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reply.go
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reply.go
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package wechat
import (
"encoding/xml"
"errors"
"strconv"
"time"
"github.com/sohaha/zlsgo/zstring"
"github.com/sohaha/zlsgo/ztype"
)
type (
ReplyNews []struct {
PicUrl string
Title string
Description string
Url string
}
Reply struct {
openid string
}
CDATA struct {
Value string `xml:",cdata"`
}
ReplySt struct {
Content string `xml:"Content"`
CreateTime uint64
FromUserName string
MsgId int
MsgType string
Event string
ToUserName string
MediaId string
// image
PicUrl string
// voice
Format string
Recognition string
// video or shortvideo
ThumbMediaId string
// location
LocationX string `xml:"Location_X"`
LocationY string `xml:"Location_Y"`
Longitude string `xml:"Longitude"`
Latitude string `xml:"Latitude"`
Scale string
Label string
// link
Title string
Description string
Url string
// Qy
AgentID string `xml:"AgentID"`
isEncrypt bool
receiverID string
received *ReceivedSt
}
)
type (
ReceivedSt struct {
echostr string
data *ReplySt
encrypt string
isEncrypt bool
signature string
timestamp string
nonce string
bodyData []byte
token string
encodingAesKey string
msgSignature string
}
)
func (e *Engine) Reply(querys map[string]string,
bodyData []byte) (received *ReceivedSt,
err error) {
received = &ReceivedSt{}
received.echostr, _ = querys["echostr"]
received.signature, _ = querys["signature"]
received.timestamp, _ = querys["timestamp"]
received.nonce, _ = querys["nonce"]
received.encrypt, _ = querys["encrypt"]
received.msgSignature, _ = querys["msg_signature"]
received.token = e.GetToken()
received.encodingAesKey = e.GetEncodingAesKey()
received.isEncrypt = received.msgSignature != ""
received.bodyData = bodyData
return
}
func (r *ReceivedSt) Valid() (validMsg string, err error) {
if r.isEncrypt {
if r.msgSignature != sha1Signature(r.token, r.timestamp, r.nonce, r.echostr) {
err = errors.New("decryption failed")
return
}
var plaintext []byte
plaintext, err = aesDecrypt(r.echostr, r.encodingAesKey)
if err != nil {
return
}
_, _, plaintext, _, err = parsePlainText(plaintext)
if err != nil {
return
}
validMsg = zstring.Bytes2String(plaintext)
} else {
if r.signature != sha1Signature(r.token, r.timestamp, r.nonce) {
err = errors.New("decryption failed")
return
}
validMsg = r.echostr
}
return
}
func (r *ReceivedSt) Data() (data *ReplySt, err error) {
if r.data != nil {
return r.data, nil
}
if r.isEncrypt {
var arr ztype.Map
arr, err = ParseXML2Map(r.bodyData)
if err != nil {
return
}
var plaintext []byte
plaintext, err = aesDecrypt(arr.Get("Encrypt").String(), r.encodingAesKey)
if err != nil {
return
}
var receiverID []byte
_, _, plaintext, receiverID, err = parsePlainText(plaintext)
if err != nil {
return
}
log.Debug(zstring.Bytes2String(plaintext))
err = xml.Unmarshal(plaintext, &data)
if err == nil {
data.received = r
data.isEncrypt = true
data.receiverID = zstring.Bytes2String(receiverID)
}
} else {
// log.Debug(zstring.Bytes2String(r.bodyData))
err = xml.Unmarshal(r.bodyData, &data)
}
return
}
func (t *ReplySt) ReplyCustom(fn func(r *ReplySt) (xml string)) string {
reply := t.encrypt(fn(t))
return reply
}
func (t *ReplySt) encrypt(content string) string {
var err error
if t.isEncrypt {
data := ztype.Map{}
var encrypt []byte
encrypt, err = aesEncrypt(MarshalPlainText(content, t.receiverID,
zstring.Rand(16)),
t.received.encodingAesKey)
if err != nil {
return ""
}
signature := sha1Signature(t.received.token, zstring.Bytes2String(encrypt), t.received.timestamp, t.received.nonce)
data["Encrypt"] = zstring.Bytes2String(encrypt)
data["MsgSignature"] = signature
data["TimeStamp"] = t.received.timestamp
data["Nonce"] = t.received.nonce
reply, _ := FormatMap2XML(data)
return reply
}
return content
}
func (t *ReplySt) ReplyText(content ...string) (reply string) {
if len(content) == 0 {
return "success"
}
data := ztype.Map{
"Content": content[0],
"CreateTime": strconv.FormatInt(time.Now().Unix(), 10),
"ToUserName": t.FromUserName,
"FromUserName": t.ToUserName,
"MsgType": "text",
}
reply, _ = FormatMap2XML(data)
reply = t.encrypt(reply)
return
}
func (t *ReplySt) ReplyNews(items ReplyNews) (reply string) {
if len(items) == 0 {
return "success"
}
data := ztype.Map{
"CreateTime": strconv.FormatInt(time.Now().Unix(), 10),
"ToUserName": t.FromUserName,
"FromUserName": t.ToUserName,
"MsgType": "news",
"ArticleCount": len(items),
}
articles := make(ztype.Maps, len(items))
for i := range items {
articles = append(articles, ztype.Map{
"Title": items[i].Title,
"Description": items[i].Description,
"PicUrl": items[i].PicUrl,
"Url": items[i].Url,
})
}
data["Articles"] = articles
reply, _ = FormatMap2XML(data)
reply = t.encrypt(reply)
return
}