From f97d16acad300f596c2ab4841553e4d8b7ff0116 Mon Sep 17 00:00:00 2001
From: Mike Perham <mperham@gmail.com>
Date: Thu, 11 Aug 2022 07:22:29 -0700
Subject: [PATCH] Rack 2/3 compat: header keys must be lower-case

---
 lib/sidekiq/web.rb             |  2 +-
 lib/sidekiq/web/action.rb      |  6 +++---
 lib/sidekiq/web/application.rb | 10 +++++-----
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/lib/sidekiq/web.rb b/lib/sidekiq/web.rb
index 60e26bba..656c7b29 100644
--- a/lib/sidekiq/web.rb
+++ b/lib/sidekiq/web.rb
@@ -148,7 +148,7 @@ module Sidekiq
       m = middlewares
 
       rules = []
-      rules = [[:all, {"Cache-Control" => "public, max-age=86400"}]] unless ENV["SIDEKIQ_WEB_TESTING"]
+      rules = [[:all, {"cache-control" => "public, max-age=86400"}]] unless ENV["SIDEKIQ_WEB_TESTING"]
 
       ::Rack::Builder.new do
         use Rack::Static, urls: ["/stylesheets", "/images", "/javascripts"],
diff --git a/lib/sidekiq/web/action.rb b/lib/sidekiq/web/action.rb
index 48133685..2d456429 100644
--- a/lib/sidekiq/web/action.rb
+++ b/lib/sidekiq/web/action.rb
@@ -15,11 +15,11 @@ module Sidekiq
     end
 
     def halt(res)
-      throw :halt, [res, {"Content-Type" => "text/plain"}, [res.to_s]]
+      throw :halt, [res, {"content-type" => "text/plain"}, [res.to_s]]
     end
 
     def redirect(location)
-      throw :halt, [302, {"Location" => "#{request.base_url}#{location}"}, []]
+      throw :halt, [302, {"location" => "#{request.base_url}#{location}"}, []]
     end
 
     def params
@@ -68,7 +68,7 @@ module Sidekiq
     end
 
     def json(payload)
-      [200, {"Content-Type" => "application/json", "Cache-Control" => "private, no-store"}, [Sidekiq.dump_json(payload)]]
+      [200, {"content-type" => "application/json", "cache-control" => "private, no-store"}, [Sidekiq.dump_json(payload)]]
     end
 
     def initialize(env, block)
diff --git a/lib/sidekiq/web/application.rb b/lib/sidekiq/web/application.rb
index 1ffd3484..274cf790 100644
--- a/lib/sidekiq/web/application.rb
+++ b/lib/sidekiq/web/application.rb
@@ -312,7 +312,7 @@ module Sidekiq
 
     def call(env)
       action = self.class.match(env)
-      return [404, {"Content-Type" => "text/plain", "X-Cascade" => "pass"}, ["Not Found"]] unless action
+      return [404, {"content-type" => "text/plain", "x-cascade" => "pass"}, ["Not Found"]] unless action
 
       app = @klass
       resp = catch(:halt) do
@@ -329,10 +329,10 @@ module Sidekiq
       else
         # rendered content goes here
         headers = {
-          "Content-Type" => "text/html",
-          "Cache-Control" => "private, no-store",
-          "Content-Language" => action.locale,
-          "Content-Security-Policy" => CSP_HEADER
+          "content-type" => "text/html",
+          "cache-control" => "private, no-store",
+          "content-language" => action.locale,
+          "content-security-policy" => CSP_HEADER
         }
         # we'll let Rack calculate Content-Length for us.
         [200, headers, [resp]]