curl 訪問加密網頁時需要如果出現ca認證問題，那可以用添加 -k 參數來略過，如果不行，那就得采用如下辦法：
參考而已 比如裏面的curl-ca-bundle.crt 會變成 ca-bundle.crt
$ curl-config--ca#
show path to the certificate
/usr/local/share/curl/curl-ca-bundle.crt
$ cd /usr/local/share/curl/#
go to that path
$ cp curl-ca-bundle.crt
curl-ca-bundle.crt.bak#
backup certificate
$ curl http://curl.haxx.se/ca/cacert.pem -o curl-ca-bundle.crt # download new
Reference: