#pay文件代码

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 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.AlipayAPI.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("\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)

import time

from pay import AliPay

class AlipayApi(object):

    def __init__(self, app_id, notify_url, return_url, merchant_private_key_path, alipay_public_key_path,debug):

        """

        :param app_id:

        :param notify_url:支付宝post回调地址，用来修改订单信息

        :param return_url:支付宝get回调地址，用来给用户展示

        :param merchant_private_key_path:商户的私钥

        :param alipay_public_key_path:支付宝的公钥

        """

        self.app_id = app_id

        self.notify_url = notify_url

        self.return_url = return_url

        self.merchant_private_key_path = merchant_private_key_path

        self.alipay_public_key_path = alipay_public_key_path

        self.debug=debug

        self.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=debug,  # 默认False,

        )

    def getAlipayPage(self,subject,total_amount,out_trade_no,):

        """

        :param subject: 商品简单描述

        :param total_amount: 交易总金额(单位: 元 保留俩位小数)

        :param out_trade_no: 商户订单号

        :return: 支付宝支付页面

        """

        query_params = self.alipay.direct_pay(

            subject=subject,

            out_trade_no=out_trade_no,

            total_amount=total_amount,

        )

        if self.debug:

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

        else:

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

        return pay_url

    def alipayCallbackPost(self,body_str):

        """

        :param body_str: post回调的数据

        :return:

        """

        from urllib.parse import parse_qs

        post_data = parse_qs(body_str)

        post_dict = {}

        for k, v in post_data.items():

            post_dict[k] = v[0]

        # 做二次验证

        sign = post_dict.pop('sign', None)

        # 通过调用alipay的verify方法去认证

        status = self.alipay.verify(post_dict, sign)

        if status:

            # 修改自己订单状态

            return True

        else:

            return False

    def alipayCallbackGet(self,params):

        """

        :param params: get回调的数据

        :return:

        """

        dic_params = {k: v for k, v in params.items()}

        sign = dic_params.pop('sign', None)

        status = self.alipay.verify(dic_params, sign)

        if status:

            return True

        else:

            return False

if __name__ == '__main__':

    app_id = "填写自己的"

    notify_url = "填写自己的"

    return_url = "填写自己的"

    merchant_private_key_path = "app_private_2048.txt"

    alipay_public_key_path = "alipay_public_2048.txt"

    ali=AlipayApi(app_id=app_id,

                  notify_url=notify_url,

                  return_url=return_url,

                  merchant_private_key_path=merchant_private_key_path,

                  alipay_public_key_path=alipay_public_key_path,

                  debug=True)

    subject="充气娃娃"

    out_trade_no="OFG"+str(time.time())

    total_amount=1000

    url=ali.getAlipayPage(subject=subject,out_trade_no=out_trade_no,total_amount=total_amount)

    print(url)