mtgbot/router/line/line.go

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2018-12-24 09:34:24 +00:00
package line
import (
"crypto/hmac"
"crypto/sha256"
"encoding/base64"
"io/ioutil"
"git.trj.tw/golang/mtgbot/modules/config"
"git.trj.tw/golang/mtgbot/modules/context"
"git.trj.tw/golang/mtgbot/modules/lineobj"
)
// GetRawBody -
func GetRawBody(c *context.Context) {
byteBody, err := ioutil.ReadAll(c.Request.Body)
if err != nil {
c.DataFormat("body read fail")
return
}
c.Set("rawbody", byteBody)
c.Next()
}
// VerifyLine -
func VerifyLine(c *context.Context) {
rawbody, ok := c.Get("rawbody")
if !ok {
c.DataFormat("body read fail")
return
}
var raw []byte
if raw, ok = rawbody.([]byte); !ok {
c.DataFormat("body type error")
return
}
sign := c.GetHeader("X-Line-Signature")
if len(sign) == 0 {
c.Next()
return
}
conf := config.GetConf()
hash := hmac.New(sha256.New, []byte(conf.Line.Secret))
_, err := hash.Write(raw)
if err != nil {
c.ServerError(nil)
return
}
hashSign := base64.StdEncoding.EncodeToString(hash.Sum(nil))
if hashSign != sign {
c.CustomRes(403, map[string]string{
"message": "sign verify fail",
})
return
}
c.Next()
}
// LineWebhook -
func LineWebhook(c *context.Context) {
rawbody, ok := c.Get("rawbody")
if !ok {
c.DataFormat("body read fail")
return
}
var raw []byte
if raw, ok = rawbody.([]byte); !ok {
c.DataFormat("body type error")
return
}
events := lineobj.ParseWebhookBody(raw)
if events == nil {
c.ServerError(nil)
return
}
if len(events.Events) > 0 {
for _, v := range events.Events {
go lineobj.MessageEvent(v)
}
}
c.Success(nil)
}