feat: Support for Puma 6 and Rack 3 (#152)

.toys/ci.rb

@@ -14,7 +14,7 @@
 
 desc "Run CI checks"
 
-TESTS = ["unit", "rubocop", "yardoc", "build", "examples", "conformance"]
+TESTS = ["unit", "dependencies", "rubocop", "yardoc", "build", "examples", "conformance"]
 
 flag :only
 TESTS.each do |name|
@@ -26,26 +26,68 @@
 
 def handle_result result
   if result.success?
-    puts "** #{result.name} passed\n\n", :green, :bold
+    puts "** Passed: #{result.name}\n\n", :green, :bold
   else
-    puts "** CI terminated: #{result.name} failed!", :red, :bold
-    exit 1
+    puts "** Failed: #{result.name}\n\n", :red, :bold
+    @errors << result.name
   end
 end
 
 def run
+  @errors = []
   ::Dir.chdir context_directory
   TESTS.each do |name|
     key = "test_#{name}".to_sym
     set key, !only if get(key).nil?
   end
-  exec ["toys", "test"], name: "Unit tests" if test_unit
-  exec ["toys", "rubocop"], name: "Style checker" if test_rubocop
-  exec ["toys", "yardoc"], name: "Docs generation" if test_yardoc
-  exec ["toys", "build"], name: "Gem build" if test_build
+  exec_separate_tool ["test"], name: "Unit tests" if test_unit
+  exec_separate_tool ["ci", "deps-matrix"], name: "Dependency matrix tests" if test_dependencies
+  exec_separate_tool ["rubocop"], name: "Style checker" if test_rubocop
+  exec_separate_tool ["yardoc"], name: "Docs generation" if test_yardoc
+  exec_separate_tool ["build"], name: "Gem build" if test_build
   ::Dir.foreach "examples" do |dir|
     next if dir =~ /^\.+$/
-    exec ["toys", "test"], name: "Tests for #{dir} example", chdir: ::File.join("examples", dir)
+    exec_separate_tool ["test"], name: "Tests for #{dir} example", chdir: ::File.join("examples", dir)
   end if test_examples
-  exec ["toys", "conformance"], name: "Conformance tests" if test_conformance
+  exec_separate_tool ["conformance"], name: "Conformance tests" if test_conformance
+  @errors.each do |err|
+    puts "Failed: #{err}", :red, :bold
+  end
+  exit 1 unless @errors.empty?
+end
+
+tool "deps-matrix" do
+  static :puma_versions, ["4.0", "5.0", "6.0"]
+  static :rack_versions, ["2.1", "3.0"]
+
+  include :exec, result_callback: :handle_result
+  include :terminal
+
+  def handle_result result
+    if result.success?
+      puts "** Passed: #{result.name}\n\n", :green, :bold
+    else
+      puts "** Failed: #{result.name}\n\n", :red, :bold
+      @errors << result.name
+    end
+  end
+
+  def run
+    @errors = []
+    ::Dir.chdir context_directory
+    puma_versions.each do |puma_version|
+      rack_versions.each do |rack_version|
+        name = "Puma #{puma_version} / Rack #{rack_version}"
+        env = {
+          "FF_DEPENDENCY_TEST_PUMA" => "~> #{puma_version}",
+          "FF_DEPENDENCY_TEST_RACK" => "~> #{rack_version}",
+        }
+        exec_separate_tool ["test", "test/test_server.rb"], env: env, name: name
+      end
+    end
+    @errors.each do |err|
+      puts "Failed: #{err}", :red, :bold
+    end
+    exit 1 unless @errors.empty?
+  end
 end

Gemfile

@@ -16,9 +16,11 @@ source "https://rubygems.org"
 
 gemspec
 
-gem "google-style", "~> 1.26.1"
+gem "google-style", "~> 1.26.3"
 gem "minitest", "~> 5.16"
 gem "minitest-focus", "~> 1.2"
 gem "minitest-rg", "~> 5.2"
+gem "puma", ENV["FF_DEPENDENCY_TEST_PUMA"] if ENV["FF_DEPENDENCY_TEST_PUMA"]
+gem "rack", ENV["FF_DEPENDENCY_TEST_RACK"] if ENV["FF_DEPENDENCY_TEST_RACK"]
 gem "redcarpet", "~> 3.5" unless ::RUBY_PLATFORM == "java"
 gem "yard", "~> 0.9.25"

