支付宝支付功能
支付宝提供的SDK没有python版本,我们需要自己实现
首先要安装加密工具,
- linxu环境下:
- pip install pycrypto
- windows:
- 下载pycryptodome.whl,本地安装pycryptodome.whl,切换到pycryptodome.whl目录下
- pip install pycryptodome.whl
支付流程
沙箱环境的操作
登录支付宝开放平台,选择开发接入,支付应用
然后进入了创建应用的页面,选择开发者中心的沙箱环境
沙箱应用的设置
设置完应用公钥后,会生成支付宝公钥
python代码部分
python项目中,需要添加支付宝公钥与应用私钥的文件,文件格式如下 PS: 支付宝公钥+应用私钥 支付宝公钥： -----BEGIN PUBLIC KEY----- 公钥 -----END PUBLIC KEY----- 应用私钥： -----BEGIN RSA PRIVATE KEY----- 私钥 -----END RSA PRIVATE KEY-----
python的SDK(github上找的)
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 urllib.parse import urlparse, parse_qs
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.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",
# "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)
简单的逻辑代码
from django.shortcuts import render, redirect, HttpResponse
import json
import time
from utils.pay import AliPay
from app01 import models
from django.conf import settings
def alipay_obj():
'''该函数返回AliPay对象'''
alipay = AliPay(
appid=settings.ALIPAY_APPID, # 应用ID
app_notify_url="http://47.93.4.198:8004/page2/", # POST请求地址,需要是公网地址
return_url="http://127.0.0.1:8804/page3/", # 要跳转到的地址
app_private_key_path="keys/app_private_2048.txt", # 应用私钥的路径
alipay_public_key_path="keys/alipay_public_2048.txt", # 支付宝的公钥的路径，验证支付宝回传消息使用，不是你自己的公钥
debug=True, # 默认False,
)
return alipay
def page1(request):
if request.method == "GET":
return render(request, 'page1.html')
else:
# 根据：appid、应用私钥、支付宝公钥、金额、订单名称、订单号 生一个URL，再进行跳转。
# 1. 要支付的金额
money = float(request.POST.get('money'))
alipay = alipay_obj()
# 随机生成一个字符串作为订单编号,将编号传递给支付宝,支付宝响应的内容也要携带它,根据他来修改订单状态
order_num = "xxxxxxxxxxxx" + str(time.time())
# 生成支付的url
query_params = alipay.direct_pay(
subject="充气式文杰", # 商品简单描述
out_trade_no=order_num, # 商户订单号：ijldsddfsdfsdf
total_amount=money, # 交易金额(单位: 元 保留俩位小数)
)
# 3. query_params，根据appid、应用私钥、支付宝公钥、金额、订单名称、订单号生成的参数。
# 4. 拼接URL： https://openapi.alipaydev.com/gateway.do + query_params
pay_url = "https://openapi.alipaydev.com/gateway.do?{}".format(query_params)
# ####### 在数据库中生成订单 ###########
models.Order.objects.create(num=order_num,price=money)
return redirect(pay_url)
def page2(request):
"""
支付宝支付成功后，支付宝主动向我的网站发送：post请求，用于通知我支付成功，我来修改订单状态
PS: 检验数据是否合法
:param request:
:return:
"""
alipay = alipay_obj()
if request.method == "POST":
# 检测是否支付成功
# 去请求体中获取所有返回的数据：状态/订单号
from urllib.parse import parse_qs
body_str = request.body.decode('utf-8')
post_data = parse_qs(body_str)
# 大概post_data中的数据有点像querydict吧,所以下面才取第0个元素
post_dict = {}
for k, v in post_data.items():
post_dict[k] = v[0]
sign = post_dict.pop('sign', None)
# 使用sign+支付宝发来的数据，进行校验,如果秘钥有错误,这里验证不会通过
status = alipay.verify(post_dict, sign)
if status:
order_num = post_dict.get('out_trade_no')
models.Order.objects.filter(num=order_num).update(status=2)
return HttpResponse('POST返回')
# http://127.0.0.1:8804/page3/
def page3(request):
alipay = alipay_obj()
params = request.GET.dict()
sign = params.pop('sign', None)
# 校验
status = alipay.verify(params, sign)
if status:
return HttpResponse('支付成功')
else:
return HttpResponse('支付失败')
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