Django中使用geetest验证

一、geetest的使用方法

首先需要在setting中配置好文件

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)
}

配置好需要用的的文件后

我们还需要用到验证文件

geetest.py

# ！/usr/bin/env python
# -*- coding:utf-8 -*-

import sys
import random
import json
import requests
import time
from hashlib import md5

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

VERSION = "3.2.0"

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"

    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):
        """
        验证初始化预处理.
        """
        status, challenge = self._register(user_id)
        self._response_str = self._make_response_format(status, challenge)
        return status

    def _register(self, user_id=None):
        challenge = self._register_challenge(user_id)
        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):
        if not challenge:
            challenge = self._make_fail_challenge()
        string_format = json.dumps(
            {'success': success, 'gt': self.captcha_id, 'challenge': challenge})
        return string_format

    def _register_challenge(self, user_id=None):
        if user_id:
            register_url = "{api_url}{handler}?gt={captcha_ID}&user_id={user_id}".format(
                api_url=self.API_URL, handler=self.REGISTER_HANDLER, captcha_ID=self.captcha_id, user_id=user_id)
        else:
            register_url = "{api_url}{handler}?gt={captcha_ID}".format(
                api_url=self.API_URL, handler=self.REGISTER_HANDLER, captcha_ID=self.captcha_id)
        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=''):
        """
        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
        }
        backinfo = self._post_values(validate_url, query)
        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_str = validate.split('_')
        encode_ans = validate_str[0]
        encode_fbii = validate_str[1]
        encode_igi = validate_str[2]
        decode_ans = self._decode_response(challenge, encode_ans)
        decode_fbii = self._decode_response(challenge, encode_fbii)
        decode_igi = self._decode_response(challenge, encode_igi)
        validate_result = self._validate_fail_image(
            decode_ans, decode_fbii, decode_igi)
        return validate_result

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

    def _validate_fail_image(self, ans, full_bg_index, img_grp_index):
        thread = 3
        full_bg_name = str(self._md5_encode(str(full_bg_index)))[0:10]
        bg_name = str(self._md5_encode(str(img_grp_index)))[10:20]
        answer_decode = ""
        for i in range(0, 9):
            if i % 2 == 0:
                answer_decode += full_bg_name[i]
            elif i % 2 == 1:
                answer_decode += bg_name[i]
        x_decode = answer_decode[4:]
        x_int = int(x_decode, 16)
        result = x_int % 200
        if result < 40:
            result = 40
        if abs(ans - result) < thread:
            return 1
        else:
            return 0

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

    def _decode_rand_base(self, challenge):
        str_base = challenge[32:]
        i = 0
        temp_array = []
        for i in xrange(len(str_base)):
            temp_char = str_base[i]
            temp_ascii = ord(temp_char)
            result = temp_ascii - 87 if temp_ascii > 57 else temp_ascii - 48
            temp_array.append(result)
        decode_res = temp_array[0] * 36 + temp_array[1]
        return decode_res

    def _decode_response(self, challenge, userresponse):
        if len(userresponse) > 100:
            return 0
        shuzi = (1, 2, 5, 10, 50)
        chongfu = set()
        key = {}
        count = 0
        for i in challenge:
            if i in chongfu:
                continue
            else:
                value = shuzi[count % 5]
                chongfu.add(i)
                count += 1
                key.update({i: value})
        res = 0
        for i in userresponse:
            res += key.get(i, 0)
        res = res - self._decode_rand_base(challenge)
        return res

然后后编写我们的验证视图函数

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)

        return Response({"error_no": 0, "data": response_str})

用来校验验证码的方法

captcha_verify.py

from django.conf import settings
from api.utils.geetest import GeeTestLib
def verify(verify_data, uid=None, extend_params=None):
    """第三方滑动验证码校验.

    选用第三方的验证组件, 根据参数进行校验
    根据布尔值辨别是否校验通过

    Parameters
    ----------

    verify_data : dict
        请求数据

    uid: string, default: None
        用户UID, 如果存在就免受滑动验证码的限制

    extend_params : dict
        预留的扩展参数

    Returns
    -------
    True OR False
    """
    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

最后在登陆视图函数中加入判断即可完成

导入方法文件

from app01.utils.geetest import GeeTestLib
from django.conf import settings
from app01.utils.captcha_verify import verify