python-支付宝支付示例

项目演示：

1、输入金额

2、扫码支付：

3、支付完成：

一、注册账号

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

二、设置应用公钥

三、代码实现

1、项目结构：

        

2、把生成的     应用私钥     和    支付宝的公钥       放入keys目录下：

    注意：
支付宝公钥

商户私钥

 --- 配置商户应用私钥--copy到key目录下

            

            

--- 配置支付宝公钥--进入网页-->查看支付宝公钥-->把公钥放到key目录下

            

但是要做修改：

alipay_public_2048.txt
    -----BEGIN PUBLIC KEY-----  # 加上这行
        支付宝的公钥
    -----END PUBLIC KEY-----   # 同上

app_private_2048.txt
    -----BEGIN PUBLIC KEY-----  #同上
        应用的私钥
    -----END PUBLIC KEY-----   # 同上

3、pay.py 这是从git上找到的支付宝支付接口(PC端支付接口) 

            

in pay.py

from datetime import datetime
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from urllib.parse import quote_plus
from urllib.parse import urlparse, parse_qs
from base64 import decodebytes, encodebytes
import json

class AliPay(object):
    """
    支付宝支付接口(PC端支付接口)
    """

    def __init__(self, appid, app_notify_url, app_private_key_path,
                 alipay_public_key_path, return_url, debug=False):
        self.appid = appid
        self.app_notify_url = app_notify_url
        self.app_private_key_path = app_private_key_path
        self.app_private_key = None
        self.return_url = return_url
        with open(self.app_private_key_path) as fp:
            self.app_private_key = RSA.importKey(fp.read())
        self.alipay_public_key_path = alipay_public_key_path
        with open(self.alipay_public_key_path) as fp:
            self.alipay_public_key = RSA.importKey(fp.read())

        if debug is True:
            self.__gateway = "https://openapi.alipaydev.com/gateway.do"
        else:
            self.__gateway = "https://openapi.alipay.com/gateway.do"

    def direct_pay(self, subject, out_trade_no, total_amount, return_url=None, **kwargs):
        biz_content = {
            "subject": subject,
            "out_trade_no": out_trade_no,
            "total_amount": total_amount,
            "product_code": "FAST_INSTANT_TRADE_PAY",
            # "qr_pay_mode":4
        }

        biz_content.update(kwargs)
        data = self.build_body("alipay.trade.page.pay", biz_content, self.return_url)
        return self.sign_data(data)

    def build_body(self, method, biz_content, return_url=None):
        data = {
            "app_id": self.appid,
            "method": method,
            "charset": "utf-8",
            "sign_type": "RSA2",
            "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
            "version": "1.0",
            "biz_content": biz_content
        }

        if return_url is not None:
            data["notify_url"] = self.app_notify_url
            data["return_url"] = self.return_url

        return data

    def sign_data(self, data):
        data.pop("sign", None)
        # 排序后的字符串
        unsigned_items = self.ordered_data(data)
        unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)
        sign = self.sign(unsigned_string.encode("utf-8"))
        # ordered_items = self.ordered_data(data)
        quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsigned_items)

        # 获得最终的订单信息字符串
        signed_string = quoted_string + "&sign=" + quote_plus(sign)
        return signed_string

    def ordered_data(self, data):
        complex_keys = []
        for key, value in data.items():
            if isinstance(value, dict):
                complex_keys.append(key)

        # 将字典类型的数据dump出来
        for key in complex_keys:
            data[key] = json.dumps(data[key], separators=(',', ':'))

        return sorted([(k, v) for k, v in data.items()])

    def sign(self, unsigned_string):
        # 开始计算签名
        key = self.app_private_key
        signer = PKCS1_v1_5.new(key)
        signature = signer.sign(SHA256.new(unsigned_string))
        # base64 编码，转换为unicode表示并移除回车
        sign = encodebytes(signature).decode("utf8").replace("
", "")
        return sign

    def _verify(self, raw_content, signature):
        # 开始计算签名
        key = self.alipay_public_key
        signer = PKCS1_v1_5.new(key)
        digest = SHA256.new()
        digest.update(raw_content.encode("utf8"))
        if signer.verify(digest, decodebytes(signature.encode("utf8"))):
            return True
        return False

    def verify(self, data, signature):
        if "sign_type" in data:
            sign_type = data.pop("sign_type")
        # 排序后的字符串
        unsigned_items = self.ordered_data(data)
        message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
        return self._verify(message, signature)

3、路由设置

in urls.py
    urlpatterns = [
        url(r'^admin/', admin.site.urls),
        url(r'^page1/', views.page1),
            url(r'^index/', views.index),
        url(r'^page2/', views.page2),
    ]

4、视图设置

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


    def get_ali_object():
        # 沙箱环境地址：https://openhome.alipay.com/platform/appDaily.htm?tab=info
        app_id = "2016091100486897"  #  APPID （沙箱应用）

        # 支付完成后，支付偷偷向这里地址发送一个post请求，识别公网IP,如果是 192.168.20.13局域网IP ,支付宝找不到，def page2()
            # 接收不到这个请求
        notify_url = "http://47.94.172.250:8804/page2/"

        # 支付完成后，跳转的地址。
        return_url = "http://47.94.172.250:8804/page2/"

        merchant_private_key_path = "keys/app_private_2048.txt" # 应用私钥
        alipay_public_key_path = "keys/alipay_public_2048.txt"  # 支付宝公钥

        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):
        # 根据当前用户的配置，生成URL，并跳转。
        money = float(request.POST.get('money'))

        alipay = get_ali_object()

        # 生成支付的url
        query_params = alipay.direct_pay(
            subject="充气式赵俊明",  # 商品简单描述
            out_trade_no="x2" + str(time.time()),  # 用户购买的商品订单号（每次不一样） 20180301073422891
            total_amount=money,  # 交易金额(单位: 元 保留俩位小数)
        )

        pay_url = "https://openapi.alipaydev.com/gateway.do?{0}".format(query_params)  # 支付宝网关地址（沙箱应用）

        return redirect(pay_url)


    def page2(request):
        alipay = get_ali_object()
        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
            # name&age=123....
            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]

            # post_dict有10key： 9 ，1
            sign = post_dict.pop('sign', None)
            status = alipay.verify(post_dict, sign)
            print('------------------开始------------------')
            print('POST验证', status)
            print(post_dict)
            out_trade_no = post_dict['out_trade_no']

            # 修改订单状态
            # models.Order.objects.filter(trade_no=out_trade_no).update(status=2)
            print('------------------结束------------------')
            # 修改订单状态：获取订单号
            return HttpResponse('POST返回')

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

5、模板

in index.html

<!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>

6、当你全部设置完，代码只需修改三个地方

git项目地址：https://github.com/zhbittt/s5alipay.git

    (1)、修改APPID

        -- 这是你账号的APPID

         

       -- in  views.py

                   def  get_ali_object():

                        app_id = 'xxxxxxx' #你的账号APPID  

================================

    (2)、换上你的支付宝公钥

    (3)、换上你的应用私钥