Python實(shí)現(xiàn)的微信支付方式總結(jié)【三種方式】

更新時(shí)間：2019年04月13日 13:53:27 作者：微信1257309054

這篇文章主要介紹了Python實(shí)現(xiàn)的微信支付方式,結(jié)合實(shí)例形式總結(jié)分析了Python實(shí)現(xiàn)的三種微信支付方式及相關(guān)操作步驟、原理、注意事項(xiàng),需要的朋友可以參考下

本文實(shí)例講述了Python實(shí)現(xiàn)的微信支付方式。分享給大家供大家參考，具體如下：

一、準(zhǔn)備環(huán)境

1、要有微信公眾號(hào)，商戶(hù)平臺(tái)賬號(hào)

https://pay.weixin.qq.com/wiki/doc/api/index.html

2、支持的支付方式有

3、備案域名

選擇掃碼支付，如果使用模式二則不需要域名，只需要可訪(fǎng)問(wèn)的ip地址就行。

4、建一個(gè)Django項(xiàng)目。

一、掃碼支付

點(diǎn)擊“掃碼支付”按官方文檔配置好回調(diào)url(具體如何配置看官網(wǎng))
先從公眾號(hào)上獲取APP_ID，APP_SECRECT，從商戶(hù)平臺(tái)上獲取MCH_ID，API_KEY

1、使用模式一生成支付二維碼

這個(gè)二維碼是沒(méi)有時(shí)間限制的。

create_qrcode.html

創(chuàng)建二維碼頁(yè)面

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>生成掃碼支付二維碼</title>
</head>
<body>
<form method="post" action="/wxpay/QRcode/" >
輸入手機(jī)號(hào)：<input name="phone"/>
<input id="submit" type="submit" value="生成二維碼">
  <br>
  {% if img_url %}
    <img src="{{ img_url }}" style="width: 200px;height: 200px"/>
  {% endif %}
<br>
{{ url }}
</form>
</body>
</html>