functions_framework.gemspec

@@ -46,8 +46,8 @@ version = ::FunctionsFramework::VERSION
 
   spec.required_ruby_version = ">= 2.6.0"
   spec.add_dependency "cloud_events", ">= 0.7.0", "< 2.a"
-  spec.add_dependency "puma", ">= 4.3.0", "< 6.a"
-  spec.add_dependency "rack", "~> 2.1"
+  spec.add_dependency "puma", ">= 4.3.0", "< 7.a"
+  spec.add_dependency "rack", ">= 2.1", "< 4.a"
 
   if spec.respond_to? :metadata
     spec.metadata["changelog_uri"] =

lib/functions_framework/server.rb

@@ -82,10 +82,21 @@ def initialize function, globals
     def start
       synchronize do
         unless running?
-          @server = ::Puma::Server.new @app
-          @server.min_threads = @config.min_threads
-          @server.max_threads = @config.max_threads
-          @server.leak_stack_on_error = @config.show_error_details?
+          # Puma >= 6.0 interprets these settings from options
+          options = {
+            min_threads: @config.min_threads,
+            max_threads: @config.max_threads,
+            environment: @config.show_error_details? ? "development" : "production"
+          }
+          # Puma::Events.stdio for Puma < 6.0; otherwise nil for Puma >= 6.0
+          events = ::Puma::Events.stdio if ::Puma::Events.respond_to? :stdio
+          @server = ::Puma::Server.new @app, events, options
+          if @server.respond_to? :min_threads=
+            # Puma < 6.0 sets server attributes for these settings
+            @server.min_threads = @config.min_threads
+            @server.max_threads = @config.max_threads
+            @server.leak_stack_on_error = @config.show_error_details?
+          end
           @server.binder.add_tcp_listener @config.bind_addr, @config.port
           @config.logger.info "FunctionsFramework: Serving function #{@function.name.inspect} " \
                               "on port #{@config.port}..."
@@ -377,8 +388,8 @@ def string_response string, status, content_type: nil
           content_type = "#{content_type}; charset=#{string.encoding.name.downcase}"
         end
         headers = {
-          "Content-Type"   => content_type,
-          "Content-Length" => string.bytesize
+          "content-type"   => content_type,
+          "content-length" => string.bytesize
         }
         [status, headers, [string]]
       end

lib/functions_framework/testing.rb

@@ -367,8 +367,8 @@ def build_standard_env url, headers
           ::Rack::QUERY_STRING    => url.query,
           ::Rack::SERVER_NAME     => url.host,
           ::Rack::SERVER_PORT     => url.port,
+          ::Rack::SERVER_PROTOCOL => "HTTP/1.1",
           ::Rack::RACK_URL_SCHEME => url.scheme,
-          ::Rack::RACK_VERSION    => ::Rack::VERSION,
           ::Rack::RACK_LOGGER     => ::FunctionsFramework.logger,
           ::Rack::RACK_INPUT      => ::StringIO.new,
           ::Rack::RACK_ERRORS     => ::StringIO.new

test/test_server.rb

@@ -43,15 +43,15 @@
   let(:retry_interval) { 0.5 }
   let(:app_context) { {} }
 
-  def make_basic_server function
+  def make_basic_server function, show_error_details: true
     FunctionsFramework::Server.new function, app_context do |config|
       config.min_threads = 1
       config.max_threads = 1
       config.port = port
       config.bind_addr = "127.0.0.1"
       config.rack_env = "development"
       config.logger = quiet_logger
-      config.show_error_details = true
+      config.show_error_details = show_error_details
     end
   end
 
@@ -235,7 +235,7 @@ def query_server_with_retry server
     assert_match(/あああ/, err)
   end
 
-  it "interprets exceptions" do
+  it "interprets exceptions showing error details" do
     function = FunctionsFramework::Function.new "my-func", :http do |_request|
       raise "Whoops!"
     end
@@ -245,6 +245,21 @@ def query_server_with_retry server
     end
     assert_equal "500", response.code
     assert_match(/RuntimeError: Whoops!\n\t#{__FILE__}/, response.body)
+    assert_match %r{test/test_server\.rb:}, response.body
+    assert_equal "text/plain; charset=utf-8", response["Content-Type"]
+  end
+
+  it "interprets exceptions hiding error details" do
+    function = FunctionsFramework::Function.new "my-func", :http do |_request|
+      raise "Whoops!"
+    end
+    server = make_basic_server function, show_error_details: false
+    response = query_server_with_retry server do
+      ::Net::HTTP.get_response URI("#{server_url}/")
+    end
+    assert_equal "500", response.code
+    refute_match(/Whoops/, response.body)
+    assert_equal "Unexpected internal error", response.body
     assert_equal "text/plain; charset=utf-8", response["Content-Type"]
   end