Python只需3分钟即可搭建支付宝三方支付

from datetime import datetimefrom Crypto.PublicKey import RSAfrom Crypto.Signature import PKCS1_v1_5from Crypto.Hash import SHA256from urllib.parse import quote_plusfrom base64 import decodebytes, encodebytesimport 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)

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

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。