微信小程序支付接入注意点

<?php
/**
*微信小程序支付后台交易程序
**/
require_once "../lib/WxPay.Api.php";
require_once "WxPay.Config.php";
require_once 'log.php';
header('Access-Control-Allow-Origin:*');//注意！跨域要加这个头
header("Access-Control-Allow-Method:POST,GET");
/*
* 初始化日志
*
*/
$logHandler= new CLogFileHandler("../logs/".date('Y-m-d').'.log');
$log = Log::Init($logHandler); if($_SERVER['REQUEST_METHOD'] != 'POST'){
return_err('error request method');
}
log::info("*****交易开始*****");
//$info = json_encode($_POST);
//log::info($info);
try{
$openid = $_POST['openid'];//openid 微信唯一识别码
$body = $_POST['body'];//设置商品或支付单简要描述
$order_sn = $_POST['order_sn'];//订单号
$total_fee = $_POST['total_fee'];//付款金额
log::info('*****获取post值开始*****');
log::info($openid);
log::info($body);
log::info($order_sn);
log::info($total_fee);
log::info('*****获取post值结束*****');
/*统一下单*/
$input = new WxPayUnifiedOrder();
$input->SetBody($body);//设置商品或支付单简要描述
$input->SetAttach($body);//设置附加数据，在查询API和支付通知中原样返回，该字段主要用于商户携带订单的自定义数据
$input->SetOut_trade_no($order_sn);//设置商户系统内部的订单号,32个字符内、可包含字母, 其他说明见商户订单号
$input->SetTotal_fee($total_fee);//设置订单总金额，只能为整数，详见支付金额
$input->SetTime_start(date("YmdHis"));
$input->SetTime_expire(date("YmdHis", time() + 600));
//$input->SetGoods_tag("test");//设置商品标记，代金券或立减优惠功能的参数，说明详见代金券或立减优惠
$input->SetNotify_url( 'https://'.$_SERVER['HTTP_HOST'].'/notify.php');
$input->SetTrade_type("JSAPI");
$input->SetOpenid($openid);
$config = new WxPayConfig();
$order = WxPayApi::unifiedOrder($config, $input);
return_data($order); } catch(Exception $e) {
log::info('*****异常错误开始*****');
}
/**
* 错误返回提示
* @param string $errMsg 错误信息
* @param string $status 错误码
* @return json的数据
*/
function return_err($errMsg='error',$status=0){
$ret_str = json_encode(array('status'=>$status,'result'=>'fail','errmsg'=>$errMsg));
Log::ERROR("error request method");
exit($ret_str);
}
/**
* 正确返回
* @param array $data 要返回的数组
* @return json的数据
*/
function return_data($data=array()){
$ret_str = json_encode(array('status'=>1,'result'=>'success','data'=>$data));
log::INFO($ret_str);
exit($ret_str);
}

url: app.globalData.urlWxpayPath,
method: "POST",
header: {
'content-type': 'application/x-www-form-urlencoded'
},
data: {
"openid": app.globalData.openid,
"body": body,
"order_sn": order_sn,
"total_fee": Number(totalprice)*100 //微信支付是以分为单位的，要转换成元为单位。
},
success: function (res) {
//console.log(res);
//console.log(new Date().bv ().toString());
var appid = res.data.data.appid;
var mch_id = res.data.data.mch_id;
var prepay_id = res.data.data.prepay_id;
var sign = res.data.data.sign;
var trade_type = res.data.data.trade_type;
var timeStamp = new Date().getTime().toString();//时间戳
var nonceStr = res.data.data.nonce_str;
var signType = 'MD5';
const key = app.globalData.key;//key为商户的支付密钥，微信后台页面可以查询到。
var pg = 'prepay_id=' + res.data.data.prepay_id;
//md5加密
var paySign = utils.hexMD5('appId=' + appid + '&nonceStr=' + nonceStr + '&package=' + pg + '&signType=' + signType + '&timeStamp=' + timeStamp + '&key=' + key);
//console.log(paySign.toUpperCase());
wx.requestPayment({
timeStamp: timeStamp,
nonceStr: nonceStr,
package: pg,
signType: 'MD5',
paySign: paySign.toUpperCase(),
success: function (res) { //接口调用成功的回调函数
//console.log(res)
wx.showToast({
title: '支付成功',
icon: 'none',
duration: 2000
})
},
fail: function (res) { //接口调用失败的回调函数
wx.showToast({
title: '支付失败',
icon: 'none',
duration: 2000
})
},
complete: function (res) { //接口调用结束的回调函数（调用成功、失败都会执行）
console.log(res);
}
}) } })
}

/*
* A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
* Digest Algorithm, as defined in RFC 1321.
