post https://api.coohom.com/global/upload
Obtain the upload AK of aliyun oss. This interface is implemented based on the aliyun sts authorization mechanism. This method restricts the bucket where the file is transferred and the path of the file on the oss. Please refer to: [Alibaba Cloud OSS direct transmission method (based on STS method)]( https://open.kujiale.com/open/apps/1/docs?doc_id=216 ""Alibaba Cloud OSS direct transmission method (based on STS method) "") use. This time, the sts authorization is only granted to the client's PUT method, not the POST method, so please use the put method of aliyun oss to upload files.