On Tue, May 16, 2017 at 2:26 PM, Guangyao_Cheng <guangyao@nfs.iscas.ac.cn> wrote:
I try to auto-login mediawiki by API login,but didn't know how to do.Since I already used login api get "success" status on sandbox, I think maybe I do something wrong on set cookie.Get token and login api has been revamped in version 1.27 of MediaWiki,I can't find any example code work on 1.28.Thanks for all responses and suggestion. I've been stuck for so long. I really appreciate some help here. Thanks.

You are not setting any cookie that would authenticate the user (just setting username + ID is not enough for obvious reasons). You should probably just use a cookie jar instead of trying to reimplement cookie handling manually.
Also you should properly encode things (what happens if the password contains an & character?)

I also try to use clientlogin via postman, post request exactly like example on mediawiki.org/wiki/API:Login ,but result: "authmanager-authn-no-primary".

That means you have not submitted any set of credentials that would be meaningful for login (such as a username + password). That or the wiki is misconfigured in some weird way and there is no way to log in at all (but you'd notice that when logging in manually).