Django框架中使用支付宝在线支付API
Posted ZivLi
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一.蚂蚁金服开发平台申请测试账号
a. 登陆蚂蚁金服开放平台https://open.alipay.com/platform/manageHome.htm,在“开发中心”—“研发服务”下拉处选择沙箱作为测试环境。
b. 填写相关信息,成功申请沙箱账号后进入沙箱环境页面
c.下载沙箱钱包(目前仅支持安卓手机)
d. 使用沙箱账号处的买家账号登陆下载好的沙箱钱包
二.制作公钥和密钥
a.制作应用私钥和公钥
在沙箱应用处点击查看应用公钥
在显示的应用公钥处点击修改
在点击查看密钥生成方法
根据教程生成密钥和公钥
得到一个RSA密钥文件夹,里面有两个文件
b. 制作支付宝公钥
将应用公钥复制上传,点击保存会自动生成支付宝公钥
查看支付宝公钥
三.Django程序开发
a.创建一个django项目
b.配置支付宝公钥和应用私钥
在私钥和公钥头围加上标记便于python识别
c.代码编写
首先安装依赖 pip3 install pycryptodome
SDK官方加密代码,可以在github上找到
# _*_ coding=utf-8 _*_ 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)
from django.contrib import admin from django.urls import path from api import views urlpatterns = [ path(\'admin/\', admin.site.urls), path(\'index/\', views.index), path(\'result/\', views.pay_result), path(\'update_order/\', views.update_order), ]
import time from urllib.parse import parse_qs from django.conf import settings from django.shortcuts import render, redirect, HttpResponse from django.views.decorators.csrf import csrf_exempt from utils.alipay import AliPay def aliPay(): obj = AliPay( appid="2016092400581835", # 支付宝沙箱里面的APPID app_notify_url="http://127.0.0.1:8800/update_order/", # 如果支付成功,支付宝会向这个地址发送POST请求(校验是否支付已经完成),此地址要能够在公网进行访问 return_url="http://127.0.0.1:8800/result/", # 如果支付成功,重定向回到你的网站的地址。 alipay_public_key_path="keys/alipay_public_2048.txt", # 支付宝公钥 app_private_key_path="keys/app_private_2048.txt", # 应用私钥 debug=True, # 默认False,True表示使用沙箱环境测试 ) # 优化:在settings里面的设置后使用 # obj = AliPay( # appid=settings.APPID, # app_notify_url=settings.NOTIFY_URL, # return_url=settings.RETURN_URL, # alipay_public_key_path=settings.PUB_KEY_PATH, # app_private_key_path=settings.PRI_KEY_PATH, # debug=True, # ) return obj @csrf_exempt def index(request): if request.method == "GET": return render(request, \'index.html\') # 实例化SDK里面的类AliPay alipay = aliPay() # 对购买的数据进行加密 money = float(request.POST.get(\'price\')) # 保留俩位小数 out_trade_no = "x2" + str(time.time()) # 商户订单号 # 1. 在数据库创建一条数据:状态(待支付) query_params = alipay.direct_pay( subject="充气式Saber", # 商品简单描述 out_trade_no=out_trade_no, # 商户订单号 total_amount=money, # 交易金额(单位: 元 保留俩位小数) ) # 拼接url,转到支付宝支付页面 pay_url = "https://openapi.alipaydev.com/gateway.do?{}".format(query_params) return redirect(pay_url) @csrf_exempt def update_order(request): """ 支付成功后,支付宝向该地址发送的POST请求(用于修改订单状态) :param request: :return: """ if request.method == \'POST\': 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] alipay = aliPay() sign = post_dict.pop(\'sign\', None) status = alipay.verify(post_dict, sign) if status: # 1.修改订单状态 out_trade_no = post_dict.get(\'out_trade_no\') print(out_trade_no) # 2. 根据订单号将数据库中的数据进行更新 return HttpResponse(\'支付成功\') else: return HttpResponse(\'支付失败\') return HttpResponse(\'\') @csrf_exempt def pay_result(request): """ 支付完成后,跳转回的地址 :param request: :return: """ params = request.GET.dict() sign = params.pop(\'sign\', None) alipay = aliPay() status = alipay.verify(params, sign) if status: return HttpResponse(\'支付成功\') return HttpResponse(\'支付失败\')
d.进行测试
启动项目,访问index页面,输入支付金额,点击支付
使用下载的沙箱钱包扫描付款
付款成功
最后会重定向到return_url
注意:配置文件信息可以在setting中设置,要完成全部测试需要有一个公网IP和服务器,来测试支付宝向app_notify_url发送的POST请求
ALLOWED_HOSTS = [\'*\', ]
# 支付相关配置
APPID = "***6082500309412"
NOTIFY_URL = "http://127.0.0.1:8800/update_order/"
RETURN_URL = "http://127.0.0.1:8800/pay_result/"
PRI_KEY_PATH = "keys/app_private_2048.txt"
PUB_KEY_PATH = "keys/alipay_public_2048.txt"
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