支付宝付款(python)
其实蚂蚁金服提供了开放平台的官方SDK,但是github仅有十几个star, 用的可以试一下
这是根据文档中请求字段和签名流程写的支付宝的SDK, 只有一个类, 用起来也算方便.
支付宝付款的整个过程参考付款结算的所有参数, 其中对请求字段的处理最困难与sign字段的签名以及回调url的验证上, 详见sign字段的签名过程.
付款源码（复制即用）:
from datetime import datetime
from Crypto.PublicKey import RSA
from Crypto.Signature import PKCS1_v1_5
from Crypto.Hash import SHA256
from base64 import b64encode, b64decode
from urllib.parse import quote_plus
from urllib.parse import urlparse, parse_qs
from urllib.request import urlopen
from base64 import decodebytes, encodebytes
import json
class AliPay(object):
"""
支付宝支付接口
"""
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:
import ipdb
ipdb.set_trace()
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)
# 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)
付款的过程:
alipay = AliPay(
appid="",
app_notify_url="",
# 类中使用的打开硬盘内文件的方式读取私钥和支付宝公钥, 如果使用者是将钥匙放到了环境变量中可以视情况修改类中的源码
app_private_key_path="私钥路径",
alipay_public_key_path="公钥路径", # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,如果是true使用表示开发环境, 将调用正式的HTTPS请求地址, 如果是false将调用沙盒环境的HTTPS请求地址
# 这里是回调url, 如果付款结束后会将返回的参数拼接到这个url后面并做跳转
return_url="http://127.0.0.1:8000/alipay/return/"
)
# 调用付款函数, 具体字段请查看文档
url = alipay.direct_pay(
subject="测试订单2",
out_trade_no="201702021111",
total_amount=100,
return_url="http://127.0.0.1:8000/alipay/return/"
)
re_url = "https://openapi.alipaydev.com/gateway.do?{data}".format(data=url)
# 打开付款界面
webbrowser.open(re_url)
print(re_url)
对于回调url的验证
# 这里是付款成功后浏览器跳转的url
return_url = 'http://127.0.0.1:8000/alipay/return/?charset=utf-8&out_trade_no=201702021111&method=alipay.trade.page.pay.return&total_amount=100.00&sign=rZfjYJiwBNMUjqV2WQnj667LgiWCGOmAPzg2Rfdb3GW57yYN0DqpAujN9gP8ozZISGFvtt%2FMtsuBS2ksAf%2BqFe9uc7SPp84cg3I1aBb2EI1DqH%2FZCHuazjFAU1g5diQUmH37vlzP%2FS2cUCDHkldVG9%2FmXubvPg17qLPzCOql4jbC3Co2rYppIt6gq30bnNHXPJfhrjhTG0F5GnOfmkUcEvuTP2agzquY66Sx6KGlkNxTzO3z%2F4laFJygbuvmhchLDEmZm1TAi3CUuAh656LLkTYHJxVMtd5CuBYMuhX7dGE1pk6YuM4oFde1MhpFGWbql%2FC7ue3ZSVvMt8aZXL9e%2BA%3D%3D&trade_no=2018072121001004490200511991&auth_app_id=2016091900546396&version=1.0&app_id=2016091900546396&sign_type=RSA2&seller_id=2088102176308352×tamp=2018-07-21+23%3A16%3A25'
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path="/home/wukt/project/part4djagno/t1nkuy/apps/keys/app_private_key.pem",
alipay_public_key_path="/home/wukt/project/part4djagno/t1nkuy/apps/keys/alipay_public", # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
# 解析返回的url中的参数
o = urlparse(return_url)
query = parse_qs(o.query)
processed_query = {}
ali_sign = query.pop("sign")[0]
for key, value in query.items():
processed_query[key] = value[0]
# true表示验证成功, false表示验证失败
print (alipay.verify(processed_query, ali_sign))
验证notifyurl的过程类似
比如这是在视图中验证付款状态后更改订单状态的过程
class AlipayView(APIView):
def get(self, request):
"""
处理支付宝的return_url返回
:param request:
:return:
"""
processed_dict = {}
for key, value in request.GET.items():
processed_dict[key] = value
sign = processed_dict.pop("sign", None)
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
verify_re = alipay.verify(processed_dict, sign)
if verify_re is True:
order_sn = processed_dict.get('out_trade_no', None)
trade_no = processed_dict.get('trade_no', None)
trade_status = processed_dict.get('trade_status', None)
existed_orders = OrderInfo.objects.filter(order_sn=order_sn)
for existed_order in existed_orders:
existed_order.pay_status = trade_status
existed_order.trade_no = trade_no
existed_order.pay_time = datetime.now()
existed_order.save()
response = redirect("index")
response.set_cookie("nextPath","pay", max_age=3)
return response
else:
response = redirect("index")
return response
def post(self, request):
"""
处理支付宝的notify_url
:param request:
:return:
"""
processed_dict = {}
for key, value in request.POST.items():
processed_dict[key] = value
sign = processed_dict.pop("sign", None)
alipay = AliPay(
appid="",
app_notify_url="http://127.0.0.1:8000/alipay/return/",
app_private_key_path=private_key_path,
alipay_public_key_path=ali_pub_key_path, # 支付宝的公钥，验证支付宝回传消息使用，不是你自己的公钥,
debug=True, # 默认False,
return_url="http://127.0.0.1:8000/alipay/return/"
)
verify_re = alipay.verify(processed_dict, sign)
if verify_re is True:
order_sn = processed_dict.get('out_trade_no', None)
trade_no = processed_dict.get('trade_no', None)
trade_status = processed_dict.get('trade_status', None)
existed_orders = OrderInfo.objects.filter(order_sn=order_sn)
for existed_order in existed_orders:
order_goods = existed_order.goods.all()
for order_good in order_goods:
goods = order_good.goods
goods.sold_num += order_good.goods_num
goods.save()
existed_order.pay_status = trade_status
existed_order.trade_no = trade_no
existed_order.pay_time = datetime.now()
existed_order.save()
return Response("success")
看起来逻辑挺清晰的， 就是代码太冗余了。