Lowercase response headers

The latest rack 3.0 (unreleased) does not accept uppercase headers.
See rack/rack#1592 for more details.
refs:
- rack/rack#1812
- rails/sprockets#744

extensions/chrome/js/background.js

@@ -84,10 +84,10 @@ function initHttpListener() {
   function onResponse(details) {
     var headers = getHeaders(details);
     var sessionId;
-    if (sessionId = headers['X-Web-Console-Session-Id']) {
+    if (sessionId = headers['x-web-console-session-id']) {
       sessions[details.tabId] = {
         sessionId: sessionId,
-        mountPoint: headers['X-Web-Console-Mount-Point'],
+        mountPoint: headers['x-web-console-mount-point'],
         remoteHost: details.url.match(/([^:]+:\/\/[^\/]+)\/?/)[1]
       };
     }

lib/web_console/injector.rb

@@ -13,10 +13,10 @@ def initialize(body, headers)
     end
 
     def inject(content)
-      # Set Content-Length header to the size of the current body
+      # Set content-length header to the size of the current body
       # + the extra content. Otherwise the response will be truncated.
-      if @headers["Content-Length"]
-        @headers["Content-Length"] = (@body.bytesize + content.bytesize).to_s
+      if @headers["content-length"]
+        @headers["content-length"] = (@body.bytesize + content.bytesize).to_s
       end
 
       [

lib/web_console/middleware.rb

@@ -28,8 +28,8 @@ def call(env)
         status, headers, body = call_app(env)
 
         if (session = Session.from(Thread.current)) && acceptable_content_type?(headers)
-          headers["X-Web-Console-Session-Id"] = session.id
-          headers["X-Web-Console-Mount-Point"] = mount_point
+          headers["x-web-console-session-id"] = session.id
+          headers["x-web-console-mount-point"] = mount_point
 
           template = Template.new(env, session)
           body, headers = Injector.new(body, headers).inject(template.render("index"))
@@ -52,12 +52,12 @@ def call(env)
     private
 
       def acceptable_content_type?(headers)
-        headers["Content-Type"].to_s.include?("html")
+        headers["content-type"].to_s.include?("html")
       end
 
       def json_response(opts = {})
         status  = opts.fetch(:status, 200)
-        headers = { "Content-Type" => "application/json; charset = utf-8" }
+        headers = { "content-type" => "application/json; charset = utf-8" }
         body    = yield.to_json
 
         [ status, headers, [ body ] ]

lib/web_console/templates/console.js.erb

@@ -935,8 +935,8 @@ REPLConsole.request = function request(method, url, params, callback) {
   var xhr = new REPLConsole.XMLHttpRequest();
 
   xhr.open(method, url, true);
-  xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
-  xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
+  xhr.setRequestHeader("content-type", "application/x-www-form-urlencoded");
+  xhr.setRequestHeader("x-requested-with", "XMLHttpRequest");
   xhr.send(params);
 
   xhr.onreadystatechange = function() {

lib/web_console/testing/fake_middleware.rb

@@ -10,7 +10,7 @@ module Testing
     class FakeMiddleware
       I18n.load_path.concat(Dir[Helper.gem_root.join("lib/web_console/locales/*.yml")])
 
-      DEFAULT_HEADERS = { "Content-Type" => "application/javascript" }
+      DEFAULT_HEADERS = { "content-type" => "application/javascript" }
 
       def initialize(opts)
         @headers        = opts.fetch(:headers, DEFAULT_HEADERS)

test/templates/config.ru

@@ -15,7 +15,7 @@ end
 map "/html" do
   run WebConsole::Testing::FakeMiddleware.new(
     req_path_regex: %r{^/html/(.*)},
-    headers: {"Content-Type" => "text/html"},
+    headers: {"content-type" => "text/html"},
     view_path: TEST_ROOT.join("html"),
   )
 end
@@ -42,19 +42,19 @@ map "/templates" do
 end
 
 map "/mock/repl_sessions/result" do
-  headers = { 'Content-Type' => 'application/json' }
+  headers = { 'content-type' => 'application/json' }
   body = [ { output: '=> "fake-result"\n', context: [ [ :something, :somewhat, :somewhere ] ] }.to_json ]
   run lambda { |env| [ 200, headers, body ] }
 end
 
 map "/mock/repl_sessions/error" do
-  headers = { 'Content-Type' => 'application/json' }
+  headers = { 'content-type' => 'application/json' }
   body = [ { output: 'fake-error-message' }.to_json ]
   run lambda { |env| [ 400, headers, body ] }
 end
 
 map "/mock/repl_sessions/error.txt" do
-  headers = { 'Content-Type' => 'plain/text' }
+  headers = { 'content-type' => 'plain/text' }
   body = [ 'error message' ]
   run lambda { |env| [ 400, headers, body ] }
 end

test/web_console/helper_test.rb

@@ -20,7 +20,7 @@ def status
         end
 
         def headers
-          { "Content-Type" => "text/html; charset=utf-8" }
+          { "content-type" => "text/html; charset=utf-8" }
         end
 
         def body

test/web_console/injector_test.rb

@@ -28,11 +28,11 @@ class InjectorTest < ActiveSupport::TestCase
       assert_equal [ [ "foobar" ], {} ], Injector.new(body, {}).inject("bar")
     end
 
-    test "updates the Content-Length header" do
+    test "updates the content-length header" do
       body = [ "foo" ]
-      headers = { "Content-Length" => 3 }
+      headers = { "content-length" => 3 }
 
-      assert_equal [ [ "foobar" ], { "Content-Length" => "6" } ], Injector.new(body, headers).inject("bar")
+      assert_equal [ [ "foobar" ], { "content-length" => "6" } ], Injector.new(body, headers).inject("bar")
     end
   end
 end

test/web_console/middleware_test.rb

@@ -35,8 +35,8 @@ def status
 
         def headers
           Hash.new.tap do |header_hash|
-            header_hash["Content-Type"] = "#{@response_content_type}; charset=utf-8" unless @response_content_type.nil?
-            header_hash["Content-Length"] = @response_content_length unless @response_content_length.nil?
+            header_hash["content-type"] = "#{@response_content_type}; charset=utf-8" unless @response_content_type.nil?
+            header_hash["content-length"] = @response_content_length unless @response_content_length.nil?
           end
         end
     end
@@ -84,13 +84,13 @@ def headers
       assert_select "#console"
     end
 
-    test "sets correct Content-Length header" do
+    test "sets correct content-length header" do
       Thread.current[:__web_console_binding] = binding
       @app = Middleware.new(Application.new(response_content_length: 7))
 
       get "/", params: nil
 
-      assert_equal(response.body.size, response.headers["Content-Length"].to_i)
+      assert_equal(response.body.size, response.headers["content-length"].to_i)
     end
 
     test "it closes original body if rendering console" do
@@ -121,12 +121,12 @@ def headers
       assert_select "#console", 0
     end
 
-    test "returns X-Web-Console-Session-Id as response header" do
+    test "returns x-web-console-session-id as response header" do
       Thread.current[:__web_console_binding] = binding
 
       get "/", params: nil
 
-      session_id = response.headers["X-Web-Console-Session-Id"]
+      session_id = response.headers["x-web-console-session-id"]
 
       assert_not Session.find(session_id).nil?
     end