python -- 支付宝支付功能

flask -- 支付宝支付

坑点:

调用支付宝接口时出现“系统繁忙,请稍后再试”时,检查订单号是否有小数点,有的话去掉

用自己的公钥换取支付宝公钥

异步回调需要在线上完成

支付宝支付时收不到验证码:  需要将沙箱环境换成线上环境

 

alipay.py

import os
from datetime import datetime
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from urllib.parse import quote_plus
from base64 import decodebytes, encodebytes
import json


# 支付宝封装(不需要做任何修改)
from Cryptodome.PublicKey import RSA


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

    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.import_key(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.wap.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 ordered_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("\n", "")
        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)


# 初始化操作
# 设置秘钥公钥的存放路径
app_private_key_path = os.path.join(os.path.dirname(__file__),'./private-key.pem')
alipay_public_key_path = os.path.join(os.path.dirname(__file__),'./public-key.pem')

alipay = AliPay(
    appid="",  # 设置签约的appid
    app_notify_url="",  #线上地址 异步支付通知url
    app_private_key_path=app_private_key_path,  # 设置应用私钥
    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,            # 设置是否是沙箱环境，True是沙箱环境
    return_url="http://www.baidu.com"  # 同步支付通知url,在这个页面可以展示给用户看，只有付款成功后才会跳转
)

AlipayApi.py

# 定义资源
from flask_restful import Resource, reqparse
from App.alipay import alipay
from App.models import Orders

class Pay(Resource):
    def post(self):
        parser = reqparse.RequestParser()
        parser.add_argument(name='order_id', type=int)
        parse = parser.parse_args()
        order_id = parse.get('order_id')
        order = Orders.query.filter(Orders.id==order_id).first()

        # 获取订单号，根据订单生成 支付订单
        # 支付订单包括: 订单号、支付金额、订单名称
        # 传递参数执行支付类里的direct_pay方法，返回签名后的支付参数，
        url = alipay.direct_pay(
            subject="测试订单  ",  # 订单名称
            # 订单号生成，一般是当前时间(精确到秒)+用户ID+随机数
            out_trade_no=order.code,  # 订单号
            total_amount=order.sumprice,  # 支付金额
            return_url="http://www.baidu.com"  # 支付成功后，跳转url 【客户端显示】
        )
        data = {
            'subject':"测试订单",
            'out_trade_no':order.code,
            'total_amount':order.sumprice,
            'return_url':"http://www.baidu.com"
        }

        # 将前面后的支付参数，拼接到支付网关
        # 注意：下面支付网关是沙箱环境，最终进行签名后组合成支付宝的url请求
        re_url = "https://openapi.alipay.com/gateway.do?{data}".format(data=url)

        print(re_url)

        # 返回的是支付宝的支付地址
        return {'re_url': re_url,'data': data}

AsynApi.py

# -*- coding: utf-8 -*-

#异步回调
from flask_restful import Resource
from App.models import Orders, db

class Asyn(Resource):
    def post(self):
        orders = Orders.query.all()
        if orders:
            orders[-1].status = 1
            db.session.commit()
        else:
            pass
        return 'success'  #关键字 success