fix: remove non UTF-8 chars from webhook response bodies before savin…

…g the logs to the (UTF-8 encoded) database table

lib/pact_broker/domain/webhook_request.rb

@@ -123,7 +123,14 @@ def log_response response, execution_logger
           execution_logger.info "#{header.split("-").collect(&:capitalize).join('-')}: #{response[header]}"
         end
         logger.debug "body=#{response.body}"
-        execution_logger.info response.body
+        safe_body = nil
+        if response.body
+          safe_body = response.body.encode('UTF-8', 'binary', invalid: :replace, undef: :replace, replace: '')
+          if response.body != safe_body
+            execution_logger.debug "Note that invalid UTF-8 byte sequences were removed from response body before saving the logs"
+          end
+        end
+        execution_logger.info safe_body
       end
 
       def log_completion_message options, execution_logger, success

spec/lib/pact_broker/domain/webhook_request_spec.rb

@@ -268,6 +268,25 @@ module Domain
           end
         end
 
+        context "when the response body contains a non UTF-8 character" do
+          let!(:http_request) do
+            stub_request(:post, "http://example.org/hook").
+              to_return(:status => 200, :body => "This has some \xC2 invalid chars")
+          end
+
+          it "removes the non UTF-8 characters before saving the logs so they don't blow up the database" do
+            result = subject.execute(pact, options)
+            expect(result.logs).to include "This has some  invalid chars"
+          end
+
+          it "logs that it has cleaned the string to the execution logger" do
+            logger = double("logger").as_null_object
+            allow(Logger).to receive(:new).and_return(logger)
+            expect(logger).to receive(:debug).with(/Note that invalid UTF-8 byte sequences were removed/)
+            subject.execute(pact, options)
+          end
+        end
+
         context "when an error occurs executing the request" do
 
           class WebhookTestError < StandardError; end