已购买课程导出PDF工具
需要输入极客时间官网账号密码
安装请参照官网: https://wkhtmltopdf.org
go get github.com/sirupsen/logrus
go get github.com/SebastiaanKlippert/go-wkhtmltopdf
go get github.com/pkg/errors
$ ./geekpdf -h
Usage of ./geekpdf:
-c string
Cellphone
-i int
Product ID
-p string
Path to store pdf (default "pdf/")
-w string
Password