支付宝支付流程

Posted 2020-10-26 不_一

注意：
保存

　　支付宝公钥（通过商户公钥生成）
　　商户私钥

settings.py中ALLOWED_HOSTS=["*"]

点击支付，发送POST请求，提供商品信息及订单号（唯一标识），根据支付宝SDK的配置，首先发送发送POST请求，进行支付验证，支付成功后，根据订单号，修改订单状态，失败则不修改，然后展示支付结果，最后跳转回设定好的商户URL页面

根据当前用户的配置（支付时发送POST请求的地址（用于验证支付成功与否），支付完成后跳转的商户地址，支付宝公钥，商户私钥），生成URL，并跳转到扫码支付页面。
上面两个地址相当于回调函数（）

1.项目展示：

2.扫码支付

3.支付完成

4.跳转成功

一、注册账号

https://openhome.alipay.com/platform/appDaily.htm?tab=info

二、设置应用公钥

私钥需要复制到程序里的：

程序里面阿里的公钥在这里获取：

、

 

这里放的是阿里的公钥。

代码实现：

  代码结构：

      1. 首先是：更改程序里面的阿里公钥和用户私钥以及app_id

      2.pay.py 这是从git上找到的支付宝支付接口(PC端支付接口) 

    3、  

  1 from datetime import datetime
  2 from Crypto.PublicKey import RSA
  3 from Crypto.Signature import PKCS1_v1_5
  4 from Crypto.Hash import SHA256
  5 from urllib.parse import quote_plus
  6 from urllib.parse import urlparse, parse_qs
  7 from base64 import decodebytes, encodebytes
  8 import json
  9 
 10 class AliPay(object):
 11     """
 12     支付宝支付接口(PC端支付接口)
 13     """
 14 
 15     def __init__(self, appid, app_notify_url, app_private_key_path,
 16                  alipay_public_key_path, return_url, debug=False):
 17         self.appid = appid
 18         self.app_notify_url = app_notify_url
 19         self.app_private_key_path = app_private_key_path
 20         self.app_private_key = None
 21         self.return_url = return_url
 22         with open(self.app_private_key_path) as fp:
 23             self.app_private_key = RSA.importKey(fp.read())
 24         self.alipay_public_key_path = alipay_public_key_path
 25         with open(self.alipay_public_key_path) as fp:
 26             self.alipay_public_key = RSA.importKey(fp.read())
 27 
 28         if debug is True:
 29             self.__gateway = "https://openapi.alipaydev.com/gateway.do"
 30         else:
 31             self.__gateway = "https://openapi.alipay.com/gateway.do"
 32 
 33     def direct_pay(self, subject, out_trade_no, total_amount, return_url=None, **kwargs):
 34         biz_content = {
 35             "subject": subject,
 36             "out_trade_no": out_trade_no,
 37             "total_amount": total_amount,
 38             "product_code": "FAST_INSTANT_TRADE_PAY",
 39             # "qr_pay_mode":4
 40         }
 41 
 42         biz_content.update(kwargs)
 43         data = self.build_body("alipay.trade.page.pay", biz_content, self.return_url)
 44         return self.sign_data(data)
 45 
 46     def build_body(self, method, biz_content, return_url=None):
 47         data = {
 48             "app_id": self.appid,
 49             "method": method,
 50             "charset": "utf-8",
 51             "sign_type": "RSA2",
 52             "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
 53             "version": "1.0",
 54             "biz_content": biz_content
 55         }
 56 
 57         if return_url is not None:
 58             data["notify_url"] = self.app_notify_url
 59             data["return_url"] = self.return_url
 60 
 61         return data
 62 
 63     def sign_data(self, data):
 64         data.pop("sign", None)
 65         # 排序后的字符串
 66         unsigned_items = self.ordered_data(data)
 67         unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)
 68         sign = self.sign(unsigned_string.encode("utf-8"))
 69         # ordered_items = self.ordered_data(data)
 70         quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsigned_items)
 71 
 72         # 获得最终的订单信息字符串
 73         signed_string = quoted_string + "&sign=" + quote_plus(sign)
 74         return signed_string
 75 
 76     def ordered_data(self, data):
 77         complex_keys = []
 78         for key, value in data.items():
 79             if isinstance(value, dict):
 80                 complex_keys.append(key)
 81 
 82         # 将字典类型的数据dump出来
 83         for key in complex_keys:
 84             data[key] = json.dumps(data[key], separators=(\',\', \':\'))
 85 
 86         return sorted([(k, v) for k, v in data.items()])
 87 
 88     def sign(self, unsigned_string):
 89         # 开始计算签名
 90         key = self.app_private_key
 91         signer = PKCS1_v1_5.new(key)
 92         signature = signer.sign(SHA256.new(unsigned_string))
 93         # base64 编码，转换为unicode表示并移除回车
 94         sign = encodebytes(signature).decode("utf8").replace("\\n", "")
 95         return sign
 96 
 97     def _verify(self, raw_content, signature):
 98         # 开始计算签名
 99         key = self.alipay_public_key
100         signer = PKCS1_v1_5.new(key)
101         digest = SHA256.new()
102         digest.update(raw_content.encode("utf8"))
103         if signer.verify(digest, decodebytes(signature.encode("utf8"))):
104             return True
105         return False
106 
107     def verify(self, data, signature):
108         if "sign_type" in data:
109             sign_type = data.pop("sign_type")
110         # 排序后的字符串
111         unsigned_items = self.ordered_data(data)
112         message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
113         return self._verify(message, signature)

