Merge pull request #44608 from MGatner/problem-json

Mime Support for "problem detail"

actionpack/lib/action_dispatch/http/mime_types.rb

@@ -43,7 +43,8 @@
 
 # https://www.ietf.org/rfc/rfc4627.txt
 # http://www.json.org/JSONRequest.html
-Mime::Type.register "application/json", :json, %w( text/x-json application/jsonrequest )
+# https://www.ietf.org/rfc/rfc7807.txt
+Mime::Type.register "application/json", :json, %w( text/x-json application/jsonrequest application/problem+json )
 
 Mime::Type.register "application/pdf", :pdf, [], %w(pdf)
 Mime::Type.register "application/zip", :zip, [], %w(zip)

actionpack/test/dispatch/request/json_params_parsing_test.rb

@@ -39,6 +39,13 @@ def teardown
     )
   end
 
+  test "parses json params for application problem+json" do
+    assert_parses(
+      { "person" => { "name" => "David" } },
+      "{\"person\": {\"name\": \"David\"}}", "CONTENT_TYPE" => "application/problem+json"
+    )
+  end
+
   test "does not parse unregistered media types such as application/vnd.api+json" do
     assert_parses(
       {},