Merge pull request #17928 from sergey-alekseev/remove-unused-form-data-method

actionpack/lib/action_dispatch/http/request.rb

@@ -306,10 +306,16 @@ def body
       end
     end
 
-    # Returns true if the request's content MIME type is
-    # +application/x-www-form-urlencoded+ or +multipart/form-data+.
+    # Determine whether the request body contains form-data by checking
+    # the request Content-Type for one of the media-types:
+    # "application/x-www-form-urlencoded" or "multipart/form-data". The
+    # list of form-data media types can be modified through the
+    # +FORM_DATA_MEDIA_TYPES+ array.
+    #
+    # A request body is not assumed to contain form-data when no
+    # Content-Type header is provided and the request_method is POST.
     def form_data?
-      FORM_DATA_MEDIA_TYPES.include?(content_mime_type.to_s)
+      FORM_DATA_MEDIA_TYPES.include?(media_type)
     end
 
     def body_stream #:nodoc:

actionpack/test/dispatch/request_test.rb

@@ -1212,3 +1212,23 @@ def setup
     end
   end
 end
+
+class RequestFormData < BaseRequestTest
+  test 'media_type is from the FORM_DATA_MEDIA_TYPES array' do
+    assert stub_request('CONTENT_TYPE' => 'application/x-www-form-urlencoded').form_data?
+    assert stub_request('CONTENT_TYPE' => 'multipart/form-data').form_data?
+  end
+
+  test 'media_type is not from the FORM_DATA_MEDIA_TYPES array' do
+    assert !stub_request('CONTENT_TYPE' => 'application/xml').form_data?
+    assert !stub_request('CONTENT_TYPE' => 'multipart/related').form_data?
+  end
+
+  test 'no Content-Type header is provided and the request_method is POST' do
+    request = stub_request('REQUEST_METHOD' => 'POST')
+
+    assert_equal '', request.media_type
+    assert_equal 'POST', request.request_method
+    assert !request.form_data?
+  end
+end