url = 'http://xx' #post到url
field_hash = {key: key, token: token}  #post數(shù)據(jù)
request = RestClient.post url, field_hash.merge(file: File.new(File.join('public', "#{params[:logo]}"), 'rb'))  #上傳文件

reponse = request.to_s #返回結果