支付宝支付
支付宝支付
接入支付宝支付流程概述：
测试环境为沙箱环境，沙箱环境地址：https://openhome.alipay.com/platform/appDaily.htm?tab=info
1、接入支付宝支付环境所需配置信息：
1.1、商户号：向支付宝申请得到；
1.2、appid，开发用的，商户的唯一id；
1.3三种密钥（非对称密钥）。
a、应用私钥（商户私钥） b、应用公钥 c、支付宝公钥:在支付宝开发平台配置上应用公钥,自动生成的
注：a/b中的密钥通过https://alipay.open.taobao.com/docs/doc.htm?treeId=291&articleId=105971&docType=1生成
在项目中需要配置的以上a，c两个密钥
2、项目启动后的支付流程：
2.1、生成一个AliPay对象（别人写好的模块），传入appid、get回调地址、post回调地址、商户私钥、支付宝公钥；
2.2、调用该对象的direct_pay()方法，传入商品描述、商品订单号、商品价格，返回一堆字符串,拼接到支付宝网关的后面；
2.3、向支付宝网关发送get请求，看到支付页面，用户付款；
2.4、付款成功后，支付宝会有一个get回调，一个post回调(需要对回调内容进行验签，alipay.verify)
示例：本例采用django框架搭建，此处只给出三方模块 views.py url.py 和HTML页面
url.py
from django.contrib import admin from django.conf.urls import url from app01 import views urlpatterns = [ url('admin/', admin.site.urls), url(r'^page1/', views.page1), url(r'^page2/', views.page2), ]
views.py
from django.shortcuts import render, redirect, HttpResponse from myutils.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 = "2016092600599696" # 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://192.168.13.145:8007/page2/" # GET请求，用于页面的跳转展示 return_url = "http://192.168.13.145:8007/page2/" # 用户私钥 保存在根目录下的key文件夹中 merchant_private_key_path = "keys/app_private_2048.txt" # 支付宝公钥 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 # 该方法生成一个加密串 query_params = alipay.direct_pay( subject="商品名称", # 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 # from django.http import JsonResponse # return JsonResponse({'status':100,'url':pay_url}) return redirect(pay_url) def page2(request): # 支付宝如果收到用户的支付,支付宝会给我的地址发一个post请求,一个get请求 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) # 做二次验证 sign = post_dict.pop('sign', None) # 通过调用alipay的verify方法去认证 status = alipay.verify(post_dict, sign) print('POST验证', status) if status: # 修改自己订单状态 pass 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')
html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="dist/css/bootstrap.css"> </head> <body> <form method="POST"> {% csrf_token %} <input type="text" name="money"> <input type="submit" value="去支付" /> </form> <script></script> </body> </html>
myutils》pay.py (三方模块)
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)
