request URL:  https://aip.baidubce.com/rest/2.0/ocr/v1/general_basic method: post header: Content-Type:application/x-www-form-urlencoded Body: access_token:24.b305c9822131e65eda05e29c157dd719.2592000.1559103982.282335-16139329 image: language_type:CHN_ENG probability:true detect_direction:true