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package wx
import (
"errors"
"fmt"
"github.com/medivhzhan/weapp/v2"
)
const (
apiLogin = "/sns/jscode2session"
apiGetAccessToken = "/cgi-bin/token"
apiGetPaidUnionID = "/wxa/getpaidunionid"
)
// LoginResponse 返回给用户的数据
type LoginResponse struct {
CommonError
OpenID string `json:"openid"`
SessionKey string `json:"session_key"`
// 用户在开放平台的唯一标识符 只在关注公众号的前提下
UnionID string `json:"unionid"`
Mobile string `json:"mobile"`
}
// Login 登录凭证校验。通过 wx.login 接口获得临时登录凭证 code 后传到开发者服务器调用此接口完成登录流程。
//
// appID 小程序 appID
// secret 小程序的 app secret
// code 小程序登录时获取的 code
func GetWxLoginRes(appID, secret, code, encryptedDate, iv string) (*LoginResponse, error) {
api := baseURL + apiLogin
loginResponse, err := getWxLoginRes(appID, secret, code, api)
if err != nil {
fmt.Println(111)
return nil, err
}
if loginResponse.CommonError.ErrCode != 0 {
fmt.Println(222)
fmt.Println(loginResponse.CommonError.ErrCode)
return nil, errors.New("code过期:" + loginResponse.CommonError.ErrMSG)
}
mobile, err := weapp.DecryptMobile(loginResponse.SessionKey, encryptedDate, iv)
if err != nil {
fmt.Println(333)
return nil, err
}
loginResponse.Mobile = mobile.PhoneNumber
return loginResponse, nil
}
func GetOpenId(appID, secret, code string) (string, error) {
api := baseURL + apiLogin
queries := requestQueries{
"appid": appID,
"secret": secret,
"js_code": code,
"grant_type": "authorization_code",
}
url, err := encodeURL(api, queries)
if err != nil {
return "", err
}
res := new(LoginResponse)
if err := getJSON(url, res); err != nil {
return "", err
}
return res.OpenID, nil
}
func getWxLoginRes(appID, secret, code, api string) (*LoginResponse, error) {
queries := requestQueries{
"appid": appID,
"secret": secret,
"js_code": code,
"grant_type": "authorization_code",
}
url, err := encodeURL(api, queries)
if err != nil {
return nil, err
}
res := new(LoginResponse)
if err := getJSON(url, res); err != nil {
return nil, err
}
return res, nil
}
// TokenResponse 获取 access_token 成功返回数据
type TokenResponse struct {
CommonError
AccessToken string `json:"access_token"` // 获取到的凭证
ExpiresIn uint `json:"expires_in"` // 凭证有效时间,单位:秒。目前是7200秒之内的值。
}
// GetAccessToken 获取小程序全局唯一后台接口调用凭据(access_token)。
// 调调用绝大多数后台接口时都需使用 access_token,开发者需要进行妥善保存,注意缓存。
func GetAccessToken(appID, secret string) (*TokenResponse, error) {
api := baseURL + apiGetAccessToken
return getAccessToken(appID, secret, api)
}
func getAccessToken(appID, secret, api string) (*TokenResponse, error) {
queries := requestQueries{
"appid": appID,
"secret": secret,
"grant_type": "client_credential",
}
url, err := encodeURL(api, queries)
if err != nil {
return nil, err
}
res := new(TokenResponse)
if err := getJSON(url, res); err != nil {
return nil, err
}
return res, nil
}
// GetPaidUnionIDResponse response data
type GetPaidUnionIDResponse struct {
CommonError
UnionID string `json:"unionid"`
}
// GetPaidUnionID 用户支付完成后,通过微信支付订单号(transaction_id)获取该用户的 UnionId,
func GetPaidUnionID(accessToken, openID, transactionID string) (*GetPaidUnionIDResponse, error) {
api := baseURL + apiGetPaidUnionID
return getPaidUnionID(accessToken, openID, transactionID, api)
}
func getPaidUnionID(accessToken, openID, transactionID, api string) (*GetPaidUnionIDResponse, error) {
queries := requestQueries{
"openid": openID,
"access_token": accessToken,
"transaction_id": transactionID,
}
return getPaidUnionIDRequest(api, queries)
}
// GetPaidUnionIDWithMCH 用户支付完成后,通过微信支付商户订单号和微信支付商户号(out_trade_no 及 mch_id)获取该用户的 UnionId,
func GetPaidUnionIDWithMCH(accessToken, openID, outTradeNo, mchID string) (*GetPaidUnionIDResponse, error) {
api := baseURL + apiGetPaidUnionID
return getPaidUnionIDWithMCH(accessToken, openID, outTradeNo, mchID, api)
}
func getPaidUnionIDWithMCH(accessToken, openID, outTradeNo, mchID, api string) (*GetPaidUnionIDResponse, error) {
queries := requestQueries{
"openid": openID,
"mch_id": mchID,
"out_trade_no": outTradeNo,
"access_token": accessToken,
}
return getPaidUnionIDRequest(api, queries)
}
func getPaidUnionIDRequest(api string, queries requestQueries) (*GetPaidUnionIDResponse, error) {
url, err := encodeURL(api, queries)
if err != nil {
return nil, err
}
res := new(GetPaidUnionIDResponse)
if err := getJSON(url, res); err != nil {
return nil, err
}
return res, nil
}