Fix case sensitivity on response headers

lib/httplog/adapters/ethon.rb

@@ -47,8 +47,8 @@ def httplog_add_callback
           @on_complete.unshift -> (*) do
             # Not sure where the actual status code is stored - so let's
             # extract it from the response header.
-            encoding = response_headers.scan(/Content-Encoding: (\S+)/).flatten.first
-            content_type = response_headers.scan(/Content-Type: (\S+(; charset=\S+)?)/).flatten.first
+            encoding = response_headers.scan(/Content-Encoding: (\S+)/i).flatten.first
+            content_type = response_headers.scan(/Content-Type: (\S+(; charset=\S+)?)/i).flatten.first
 
             # Hard to believe that Ethon wouldn't parse out the headers into
             # an array; probably overlooked it. Anyway, let's do it ourselves:

lib/httplog/adapters/httpclient.rb

@@ -19,6 +19,7 @@ def do_get_block(req, proxy, conn, &block)
       request_uri = req.header.request_uri
       if HttpLog.url_approved?(request_uri)
         res = conn.pop
+        headers = res.headers.transform_keys { |key| key.downcase }
 
         HttpLog.call(
           method: req.header.request_method,
@@ -27,10 +28,10 @@ def do_get_block(req, proxy, conn, &block)
           request_headers: req.headers,
           response_code: res.status_code,
           response_body: res.body,
-          response_headers: res.headers,
+          response_headers: headers,
           benchmark: bm,
-          encoding: res.headers['Content-Encoding'],
-          content_type: res.headers['Content-Type'],
+          encoding: headers['content-encoding'],
+          content_type: headers['content-type'],
           mask_body: HttpLog.masked_body_url?(request_uri)
         )
         conn.push(res)

lib/httplog/adapters/patron.rb

@@ -10,17 +10,19 @@ def request(action_name, url, headers, options = {})
         end
 
         if HttpLog.url_approved?(url)
+          normalized_headers = @response.headers.transform_keys { |key| key.downcase }
+
           HttpLog.call(
             method: action_name,
             url: url,
             request_body: options[:data],
             request_headers: headers,
             response_code: @response.status,
             response_body: @response.body,
-            response_headers: @response.headers,
+            response_headers: normalized_headers,
             benchmark: bm,
-            encoding: @response.headers['Content-Encoding'],
-            content_type: @response.headers['Content-Type'],
+            encoding: normalized_headers['content-encoding'],
+            content_type: normalized_headers['content-type'],
             mask_body: HttpLog.masked_body_url?(url)
           )
         end

spec/lib/http_log_spec.rb

@@ -111,6 +111,13 @@ def configure
             expect(response_string).to eq(adapter.expected_full_response_body)
           end
 
+          context 'with lowercase headers' do
+            let(:path) { '/index.html' }
+            let(:data) { 'downcase=true' }
+
+            it_behaves_like 'logs expected response'
+          end
+
           context 'with gzip encoding' do
             let(:path) { '/index.html.gz' }
             let(:data) { nil }

spec/support/test_server.rb

@@ -28,6 +28,9 @@ def call(env)
           headers['Content-Type'] = 'text/html; charset=UTF-8' if path =~ /utf8/
           headers['Content-Type'] = 'application/json' if path =~ /json/
           headers['Content-Encoding'] = 'gzip' if File.extname(file) == '.gz'
+
+          headers.transform_keys! { |key| key.downcase } if params['downcase']
+
           [200, headers, File.binread(file)]
         else
           [404, { 'Content-Type' => 'text/plain' }, 'file not found']