* Version 1.1 Copyright (C) Paul Johnston 1999 - 2002.
* Code also contributed by Greg Holt
* See http://pajhome.org.uk/site/legal.html for details.
*//*
* Add integers, wrapping at 2^32. This uses 16-bit operations internally
* to work around bugs in some JS interpreters.
*/
function safe_add(x, y) {
var lsw = (x & 0xFFFF) + (y & 0xFFFF)
var msw = (x >> 16) + (y >> 16) + (lsw >> 16)
return (msw << 16) | (lsw & 0xFFFF)
}/*
* Bitwise rotate a 32-bit number to the left.
*/
function rol(num, cnt) {
return (num << cnt) | (num >>> (32 - cnt))
}/*
* These functions implement the four basic operations the algorithm uses.
*/
function cmn(q, a, b, x, s, t) {
return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
}
function ff(a, b, c, d, x, s, t) {
return cmn((b & c) | ((~b) & d), a, b, x, s, t)
}
function gg(a, b, c, d, x, s, t) {
return cmn((b & d) | (c & (~d)), a, b, x, s, t)
}
function hh(a, b, c, d, x, s, t) {
return cmn(b ^ c ^ d, a, b, x, s, t)
}
function ii(a, b, c, d, x, s, t) {
return cmn(c ^ (b | (~d)), a, b, x, s, t)
}/*
* Calculate the MD5 of an array of little-endian words, producing an array
* of little-endian words.
*/
function coreMD5(x) {
var a = 1732584193
var b = -271733879
var c = -1732584194
var d = 271733878 for (var i = 0; i < x.length; i += 16) {
var olda = a
var oldb = b
var oldc = c
var oldd = d a = ff(a, b, c, d, x[i + 0], 7, -680876936)
d = ff(d, a, b, c, x[i + 1], 12, -389564586)
c = ff(c, d, a, b, x[i + 2], 17, 606105819)
b = ff(b, c, d, a, x[i + 3], 22, -1044525330)
a = ff(a, b, c, d, x[i + 4], 7, -176418897)
d = ff(d, a, b, c, x[i + 5], 12, 1200080426)
c = ff(c, d, a, b, x[i + 6], 17, -1473231341)
b = ff(b, c, d, a, x[i + 7], 22, -45705983)
a = ff(a, b, c, d, x[i + 8], 7, 1770035416)
d = ff(d, a, b, c, x[i + 9], 12, -1958414417)
c = ff(c, d, a, b, x[i + 10], 17, -42063)
b = ff(b, c, d, a, x[i + 11], 22, -1990404162)
a = ff(a, b, c, d, x[i + 12], 7, 1804603682)
d = ff(d, a, b, c, x[i + 13], 12, -40341101)
c = ff(c, d, a, b, x[i + 14], 17, -1502002290)
b = ff(b, c, d, a, x[i + 15], 22, 1236535329) a = gg(a, b, c, d, x[i + 1], 5, -165796510)
d = gg(d, a, b, c, x[i + 6], 9, -1069501632)
c = gg(c, d, a, b, x[i + 11], 14, 643717713)
b = gg(b, c, d, a, x[i + 0], 20, -373897302)
a = gg(a, b, c, d, x[i + 5], 5, -701558691)
d = gg(d, a, b, c, x[i + 10], 9, 38016083)
c = gg(c, d, a, b, x[i + 15], 14, -660478335)
b = gg(b, c, d, a, x[i + 4], 20, -405537848)
a = gg(a, b, c, d, x[i + 9], 5, 568446438)
d = gg(d, a, b, c, x[i + 14], 9, -1019803690)
c = gg(c, d, a, b, x[i + 3], 14, -187363961)
b = gg(b, c, d, a, x[i + 8], 20, 1163531501)
a = gg(a, b, c, d, x[i + 13], 5, -1444681467)
d = gg(d, a, b, c, x[i + 2], 9, -51403784)
c = gg(c, d, a, b, x[i + 7], 14, 1735328473)
b = gg(b, c, d, a, x[i + 12], 20, -1926607734) a = hh(a, b, c, d, x[i + 5], 4, -378558)
d = hh(d, a, b, c, x[i + 8], 11, -2022574463)
c = hh(c, d, a, b, x[i + 11], 16, 1839030562)
b = hh(b, c, d, a, x[i + 14], 23, -35309556)
a = hh(a, b, c, d, x[i + 1], 4, -1530992060)
d = hh(d, a, b, c, x[i + 4], 11, 1272893353)
c = hh(c, d, a, b, x[i + 7], 16, -155497632)
b = hh(b, c, d, a, x[i + 10], 23, -1094730640)
a = hh(a, b, c, d, x[i + 13], 4, 681279174)
d = hh(d, a, b, c, x[i + 0], 11, -358537222)
c = hh(c, d, a, b, x[i + 3], 16, -722521979)
