Python版支付宝集成插件源代码-优快云博客

之前在做一项目的时候需要集成支付宝功能，网站是用python做的，参照支付宝的官方文档，写了以下代码（调试通过，能正常工作）:


# -*- coding: utf-8 -*-
#!/usr/bin/env python
# author: Robin Huang
# time  : 2009-03-30

import md5

class Alipay(object):
    def __init__(self):
        self.params = {}
        # 支付宝gateway 
        self.pay_gate_way = 'https://www.alipay.com/cooperate/gateway.do'
        # 安全码 ***处请填具体安全码
        self.security_code = '***' 

    #---------------------------------------------------------------------------
    # 根据订单生成支付宝接口URL
    # <<<<< Protocol Param >>>>>
    # @ input_charset: 编码方式
    # @ service: 接口名称, 有两种方式 =>
    #            1. trade_create_by_buyer (担保付款) 
    #            2. create_direct_pay_by_user (直接付款)
    # @ partner : 商户在支付宝的用户ID
    # @ show_url: 商品展示网址
    # @ return_url: 交易付款成功后，显示给客户的页面
    # @ sign_type: 签名方式
    #
    # <<<<< Business Param >>>>>
    # @ subject: 商品标题
    # @ body: 商品描述
    # @ out_trade_no: 交易号（确保在本系统中唯一）
    # @ price: 商品单价
    # @ discount: 折扣 -**表示抵扣**元
    # @ quantity: 购买数量
    # @ payment_type: 支付类型
    # @ logistics_type: 物流类型 => 1. POST (平邮) 2. EMS 3. EXPRESS (其他快递)
    # @ logistics_fee: 物流费
    # @ logistics_payment: 物流支付类型 => 
    #                      1. SELLER_PAY (卖家支付) 2. BUYER_PAY (买家支付)
    # @ seller_email: 卖家支付宝帐户email
    # 
    # @return 
    #---------------------------------------------------------------------------
    def create_order_alipay_url(self, 
                                input_charset, 
                                service, 
                                partner, 
                                show_url, 
                                return_url, 
                                sign_type,
                                subject, 
                                body, 
                                out_trade_no, 
                                price, 
                                discount, 
                                quantity, 
                                payment_type, 
                                logistics_type, 
                                logistics_fee, 
                                logistics_payment, 
                                seller_email
                                ): 
        self.params['_input_charset'] = input_charset
        self.params['service'] = service
        self.params['partner'] = partner
        self.params['show_url'] = show_url
        self.params['return_url'] = return_url
        self.params['subject'] = subject
        self.params['body'] = body
        self.params['out_trade_no'] = out_trade_no
        self.params['price'] = price
        self.params['discount'] = discount
        self.params['quantity'] = quantity
        self.params['payment_type'] = payment_type
        self.params['logistics_type'] = logistics_type
        self.params['logistics_fee'] = logistics_fee
        self.params['logistics_payment'] = logistics_payment
        self.params['seller_email'] = seller_email
        # 返回结果
        return self._create_url(self.params, sign_type)

    def _create_url(self, params, sign_type='MD5'): 
        param_keys = params.keys()
        # 支付宝参数要求按照字母顺序排序
        param_keys.sort()
        # 初始化待签名的数据
        unsigned_data = ''
        # 生成待签名数据
        for key in param_keys:
            unsigned_data += key + '=' + params[key]
            if key != param_keys[-1]:
                unsigned_data += '&'
        # 添加签名密钥
        unsigned_data += self.security_code
        # 计算sign值
        if sign_type == 'MD5':
            M = md5.new()
            M.update(unsigned_data)
            sign = M.hexdigest()
        else:
            sign = ''
        request_data = self.pay_gate_way + '?'
        for key in param_keys:
            request_data += key + '=' + params[key].decode('utf8').encode(params['_input_charset'])
            request_data += '&'
        request_data += 'sign=' + sign + '&sign_type=' + sign_type
        # 返回结果
        return request_data