pay_settings.py

#微信支付配置
# ========支付相關(guān)配置信息===========
import random
import time
import hashlib
from random import Random
import qrcode
from bs4 import BeautifulSoup
APP_ID = "xxx" # 你公眾賬號(hào)上的appid
MCH_ID = "xxx" # 你的商戶(hù)號(hào)
API_KEY = "xxx" # 微信商戶(hù)平臺(tái)(pay.weixin.qq.com) -->賬戶(hù)設(shè)置 -->API安全 -->密鑰設(shè)置，設(shè)置完成后把密鑰復(fù)制到這里
APP_SECRECT = "xxx"
UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder" # 該url是微信下單api
NOTIFY_URL = "http://xxx/" # 微信支付結(jié)果回調(diào)接口，需要改為你的服務(wù)器上處理結(jié)果回調(diào)的方法路徑
CREATE_IP = 'xxx' # 你服務(wù)器的IP
def random_str(randomlength=8):
  """
  生成隨機(jī)字符串
  :param randomlength: 字符串長(zhǎng)度
  :return:
  """
  str = ''
  chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789'
  length = len(chars) - 1
  random = Random()
  for i in range(randomlength):
    str+=chars[random.randint(0, length)]
  return str
def order_num(phone):
  """
  生成掃碼付款訂單號(hào)
  :param phone: 手機(jī)號(hào)
  :return:
  """
  local_time = time.strftime('%Y%m%d%H%M%S', time.localtime(time.time()))
  result = phone + 'T' + local_time + random_str(5)
  return result
def get_sign(data_dict, key):
  # 簽名函數(shù)，參數(shù)為簽名的數(shù)據(jù)和密鑰
  params_list = sorted(data_dict.items(), key=lambda e: e[0], reverse=False) # 參數(shù)字典倒排序?yàn)榱斜?
  params_str = "&".join(u"{}={}".format(k, v) for k, v in params_list) + '&key=' + key
  # 組織參數(shù)字符串并在末尾添加商戶(hù)交易密鑰
  md5 = hashlib.md5() # 使用MD5加密模式
  md5.update(params_str.encode('utf-8')) # 將參數(shù)字符串傳入
  sign = md5.hexdigest().upper() # 完成加密并轉(zhuǎn)為大寫(xiě)
  return sign
def trans_dict_to_xml(data_dict): # 定義字典轉(zhuǎn)XML的函數(shù)
  data_xml = []
  for k in sorted(data_dict.keys()): # 遍歷字典排序后的key
    v = data_dict.get(k) # 取出字典中key對(duì)應(yīng)的value
    if k == 'detail' and not v.startswith('<![CDATA['): # 添加X(jué)ML標(biāo)記
      v = '<![CDATA[{}]]>'.format(v)
    data_xml.append('<{key}>{value}</{key}>'.format(key=k, value=v))
  return '<xml>{}</xml>'.format(''.join(data_xml)).encode('utf-8') # 返回XML，并轉(zhuǎn)成utf-8，解決中文的問(wèn)題
def trans_xml_to_dict(data_xml):
  soup = BeautifulSoup(data_xml, features='xml')
  xml = soup.find('xml') # 解析XML
  if not xml:
    return {}
  data_dict = dict([(item.name, item.text) for item in xml.find_all()])
  return data_dict
def wx_pay_unifiedorde(detail):
  """
  訪(fǎng)問(wèn)微信支付統(tǒng)一下單接口
  :param detail:
  :return:
  """
  detail['sign'] = get_sign(detail, API_KEY)
  # print(detail)
  xml = trans_dict_to_xml(detail) # 轉(zhuǎn)換字典為XML
  response = requests.request('post', UFDODER_URL, data=xml) # 以POST方式向微信公眾平臺(tái)服務(wù)器發(fā)起請(qǐng)求
  # data_dict = trans_xml_to_dict(response.content) # 將請(qǐng)求返回的數(shù)據(jù)轉(zhuǎn)為字典
  return response.content
def pay_fail(err_msg):
  """
  微信支付失敗
  :param err_msg: 失敗原因
  :return:
  """
  data_dict = {'return_msg': err_msg, 'return_code': 'FAIL'}
  return trans_dict_to_xml(data_dict)
def create_qrcode(phone,url):
  """
  生成掃碼支付二維碼
  :param phone: 手機(jī)號(hào)
  :param url: 支付路由
  :return:
  """
  img = qrcode.make(url) # 創(chuàng)建支付二維碼片
  # 你存放二維碼的地址
  img_url = r'media/QRcode' + '/' + phone + '.png'
  img.save(img_url)
  return img_url

