python支付宝支付流程

注意：
保存

　　支付宝公钥（通过商户公钥生成）
　　商户私钥

settings.py中ALLOWED_HOSTS=["*"]

点击支付，发送POST请求，提供商品信息及订单号（唯一标识），根据支付宝SDK的配置，首先发送发送POST请求，进行支付验证，支付成功后，根据订单号，修改订单状态，失败则不修改，然后展示支付结果，最后跳转回设定好的商户URL页面

根据当前用户的配置（支付时发送POST请求的地址（用于验证支付成功与否），支付完成后跳转的商户地址，支付宝公钥，商户私钥），生成URL，并跳转到扫码支付页面。
上面两个地址相当于回调函数（）

1.项目展示：

2.扫码支付

3.支付完成

4.跳转成功

一、注册账号

​​https://openhome.alipay.com/platform/appDaily.htm?tab=info​​

二、设置应用公钥

私钥需要复制到程序里的：

程序里面阿里的公钥在这里获取：

、

 

这里放的是阿里的公钥。

代码实现：

  代码结构：

      1. 首先是：更改程序里面的阿里公钥和用户私钥以及app_id

      2.pay.py 这是从git上找到的支付宝支付接口(PC端支付接口) 

    3、  

1 from datetime import datetime
2 from Crypto.PublicKey import RSA
3 from Crypto.Signature import PKCS1_v1_5
4 from Crypto.Hash import SHA256
5 from urllib.parse import quote_plus
6 from urllib.parse import urlparse, parse_qs
7 from base64 import decodebytes, encodebytes
8 import json
9
10 class AliPay(object):
11 """
12 支付宝支付接口(PC端支付接口)
13 """
14
15 def __init__(self, appid, app_notify_url, app_private_key_path,
16 alipay_public_key_path, return_url, debug=False):
17 self.appid = appid
18 self.app_notify_url = app_notify_url
19 self.app_private_key_path = app_private_key_path
20 self.app_private_key = None
21 self.return_url = return_url
22 with open(self.app_private_key_path) as fp:
23 self.app_private_key = RSA.importKey(fp.read())
24 self.alipay_public_key_path = alipay_public_key_path
25 with open(self.alipay_public_key_path) as fp:
26 self.alipay_public_key = RSA.importKey(fp.read())
27
28 if debug is True:
29 self.__gateway = "https://openapi.alipaydev.com/gateway.do"
30 else:
31 self.__gateway = "https://openapi.alipay.com/gateway.do"
32
33 def direct_pay(self, subject, out_trade_no, total_amount, return_url=None, **kwargs):
34 biz_content = {
35 "subject": subject,
36 "out_trade_no": out_trade_no,
37 "total_amount": total_amount,
38 "product_code": "FAST_INSTANT_TRADE_PAY",
39 # "qr_pay_mode":4
40 }
41
42 biz_content.update(kwargs)
43 data = self.build_body("alipay.trade.page.pay", biz_content, self.return_url)
44 return self.sign_data(data)
45
46 def build_body(self, method, biz_content, return_url=None):
47 data = {
48 "app_id": self.appid,
49 "method": method,
50 "charset": "utf-8",
51 "sign_type": "RSA2",
52 "timestamp": datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
53 "version": "1.0",
54 "biz_content": biz_content
55 }
56
57 if return_url is not None:
58 data["notify_url"] = self.app_notify_url
59 data["return_url"] = self.return_url
60
61 return data
62
63 def sign_data(self, data):
64 data.pop("sign", None)
65 # 排序后的字符串
66 unsigned_items = self.ordered_data(data)
67 unsigned_string = "&".join("{0}={1}".format(k, v) for k, v in unsigned_items)
68 sign = self.sign(unsigned_string.encode("utf-8"))
69 # ordered_items = self.ordered_data(data)
70 quoted_string = "&".join("{0}={1}".format(k, quote_plus(v)) for k, v in unsigned_items)
71
72 # 获得最终的订单信息字符串
73 signed_string = quoted_string + "&sign=" + quote_plus(sign)
74 return signed_string
75
76 def ordered_data(self, data):
77 complex_keys = []
78 for key, value in data.items():
79 if isinstance(value, dict):
80 complex_keys.append(key)
81
82 # 将字典类型的数据dump出来
83 for key in complex_keys:
84 data[key] = json.dumps(data[key], separators=(',', ':'))
85
86 return sorted([(k, v) for k, v in data.items()])
87
88 def sign(self, unsigned_string):
89 # 开始计算签名
90 key = self.app_private_key
91 signer = PKCS1_v1_5.new(key)
92 signature = signer.sign(SHA256.new(unsigned_string))
93 # base64 编码，转换为unicode表示并移除回车
94 sign = encodebytes(signature).decode("utf8").replace("\n", "")
95 return sign
96
97 def _verify(self, raw_content, signature):
98 # 开始计算签名
99 key = self.alipay_public_key
100 signer = PKCS1_v1_5.new(key)
101 digest = SHA256.new()
102 digest.update(raw_content.encode("utf8"))
103 if signer.verify(digest, decodebytes(signature.encode("utf8"))):
104 return True
105 return False
106
107 def verify(self, data, signature):
108 if "sign_type" in data:
109 sign_type = data.pop("sign_type")
110 # 排序后的字符串
111 unsigned_items = self.ordered_data(data)
112 message = "&".join(u"{}={}".format(k, v) for k, v in unsigned_items)
113 return self._verify(message, signature)

支付函数

    4.路由设置：

from django.conf.urls import url
from django.contrib import admin
from app01 import views
urlpatterns = [
url(r'^admin/', admin.site.urls),
url(r'^page1/', views.page1),
url(r'^index/', views.index),
url(r'^page2/', views.page2),
]

   5.视图：

from django.shortcuts import render, redirect, HttpResponse
from utils.pay import AliPay
import json
import time


def ali():
# 沙箱环境地址：https://openhome.alipay.com/platform/appDaily.htm?tab=info
app_id = "2016091100483151"
# POST请求，用于最后的检测
notify_url = "http://127.0.0.1:8804/page2/"
# notify_url = "http://www.wupeiqi.com:8804/page2/"

# GET请求，用于页面的跳转展示
return_url = "http://127.0.0.1:8804/page2/"
# return_url = "http://www.wupeiqi.com:8804/page2/"

merchant_private_key_path = "keys/app_private_2048.txt"
alipay_public_key_path = "keys/alipay_public_2048.txt"

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 index(request):
return render(request,'index.html')

def page1(request):
if request.method == "GET":
return render(request, 'index.html')
else:
money = float(request.POST.get('money'))
alipay = ali()
# 生成支付的url
query_params = alipay.direct_pay(
subject="充气式韩红", # 商品简单描述
out_trade_no="x2" + str(time.time()), # 商户订单号
total_amount=money, # 交易金额(单位: 元 保留俩位小数)
)

pay_url = "https://openapi.alipaydev.com/gateway.do?{}".format(query_params)

return redirect(pay_url)


def page2(request):
alipay = ali()
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)

post_dict = {}
for k, v in post_data.items():
post_dict[k] = v[0]
print(post_dict)

sign = post_dict.pop('sign', None)
status = alipay.verify(post_dict, sign)
print('POST验证', status)
return HttpResponse('POST返回')

else:
params = request.GET.dict()
sign = params.pop('sign', None)
status = alipay.verify(params, sign)
print('GET验证', status)
return HttpResponse('支付成功')

     6.模板

Title

{% csrf_token %}

注意：安装Crypto

   把安装包放到C:\Users\frank\AppData\Local\Programs\Python\Python36\Lib\site-packages   然后解压缩就行了。