Django调用支付宝接口代码实例详解

支付宝支付

正式环境:用营业执照,申请商户号,appid

测试环境:沙箱环境:https://openhome.alipay.com/platform/appDaily.htm?tab=info

支付宝提供接口:给商户使用,收钱

• -Java,php,C#的demo,没有python的demo

• -git有人封装了

• -需要安装模块:pip3 install

• -应用私钥---自己保存,一定不能丢

• -应用公钥---给别人用

• -支付宝公钥---支付宝用的

• -生成公钥私钥:https://docs.open.alipay.com/291/105971

• -把应用公钥配置在支付宝上:应用公钥,配置完成以后,支付宝自动生成一个支付宝公钥

• -在程序中:配置应用私钥,支付宝公钥

• -如果支付成功,支付宝会回调,但是如果你的服务器挂掉了怎么办?

• -支付宝24小时以内不定时再给你发,你修改掉订单状态即可

• -支付成功,支付宝会有一个get回调,一个post回调:修改订单状态
  

支付宝接口

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.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)

视图函数

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 = "2016092000554611"
 # 支付宝收到用户的支付,会向商户发两个请求,一个get请求,一个post请求
 # POST请求，用于最后的检测
 notify_url = "http://42.56.89.12:80/page2/"
 # GET请求，用于页面的跳转展示
 return_url = "http://42.56.89.12:80/page2/"
 merchant_private_key_path = "keys/app_private_2048.txt"
 alipay_public_key_path = "keys/alipay_public_2048.txt"
 # 生成一个AliPay的对象
 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 == "GET":

return render(request, 'page1.html')
 else:
   money = float(request.POST.get('money'))
   # 生成一个对象
   alipay = ali()
   # 生成支付的url
   # 对象调用direct_pay
   query_params = alipay.direct_pay(
     subject="充气娃娃", # 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)
   print(pay_url)
   # 朝这个地址发get请求
   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')
   print(body_str)

post_data = parse_qs(body_str)
   print('支付宝给我的数据:::---------',post_data)
   post_dict = {}
   for k, v in post_data.items():
     post_dict[k] = v[0]
   print('转完之后的字典',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')

来源：https://www.cnblogs.com/ZKPython/p/11167710.html