很多網站裡都有金幣、積分之類的虛擬貨幣，獲取這些往往需要充值。那麼問題來了，如何在Django中對接支付寶實現支付寶充值金幣的功能呢？網上很多資料都是電商的，那些都會帶有訂單系統之類比較複雜，而充值金幣功能不需要實現那麼多功能。

效果圖如下：

現在就來實現Django對接支付寶支付功能吧！

登入支付寶開放平臺

點選進入螞蟻金服開放平臺https://open.alipay.com/platform/home.htm

進入支付寶沙箱環境https://openhome.alipay.com/platform/appDaily.htm?tab=info

如圖，這裡是你沙箱環境的配置，左側沙箱工具有沙箱支付寶安卓版下載，沙箱賬號是你的測試賬號。

下載支付寶開放平臺開發助手

點選開啟下載連結

開啟工具，生成金鑰，然後妥善保管好！！

儲存金鑰

把剛剛那個應用公鑰2048重新命名為：pub_2048.txt，把應用私鑰2048重新命名為：private_2048.txt，把這兩個檔案放在專案目錄下。

注意：金鑰的開始和結束一定要加上如下的字串！！！

-----BEGIN PRIVATE KEY-----
這裡貼上裡面的金鑰
-----END PRIVATE KEY-----

複製支付寶的公鑰並儲存

把這段支付寶公鑰複製，重新命名為alipay_key_2048.txt，儲存到專案目錄中，注意加上如下字串

-----BEGIN PRIVATE KEY-----
這裡貼上裡面的金鑰
-----END PRIVATE KEY-----

設定公鑰

把剛剛的pub_2048.txt裡面的字串複製到如下：

除錯支付寶支付介面

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):
 """
 支付寶支付介面
 """

 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.import_key(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,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)
  # 排序後的字串
  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)

  # 獲得最終的訂單資訊字串
  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)

  # 將字典型別的資料dump出來
  for key in complex_keys:
   data[key] = json.dumps(data[key],separators=(',',':'))

  return sorted([(k,v in data.items()])

 def sign(self,unsigned_string):
  # 開始計算簽名
  key = self.app_private_key
  signer = PKCS1_v1_5.new(key)
  signature = signer.sign(SHA256.new(unsigned_string))
  # base64 編碼，轉換為unicode表示並移除回車
  sign = encodebytes(signature).decode("utf8").replace("\n","")
  return sign

 def _verify(self,raw_content,signature):
  # 開始計算簽名
  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")
  # 排序後的字串
  unsigned_items = self.ordered_data(data)
  message = "&".join(u"{}={}".format(k,v in unsigned_items)
  return self._verify(message,signature)


def get_alipay_url(app_id,order_sn,order_mount):
 alipay = AliPay(
  appid=app_id,app_notify_url="http://127.0.0.1:8000/alipay/return/",app_private_key_path="../trade/keys/private_2048.txt",alipay_public_key_path="../trade/keys/alipay_key_2048.txt",# 支付寶的公鑰，驗證支付寶回傳訊息使用，不是你自己的公鑰,debug=True,# 預設False,return_url="http://127.0.0.1:8000/alipay/return/"
 )

 url = alipay.direct_pay(
  subject=order_sn,out_trade_no=order_sn,total_amount=order_mount,)
 re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)

 return re_url


if __name__ == "__main__":
 url = get_alipay_url(
  '2016092600597838','201902923423436',1.00
 )
 print(url)

如果輸出的url能夠開啟並且使用沙箱賬號支付，說明前面的配置成功了，可以進行檢視的編寫。

設計資料庫訂單模型

from django.db import models
from django.conf import settings
from django.utils.encoding import python_2_unicode_compatible

from questioning.utils.models import CreatedUpdatedMixin

@python_2_unicode_compatible
class OrderInfo(CreatedUpdatedMixin,models.Model):
 '''
 充值訂單詳情
 '''
 ORDER_STATUS = (
 ('TRADE_SUCCESS','交易支付成功'),('TRADE_CLOSED','未付款交易超時關閉'),('WAIT_BUYER_PAY','交易建立'),('TRADE_FINISHED','交易結束'),('paying','待支付'),)
 user = models.ForeignKey(settings.AUTH_USER_MODEL,on_delete=models.CASCADE,verbose_name='使用者')
 order_sn = models.CharField(max_length=30,null=True,blank=True,unique=True,verbose_name='訂單號')
 trade_no = models.CharField(max_length=100,verbose_name='支付訂單號')