views.py

from django.shortcuts import render
from django.http import HttpResponse
from django.views import View
from django.views.decorators.csrf import csrf_exempt
from pay_settings.py import *
class Wxpay_QRccode(View):
  """
  生成微信支付二維碼
  """
  def get(self, request, *args, **kwargs):
    return render(request, 'create_qrcode.html')
  def post(self, request, *args, **kwargs):
    """
    # 生成可掃碼支付的二維碼
    :param request:
    :param args:
    :param kwargs:
    :return:
    """
    phone = request.data.get('phone', None)
    if not phone:
      return HttpResponse('手機(jī)號(hào)獲取失敗')
    paydict = {
      'appid': APP_ID,
      'mch_id': MCH_ID,
      'nonce_str': random_str(phone),
      'product_id': phone, # 商品id，可自定義
      'time_stamp': int(time.time()),
    }
    paydict['sign'] = get_sign(paydict, API_KEY)
    url = "weixin://wxpay/bizpayurl?appid=%s&mch_id=%s&nonce_str=%s&product_id=%s&time_stamp=%s&sign=%s" \
       % (paydict['appid'], paydict['mch_id'], paydict['nonce_str'], paydict['product_id'], paydict['time_stamp'], paydict['sign'])
    # 可以直接在微信中點(diǎn)擊該url，如果有錯(cuò)誤，微信會(huì)彈出提示框，如果是掃碼，如果失敗，什么提示都沒(méi)有，不利于調(diào)試
    print(url)
    # 創(chuàng)建二維碼
    img_url = create_qrcode(url)
    return render(request, 'create_qrcode.html', context={'img_url': img_url})
@method_decorator(csrf_exempt, name='dispatch')
class Wxpay_ModelOne_pay(View):
  """
  使用微信掃一掃掃描二維碼，微信系統(tǒng)會(huì)自動(dòng)回調(diào)此路由，Post請(qǐng)求
  """
  def post(self, request, *args, **kwargs):
    """
    掃描二維碼后，微信系統(tǒng)回調(diào)的地址處理
    微信傳來(lái)的參數(shù)格式經(jīng)trans_xml_to_dict()轉(zhuǎn)成字典
    {'openid': 'xxx',
     'is_subscribe': 'Y',
     'mch_id': 'xxx',
     'nonce_str': 'xxx',
     'sign': 'xxx',
     'product_id': 'xxx',
     'appid': 'xxx'}
    :param request:
    :param args:
    :param kwargs:
    :return:
    """
    data_dict = trans_xml_to_dict(request.body) # 回調(diào)數(shù)據(jù)轉(zhuǎn)字典
    sign = data_dict.pop('sign') # 取出簽名
    key = API_KEY # 商戶(hù)交易密鑰
    back_sign = get_sign(data_dict, key) # 計(jì)算簽名
    if sign == back_sign: # 驗(yàn)證簽名是否與回調(diào)簽名相同
      total_fee = 1 # 付款金額，單位是分，必須是整數(shù)
      params = {
        'appid': APP_ID, # APPID
        'mch_id': MCH_ID, # 商戶(hù)號(hào)
        'nonce_str': random_str(16), # 隨機(jī)字符串
        'out_trade_no': order_num(data_dict['product_id']), # 訂單編號(hào)
        'total_fee': total_fee, # 訂單總金額
        'spbill_create_ip': CREATE_IP, # 發(fā)送請(qǐng)求服務(wù)器的IP地址
        'notify_url': NOTIFY_URL,
        'body': 'xxx公司',  # 商品描述
        'detail': 'xxx商品', # 商品詳情
        'trade_type': 'NATIVE', # 掃碼支付類(lèi)型
      }
      # 調(diào)用微信統(tǒng)一下單支付接口url
      notify_result = wx_pay_unifiedorde(params)
      #print(trans_xml_to_dict(notify_result))
      return HttpResponse(notify_result)
    return HttpResponse(pay_fail('交易信息有誤，請(qǐng)重新掃碼'))

2、使用模式二生成支付二維碼

這個(gè)二維碼是有時(shí)間限制的。

模式二與模式一相比，流程更為簡(jiǎn)單，不依賴(lài)設(shè)置的回調(diào)支付URL。商戶(hù)后臺(tái)系統(tǒng)先調(diào)用微信支付的統(tǒng)一下單接口，微信后臺(tái)系統(tǒng)返回鏈接參數(shù)code_url，商戶(hù)后臺(tái)系統(tǒng)將code_url值生成二維碼圖片，用戶(hù)使用微信客戶(hù)端掃碼后發(fā)起支付。注意：code_url有效期為2小時(shí)，過(guò)期后掃碼不能再發(fā)起支付。具體流程看微信公眾號(hào)。

