diff options
Diffstat (limited to 'actionpack')
| -rw-r--r-- | actionpack/CHANGELOG.md | 29 | ||||
| -rw-r--r-- | actionpack/lib/action_controller/metal/basic_implicit_render.rb | 2 | ||||
| -rw-r--r-- | actionpack/lib/action_controller/metal/implicit_render.rb | 91 | ||||
| -rw-r--r-- | actionpack/test/controller/mime/respond_to_test.rb | 93 | ||||
| -rw-r--r-- | actionpack/test/controller/render_test.rb | 25 | ||||
| -rw-r--r-- | actionpack/test/fixtures/implicit_render_test/empty_action_with_mobile_variant.html+mobile.erb | 1 | ||||
| -rw-r--r-- | actionpack/test/fixtures/implicit_render_test/empty_action_with_template.html.erb | 1 | ||||
| -rw-r--r-- | actionpack/test/fixtures/implicit_render_test/some_action_2.html+zomg.erb | 1 | ||||
| -rw-r--r-- | actionpack/test/fixtures/respond_to/variant_with_implicit_template_rendering.html+mobile.erb (renamed from actionpack/test/fixtures/respond_to/variant_with_implicit_rendering.html+mobile.erb) | 0 |
9 files changed, 190 insertions, 53 deletions
diff --git a/actionpack/CHANGELOG.md b/actionpack/CHANGELOG.md index da96aef98b..5b762a8f17 100644 --- a/actionpack/CHANGELOG.md +++ b/actionpack/CHANGELOG.md @@ -1,3 +1,32 @@ +* Update default rendering policies when the controller action did + not explicitly indicate a response. + + For API controllers, the implicit render always renders "204 No Content" + and does not account for any templates. + + For other controllers, the following conditions are checked: + + First, if a template exists for the controller action, it is rendered. + This template lookup takes into account the action name, locales, format, + variant, template handlers, etc. (see +render+ for details). + + Second, if other templates exist for the controller action but is not in + the right format (or variant, etc.), an <tt>ActionController::UnknownFormat</tt> + is raised. The list of available templates is assumed to be a complete + enumeration of all the possible formats (or variants, etc.); that is, + having only HTML and JSON templates indicate that the controller action is + not meant to handle XML requests. + + Third, if the current request is an "interactive" browser request (the user + navigated here by entering the URL in the address bar, submiting a form, + clicking on a link, etc. as opposed to an XHR or non-browser API request), + <tt>ActionView::UnknownFormat</tt> is raised to display a helpful error + message. + + Finally, it falls back to the same "204 No Content" behavior as API controllers. + + *Godfrey Chan*, *Jon Moss*, *Kasper Timm Hansen*, *Mike Clark*, *Matthew Draper* + ## Rails 5.0.0.beta3 (February 24, 2016) ## * Update session to have indifferent access across multiple requests. diff --git a/actionpack/lib/action_controller/metal/basic_implicit_render.rb b/actionpack/lib/action_controller/metal/basic_implicit_render.rb index 6c6f8381ff..cef65a362c 100644 --- a/actionpack/lib/action_controller/metal/basic_implicit_render.rb +++ b/actionpack/lib/action_controller/metal/basic_implicit_render.rb @@ -1,5 +1,5 @@ module ActionController - module BasicImplicitRender + module BasicImplicitRender # :nodoc: def send_action(method, *args) super.tap { default_render unless performed? } end diff --git a/actionpack/lib/action_controller/metal/implicit_render.rb b/actionpack/lib/action_controller/metal/implicit_render.rb index 17fcc2fa02..1f0179a287 100644 --- a/actionpack/lib/action_controller/metal/implicit_render.rb +++ b/actionpack/lib/action_controller/metal/implicit_render.rb @@ -1,29 +1,80 @@ +require 'active_support/core_ext/string/strip' + module ActionController + # Handles implicit rendering for a controller action when it did not + # explicitly indicate an appropiate response via methods such as +render+, + # +respond_to+, +redirect+ or +head+. + # + # For API controllers, the implicit render always renders "204 No Content" + # and does not account for any templates. + # + # For other controllers, the following conditions are checked: + # + # First, if a template exists for