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wechat_servier_api.go
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/
wechat_servier_api.go
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//==================================
// * Name:Jerry
// * DateTime:2019/5/6 13:16
// * Desc:
//==================================
package gopay
import (
"bytes"
"crypto/hmac"
"crypto/md5"
"crypto/sha256"
"crypto/tls"
"encoding/hex"
"github.com/parnurzeal/gorequest"
"strings"
)
func HttpAgent() (agent *gorequest.SuperAgent) {
agent = gorequest.New()
agent.TLSClientConfig(&tls.Config{InsecureSkipVerify: true})
return
}
//JSAPI支付,支付参数后,再次计算出小程序用的paySign
func GetMiniPaySign(appId, nonceStr, prepayId, signType, timeStamp, secretKey string) (paySign string) {
buffer := new(bytes.Buffer)
buffer.WriteString("appId=")
buffer.WriteString(appId)
buffer.WriteString("&nonceStr=")
buffer.WriteString(nonceStr)
buffer.WriteString("&package=")
buffer.WriteString(prepayId)
buffer.WriteString("&signType=")
buffer.WriteString(signType)
buffer.WriteString("&timeStamp=")
buffer.WriteString(timeStamp)
buffer.WriteString("&key=")
buffer.WriteString(secretKey)
signStr := buffer.String()
var hashSign []byte
if signType == SignType_MD5 {
hash := md5.New()
hash.Write([]byte(signStr))
hashSign = hash.Sum(nil)
} else {
hash := hmac.New(sha256.New, []byte(secretKey))
hash.Write([]byte(signStr))
hashSign = hash.Sum(nil)
}
paySign = strings.ToUpper(hex.EncodeToString(hashSign))
return
}
//JSAPI支付,支付参数后,再次计算出微信内H5支付需要用的paySign
func GetH5PaySign(appId, nonceStr, prepayId, signType, timeStamp, secretKey string) (paySign string) {
buffer := new(bytes.Buffer)
buffer.WriteString("appId=")
buffer.WriteString(appId)
buffer.WriteString("&nonceStr=")
buffer.WriteString(nonceStr)
buffer.WriteString("&package=")
buffer.WriteString(prepayId)
buffer.WriteString("&signType=")
buffer.WriteString(signType)
buffer.WriteString("&timeStamp=")
buffer.WriteString(timeStamp)
buffer.WriteString("&key=")
buffer.WriteString(secretKey)
signStr := buffer.String()
var hashSign []byte
if signType == SignType_MD5 {
hash := md5.New()
hash.Write([]byte(signStr))
hashSign = hash.Sum(nil)
} else {
hash := hmac.New(sha256.New, []byte(secretKey))
hash.Write([]byte(signStr))
hashSign = hash.Sum(nil)
}
paySign = strings.ToUpper(hex.EncodeToString(hashSign))
return
}
//获取微信用户的OpenId、SessionKey、UnionId
// appId:APPID
// appSecret:AppSecret
// wxCode:小程序调用wx.login 获取的code
func Code2Session(appId, appSecret, wxCode string) (userRsp *Code2SessionRsp, err error) {
userRsp = new(Code2SessionRsp)
url := "https://api.weixin.qq.com/sns/jscode2session?appid=" + appId + "&secret=" + appSecret + "&js_code=" + wxCode + "&grant_type=authorization_code"
agent := HttpAgent()
_, _, errs := agent.Get(url).EndStruct(userRsp)
if len(errs) > 0 {
return nil, errs[0]
} else {
return userRsp, nil
}
}
//获取小程序全局唯一后台接口调用凭据(AccessToken:157字符)
// appId:APPID
// appSecret:AppSecret
func GetAccessToken(appId, appSecret string) (rsp *GetAccessTokenRsp, err error) {
rsp = new(GetAccessTokenRsp)
url := "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + appSecret
agent := HttpAgent()
_, _, errs := agent.Get(url).EndStruct(rsp)
if len(errs) > 0 {
return nil, errs[0]
} else {
return rsp, nil
}
}
//用户支付完成后,获取该用户的 UnionId,无需用户授权。
// accessToken:接口调用凭据
// openId:用户的OpenID
// transactionId:微信支付订单号
func GetPaidUnionId(accessToken, openId, transactionId string) (rsp *GetPaidUnionIdRsp, err error) {
rsp = new(GetPaidUnionIdRsp)
url := "https://api.weixin.qq.com/wxa/getpaidunionid?access_token=" + accessToken + "&openid=" + openId + "&transaction_id=" + transactionId
agent := HttpAgent()
_, _, errs := agent.Get(url).EndStruct(rsp)
if len(errs) > 0 {
return nil, errs[0]
} else {
return rsp, nil
}
}