支付宝商户生成订单收款二维码

发表于 更新于
支付宝开放平台+支付宝商户后台。
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import hashlib
import hmac
import json
import time
import requests
from urllib.parse import urlencode, unquote
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from Crypto.PublicKey import RSA
import base64
import qrcode
from PIL import Image
import os

class AlipayPreorderClient:
    def __init__(self, app_id, merchant_private_key, alipay_public_key):
        """初始化支付宝预收单客户端"""
        self.app_id = app_id
        self.merchant_private_key = merchant_private_key
        self.alipay_public_key = alipay_public_key
        self.gateway = "https://openapi.alipay.com/gateway.do"
        self.format = "JSON"
        self.charset = "utf-8"
        self.sign_type = "RSA2"

    def generate_sign(self, params, private_key):
        """生成RSA2签名"""
        params_to_sign = {k: v for k, v in params.items() if k != "sign" and v is not None}
        sorted_params = sorted(params_to_sign.items(), key=lambda x: x[0])
        string_to_sign = "&".join([f"{k}={v}" for k, v in sorted_params])
        
        private_key = private_key.replace("-----BEGIN PRIVATE KEY-----", "").replace("-----END PRIVATE KEY-----", "").replace("\n", "")
        private_key_bytes = base64.b64decode(private_key)
        key = RSA.import_key(private_key_bytes)
        
        h = SHA256.new(string_to_sign.encode('utf-8'))
        signer = PKCS1_v1_5.new(key)
        signature = signer.sign(h)
        return base64.b64encode(signature).decode('utf-8')

    def create_preorder(self, out_trade_no, total_amount, subject):
        """创建预收单并获取二维码链接"""
        common_params = {
            "app_id": self.app_id,
            "method": "alipay.trade.precreate",
            "format": self.format,
            "charset": self.charset,
            "sign_type": self.sign_type,
            "timestamp": time.strftime("%Y-%m-%d %H:%M:%S", time.localtime()),
            "version": "1.0",
        }
        
        biz_content = {
            "out_trade_no": out_trade_no,
            "total_amount": total_amount,
            "subject": subject,
            "timeout_express": "30m",
            "product_code": "QR_CODE_OFFLINE"
        }
        
        common_params["biz_content"] = json.dumps(biz_content, ensure_ascii=False)
        common_params["sign"] = self.generate_sign(common_params, self.merchant_private_key)
        
        url = f"{self.gateway}?charset={self.charset}"
        response = requests.post(url, data=common_params)
        result = response.json()
        
        if 'alipay_trade_precreate_response' in result and result['alipay_trade_precreate_response'].get('code') == '10000':
            qr_code = result['alipay_trade_precreate_response']['qr_code']
            return qr_code
        else:
            print(f"预收单创建失败: {result}")
            return None

def generate_qr_code(qr_url, save_path="alipay_payment_code.png"):
    """生成二维码图片"""
    # 解码URL（处理可能的编码）
    decoded_url = unquote(qr_url)
    
    # 生成二维码
    qr = qrcode.QRCode(
        version=1,
        error_correction=qrcode.constants.ERROR_CORRECT_L,
        box_size=10,
        border=4,
    )
    qr.add_data(decoded_url)
    qr.make(fit=True)
    img = qr.make_image(fill_color="black", back_color="white")
    
    # 保存二维码图片
    img.save(save_path)
    print(f"二维码已保存至: {os.path.abspath(save_path)}")
    return save_path

def display_qr_code(image_path):
    """显示二维码图片"""
    try:
        img = Image.open(image_path)
        img.show()
    except Exception as e:
        print(f"显示二维码失败: {e}")
        print(f"请手动打开: {image_path}")

# 使用示例
if __name__ == "__main__":
    # 配置参数（请替换为实际值）
    APP_ID = "2021005164660117"
    MERCHANT_PRIVATE_KEY = """-----BEGIN PRIVATE KEY-----
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
-----END PRIVATE KEY-----"""
    ALIPAY_PUBLIC_KEY = """-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAhDhkT2FHjZBJhiiOPI8sUfp5CLc98yFY46g8CzM/BY2rXDkznjm00Ij+rCP4X9HSibq9T0PJ9l9Fs4LX0hOpN9D/v4mdvqzbLgGuwVNAD+KR6cxAv0xn3mil9FfTyne9FUAyWj+pSxZXbsh3vKV3dXvDi0rlzbqtZG+jEetcm5+FUpeezHpCdXaPZbZ9BmsWu3jf/JxorGOkvgpy/RGp1MIY3hW+Acdkb4CqE64IQH2uaclj4ubd+DhEjTCJX02SX7WS59TXQipaDRznhc5LlIPsFwPmmFwafrDC5abkh0D5nawm6yVn6hoZSg2gpWeS1DqwVQAQWkq+XdwIJJlgMQIDAQA
-----END PUBLIC KEY-----"""
    
    # 初始化客户端
    client = AlipayPreorderClient(APP_ID, MERCHANT_PRIVATE_KEY, ALIPAY_PUBLIC_KEY)
    
    # 创建预收单
    out_trade_no = f"PREORDER_{int(time.time())}"
    qr_code_url = client.create_preorder(
        out_trade_no=out_trade_no,
        total_amount="1.00",  # 建议使用非0.01元避免风控
        subject="测试商品"
    )
    
    if qr_code_url:
        # 生成并显示二维码
        qr_image = generate_qr_code(qr_code_url)
        display_qr_code(qr_image)