the controller action, it is rendered. + # This template lookup takes into account the action name, locales, format, + # variant, template handlers, etc. (see +render+ for details). + # + # Second, if other templates exist for the controller action but is not in + # the right format (or variant, etc.), an <tt>ActionController::UnknownFormat</tt> + # is raised. The list of available templates is assumed to be a complete + # enumeration of all the possible formats (or variants, etc.); that is, + # having only HTML and JSON templates indicate that the controller action is + # not meant to handle XML requests. + # + # Third, if the current request is an "interactive" browser request (the user + # navigated here by entering the URL in the address bar, submiting a form, + # clicking on a link, etc. as opposed to an XHR or non-browser API request), + # <tt>ActionView::UnknownFormat</tt> is raised to display a helpful error + # message. + # + # Finally, it falls back to the same "204 No Content" behavior as API controllers. module ImplicitRender + # :stopdoc: include BasicImplicitRender - # Renders the template corresponding to the controller action, if it exists. - # The action name, format, and variant are all taken into account. - # For example, the "new" action with an HTML format and variant "phone" - # would try to render the <tt>new.html+phone.erb</tt> template. - # - # If no template is found <tt>ActionController::BasicImplicitRender</tt>'s implementation is called, unless - # a block is passed. In that case, it will override the super implementation. - # - # default_render do - # head 404 # No template was found - # end def default_render(*args) if template_exists?(action_name.to_s, _prefixes, variants: request.variant) render(*args) - else - if block_given? - yield(*args) - else - logger.info "No template found for #{self.class.name}\##{action_name}, rendering head :no_content" if logger - super + elsif any_templates?(action_name.to_s, _prefixes) + message = "#{self.class.name}\##{action_name} does not know how to repond " \ + "to this request. There are other templates available for this controller " \ + "action but none of them were suitable for this request.\n\n" \ + "This usually happens when the client requested an unsupported format " \ + "(e.g. requesting HTML content from a JSON endpoint or vice versa), but " \ + "it might also be failing due to other constraints, such as locales or" \ + "variants.\n" + + if request.formats.any? + message << "\nRequested format(s): #{request.formats.join(", ")}" end + + if request.variant.any? + message << "\nRequested variant(s): #{request.variant.join(", ")}" + end + + raise ActionController::UnknownFormat, message + elsif interactive_browser_request? + message = "You did not define any templates for #{self.class.name}\##{action_name}. " \ + "This is not necessarily a problem (e.g. you might be building an API endpoint " \ + "that does not require any templates), and the controller would usually respond " \ + "with `head :no_content` for your convenience.\n\n" \ + "However, you appear to have navigated here from an interactive browser request – " \ + "such as by navigating to this URL directly, clicking on a link or submitting a form. " \ + "Rendering a `head :no_content` in this case could have resulted in unexpected UI " \ + "behavior in the browser.\n\n" \ + "If you expected the `head :no_content` response, you do not need to take any " \ + "actions – requests coming from an XHR (AJAX) request or other non-browser clients " \ + "will receive the \"204 No Content\" response as expected.\n\n" \ + "If you did not expect this behavior, you can resolve this error by adding a " \ + "template for this controller action (usually `#{action_name}.html.erb`) or " \ + "otherwise indicate the appropriate response in the action using `render`, " \ + "`redirect_to`, `head`, etc.