Rack 3 / Sinatra 4 upgrade: Rewind body before reading

Author: jochenehret

app/controllers/internal/staging_completion_controller.rb

@@ -121,7 +121,8 @@ def prometheus_updater
     attr_reader :stagers
 
     def read_body
-      payload          = body.read
+      request.body.rewind
+      payload = request.body.read
       Oj.load(payload, symbol_keys: true)
     rescue StandardError => e
       logger.error('diego.staging.parse-error', payload: payload, error: e.to_s)

app/controllers/internal/task_completion_controller.rb

@@ -25,7 +25,8 @@ def complete_task(task_guid, task_response)
     end
 
     def read_body
-      payload = body.read
+      request.body.rewind
+      payload = request.body.read
       Oj.load(payload, symbol_keys: true)
     rescue StandardError => e
       logger.error('diego.task.parse-error', payload: payload, error: e.to_s)