 pay_status = models.CharField(choices=ORDER_STATUS,max_length=40,verbose_name='訂單狀態',default='paying')
 order_mount = models.DecimalField(verbose_name="充值金額",max_digits=10,decimal_places=2,default=0.00)


 class Meta:
  verbose_name = "充值訂單"
  verbose_name_plural = verbose_name

 def __str__(self):
  return self.order_sn

注意充值的金額要設定為models.DecimalField貨幣型別

然後匯入到資料庫中

檢視函式編寫

class AlipayView(LoginRequiredMixin,AuthorRequiredMixin,View):
 """
 支付寶支付
 get方法實現支付寶return_url，如果沒有實現也無所謂，post同樣可以更新狀態
 post方法實現支付寶notify_url，非同步更新

 支付寶返回的url如下：
 #http://127.0.0.1:8000/alipay/return/?
 # charset=utf-8&
 # out_trade_no=201902923423436&
 # method=alipay.trade.page.pay.return&
 # total_amount=1.00&
 # sign=CDBMY9NBsp4KICdQoBEVxGWobd0N8y4%2BU09stzUWwlNtLr7ZpELJdM5js20wXv%2FCPp0FGPbRW1YS9DRx0CnKJULZZMqysBUMH2FL39sS0Fgstgy1ydTs7ySXdHziJV0inI%2BDWAsebQqtjk5gQEweUstc%2B%2BnzjdgAulpvWzfJsbknS%2BqUfktSdF2ZOWGhr1CFlfsMFEDS2nzQv4K3E%2BNaeylkzUnRe9M1sjIL%2FYR0wVZ5A3OfHLPf9HzC2B8%2FLu4g7N5Vctkqp2aerDvIkN5SNmDnRGyjOt2b%2BOsLMqG4X06JSsrZT6Ln8PimsrkSOIGbj0gCqscx7BwZfmCQePlCw%3D%3D&
 # trade_no=2019082622001426981000041778&
 # auth_app_id=2016092600597838&
 # version=1.0&app_id=2016092600597838&
 # sign_type=RSA2&
 # seller_id=2088102177296610&
 # timestamp=2019-08-26+13%3A51%3A01
 """
 def dispatch(self,request,*args,**kwargs):
  self.alipay = AliPay(
   appid=settings.ALIPAY_APPID,app_notify_url=settings.APP_NOTIFY_URL,app_private_key_path=settings.APP_PRIVATE_KEY_PATH,alipay_public_key_path=settings.ALIPAY_PUBLIC_KEY_PATH,debug=settings.ALIPAY_DEBUG,return_url=settings.RETURN_URL
  )
  #處理返回的url引數
  callback_data = {}
  for key,value in request.GET.items():
   callback_data[key] = value
  sign = callback_data.pop('sign',None)
  self.order_sn = callback_data.get('out_trade_no',None) #訂單號
  self.trade_no = callback_data.get('trade_no',None) #支付寶訂單號

  # 驗證簽名
  self.verify = self.alipay.verify(callback_data,sign)
  return super(AlipayView,self).dispatch(request,**kwargs)


 def get(self,request):
  """處理支付寶return_url返回"""

  if self.verify:
   self.deposit()
   #返回個人中心頁面
   return redirect(reverse('users:detail',kwargs={
    'username': request.user.username
   }))

 def post(self,request):
  """
  處理notify_url
  """
  if self.verify:
   self.deposit()

  return Response('success')

 def deposit(self):
  """充值操作

  1.更新使用者的金幣資訊
  2.更新訂單狀態為交易成功
  """

  # 資料庫中查詢訂單記錄
  order = OrderInfo.objects.get(order_sn=self.order_sn)
  order.trade_no = self.trade_no # 支付寶訂單號

  # 把人民幣轉換成對應的金幣
  rmb = order.order_mount
  money = convert_rmb_to_money(rmb)

  # 更新使用者的金幣
  order.user.money += Decimal(money)
  order.user.save()
  # 訂單狀態置為交易成功
  order.pay_status = 'TRADE_SUCCESS'
  order.save()

當用戶付款成功後，會跳轉回來，那個就是return_url，處理這個的是get方法，用來更新使用者的金幣和訂單。

以上這篇Django對接支付寶實現支付寶充值金幣功能示例就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支援我們。