主體代碼：

pay_settings.py

#微信支付配置
# ========支付相關(guān)配置信息===========
import random
import time
import hashlib
from random import Random
from bs4 import BeautifulSoup
APP_ID = "xxx" # 你公眾賬號(hào)上的appid
MCH_ID = "xxx" # 你的商戶(hù)號(hào)
API_KEY = "xxx" # 微信商戶(hù)平臺(tái)(pay.weixin.qq.com) -->賬戶(hù)設(shè)置 -->API安全 -->密鑰設(shè)置，設(shè)置完成后把密鑰復(fù)制到這里
APP_SECRECT = "xxx"
UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder" # 該url是微信下單api
NOTIFY_URL = "http://xxx/" # 微信支付結(jié)果回調(diào)接口，需要改為你的服務(wù)器上處理結(jié)果回調(diào)的方法路徑
CREATE_IP = 'xxx' # 你服務(wù)器的IP
def get_sign(data_dict, key): 
  """
  簽名函數(shù)
  :param data_dict: 需要簽名的參數(shù)，格式為字典
  :param key: 密鑰 ，即上面的API_KEY
  :return: 字符串
  """
  params_list = sorted(data_dict.items(), key=lambda e: e[0], reverse=False) # 參數(shù)字典倒排序?yàn)榱斜?
  params_str = "&".join(u"{}={}".format(k, v) for k, v in params_list) + '&key=' + key
  # 組織參數(shù)字符串并在末尾添加商戶(hù)交易密鑰
  md5 = hashlib.md5() # 使用MD5加密模式
  md5.update(params_str.encode('utf-8')) # 將參數(shù)字符串傳入
  sign = md5.hexdigest().upper() # 完成加密并轉(zhuǎn)為大寫(xiě)
  return sign
def order_num(phone):
  """
  生成掃碼付款訂單號(hào)
  :param phone: 手機(jī)號(hào)
  :return:
  """
  local_time = time.strftime('%Y%m%d%H%M%S', time.localtime(time.time()))
  result = phone + 'T' + local_time + random_str(5)
  return result
def random_str(randomlength=8):
  """
  生成隨機(jī)字符串
  :param randomlength: 字符串長(zhǎng)度
  :return: 
  """
  strs = ''
  chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789'
  length = len(chars) - 1
  random = Random()
  for i in range(randomlength):
    strs += chars[random.randint(0, length)]
  return strs
def trans_dict_to_xml(data_dict):
  """
  定義字典轉(zhuǎn)XML的函數(shù)
  :param data_dict: 
  :return: 
  """
  data_xml = []
  for k in sorted(data_dict.keys()): # 遍歷字典排序后的key
    v = data_dict.get(k) # 取出字典中key對(duì)應(yīng)的value
    if k == 'detail' and not v.startswith('<![CDATA['): # 添加X(jué)ML標(biāo)記
      v = '<![CDATA[{}]]>'.format(v)
    data_xml.append('<{key}>{value}</{key}>'.format(key=k, value=v))
  return '<xml>{}</xml>'.format(''.join(data_xml)) # 返回XML
def trans_xml_to_dict(data_xml):
  """
  定義XML轉(zhuǎn)字典的函數(shù)
  :param data_xml: 
  :return: 
  """
  soup = BeautifulSoup(data_xml, features='xml')
  xml = soup.find('xml') # 解析XML
  if not xml:
    return {}
  data_dict = dict([(item.name, item.text) for item in xml.find_all()])
  return data_dict

