支付宝接口调用实现支付功能笔记

登录支付宝开放平台，进入沙箱服务。支付宝牛皮！

def alipay(request):

params = {
    "app_id": "2016102700769765",
    "method": "alipay.trade.page.pay",
    "format": "JSON",
    "return_url": "支付成功调用的网址",GET请求，一次# 
    # "notify_url": "支付成功调用的网址,POST请求，如服务器宕机，不断发送请求，直到回复成功"

    "charset": "utf-8",
    "sign_type": "RSA2",
    "sign": "签名",
    "timestamp": datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S"),
    "version": "1.0",
    "biz_content": json.dumps({
        "out_trade_no": order_num,
        "product_code": "FAST_INSTANT_TRADE_PAY",
        "total_amount": money,
        "subject": "买家："+user.user_name+"\t商家：胡吃海喝店"
    },separators=(",",":")) # 将字典转换为字符串，去掉空格。
}
print(params["timestamp"])
params.pop("sign") # 先剔除sign
# 获取待签名的字符串
unsigned_string = "&".join(["{0}={1}".format(i,params[i]) for i in sorted(params)])
print(unsigned_string)

# SHA256WithRSA + 应用私钥 对 待签名的字符串
private_key = RSA.importKey(open('file/应用私钥2048.txt').read())
signer = PKCS1_v1_5.new((private_key))
signatrue = signer.sign(SHA256.new(unsigned_string.encode('utf-8')))

# 签名之后进行base64 编码，转换为字符串
sign_string = encodebytes(signatrue).decode("utf8").replace("\n","")

# 把生成的签名赋值给sign参数，拼接到请求参数中
result = "&".join(["{0}={1}".format(k, quote_plus(params[k])) for k in sorted(params)]) # quote_plus()转成url支持的格式

result = result+"&sign="+quote_plus(sign_string)

# 网关
gateway = "https://openapi.alipaydev.com/gateway.do"
ali_pay_url = "{}?{}".format(gateway, result)
return redirect(ali_pay_url)