python --支付宝

python --支付宝

https://github.com/fzlee/alipay/blob/master/README.zh-hans.md#python-alipay-sdk

支付并签约

第三方

import os

from alipay import BaseAliPay
from alipay.utils import AliPayConfig


class MyBaseAlipay(BaseAliPay):
    '''签约并支付,重写APP支付,初始化支付参数'''

    def api_alipay_trade_app_pay(self, subject, out_trade_no, total_amount, notify_url=None, **kwargs):
        biz_content = {
            "subject": subject,
            "out_trade_no": out_trade_no,
            "total_amount": total_amount,
            "product_code": "CYCLE_PAY_AUTH",
            "agreement_sign_params": {
                "personal_product_code": "CYCLE_PAY_AUTH_P",
                "sign_scene": "INDUSTRY|DIGITAL_MEDIA",
                "external_agreement_no": "test20190701",
                "access_params": {"channel": "ALIPAYAPP"},
                "period_rule_params": {
                    "period_type": "DAY",
                    "period": 30, "execute_time": "2021-09-29",
                    "single_amount": "1000.00",
                }
            },
        }
        biz_content.update(kwargs)
        data = self.build_body("alipay.trade.app.pay", biz_content, notify_url=notify_url)
        return self.sign_data(data)


def ali_pay() -> str:
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    app_private_key_string = open(os.path.join(BASE_DIR, 'yingyong_siyao.txt')).read()
    alipay_public_key_string = open(os.path.join(BASE_DIR, 'zhifubao_gongyao.txt')).read()
    alipay = MyBaseAlipay(
        appid="2021000116677890",
        app_notify_url=None,
        app_private_key_string=app_private_key_string,
        alipay_public_key_string=alipay_public_key_string,
        sign_type="RSA2",
        debug=False,
        verbose=True,
        config=AliPayConfig(timeout=15)
    )

    order_string = alipay.api_alipay_trade_app_pay(
        out_trade_no="20161112",
        total_amount=0.01,
        subject='蛐蛐竞技',
        notify_url="https://example.com/notify"  # 可选，不填则使用默认 notify url
    )
    return str(order_string)

自实现

from rest_framework.decorators import api_view
from rest_framework.response import Response

from datetime import datetime
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from base64 import b64encode, b64decode
from urllib.parse import quote_plus
from urllib.parse import urlparse, parse_qs
from urllib.request import urlopen
from base64 import decodebytes, encodebytes

import json


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, *args, **kwargs):
        import time
        now_date = time.strftime('%Y-%m-%d')
        biz_content = {
            "total_amount": "0.01",
            "subject": "蛐蛐竞技",
            "out_trade_no": "123456",
            "agreement_sign_params": {
                "personal_product_code": "CYCLE_PAY_AUTH_P",
                "sign_scene": "INDUSTRY|DIGITAL_MEDIA",
                "access_params": {"channel": "ALIPAYAPP"},
                "period_rule_params":
                    {"period_type": "DAY", "period": "30", "execute_time": "2021-09-28", "single_amount": 10.99}
                 }}

        print(biz_content)

        biz_content.update(kwargs)
        # data = self.build_body("alipay.trade.page.pay", biz_content, self.return_url)
        data = self.build_body("alipay.trade.app.pay", biz_content, self.return_url)
        res = self.sign_data(data)
        print(f'预请求参数地址为:{res}')
        return res

    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
        print(f'初始化参数:{data}', '\n')
        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)


@api_view(['GET', ])
def c(request):
    alipay = AliPay(
        appid="2021000116677890",  # 设置签约的appid
        app_notify_url="http://projectsedus.com/",  # 异步支付通知url
        app_private_key_path=u"yingyong_siyao.txt",  # 设置应用私钥
        alipay_public_key_path="zhifubao_gongyao.txt",  # 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://47.92.87.172:8000/"  # 同步支付通知url
    )

    # 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(
        return_url="http://47.92.87.172:8000/"  # 支付成功后，跳转url
    )
    re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
    return Response({'url':re_url})

退款

from alipay import BaseAliPay, AliPay
from alipay.utils import AliPayConfig

app_private_key_string = open(r"D:/yi/ddd/yingyong_siyao.txt").read()
alipay_public_key_string = open(r"D:/yi/ddd/zhifubao_gongyao.txt").read()

alipay = AliPay(
    appid="2021002175672102",
    app_notify_url=None,  # 默认回调 url
    app_private_key_string=app_private_key_string,
    # 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,
    alipay_public_key_string=alipay_public_key_string,
    sign_type="RSA2",  # RSA 或者 RSA2
    debug=False,  # 默认 False
    verbose=True,  # 输出调试数据
    config=AliPayConfig(timeout=15)  # 可选，请求超时时间
)

result = alipay.api_alipay_trade_refund(out_trade_no="OW1632640656", refund_amount="30")
print(result)

pc端自实现

为什么使用三方支付？

再没有三方支付平台之前，用户发起支付请求的时候，用户要去和银行签约(转账)，特别的不方便，为了解决这些问题，就有了三方支付，三方平台去完成签约，给用户节省时间。

支付宝支付的流程

商户拿到支付宝的公钥、自己的私钥（私钥加密、公钥解密），用私钥请求支付宝，支付宝解密、验签、进行支付处理，支付宝将处理的返回值传给商户，当支付成功后，返还给商户订单号、金额、时间戳等消息，支付失败后同样给商户反馈结果。

配置流程

获取APPID

支付宝开放平台:https://open.alipay.com/

登录支付宝开放平台–>点击控制台

点击沙箱(复制APPID)

在线生成密钥

点击文档，找到开发助手，点击在线加密。

获取私钥

获取公钥

点击应用公钥

生成公钥

现在已经拿到了需要的公钥。

Python项目中集成支付宝

构建支付类

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:
    """
    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",
        }

        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)
        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"))
        quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsigned_items)

        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)

        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):
        key = self.app_private_key
        signer = PKCS1_v1_5.new(key)
        signature = signer.sign(SHA256.new(unsigned_string))
        sign = encodebytes(signature).decode("utf8").replace("\n", "")
        return sign

    def _verify(self, raw_content, signature):
        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:
            data.pop("sign_type")
        unsigned_items = self.ordered_data(data)
        message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
        return self._verify(message, signature)

实例化类

def init_alipay():
    # 初始化Alipay
    alipay = AliPay(
        appid="appid",
        app_notify_url="回调地址",
        return_url="回调地址",
        app_private_key_path="私钥相对路径",
        alipay_public_key_path="公钥相对路径",
        debug=True  # 支付环境
    )
    return alipay

API

async def get(self):
  
    alipay = init_alipay()
    # 传一个标题  订单号  订单价格
    params = alipay.direct_pay("三方广告平台", order_no, money)
    url = f"https://openapi.alipaydev.com/gateway.do?{params}"
    return self.write(ret_json(url))

# 构建一个回调地址,用于支付成功后回调,在回调地址中可以获取订单号(out_trade_no)、金额(total_amount)、时间戳(timestamp),然后进行处理业务逻辑。