views.py

import qrcode
from django.shortcuts import render
from pay_settings import *
from django.http import HttpResponse
from django.views import View
class WXPayView(View):
  def get(self,request):
    # 在info.html有一個(gè)按鈕，點(diǎn)擊后跳轉(zhuǎn)到這個(gè)類(lèi)的post()中，具體urls.py設(shè)置不詳述
    return render(request, 'info.html')
  def post(self,request):
    phone = request.POST.get('phone','')
    if not phone:
      return render(request, 'info.html', {'err_msg': '獲取手機(jī)號(hào)失敗'})
    data_dict = wxpay(phone)
    if data_dict.get('return_code') == 'SUCCESS': # 如果請(qǐng)求成功
      qrcode_name = phone + '.png' # 二維碼圖片名稱(chēng)
      img = qrcode.make(data_dict.get('code_url')) # 創(chuàng)建支付二維碼片
      img.save(r'static' + '/' + qrcode_name) 
      return render(request, 'qrcode.html', {'qrcode_img': qrcode_name})
    return render(request, 'info.html', {'err_msg': '獲取微信的code_url失敗'})
def wxpay(phone):
  nonce_str = random_str() # 拼接出隨機(jī)的字符串即可，我這里是用 時(shí)間+隨機(jī)數(shù)字+5個(gè)隨機(jī)字母
  total_fee = 1 # 付款金額，單位是分，必須是整數(shù)
  params = {
    'appid': APP_ID, # APPID
    'mch_id': MCH_ID, # 商戶(hù)號(hào)
    'nonce_str': nonce_str,  # 隨機(jī)字符串
    'out_trade_no': order_num(phone), # 訂單編號(hào)，可自定義
    'total_fee': total_fee, # 訂單總金額
    'spbill_create_ip': CREATE_IP, # 自己服務(wù)器的IP地址
    'notify_url': NOTIFY_URL, # 回調(diào)地址，微信支付成功后會(huì)回調(diào)這個(gè)url，告知商戶(hù)支付結(jié)果
    'body': 'xxx公司', # 商品描述
    'detail': 'xxx商品', # 商品描述
    'trade_type': 'NATIVE', # 掃碼支付類(lèi)型
  }
  sign = get_sign(params,API_KEY) # 獲取簽名
  params['sign'] = sign # 添加簽名到參數(shù)字典
  # print(params)
  xml = trans_dict_to_xml(params) # 轉(zhuǎn)換字典為XML
  response = requests.request('post', settings._UFDODER_URL, data=xml) # 以POST方式向微信公眾平臺(tái)服務(wù)器發(fā)起請(qǐng)求
  data_dict = trans_xml_to_dict(response.content) # 將請(qǐng)求返回的數(shù)據(jù)轉(zhuǎn)為字典
  return data_dict
class Wxpay_Result(View):
  """
  微信支付結(jié)果回調(diào)通知路由
  """
  def get(self, request, *args, **kwargs):
    machine_code = request.GET.get('machine_code', '獲取機(jī)器編號(hào)失敗')
    # 返回支付成功頁(yè)面，可自定義
    return render(request, 'zfcg.html', {'machine': {'machine_code': machine_code}})
  def post(self, request, *args, **kwargs):
    """
    微信支付成功后會(huì)自動(dòng)回調(diào)
    返回參數(shù)為：
    {'mch_id': '',
    'time_end': '',
    'nonce_str': '',
    'out_trade_no': '',
    'trade_type': '',
    'openid': '',
     'return_code': '',
     'sign': '',
     'bank_type': '',
     'appid': '',
     'transaction_id': '',
     'cash_fee': '',
     'total_fee': '',
     'fee_type': '', '
     is_subscribe': '',
     'result_code': 'SUCCESS'}
    :param request:
    :param args:
    :param kwargs:
    :return:
    """
    data_dict = trans_xml_to_dict(request.body) # 回調(diào)數(shù)據(jù)轉(zhuǎn)字典
    # print('支付回調(diào)結(jié)果', data_dict)
    sign = data_dict.pop('sign') # 取出簽名
    back_sign = get_sign(data_dict, API_KEY) # 計(jì)算簽名
    # 驗(yàn)證簽名是否與回調(diào)簽名相同
    if sign == back_sign and data_dict['return_code'] == 'SUCCESS':
      '''
      檢查對(duì)應(yīng)業(yè)務(wù)數(shù)據(jù)的狀態(tài)，判斷該通知是否已經(jīng)處理過(guò)，如果沒(méi)有處理過(guò)再進(jìn)行處理，如果處理過(guò)直接返回結(jié)果成功。
      '''
      print('微信支付成功會(huì)回調(diào)！')
      # 處理支付成功邏輯
      # 返回接收結(jié)果給微信，否則微信會(huì)每隔8分鐘發(fā)送post請(qǐng)求
      return HttpResponse(trans_dict_to_xml({'return_code': 'SUCCESS', 'return_msg': 'OK'}))
    return HttpResponse(trans_dict_to_xml({'return_code': 'FAIL', 'return_msg': 'SIGNERROR'}))

