极验geetest滑动验证后端

```官方下载```

1. geetest.py 官方文件
from shop.utils.geetest import GeetestLib
2. captcha.py 视图文件
from shop.views.captcha import CaptchaView
3. captcha_verify.py 验证文件

```urls.py文件```

from shop.views.captcha import CaptchaView
urlpatterns = [
    #  jiyan验证
    re_path('captcha_check/', CaptchaView.as_view()),
]

```settings.py文件```

GEE_TEST = {
    "gee_test_access_id": "37ca5631edd1e882721808d35163b3ad",
    "gee_test_access_key": "7eb11ccf3e0953bdd060ed8b60b0c4f5",
    "verify_status": True,  # 是否启用滑动验证码验证组件(True表示启用)
    "not_verify": [
        "2ba6b08d53a4fd27057a32537e2d55ae",
    ],  # 不用验证的用户(存放着用户的uid)
}

```captcha.py视图文件```

# Python Library
import json
# Third-party Library
from rest_framework.views import APIView
from rest_framework.response import Response
# JiYan
from shop.utils.geetest import GeetestLib
from django.conf import settings


class CaptchaView(APIView):
    def get(self, request):
        gt = GeetestLib(settings.GEE_TEST["gee_test_access_id"], settings.GEE_TEST["gee_test_access_key"])
        gt.pre_process()
        # 设置 geetest session, 用于是否启用滑动验证码向 geetest 发起远程验证, 如果取不到的话只是对本地轨迹进行校验
        # self.request.session[gt.GT_STATUS_SESSION_KEY] = status
        # request.session["user_id"] = user_id
        response_str = gt.get_response_str()
        response_str = json.loads(response_str)
        """
        response_str结果如下：
        {
            "success": 1,
            "gt": "37ca5631edd1e882721808d35163b3ad",
            "challenge": "2df4904f10c0a3f07fc5b60a429d5ef5"
        }
        """
        return Response({"error_no": 0, "data": response_str})

    """
    构建前段需要的格式：
    {
        "error_no": 0,
        "data": {
            "success": 1,
            "gt": "37ca5631edd1e882721808d35163b3ad",
            "challenge": "2df4904f10c0a3f07fc5b60a429d5ef5"
        }
    }
    """

```captcha_verify.py视图文件```
# 这个文件是官网方法演变

from django.conf import settings
from shop.utils.geetest import GeetestLib


def verify(verify_data, uid=None, extend_params=None):
    captcha_config = settings.GEE_TEST
    if captcha_config.get("verify_status"):
        status = True
        if uid in captcha_config.get("not_verify"):
            return True
        gt = GeetestLib(captcha_config["gee_test_access_id"], captcha_config["gee_test_access_key"])
        challenge = verify_data.get(gt.FN_CHALLENGE, '')
        validate = verify_data.get(gt.FN_VALIDATE, '')
        seccode = verify_data.get(gt.FN_SECCODE, '')
        # status = request.session.get(gt.GT_STATUS_SESSION_KEY, 1)
        # user_id = request.session.get("user_id")

        if status:
            result = gt.success_validate(challenge, validate, seccode, None)
        else:
            result = gt.failback_validate(challenge, validate, seccode)
        return True if result else False
    else:
        return True

```geetest.py视图文件```
# 这个文件不用自己写，官网下载就可以
# 下载地址：https://docs.geetest.com/install/deploy/server/python

# Python Library
import sys, random, json, requests, time
# Third-party Library
from hashlib import md5

if sys.version_info >= (3,):
    xrange = range

VERSION = "3.0.0"

class GeetestLib(object):
    FN_CHALLENGE = "geetest_challenge"
    FN_VALIDATE = "geetest_validate"
    FN_SECCODE = "geetest_seccode"

    GT_STATUS_SESSION_KEY = "gt_server_status"

    API_URL = "http://api.geetest.com"
    REGISTER_HANDLER = "/register.php"
    VALIDATE_HANDLER = "/validate.php"
    JSON_FORMAT = False

    def __init__(self, captcha_id, private_key):
        self.private_key = private_key
        self.captcha_id = captcha_id
        self.sdk_version = VERSION
        self._response_str = ""

    def pre_process(self, user_id=None, new_captcha=1, JSON_FORMAT=1, client_type="web", ip_address=""):
        """
        验证初始化预处理.
        //TO DO  arrage the parameter
        """
        status, challenge = self._register(user_id, new_captcha, JSON_FORMAT, client_type, ip_address)
        self._response_str = self._make_response_format(status, challenge, new_captcha)
        return status