支付函数

    4.路由设置：

from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
    url(r\'^admin/\', admin.site.urls),
    url(r\'^page1/\', views.page1),
    url(r\'^index/\', views.index),
    url(r\'^page2/\', views.page2),
]

   5.视图：

from django.shortcuts import render, redirect, HttpResponse
from utils.pay import AliPay
import json
import time


def ali():
    # 沙箱环境地址：https://openhome.alipay.com/platform/appDaily.htm?tab=info
    app_id = "2016091100483151"
    # POST请求，用于最后的检测
    notify_url = "http://127.0.0.1:8804/page2/"
    # notify_url = "http://www.wupeiqi.com:8804/page2/"

    # GET请求，用于页面的跳转展示
    return_url = "http://127.0.0.1:8804/page2/"
    # return_url = "http://www.wupeiqi.com:8804/page2/"

    merchant_private_key_path = "keys/app_private_2048.txt"
    alipay_public_key_path = "keys/alipay_public_2048.txt"

    alipay = AliPay(
        appid=app_id,
        app_notify_url=notify_url,
        return_url=return_url,
        app_private_key_path=merchant_private_key_path,
        alipay_public_key_path=alipay_public_key_path,  # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥
        debug=True,  # 默认False,
    )
    return alipay
def index(request):
            return render(request,\'index.html\')

def page1(request):
    if request.method == "GET":
        return render(request, \'index.html\')
    else:
        money = float(request.POST.get(\'money\'))
        alipay = ali()
        # 生成支付的url
        query_params = alipay.direct_pay(
            subject="充气式韩红",  # 商品简单描述
            out_trade_no="x2" + str(time.time()),  # 商户订单号
            total_amount=money,  # 交易金额(单位: 元 保留俩位小数)
        )

        pay_url = "https://openapi.alipaydev.com/gateway.do?{}".format(query_params)

        return redirect(pay_url)


def page2(request):
    alipay = ali()
    if request.method == "POST":
        # 检测是否支付成功
        # 去请求体中获取所有返回的数据：状态/订单号
        from urllib.parse import parse_qs
        body_str = request.body.decode(\'utf-8\')
        post_data = parse_qs(body_str)

        post_dict = {}
        for k, v in post_data.items():
            post_dict[k] = v[0]
        print(post_dict)

        sign = post_dict.pop(\'sign\', None)
        status = alipay.verify(post_dict, sign)
        print(\'POST验证\', status)
        return HttpResponse(\'POST返回\')

    else:
        params = request.GET.dict()
        sign = params.pop(\'sign\', None)
        status = alipay.verify(params, sign)
        print(\'GET验证\', status)
        return HttpResponse(\'支付成功\')

     6.模板

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="dist/css/bootstrap.css">
</head>
<body>
    <form  action="/page1/" method="POST">
        {% csrf_token %}
        <input type="text" name="money">
        <input type="submit" value="去支付" />
    </form>

<script></script>
</body>
</html>

注意：安装Crypto

   把安装包放到C:\\Users\\frank\\AppData\\Local\\Programs\\Python\\Python36\\Lib\\site-packages   然后解压缩就行了。