1.下载相关的库
微信官方已经提供了方便开发者的SDK,可是使用pip方式下载:
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pip install wechatpy
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2. 在项目的settings.py文件添加相关配置
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WECHAT = {
'APPID' : 'appid' , # 小程序ID
'APPSECRET' : 'appsecret' , # 小程序SECRET
'MCH_ID' : 'mch_id' , # 商户号
'TOTAL_FEE' : '1' , # 总金额, 单位为“分”
'SPBILL_CREATE_IP' : '127.0.0.1' , # 终端IP
'NOTIFY_URL' : 'http://127.0.0.1:8000/wechat/payNotify/' , # 通知地址
'TRADE_TYPE' : 'JSAPI' , # 交易类型
'MERCHANT_KEY' : 'merchant_key' , # 商户KEY
'BODY' : '商品描述' , # 商品描述
}
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3. 给Django项目新建app
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例如我新建的app为:
Pay
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在settings.py文件的
INSTALLED_APPS
添加刚才新建的app
4. 编写app/views.py:
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from django.http import HttpResponse
import requests
import json
from django.conf import settings
from wechatpy.pay import WeChatPay
from app_base.base_viewset import BaseAPIView
from rest_framework import permissions
from lxml import etree as et
from rest_framework import status
class WeChatPayViewSet(BaseAPIView):
"""
通过小程序前端 wx.login() 接口获取临时登录凭证 code
将 code 作为参数传入,调用 get_user_info() 方法获取 openid
"""
def get_user_info( self , js_code):
"""
使用 临时登录凭证code 获取 session_key 和 openid 等
支付部分仅需 openid,如需其他用户信息请按微信官方开发文档自行解密
"""
req_params = {
'appid' : settings.WECHAT[ 'APPID' ],
'secret' : settings.WECHAT[ 'APPSECRET' ],
'js_code' : js_code,
'grant_type' : 'authorization_code' ,
}
user_info = requests.get( 'https://api.weixin.qq.com/sns/jscode2session' ,
params = req_params, timeout = 3 , verify = False )
return user_info.json()
def get( self , request):
code = request.GET.get( "code" , None )
openid = self .get_user_info(code)[ 'openid' ]
pay = WeChatPay(settings.WECHAT[ 'APPID' ], settings.WECHAT[ 'MERCHANT_KEY' ], settings.WECHAT[ 'MCH_ID' ])
order = pay.order.create(
trade_type = settings.WECHAT[ 'TRADE_TYPE' ], # 交易类型,小程序取值:JSAPI
body = settings.WECHAT[ 'BODY' ], # 商品描述,商品简单描述
total_fee = settings.WECHAT[ 'TOTAL_FEE' ], # 标价金额,订单总金额,单位为分
notify_url = settings.WECHAT[ 'NOTIFY_URL' ], # 通知地址,异步接收微信支付结果通知的回调地址,通知url必须为外网可访问的url,不能携带参数。
user_id = openid # 用户标识,trade_type=JSAPI,此参数必传,用户在商户appid下的唯一标识。
)
wxpay_params = pay.jsapi.get_jsapi_params(order[ 'prepay_id' ])
return HttpResponse(json.dumps(wxpay_params))
class WeChatPayNotifyViewSet(BaseAPIView):
permission_classes = (permissions.AllowAny, )
def get( self , request):
_xml = request.body
# 拿到微信发送的xml请求 即微信支付后的回调内容
xml = str (_xml, encoding = "utf-8" )
print ( "xml" , xml)
return_dict = {}
tree = et.fromstring(xml)
# xml 解析
return_code = tree.find( "return_code" ).text
try :
if return_code = = 'FAIL' :
# 官方发出错误
return_dict[ 'message' ] = '支付失败'
# return Response(return_dict, status=status.HTTP_400_BAD_REQUEST)
elif return_code = = 'SUCCESS' :
# 拿到自己这次支付的 out_trade_no
_out_trade_no = tree.find( "out_trade_no" ).text
# TODO 这里省略了 拿到订单号后的操作 看自己的业务需求
except Exception as e:
pass
finally :
return HttpResponse(return_dict, status = status.HTTP_200_OK)
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补充一些继承的类:
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# -*- coding: utf-8 -*-
from rest_framework.authentication import TokenAuthentication
from rest_framework.views import APIView
from rest_framework import permissions
__author__ = 'JayChen'
class BaseAPIView(APIView):
permission_classes = (permissions.IsAuthenticated,)
# authentication_classes = (TokenAuthentication,)
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5. 给Pay app添加urls.py并编写:
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# -*- coding: utf-8 -*-
__author__ = 'JayChen'
from django.conf.urls import url
from rest_framework.urlpatterns import format_suffix_patterns
from pay import views
app_name = 'pay'
urlpatterns = [
# 微信小程序支付
url(r '^pay/' , views.WeChatPayViewSet.as_view(), name = 'pay' ),
# 支付结果回调
url(r '^payNotify/' , views.WeChatPayNotifyViewSet.as_view(), name = 'pay_notify' ),
]
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6.在项目的urls.py添加上面新增的urls.py
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from django.contrib import admin
from django.urls import path, include
from rest_framework_jwt.views import obtain_jwt_token
urlpatterns = [
path( 'admin/' , admin.site.urls),
path( 'token_auth/' , obtain_jwt_token, name = 'jwt_token' ),
path( 'user/' , include( 'auth_jwt.urls' )),
path( 'wechat/' , include( 'pay.urls' )), # 微信支付相关
]
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7.调试
微信小程序登陆后会得到一个code,把这个code作为参数发送给Django项目的后端:
例如:http://0.0.0.0:8000/wechat/pay/?code=033h0P0w3ANPRU2ntl0w36HHyy1h0P08
注意:这个code每次登录都会返回,并且只能使用一次,然后就失效。
返回的数据:
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{
"appId" : "wx14b75285dfe1" ,
"timeStamp" : "1595228" ,
"nonceStr" : "1Wtu5lKb6T3fJLiNzc09ay2Z" ,
"signType" : "MD5" ,
"package" : "prepay_id=wx02158826854686197390000" ,
"paySign" : "89599A11E051D3B20FF57"
}
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小程序拿到这些数据就能调起支付。
到此这篇关于Django实现微信小程序支付的文章就介绍到这了,更多相关Django实现微信小程序支付内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家!
原文链接:https://blog.csdn.net/weixin_42935779/article/details/108360863