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Django對接支付寶實(shí)現(xiàn)支付寶充值金幣功能示例

更新時(shí)間：2019年12月17日 09:46:08 作者：Pykk2019

今天小編就為大家分享一篇Django對接支付寶實(shí)現(xiàn)支付寶充值金幣功能示例，具有很好的參考價(jià)值，希望對大家有所幫助。一起跟隨小編過來看看吧

很多網(wǎng)站里都有金幣、積分之類的虛擬貨幣，獲取這些往往需要充值。那么問題來了，如何在Django中對接支付寶實(shí)現(xiàn)支付寶充值金幣的功能呢？網(wǎng)上很多資料都是電商的，那些都會帶有訂單系統(tǒng)之類比較復(fù)雜，而充值金幣功能不需要實(shí)現(xiàn)那么多功能。

效果圖如下：

現(xiàn)在就來實(shí)現(xiàn)Django對接支付寶支付功能吧！

登錄支付寶開放平臺

點(diǎn)擊進(jìn)入螞蟻金服開放平臺https://open.alipay.com/platform/home.htm

進(jìn)入支付寶沙箱環(huán)境https://openhome.alipay.com/platform/appDaily.htm?tab=info

如圖，這里是你沙箱環(huán)境的配置，左側(cè)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(fā)助手

點(diǎn)擊打開下載鏈接

打開工具，生成密鑰，然后妥善保管好??！

保存密鑰

把剛剛那個(gè)應(yīng)用公鑰2048重命名為：pub_2048.txt，把應(yīng)用私鑰2048重命名為：private_2048.txt，把這兩個(gè)文件放在項(xiàng)目目錄下。

注意：密鑰的開始和結(jié)束一定要加上如下的字符串?。?！

-----BEGIN PRIVATE KEY-----
這里粘貼里面的密鑰
-----END PRIVATE KEY-----

復(fù)制支付寶的公鑰并保存

把這段支付寶公鑰復(fù)制，重命名為alipay_key_2048.txt，保存到項(xiàng)目目錄中，注意加上如下字符串

-----BEGIN PRIVATE KEY-----
這里粘貼里面的密鑰
-----END PRIVATE KEY-----

設(shè)置公鑰

把剛剛的pub_2048.txt里面的字符串復(fù)制到如下：

調(diào)試支付寶支付接口

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.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, 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)

  # 獲得最終的訂單信息字符串
  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)

  # 將字典類型的數(shù)據(jù)dump出來
  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):
  # 開始計(jì)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(zhuǎn)換為unicode表示并移除回車
  sign = encodebytes(signature).decode("utf8").replace("\n", "")
  return sign

 def _verify(self, raw_content, signature):
  # 開始計(jì)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)


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(yàn)證支付寶回傳消息使用，不是你自己的公鑰,
  debug=True, # 默認(rèn)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能夠打開并且使用沙箱賬號支付，說明前面的配置成功了，可以進(jìn)行視圖的編寫。

設(shè)計(jì)數(shù)據(jù)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(shí)關(guān)閉'),
 ('WAIT_BUYER_PAY', '交易創(chuàng)建'),
 ('TRADE_FINISHED', '交易結(jié)束'),
 ('paying', '待支付'),
)
 user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE, verbose_name='用戶')
 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, unique=True, null=True, blank=True, verbose_name='支付訂單號')

 pay_status = models.CharField(choices=ORDER_STATUS, max_length=40, verbose_name='訂單狀態(tài)', 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(shè)置為models.DecimalField貨幣類型

然后導(dǎo)入到數(shù)據(jù)庫中

視圖函數(shù)編寫

class AlipayView(LoginRequiredMixin, AuthorRequiredMixin, View):
 """
 支付寶支付
 get方法實(shí)現(xiàn)支付寶return_url，如果沒有實(shí)現(xiàn)也無所謂，post同樣可以更新狀態(tài)
 post方法實(shí)現(xiàn)支付寶notify_url，異步更新

 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參數(shù)
  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(yàn)證簽名
  self.verify = self.alipay.verify(callback_data, sign)
  return super(AlipayView, self).dispatch(request, *args, **kwargs)


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

  if self.verify:
   self.deposit()
   #返回個(gè)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.更新用戶的金幣信息
  2.更新訂單狀態(tài)為交易成功
  """

  # 數(shù)據(jù)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(zhuǎn)換成對應(yīng)的金幣
  rmb = order.order_mount
  money = convert_rmb_to_money(rmb)

  # 更新用戶的金幣
  order.user.money += Decimal(money)
  order.user.save()
  # 訂單狀態(tài)置為交易成功
  order.pay_status = 'TRADE_SUCCESS'
  order.save()

當(dāng)用戶付款成功后，會跳轉(zhuǎn)回來，那個(gè)就是return_url，處理這個(gè)的是get方法，用來更新用戶的金幣和訂單。

以上這篇Django對接支付寶實(shí)現(xiàn)支付寶充值金幣功能示例就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。

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