b = hh(b, c, d, a, x[i + 6], 23, 76029189)
a = hh(a, b, c, d, x[i + 9], 4, -640364487)
d = hh(d, a, b, c, x[i + 12], 11, -421815835)
c = hh(c, d, a, b, x[i + 15], 16, 530742520)
b = hh(b, c, d, a, x[i + 2], 23, -995338651) a = ii(a, b, c, d, x[i + 0], 6, -198630844)
d = ii(d, a, b, c, x[i + 7], 10, 1126891415)
c = ii(c, d, a, b, x[i + 14], 15, -1416354905)
b = ii(b, c, d, a, x[i + 5], 21, -57434055)
a = ii(a, b, c, d, x[i + 12], 6, 1700485571)
d = ii(d, a, b, c, x[i + 3], 10, -1894986606)
c = ii(c, d, a, b, x[i + 10], 15, -1051523)
b = ii(b, c, d, a, x[i + 1], 21, -2054922799)
a = ii(a, b, c, d, x[i + 8], 6, 1873313359)
d = ii(d, a, b, c, x[i + 15], 10, -30611744)
c = ii(c, d, a, b, x[i + 6], 15, -1560198380)
b = ii(b, c, d, a, x[i + 13], 21, 1309151649)
a = ii(a, b, c, d, x[i + 4], 6, -145523070)
d = ii(d, a, b, c, x[i + 11], 10, -1120210379)
c = ii(c, d, a, b, x[i + 2], 15, 718787259)
b = ii(b, c, d, a, x[i + 9], 21, -343485551) a = safe_add(a, olda)
b = safe_add(b, oldb)
c = safe_add(c, oldc)
d = safe_add(d, oldd)
}
return [a, b, c, d]
}/*
* Convert an array of little-endian words to a hex string.
*/
function binl2hex(binarray) {
var hex_tab = "0123456789abcdef"
var str = ""
for (var i = 0; i < binarray.length * 4; i++) {
str += hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) +
hex_tab.charAt((binarray[i >> 2] >> ((i % 4) * 8)) & 0xF)
}
return str
}/*
* Convert an array of little-endian words to a base64 encoded string.
*/
function binl2b64(binarray) {
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
var str = ""
for (var i = 0; i < binarray.length * 32; i += 6) {
str += tab.charAt(((binarray[i >> 5] << (i % 32)) & 0x3F) |
((binarray[i >> 5 + 1] >> (32 - i % 32)) & 0x3F))
}
return str
}/*
* Convert an 8-bit character string to a sequence of 16-word blocks, stored
* as an array, and append appropriate padding for MD4/5 calculation.
* If any of the characters are >255, the high byte is silently ignored.
*/
function str2binl(str) {
var nblk = ((str.length + 8) >> 6) + 1 // number of 16-word blocks
var blks = new Array(nblk * 16)
for (var i = 0; i < nblk * 16; i++) blks[i] = 0
for (var i = 0; i < str.length; i++)
blks[i >> 2] |= (str.charCodeAt(i) & 0xFF) << ((i % 4) * 8)
blks[i >> 2] |= 0x80 << ((i % 4) * 8)
blks[nblk * 16 - 2] = str.length * 8
return blks
}/*
* Convert a wide-character string to a sequence of 16-word blocks, stored as
* an array, and append appropriate padding for MD4/5 calculation.
*/
function strw2binl(str) {
var nblk = ((str.length + 4) >> 5) + 1 // number of 16-word blocks
var blks = new Array(nblk * 16)
for (var i = 0; i < nblk * 16; i++) blks[i] = 0
for (var i = 0; i < str.length; i++)
blks[i >> 1] |= str.charCodeAt(i) << ((i % 2) * 16)
blks[i >> 1] |= 0x80 << ((i % 2) * 16)
blks[nblk * 16 - 2] = str.length * 16
return blks
}/*
* External interface
*/
function hexMD5(str) { return binl2hex(coreMD5(str2binl(str))) }
function hexMD5w(str) { return binl2hex(coreMD5(strw2binl(str))) }
function b64MD5(str) { return binl2b64(coreMD5(str2binl(str))) }
function b64MD5w(str) { return binl2b64(coreMD5(strw2binl(str))) }
/* Backward compatibility */
function calcMD5(str) { return binl2hex(coreMD5(str2binl(str))) }
module.exports = {
hexMD5: hexMD5
}