https://blog.csdn.net/fangdengfu123/article/details/80579057
https://www.cnblogs.com/13579net/p/9116551.html
https://stackoverflow.com/questions/49560104/cannot-find-package-cid-in-goroot-or-gopath
https://stackoverflow.com/questions/48901966/undefined-x509-marshalpkcs1publickey-when-calling-on-rsa-publickey
https://blog.csdn.net/oXiaoBuDing/article/details/84655511
https://blog.csdn.net/zhongdahong/article/details/89711792
https://blog.csdn.net/xuyuzhuang1991/article/details/90299706
https://ask.csdn.net/questions/1023033
