq(200)
+        end
+      end
+    end
   end
 
   describe "#put", vcr: Fixture.put_httpbin_org do