/
wx_jssdk.go
186 lines (174 loc) · 4.33 KB
/
wx_jssdk.go
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//微信公众号jssdk
package libs
import(
"XYAPIServer/XYLibs"
"fmt"
"errors"
"encoding/json"
"math/rand"
"time"
"net/http"
"crypto/sha1"
"strings"
)
const (
wx_mp_cache_key_token = "wx_mp_cache_key_token"
wx_mp_cache_key_ticket = "wx_mp_cache_key_ticket"
wx_mp_token_url = "https://api.weixin.qq.com/cgi-bin/token"
wx_mp_ticket_url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket"
)
func NewWXMPjsSdk(appid,secret string,redis *XYLibs.RedisHash) *WXMPjsSdk {
obj := &WXMPjsSdk{
appId:appid,
appSecret:secret,
redisDB:redis,
}
return obj
}
type WXMPjsSdk struct {
appId string
appSecret string
redisDB *XYLibs.RedisHash
}
func (wx *WXMPjsSdk) GetAccessToken()(string,error) {
accountToken,_ := wx.redisDB.Get(wx_mp_cache_key_token)
if accountToken != nil {
token :=""
switch accountToken.(type) {
case string :
token = accountToken.(string)
case []uint8:
token = string(accountToken.([]uint8))
}
if token != "" {
return token,nil
}
return "",errors.New("get cache token fail")
}else{
url := fmt.Sprintf("%s?grant_type=client_credential&appid=%s&secret=%s",wx_mp_token_url,wx.appId,wx.appSecret)
data ,err := XYLibs.HttpGet(url)
if err != nil {
return "",err
}
var res map[string]interface{}
e := json.Unmarshal(data,&res)
if e != nil {
return "",e
}
if tmp,ok := res["access_token"];ok {
if token,ok := tmp.(string);ok{
exp := 0
switch res["expires_in"].(type) {
case float64:
exp = int(res["expires_in"].(float64))
case int64:
exp = int(res["expires_in"].(int64))
}
if exp > 200 {
wx.redisDB.SETEX(wx_mp_cache_key_token,exp - 200,token)
}
return token,nil
}
return "",errors.New("read access_token fail")
}
return "",errors.New(res["errmsg"].(string))
}
}
func (wx *WXMPjsSdk) GetJsApiTicket()(string,error){
jsapiTicket,_ := wx.redisDB.Get(wx_mp_cache_key_ticket)
//fmt.Printf("%#v\n",jsapiTicket)
if jsapiTicket != nil {
ticket := ""
switch jsapiTicket.(type) {
case string:
ticket = jsapiTicket.(string)
case []uint8:
ticket = string(jsapiTicket.([]uint8))
}
if ticket != "" {
return ticket , nil
}
return "",errors.New("read cache ticket fail")
}else{
token,err := wx.GetAccessToken()
if err != nil {
return "",err
}
url := fmt.Sprintf("%s?type=jsapi&access_token=%s",wx_mp_ticket_url,token)
println(url)
data ,err := XYLibs.HttpGet(url)
if err != nil {
return "",err
}
var res map[string]interface{}
e := json.Unmarshal(data,&res)
if e != nil {
return "",e
}
if tmp,ok := res["ticket"];ok {
ticket := tmp.(string)
exp := 0
switch res["expires_in"].(type) {
case float64:
exp = int(res["expires_in"].(float64))
case int64:
exp = int(res["expires_in"].(int64))
}
if exp > 200 {
wx.redisDB.SETEX(wx_mp_cache_key_ticket,exp - 200,ticket)
}
return ticket,nil
}
return "",errors.New(res["errmsg"].(string))
}
}
func (wx *WXMPjsSdk) CreateNonceStr() string {
chars := "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
str := "";
rd := rand.New(rand.NewSource(time.Now().UnixNano()))
length := len(chars) - 1
for i := 0; i < 16; i++ {
index := rd.Intn(length)
str += string(chars[index])
}
return str;
}
func (wx *WXMPjsSdk) GetSignPackage(req *http.Request) map[string]string {
res := map[string]string{
"appId" : "",
"nonceStr" : "",
"timestamp" : "",
"url" : "",
"signature" : "",
"rawString" : "",
}
ua := req.Header.Get("User-Agent")
if ua != "" {
ua = strings.ToLower(ua)
}
//println(ua)
if !strings.Contains(ua,"micromessenger") {
return res
}
scheme := req.URL.Scheme
if scheme == "" {
if req.TLS == nil {
scheme = "http"
}else{
scheme = "https"
}
}
jsapiTicket,err := wx.GetJsApiTicket()
if err != nil {
println(err.Error())
}
res["appId"] = wx.appId
res["url"] = fmt.Sprintf("%s://%s%s",scheme,req.Host,req.URL.RequestURI())
res["timestamp"] = fmt.Sprintf("%d",time.Now().Unix())
res["nonceStr"] = wx.CreateNonceStr()
res["rawString"] = fmt.Sprintf("jsapi_ticket=%s&noncestr=%s×tamp=%s&url=%s",jsapiTicket,res["nonceStr"],res["timestamp"],res["url"])
println(res["rawString"])
res["signature"] = fmt.Sprintf("%x",sha1.Sum([]byte(res["rawString"])))
println(res["signature"])
return res
}