二、使用JsAPI發(fā)起微信支付

在微信公眾號(hào)中左下角設(shè)置->公眾號(hào)設(shè)置->功能設(shè)置,把業(yè)務(wù)域名，js接口安全域名，網(wǎng)頁(yè)授權(quán)域名設(shè)置好。

用戶(hù)在微信中點(diǎn)擊一個(gè)路由Url(可把這個(gè)url封裝成二維碼).在后臺(tái)中的views.py中的WxJsAPIPay類(lèi)中使用get()函數(shù)處理用戶(hù)的請(qǐng)求，先獲取用戶(hù)的openid，然后調(diào)用微信統(tǒng)一下單接口，獲取prepay_id，具體看官網(wǎng)。

wx_js_pay.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0" id="vp"/>
{#    <script type="text/javascript" src="/static/js/rem.js"></script>#}
{#    <link rel="stylesheet" type="text/css" href="/static/css/base.css" rel="external nofollow" />#}
{#    <link rel="stylesheet" type="text/css" href="/static/css/index.css" rel="external nofollow" />#}
  </head>
  <body>
    <div class="bigbox">
      <div class="top">
        <span>訂單詳情</span>
      </div>
      <div class="zhong">
      </div>
      <div class="zhifu">
        <button class="btn" type="button" onclick="javascript:callpay();return false;">立即支付</button>
      </div>
    </div>
<script src="https://cdn.bootcss.com/jquery/1.12.1/jquery.js"></script>
<script type="text/javascript">
  //調(diào)用微信JS api 支付
  function onBridgeReady() {
    WeixinJSBridge.invoke(
      'getBrandWCPayRequest',
      {
        appId: "{{ params.appid }}",    //公眾號(hào)名稱(chēng)，由商戶(hù)傳入
        timeStamp: "{{ params.timeStamp }}", //時(shí)間戳，自1970年以來(lái)的秒數(shù)
        nonceStr: "{{ params.nonceStr }}", //隨機(jī)串
        package: "prepay_id={{ params.prepay_id }}", //預(yù)支付id
        signType: "MD5", //微信簽名方式
        paySign: "{{ params.sign }}"   //微信簽名
      },
      function (res) {
        //支付成功后返回 get_brand_wcpay_request:ok
        if (res.err_msg == "get_brand_wcpay_request:ok") {
          // 跳轉(zhuǎn)到支付成功的頁(yè)面
          window.location.href = '#';
          {#alert('支付成功');#}
        } else if (res.err_msg == "get_brand_wcpay_request:cancel") {
          alert("您已取消支付!");
          {#alert({{ params.machine_code }});#}
          {#window.location.href = '';#}
        } else if (res.err_msg == "get_brand_wcpay_request:fail") {
          $.each(res, function(key,value){
            alert(value);
            });
          alert("支付失敗!");
        }
      }
    );
  }
  function callpay() {
    if (typeof WeixinJSBridge == "undefined") {
      if (document.addEventListener) {
        document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
      } else if (document.attachEvent) {
        document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
        document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
      }
    } else {
      onBridgeReady();
    }
  }
</script>
  </body>
</html>

