GitLab

* app use async engine

* add stop logic

* app update cancel

* app support restful-api

* update doc and use the right model name

* set doc url root

* add comments

* add an example

* renew_session

* update readme.md

* resolve comments

* Update restful_api.md

* Update restful_api.md

* Update restful_api.md

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Co-authored-by: tpoisonooo <khj.application@aliyun.com>