JSAPI 接口

JSAPI 接口使用前，请在后台设置支付目录

JSAPI 接口请求步骤：

1. 参照《获取 OPENID》章节，获得 OPENID
2. 通过该 api 构造订单参数获取 jsapi 支付参数
3. 通过 jssdk 或 WeixinJsBridge 方式自行发起支付
4. 服务端接收异步通知

请求地址：https://payjs.cn/api/jsapi

请求参数：

请求返回：

JSAPI 请求 DEMO:

<?php
// 引入 payjs.class.php
// 项目地址：https://github.com/payjs-cn/phpsdk

include("payjs.class.php");

$mchid = '123456';
$key = 'xxxxxx';

$data = [
    'body'         => 'test',         // 订单标题
    'out_trade_no' => time(),         // 订单号
    'total_fee'    => 120,            // 金额,单位:分
    'openid'       => 'xxxxxxxxxxx',  // 通过openid接口获取到的openid
];

$payjs = new Payjs($mchid, $key);
$result = $payjs->jsapi($data);

print_r($result);

<?php
// 引入 payjs.class.php
// 项目地址：https://github.com/payjs-cn/phpsdk

include("payjs.class.php");

$mchid = '123456';
$key = 'xxxxxx';

$data = [
    'body'         => 'test',         // 订单标题
    'out_trade_no' => time(),         // 订单号
    'total_fee'    => 120,            // 金额,单位:分
    'openid'       => 'xxxxxxxxxxx',  // 通过openid接口获取到的openid
];

$payjs = new Payjs($mchid, $key);
$result = $payjs->jsapi($data);

print_r($result);

# !/usr/bin/env Python3
# -*- coding: utf-8 -*-
import requests
import time
import hashlib
from urllib.parse import urlencode,unquote
'''
JSAPI 支付
'''
key = ''        # 填写通信密钥
mchid = ''      # 特写商户号

time = str(int(time.time()))
order = {
    'body'         : 'test',        # 订单标题
    'out_trade_no' : time,          # 订单号
    'total_fee'    : 120,           # 金额,单位:分
    'openid'       : 'xxxxxxxxxxx'  # 通过openid接口获取到的openid
}

# 构造签名函数
def sign(attributes):
    attributes_new = {k: attributes[k] for k in sorted(attributes.keys())}
    return hashlib.md5((unquote(urlencode(attributes_new))+'&key='+key)
        .encode(encoding='utf-8')).hexdigest().upper()

order['sign'] = sign(order)
request_url = "https://payjs.cn/api/jsapi"
# 返回结果中包含`jsapi`字段，该字段的值即是前端发起时所需的6个支付参数
headers = {'content-type': 'application/x-www-form-urlencoded'}
response = requests.post(request_url, data=order,headers=headers)
if response:
    print(response.json())

package main

import (
    "fmt"
    "strings"
    "net/http"
    "net/url"
    "io/ioutil"
)

func main(){
    data := url.Values{"mchid":{"XXX"}, "total_fee":{"1"}, "out_trade_no":{"123123"}, 
        "openid":{"XXX"}, "sign":{"XXX"}}
    data2 := strings.NewReader(data.Encode())
    resp, err := http.Post("https://payjs.cn/api/jsapi", "application/x-www-form-urlencoded", data2)
    if err != nil {
        fmt.Println(err)
    }
    defer resp.Body.Close()
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        // handle error
    }

    fmt.Println(string(body))
}

// 项目地址：https://github.com/payjs-cn/demo-nodejs
// 首先引入文件，并在config.js中配置商户号和通信密钥
var cfg = require("./config.js"); 
var pay = require("./pay.js");

var params = {
  'total_fee': 1,              //金额。单位：分
  'out_trade_no': '123456789', //用户端自主生成的订单号
  'body': '订单标题',           //订单标题
  'notify_url': '',             //接收微信支付异步通知的回调地址。必须为可直接访问的URL，不能带参数、session验证、csrf验证。留空则不通知
  'openid': '',                 // 通过openapi接口获取到的openid
};

pay.jsapi(params,function (msg) {
    console.log(msg);
    /**TODO 这里处理业务逻辑 */
});

// 完整代码：https://github.com/payjs-cn/demo-java
public Object Jsapi() {

    Map<String,String> payData = new HashMap<>();
    payData.put("mchid", PayjsConfig.mchid);
    payData.put("total_fee", "100");
    payData.put("out_trade_no", "83432749"); // 订单号 随便输的，自己生成一下就好了
    payData.put("openid", "xxxxxxxxxxxxxx"); // 根据openid接口获取到的openid
    payData.put("body","订单标题");
    payData.put("attach","自定义数据");
    payData.put("notify_url", "https://你的域名/api/pay/notify");

    // 进行sign签名
    payData.put("sign", sign(payData, PayjsConfig.key));

    // 请求payjs
    String result = HttpsUtils.sendPost(PayjsConfig.jsapiUrl, JSON.toJSONString(payData),null);

    // 接口返回数据
    return JSON.parseObject(result);
}

// 完整项目地址：https://github.com/payjs-cn/sdk-csharp

Payjs pay = new Payjs("YOUR MCHID", "YOUR KEY");

Dictionary<string, string> param = new Dictionary<string, string>();
param["total_fee"] = "1";
param["out_trade_no"] = DateTime.Now.Ticks.ToString();
param["body"] = "test";
param["attch"] = "user id";
param["notify_url"] = "YOUR notify_url";
param["openid"] = "user's openid";//获取用户openid：https://help.payjs.cn/api-lie-biao/huo-qu-openid.html

//返回原始json字符串
string jsonString = pay.jsapi(param);

前端发起支付演示代码:

<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <meta name="viewport" content="initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <meta name="format-detection" content="telephone=no">
    <meta name="format-detection" content="email=no">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <link href="https://cdn.bootcss.com/weui/1.1.2/style/weui.min.css" rel="stylesheet">
    <script src="https://cdn.bootcss.com/zepto/1.2.0/zepto.min.js"></script>
</head>
<body style="padding:20px;">
<a href="javascript:;" class="weui-btn weui-btn_primary" id="payBtn">微信支付</a>
</body>
<script>
    if (typeof WeixinJSBridge == "undefined") {
        if (document.addEventListener) {
            document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
        } else if (document.attachEvent) {
            document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
            document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
        }
    }
    function onBridgeReady() {
        WeixinJSBridge.call('hideOptionMenu');
    }
    $('#payBtn').on('click', function () {
        WeixinJSBridge.invoke(
                'getBrandWCPayRequest', {
                    // 以下6个支付参数通过payjs的jsapi接口获取
                    // **************************
                    "appId": "wxc5205a653b0259ac",
                    "timeStamp": "15100000000",
                    "nonceStr": "9cJEu27X6KehHGM8",
                    "package": "prepay_id=wx162234040923141245861167",
                    "signType": "MD5",
                    "paySign": "D64EF3ADBCA224E435D321619710C008"
                    // **************************
                },
                function (res) {
                    if (res.err_msg == "get_brand_wcpay_request:ok") {
                        WeixinJSBridge.call('closeWindow');
                    }
                }
        );
    });
</script>