pay_settings.py

# encoding: utf-8
import hashlib
import time
import requests
from collections import OrderedDict
from random import Random
from bs4 import BeautifulSoup
APP_ID = "xxx" # 公眾賬號(hào)appid
MCH_ID = "xxx" # 商戶(hù)號(hào)
API_KEY = "xxx" # 微信商戶(hù)平臺(tái)(pay.weixin.qq.com) -->賬戶(hù)設(shè)置 -->API安全 -->密鑰設(shè)置，設(shè)置完成后把密鑰復(fù)制到這里
APP_SECRECT = "xxx"
UFDODER_URL = "https://api.mch.weixin.qq.com/pay/unifiedorder" # url是微信下單api
NOTIFY_URL = "http://xxx/wxpay/pay_result/" # 微信支付結(jié)果回調(diào)接口,需要你自定義
CREATE_IP = 'xxx' # 你服務(wù)器上的ip
# 生成隨機(jī)字符串
def random_str(randomlength=8):
  """
  生成隨機(jī)字符串
  :param randomlength: 字符串長(zhǎng)度
  :return:
  """
  str = ''
  chars = 'AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz0123456789'
  length = len(chars) - 1
  random = Random()
  for i in range(randomlength):
    str+=chars[random.randint(0, length)]
  return str
def order_num(phone):
  """
  生成掃碼付款訂單,
  :param phone: 
  :return:
  """
  local_time = time.strftime('%Y%m%d%H%M%S', time.localtime(time.time()))
  result = phone + 'T' + local_time + random_str(5)
  return result
def get_sign(data_dict, key):
  # 簽名函數(shù)，參數(shù)為簽名的數(shù)據(jù)和密鑰
  params_list = sorted(data_dict.items(), key=lambda e: e[0], reverse=False) # 參數(shù)字典倒排序?yàn)榱斜?
  params_str = "&".join(u"{}={}".format(k, v) for k, v in params_list) + '&key=' + key
  # 組織參數(shù)字符串并在末尾添加商戶(hù)交易密鑰
  md5 = hashlib.md5() # 使用MD5加密模式
  md5.update(params_str.encode('utf-8')) # 將參數(shù)字符串傳入
  sign = md5.hexdigest().upper() # 完成加密并轉(zhuǎn)為大寫(xiě)
  return sign
def trans_dict_to_xml(data_dict): # 定義字典轉(zhuǎn)XML的函數(shù)
  data_xml = []
  for k in sorted(data_dict.keys()): # 遍歷字典排序后的key
    v = data_dict.get(k) # 取出字典中key對(duì)應(yīng)的value
    if k == 'detail' and not v.startswith('<![CDATA['): # 添加X(jué)ML標(biāo)記
      v = '<![CDATA[{}]]>'.format(v)
    data_xml.append('<{key}>{value}</{key}>'.format(key=k, value=v))
  return '<xml>{}</xml>'.format(''.join(data_xml)).encode('utf-8') # 返回XML，并轉(zhuǎn)成utf-8，解決中文的問(wèn)題
def trans_xml_to_dict(data_xml):
  soup = BeautifulSoup(data_xml, features='xml')
  xml = soup.find('xml') # 解析XML
  if not xml:
    return {}
  data_dict = dict([(item.name, item.text) for item in xml.find_all()])
  return data_dict
def wx_pay_unifiedorde(detail):
  """
  訪(fǎng)問(wèn)微信支付統(tǒng)一下單接口
  :param detail:
  :return:
  """
  detail['sign'] = get_sign(detail, API_KEY)
  # print(detail)
  xml = trans_dict_to_xml(detail) # 轉(zhuǎn)換字典為XML
  response = requests.request('post', UFDODER_URL, data=xml) # 以POST方式向微信公眾平臺(tái)服務(wù)器發(fā)起請(qǐng)求
  # data_dict = trans_xml_to_dict(response.content) # 將請(qǐng)求返回的數(shù)據(jù)轉(zhuǎn)為字典
  return response.content
def get_redirect_url():
  """
  獲取微信返回的重定向的url
  :return: url,其中攜帶code
  """
  WeChatcode = 'https://open.weixin.qq.com/connect/oauth2/authorize'
  urlinfo = OrderedDict()
  urlinfo['appid'] = APP_ID
  urlinfo['redirect_uri'] = 'http://xxx/wxjsapipay/?getInfo=yes' # 設(shè)置重定向路由
  urlinfo['response_type'] = 'code'
  urlinfo['scope'] = 'snsapi_base' # 只獲取基本信息
  urlinfo['state'] = 'mywxpay'  # 自定義的狀態(tài)碼
  info = requests.get(url=WeChatcode, params=urlinfo)
  return info.url
def get_openid(code,state):
  """
  獲取微信的openid
  :param code:
  :param state:
  :return:
  """
  if code and state and state == 'mywxpay':
    WeChatcode = 'https://api.weixin.qq.com/sns/oauth2/access_token'
    urlinfo = OrderedDict()
    urlinfo['appid'] = APP_ID
    urlinfo['secret'] = APP_SECRECT
    urlinfo['code'] = code
    urlinfo['grant_type'] = 'authorization_code'
    info = requests.get(url=WeChatcode, params=urlinfo)
    info_dict = eval(info.content.decode('utf-8'))
    return info_dict['openid']
  return None
def get_jsapi_params(openid):
  """
  獲取微信的Jsapi支付需要的參數(shù)
  :param openid: 用戶(hù)的openid
  :return:
  """
  total_fee = 1 # 付款金額，單位是分，必須是整數(shù)
  params = {
    'appid': APP_ID, # APPID
    'mch_id': MCH_ID, # 商戶(hù)號(hào)
    'nonce_str': random_str(16), # 隨機(jī)字符串
    'out_trade_no': order_num('123'), # 訂單編號(hào),可自定義
    'total_fee': total_fee, # 訂單總金額
    'spbill_create_ip': CREATE_IP, # 發(fā)送請(qǐng)求服務(wù)器的IP地址
    'openid': openid,
    'notify_url': NOTIFY_URL, # 支付成功后微信回調(diào)路由
    'body': 'xxx公司', # 商品描述
    'trade_type': 'JSAPI', # 公眾號(hào)支付類(lèi)型
  }
  # print(params)
  # 調(diào)用微信統(tǒng)一下單支付接口url
  notify_result = wx_pay_unifiedorde(params)
  params['prepay_id'] = trans_xml_to_dict(notify_result)['prepay_id']
  params['timeStamp'] = int(time.time())
  params['nonceStr'] = random_str(16)
  params['sign'] = get_sign({'appId': APP_ID,
                "timeStamp": params['timeStamp'],
                'nonceStr': params['nonceStr'],
                'package': 'prepay_id=' + params['prepay_id'],
                'signType': 'MD5',
                },
               API_KEY)
  return params

