一、geetest的使用方法
首先需要配置好需要的文件
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
与之相关联的设置在setting中
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
最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})