一、支付流程 微信開放平臺H5支付接入相關鏈接：https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_4 相應的支付流程： 二、相關代碼 1、統一下單 2、驗簽(待續) ...
一、支付流程
微信開放平臺H5支付接入相關鏈接：https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=15_4
相應的支付流程：
二、相關代碼
1、統一下單
//首先定義一個UnifyOrderReq用於填入我們要傳入的參數。
type UnifyOrderReq struct {
Appid string `xml:"appid"`
Body string `xml:"body"`
Mch_id string `xml:"mch_id"`
Nonce_str string `xml:"nonce_str"`
Notify_url string `xml:"notify_url"`
Trade_type string `xml:"trade_type"`
Spbill_create_ip string `xml:"spbill_create_ip"`
Total_fee int `xml:"total_fee"`
Out_trade_no string `xml:"out_trade_no"`
Sign string `xml:"sign"`
}
//wxpay計算簽名的函數
func (o *APIHandler) wxpayCalcSign(mReq map[string]interface{}, key string) (sign string) {
log4go.Debug("wxpayCalcSign()...API KEY:%s", key)
//STEP 1, 對key進行升序排序.
sorted_keys := make([]string, 0)
for k, _ := range mReq {
sorted_keys = append(sorted_keys, k)
}
sort.Strings(sorted_keys)
//STEP2, 對key=value的鍵值對用&連接起來，略過空值
var signStrings string
for _, k := range sorted_keys {
fmt.Printf("k=%v, v=%v\n", k, mReq[k])
value := fmt.Sprintf("%v", mReq[k])
if value != "" {
signStrings = signStrings + k + "=" + value + "&"
}
}
//STEP3, 在鍵值對的最後加上key=API_KEY
if key != "" {
signStrings = signStrings + "key=" + key
}
log4go.Debug("wxpayCalcSign()...signStrings:%s", signStrings)
//STEP4, 進行MD5簽名並且將所有字元轉為大寫.
md5Ctx := md5.New()
md5Ctx.Write([]byte(signStrings))
cipherStr := md5Ctx.Sum(nil)
upperSign := strings.ToUpper(hex.EncodeToString(cipherStr))
return upperSign
}
func (o *APIHandler) wxUnifyChargeReq(userId int64, orderNo string) (string, error) {
log4go.Debug("wxUnifyChargeReq()...userId:%d, orderNo:%s", userId, orderNo)
bookOrder, err := o.GetOrderByOrderNoDb(orderNo)
if err != nil {
log4go.Error("wxUnifyChargeReq(): GetOrderByOrderNoDb error.")
return "", err
}
nonceStr := GetRandomString(32)
//請求UnifiedOrder的代碼
var yourReq UnifyOrderReq
yourReq.Appid = WX_APP_ID //微信開放平臺我們創建出來的app的app id
yourReq.Body = bookOrder.LineNum
yourReq.Mch_id = WX_MCH_ID
yourReq.Nonce_str = nonceStr
yourReq.Notify_url = WX_NOTIFY_URL
yourReq.Trade_type = "APP"
yourReq.Spbill_create_ip = WX_INVOKE_API_IP
yourReq.Total_fee = int(bookOrder.TotalPrice * 100) //單位是分
yourReq.Out_trade_no = orderNo
var m map[string]interface{}
m = make(map[string]interface{}, 0)
m["appid"] = yourReq.Appid
m["body"] = yourReq.Body
m["mch_id"] = yourReq.Mch_id
m["notify_url"] = yourReq.Notify_url
m["trade_type"] = yourReq.Trade_type
m["spbill_create_ip"] = yourReq.Spbill_create_ip
m["total_fee"] = yourReq.Total_fee
m["out_trade_no"] = yourReq.Out_trade_no
m["nonce_str"] = yourReq.Nonce_str
yourReq.Sign = o.wxpayCalcSign(m, WX_PAY_KEY) // 這個是計算wxpay簽名的函數上面已貼出
bytes_req, err := xml.Marshal(yourReq)
if err != nil {
log4go.Error("wxUnifyChargeReq(): xml.Marshal error:%s", err)
return "", err
}
str_req := string(bytes_req)
//wxpay的unifiedorder介面需要http body中xmldoc的根節點是<xml></xml>這種，所以這裡需要replace一下
str_req = strings.Replace(str_req, "XUnifyOrderReq", "xml", -1)
bytes_req = []byte(str_req)
log4go.Debug("wxUnifyChargeReq()...str_req:%s", str_req)
//發送unified order請求.
req, err := http.NewRequest("POST", WX_UNIFIEDORDER_API, bytes.NewReader(bytes_req))
if err != nil {
log4go.Error("wxUnifyChargeReq(): http.NewRequest error:%s", err)
return "", err
}
req.Header.Set("Accept", "application/xml")
//這裡的http header的設置是必須設置的.
req.Header.Set("Content-Type", "application/xml;charset=utf-8")
c := http.Client{}
resp, _err := c.Do(req)
if _err != nil {
log4go.Error("wxUnifyChargeReq(): http.Do error:%s", _err)
return "", err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
retXml := string(body)
log4go.Debug("wxUnifyChargeReq()...retXml:%s", retXml)
if err != nil {
return "", err
}
return retXml, nil
}
2、驗簽(待續)