views.py

from django.http import HttpResponseRedirect, HttpResponse
from django.shortcuts import render
from django.views import View
from pay_settings import *
class WxJsAPIPay(View):
  def get(self, request, *args, **kwargs):
    """
    用戶(hù)點(diǎn)擊一個(gè)路由或者掃碼進(jìn)入這個(gè)views.py中的函數(shù)，首先獲取用戶(hù)的openid,
    使用jsapi方式支付需要此參數(shù)
    :param self:
    :param request:
    :param args:
    :param kwargs:
    :return:
    """
    getInfo = request.GET.get('getInfo', None)
    openid = request.COOKIES.get('openid', '')
    if not openid:
      if getInfo != 'yes':
      # 構(gòu)造一個(gè)url，攜帶一個(gè)重定向的路由參數(shù)，
      # 然后訪(fǎng)問(wèn)微信的一個(gè)url,微信會(huì)回調(diào)你設(shè)置的重定向路由，并攜帶code參數(shù)
        return HttpResponseRedirect(get_redirect_url())
      elif getInfo == 'yes':
   # 我設(shè)置的重定向路由還是回到這個(gè)函數(shù)中，其中設(shè)置了一個(gè)getInfo=yes的參數(shù)
      # 獲取用戶(hù)的openid
        openid = get_openid(request.GET.get('code'), request.GET.get('state', ''))
        if not openid:
          return HttpResponse('獲取用戶(hù)openid失敗')
        response = render_to_response('wx_js_pay.html', context={'params': get_jsapi_params(openid)})
        response.set_cookie('openid', openid, expires=60 * 60 * 24 *30)
        return response
      else:
        return HttpResponse('獲取機(jī)器編碼失敗')
    else:
      return render(request, 'wx_js_pay.html', context={'params': get_jsapi_params(openid)})

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