sign=md5(url参数&ulcookie=ulcookie)
例如请求Url:https://saas.daxue.dingtalk.com/dingtalk/pack/v2/detail/assist.jhtml?packageId=363001
那么Header中使用的sign=md5(packageId=363001&ulcookie=ulcookie值)
示例：
https://saas.daxue.dingtalk.com/dingtalk/pack/v2/detail/assist.jhtml?packageId=363001
Cookie:cookie
Accept: application/json, text/plain, */*
Connection: KeepAlive
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36 dingtalk-win/1.0.0 nw(0.14.7) DingTalk(4.7.9-Release.43) Mojo/1.0.0 Native AppType(release)
Referer: https://saas.daxue.dingtalk.com/dingtalk/pc/detail.jhtml?appId=5488&corpid=ding310af7dd98e3ebdc35c2f4657eb6378f
X-XSRF-TOKEN: 对应cookie中的X-XSRF-TOKEN
isAjax: true
ulcookie: ulcookie
sign: sign
Host: saas.daxue.dingtalk.com
大家可以通过CookieEditor 的Chrome插件进行抓包