update

router/line/line.go

@@ -1,8 +1,93 @@
 package line
 
-import "context"
+import (
+	"crypto/hmac"
+	"crypto/sha256"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+
+	"git.trj.tw/golang/mtfosbot/module/config"
+	"git.trj.tw/golang/mtfosbot/module/context"
+	"git.trj.tw/golang/mtfosbot/module/line-message"
+	lineobj "git.trj.tw/golang/mtfosbot/module/line-message/line-object"
+)
+
+// GetRawBody - line webhook body get
+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 - middleware
+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()
+}
 
 // GetLineMessage -
 func GetLineMessage(c *context.Context) {
+	rawbody, ok := c.Get("rawbody")
+	if !ok {
+		c.DataFormat("body read fail")
+	}
+	var raw []byte
+	if raw, ok = rawbody.([]byte); !ok {
+		c.DataFormat("body type error")
+	}
 
+	events := struct {
+		Events []*lineobj.EventObject `json:"events"`
+	}{}
+
+	err := json.Unmarshal(raw, &events)
+	if err != nil {
+		fmt.Println("parse line message error ::: ", err)
+		c.ServerError(nil)
+		return
+	}
+
+	if len(events.Events) > 0 {
+		for _, v := range events.Events {
+			go linemsg.MessageEvent(v)
+		}
+	}
+
+	c.Success(nil)
 }