转载--三方支付流程(支付宝)
本文转载自 v3u.cn 我大牛悦哥
内容详细 留作备用
支付宝支付流程
首先进入支付宝平台，点击开发中心-》研发服务
获得沙盒的appid以及商户公钥和支付宝公钥
然后利用秘钥生成软件生成私钥和公钥
建立keys文件夹， 将私钥和公钥文件放入keys
加入头部和尾部代码
最后用支付宝公钥替换公钥文件
安装第三方库
pip3 install -i https://pypi.douban.com/simple pycryptodome
根据支付宝官网文档撰写公共类
文档地址：https://docs.open.alipay.com/api
pay.py
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)
建立请求视图和回调视图以及初始化支付宝对象
#初始化阿里支付对象
def get_ali_object():
# 沙箱环境地址：https://openhome.alipay.com/platform/appDaily.htm?tab=info
app_id = "2016092600603658" # APPID （沙箱应用）
# 支付完成后，支付偷偷向这里地址发送一个post请求，识别公网IP,如果是 192.168.20.13局域网IP ,支付宝找不到，def page2() 接收不到这个请求
notify_url = "http://localhost:8000/md_admin/alipayreturn"
# 支付完成后，跳转的地址。
return_url = "http://localhost:8000/md_admin/alipayreturn"
merchant_private_key_path = "c:/Users/liuyue/www/md/keys/app_private_2048.txt" # 应用私钥
alipay_public_key_path = "c:/Users/liuyue/www/md/keys/alipay_public_2048.txt" # 支付宝公钥
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=True, # 默认False,
)
return alipay
def page1(request):
if request.method == "POST":
# 根据当前用户的配置，生成URL，并跳转。
money = float(request.POST.get('money'))
alipay = get_ali_object()
# 生成支付的url
query_params = alipay.direct_pay(
subject="test", # 商品简单描述
out_trade_no="myorder" + str(time.time()), # 用户购买的商品订单号（每次不一样） 20180301073422891
total_amount=money, # 交易金额(单位: 元 保留俩位小数)
)
pay_url = "https://openapi.alipaydev.com/gateway.do?{0}".format(query_params) # 支付宝网关地址（沙箱应用）
return redirect(pay_url)
else:
return render(request,'md_admin/page1.html')
def alipay_return(request):
alipay = get_ali_object()
params = request.GET.dict()
sign = params.pop('sign', None)
status = alipay.verify(params, sign)
print('==================开始==================')
print('GET验证', status)
print('==================结束==================')
return HttpResponse('支付成功')
