python支付宝页面扫码支付

一、介绍

基于网上一个支付宝pay.py封装了支付宝API的文件进行的，以下代码只支持网页扫码支付，手机端会提示调用支付宝支付

#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)

二、自己封装的调用代码

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)

key文件的格式

效果图