\n" + + raise ActionController::UnknownFormat, message + else + logger.info "No template found for #{self.class.name}\##{action_name}, rendering head :no_content" if logger + super end end @@ -32,5 +83,11 @@ module ActionController "default_render" end end + + private + + def interactive_browser_request? + request.format == Mime[:html] && !request.xhr? + end end end diff --git a/actionpack/test/controller/mime/respond_to_test.rb b/actionpack/test/controller/mime/respond_to_test.rb index 76e2d3ff43..d0c7b2e06a 100644 --- a/actionpack/test/controller/mime/respond_to_test.rb +++ b/actionpack/test/controller/mime/respond_to_test.rb @@ -160,7 +160,14 @@ class RespondToController < ActionController::Base end end - def variant_with_implicit_rendering + def variant_with_implicit_template_rendering + # This has exactly one variant template defined in the file system (+mobile.html.erb), + # which raises the regular MissingTemplate error for other variants. + end + + def variant_without_implicit_template_rendering + # This differs from the above in that it does not have any templates defined in the file + # system, which triggers the ImplicitRender (204 No Content) behavior. end def variant_with_format_and_custom_render @@ -272,6 +279,8 @@ class RespondToController < ActionController::Base end class RespondToControllerTest < ActionController::TestCase + NO_CONTENT_WARNING = "No template found for RespondToController#variant_without_implicit_template_rendering, rendering head :no_content" + def setup super @request.host = "www.example.com" @@ -616,30 +625,69 @@ class RespondToControllerTest < ActionController::TestCase end def test_invalid_variant + assert_raises(ActionController::UnknownFormat) do + get :variant_with_implicit_template_rendering, params: { v: :invalid } + end + end + + def test_variant_not_set_regular_unknown_format + assert_raises(ActionController::UnknownFormat) do + get :variant_with_implicit_template_rendering + end + end + + def test_variant_with_implicit_template_rendering + get :variant_with_implicit_template_rendering, params: { v: :mobile } + assert_equal "text/html", @response.content_type + assert_equal "mobile", @response.body + end + + def test_variant_without_implicit_rendering_from_browser + assert_raises(ActionController::UnknownFormat) do + get :variant_without_implicit_template_rendering, params: { v: :does_not_matter } + end + end + + def test_variant_variant_not_set_and_without_implicit_rendering_from_browser + assert_raises(ActionController::UnknownFormat) do + get :variant_without_implicit_template_rendering + end + end + + def test_variant_without_implicit_rendering_from_xhr logger = ActiveSupport::LogSubscriber::TestHelper::MockLogger.new old_logger, ActionController::Base.logger = ActionController::Base.logger, logger - get :variant_with_implicit_rendering, params: { v: :invalid } + get :variant_without_implicit_template_rendering, xhr: true, params: { v: :does_not_matter } assert_response :no_content - assert_equal 1, logger.logged(:info).select{ |s| s =~ /No template found/ }.size, "Implicit head :no_content not logged" + + assert_equal 1, logger.logged(:info).select{ |s| s == NO_CONTENT_WARNING }.size, "Implicit head :no_content not logged" ensure ActionController::Base.logger = old_logger end - def test_variant_not_set_regular_template_missing - get :variant_with_implicit_rendering + def test_variant_without_implicit_rendering_from_api + logger = ActiveSupport::LogSubscriber::TestHelper::MockLogger.new + old_logger, ActionController::Base.logger = ActionController::Base.logger, logger + + get :variant_without_implicit_template_rendering, format: 'json', params: { v: :does_not_matter } assert_response :no_content + + assert_equal 1, logger.logged(:info).select{ |s| s == NO_CONTENT_WARNING }.size, "Implicit head :no_content not logged" + ensure + ActionController::Base.logger = old_logger end - def test_variant_with_implicit_rendering - get :variant_with_implicit_rendering, params: { v: :implicit } + def test_variant_variant_not_set_and_without_implicit_rendering_from_xhr + logger = ActiveSupport::LogSubscriber::TestHelper::MockLogger.new + old_logger, ActionController::Base.logger = ActionController::Base.logger, logger + + get :variant_without_implicit_template_rendering, xhr: true assert_response :no_content - end - def test_variant_with_implicit_template_rendering - get :variant_with_implicit_rendering, params: { v: :mobile } - assert_equal "text/html", @response.content_type - assert_equal "mobile", @response.body + assert_equal 1, logger.logged(:info).select { |s| s == NO_CONTENT_WARNING }.size, "Implicit head :no_content not logged" + ensure + ActionController::Base.logger = old_logger end def test_variant_with_format_and_custom_render @@ -778,24 +826,3 @@ class RespondToControllerTest < ActionController::TestCase assert_equal "phone", @response.body end end - -class RespondToWithBlockOnDefaultRenderController < ActionController::Base - def show - default_render do - render body: 'default_render yielded' - end - end -end - -class RespondToWithBlockOnDefaultRenderControllerTest < ActionController::TestCase - def setup - super - @request.host = "www.example.com" - end - - def test_default_render_uses_block_when_no_template_exists - get :show - assert_equal "default_render yielded", @response.body - assert_equal "text/plain", @response.content_type - end -end diff --git a/actionpack/test/controller/render_test.rb b/actionpack/test/controller/render_test.rb index 60c6518c62..83d7405e4d 100644 --- a/actionpack/test/controller/render_test.rb +++ b/actionpack/test/controller/render_test.rb @@ -26,6 +26,9 @@ end class ImplicitRenderTestController < ActionController::Base def empty_action end + + def empty_action_with_template + end end class TestController < ActionController::Base @@ -537,10 +540,28 @@ end class ImplicitRenderTest < ActionController::TestCase tests ImplicitRenderTestController - def test_implicit_no_content_response - get :empty_action + def test_implicit_no_content_response_as_browser + assert_raises(ActionController::UnknownFormat) do + get :empty_action + end + end + + def test_implicit_no_content_response_as_xhr + get :empty_action, xhr: true assert_response :no_content end + + def test_implicit_success_response_with_right_format + get :empty_action_with_template + assert_equal "<h1>Empty action rendered this implicitly.</h1>\n", @response.body + assert_response :success + end + + def test_implicit_unknown_format_response + assert_raises(ActionController::UnknownFormat) do + get :empty_action_with_template, format: 'json' + end + end end class HeadRenderTest < ActionController::TestCase diff --git a/actionpack/test/fixtures/implicit_render_test/empty_action_with_mobile_variant.html+mobile.erb b/actionpack/test/fixtures/implicit_render_test/empty_action_with_mobile_variant.html+mobile.erb new file mode 100644 index 0000000000..ded99ba52d --- /dev/null +++ b/actionpack/test/fixtures/implicit_render_test/empty_action_with_mobile_variant.html+mobile.erb @@ -0,0 +1 @@ +mobile diff --git a/actionpack/test/fixtures/implicit_render_test/empty_action_with_template.html.erb b/actionpack/test/fixtures/implicit_render_test/empty_action_with_template.html.erb new file mode 100644 index 0000000000..dd294f8cf6 --- /dev/null +++ b/actionpack/test/fixtures/implicit_render_test/empty_action_with_template.html.erb @@ -0,0 +1 @@ +<h1>Empty action rendered this implicitly.</h1> diff --git a/actionpack/test/fixtures/implicit_render_test/some_action_2.html+zomg.erb b/actionpack/test/fixtures/implicit_render_test/some_action_2.html+zomg.erb new file mode 100644 index 0000000000..7d8187321c --- /dev/null +++ b/actionpack/test/fixtures/implicit_render_test/some_action_2.html+zomg.erb @@ -0,0 +1 @@ +zomg diff --git a/actionpack/test/fixtures/respond_to/variant_with_implicit_rendering.html+mobile.erb b/actionpack/test/fixtures/respond_to/variant_with_implicit_template_rendering.html+mobile.erb index 317801ad30..317801ad30 100644 --- a/actionpack/test/fixtures/respond_to/variant_with_implicit_rendering.html+mobile.erb +++ b/actionpack/test/fixtures/respond_to/variant_with_implicit_template_rendering.html+mobile.erb |