Merge remote-tracking branch 'upstream/pull/3251'

[rails.git] / app / controllers / api_controller.rb

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index c0534a6faef18b4b56abf0d33a6cf66d5423763f..a138976409bba94bb259fbc1caac61935aa1f325 100644 (file)
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -4,48 +4,45 @@ class ApiController < ApplicationController
   private
 
   ##
-  # Set default request format to xml unless a client requests a specific format,
-  # which can be done via (a) URL suffix and/or (b) HTTP Accept header, where
-  # the URL suffix always takes precedence over the Accept header.
-  def set_default_request_format
+  # Set allowed request formats if no explicit format has been
+  # requested via a URL suffix. Allowed formats are taken from
+  # any HTTP Accept header with XML as the default.
+  def set_request_formats
     unless params[:format]
       accept_header = request.headers["HTTP_ACCEPT"]
-      if accept_header.nil?
-        # e.g. unit tests don't set an Accept: header by default, force XML in this case
-        request.format = "xml"
-        return
-      end
-
-      req_mimetypes = []
-
-      # Some clients (JOSM) send Accept headers which cannot be parsed by Rails, example: *; q=.2
-      # To be fair, JOSM's Accept header doesn't adhere to RFC 7231, section 5.3.1, et al. either
-      # As a workaround for backwards compatibility, we're assuming XML format
-      begin
-        req_mimetypes = Mime::Type.parse(accept_header)
-      rescue Mime::Type::InvalidMimeType
-        request.format = "xml"
-        return
-      end
 
-      # req_mimetypes contains all Accept header MIME types with descending priority
-      req_mimetypes.each do |mime|
-        if mime.symbol == :xml
-          request.format = "xml"
-          break
+      if accept_header
+        # Some clients (such asJOSM) send Accept headers which cannot be
+        # parse by Rails, for example:
+        #
+        #   Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
+        #
+        # where both "*" and ".2" as a quality do not adhere to the syntax
+        # described in RFC 7231, section 5.3.1, etc.
+        #
+        # As a workaround, and for back compatibility, default to XML format.
+        mimetypes = begin
+          Mime::Type.parse(accept_header)
+        rescue Mime::Type::InvalidMimeType
+          Array(Mime[:xml])
         end
 
-        if mime.symbol == :json
-          request.format = "json"
-          break
-        end
-
-        # Any format, not explicitly requesting XML or JSON -> assume XML as default
-        if mime == "*/*"
-          request.format = "xml"
-          break
+        # Allow XML and JSON formats, and treat an all formats wildcard
+        # as XML for backwards compatibility - all other formats are discarded
+        # which will result in a 406 Not Acceptable response being sent
+        formats = mimetypes.map do |mime|
+          if mime.symbol == :xml then :xml
+          elsif mime.symbol == :json then :json
+          elsif mime == "*/*" then :xml
+          end
         end
+      else
+        # Default to XML if no accept header was sent - this includes
+        # the unit tests which don't set one by default
+        formats = Array(:xml)
       end
+
+      request.formats = formats.compact
     end
   end
 
@@ -64,7 +61,9 @@ class ApiController < ApplicationController
 
   def current_ability
     # Use capabilities from the oauth token if it exists and is a valid access token
-    if Authenticator.new(self, [:token]).allow?
+    if doorkeeper_token&.accessible?
+      ApiAbility.new(nil).merge(ApiCapability.new(doorkeeper_token))
+    elsif Authenticator.new(self, [:token]).allow?
       ApiAbility.new(nil).merge(ApiCapability.new(current_token))
     else
       ApiAbility.new(current_user)
@@ -72,7 +71,7 @@ class ApiController < ApplicationController
   end
 
   def deny_access(_exception)
-    if current_token
+    if doorkeeper_token || current_token
       set_locale
       report_error t("oauth.permissions.missing"), :forbidden
     elsif current_user
@@ -97,7 +96,11 @@ class ApiController < ApplicationController
   # is optional.
   def setup_user_auth
     # try and setup using OAuth
-    unless Authenticator.new(self, [:token]).allow?
+    if doorkeeper_token&.accessible?
+      self.current_user = User.find(doorkeeper_token.resource_owner_id)
+    elsif Authenticator.new(self, [:token]).allow?
+      # self.current_user setup by OAuth
+    else
       username, passwd = get_auth_data # parse from headers
       # authenticate per-scheme
       self.current_user = if username.nil?