    def _register(self, user_id=None, new_captcha=1, JSON_FORMAT=1, client_type="web", ip_address=""):
        pri_responce = self._register_challenge(user_id, new_captcha, JSON_FORMAT, client_type, ip_address)
        if pri_responce:
            if JSON_FORMAT == 1:
                response_dic = json.loads(pri_responce)
                challenge = response_dic["challenge"]
            else:
                challenge = pri_responce
        else:
            challenge = " "
        if len(challenge) == 32:
            challenge = self._md5_encode("".join([challenge, self.private_key]))
            return 1, challenge
        else:
            return 0, self._make_fail_challenge()

    def get_response_str(self):
        return self._response_str

    def _make_fail_challenge(self):
        rnd1 = random.randint(0, 99)
        rnd2 = random.randint(0, 99)
        md5_str1 = self._md5_encode(str(rnd1))
        md5_str2 = self._md5_encode(str(rnd2))
        challenge = md5_str1 + md5_str2[0:2]
        return challenge

    def _make_response_format(self, success=1, challenge=None, new_captcha=1):
        if not challenge:
            challenge = self._make_fail_challenge()
        if new_captcha:
            string_format = json.dumps(
                {'success': success, 'gt': self.captcha_id, 'challenge': challenge, "new_captcha": True})
        else:
            string_format = json.dumps(
                {'success': success, 'gt': self.captcha_id, 'challenge': challenge, "new_captcha": False})
        return string_format

    def _register_challenge(self, user_id=None, new_captcha=1, JSON_FORMAT=1, client_type="web", ip_address=""):
        if user_id:
            register_url = "{api_url}{handler}?gt={captcha_ID}&user_id={user_id}&json_format={JSON_FORMAT}&client_type={client_type}&ip_address={ip_address}".format(
                api_url=self.API_URL, handler=self.REGISTER_HANDLER, captcha_ID=self.captcha_id, user_id=user_id,
                new_captcha=new_captcha, JSON_FORMAT=JSON_FORMAT, client_type=client_type, ip_address=ip_address)
        else:
            register_url = "{api_url}{handler}?gt={captcha_ID}&json_format={JSON_FORMAT}&client_type={client_type}&ip_address={ip_address}".format(
                api_url=self.API_URL, handler=self.REGISTER_HANDLER, captcha_ID=self.captcha_id,
                new_captcha=new_captcha, JSON_FORMAT=JSON_FORMAT, client_type=client_type, ip_address=ip_address)
        try:
            response = requests.get(register_url, timeout=2)
            if response.status_code == requests.codes.ok:
                res_string = response.text
            else:
                res_string = ""
        except:
            res_string = ""
        return res_string

    def success_validate(self, challenge, validate, seccode, user_id=None, gt=None, data='', userinfo='',
                         JSON_FORMAT=1):
        """
        正常模式的二次验证方式.向geetest server 请求验证结果.
        """
        if not self._check_para(challenge, validate, seccode):
            return 0
        if not self._check_result(challenge, validate):
            return 0
        validate_url = "{api_url}{handler}".format(
            api_url=self.API_URL, handler=self.VALIDATE_HANDLER)
        query = {
            "seccode": seccode,
            "sdk": ''.join(["python_", self.sdk_version]),
            "user_id": user_id,
            "data": data,
            "timestamp": time.time(),
            "challenge": challenge,
            "userinfo": userinfo,
            "captchaid": gt,
            "json_format": JSON_FORMAT
        }
        backinfo = self._post_values(validate_url, query)
        if JSON_FORMAT == 1:
            backinfo = json.loads(backinfo)
            backinfo = backinfo["seccode"]
        if backinfo == self._md5_encode(seccode):
            return 1
        else:
            return 0

    def _post_values(self, apiserver, data):
        response = requests.post(apiserver, data)
        return response.text

    def _check_result(self, origin, validate):
        encodeStr = self._md5_encode(self.private_key + "geetest" + origin)
        if validate == encodeStr:
            return True
        else:
            return False

    def failback_validate(self, challenge, validate, seccode):
        """
        failback模式的二次验证方式.在本地对轨迹进行简单的判断返回验证结果.
        """
        if not self._check_para(challenge, validate, seccode):
            return 0
        validate_result = self._failback_check_result(
            challenge, validate, )
        return validate_result

    def _failback_check_result(self, challenge, validate):
        encodeStr = self._md5_encode(challenge)
        if validate == encodeStr:
            return True
        else:
            return False

    def _check_para(self, challenge, validate, seccode):
        return (bool(challenge.strip()) and bool(validate.strip()) and bool(seccode.strip()))

    def _md5_encode(self, values):
        if type(values) == str:
            values = values.encode()
        m = md5(values)
        return m.hexdigest()