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flyapps/fir_ser/api/utils/geetest/geetest_lib.py

150 lines
7.7 KiB

import random
import json
import requests
import hmac
import hashlib
from .geetest_lib_result import GeetestLibResult
# sdk lib包,核心逻辑。
class GeetestLib:
IS_DEBUG = False # 调试开关,是否输出调试日志
API_URL = "http://api.geetest.com"
REGISTER_URL = "/register.php"
VALIDATE_URL = "/validate.php"
JSON_FORMAT = "1"
NEW_CAPTCHA = True
HTTP_TIMEOUT_DEFAULT = 5 # 单位:秒
VERSION = "python-flask:3.1.1"
GEETEST_CHALLENGE = "geetest_challenge" # 极验二次验证表单传参字段 chllenge
GEETEST_VALIDATE = "geetest_validate" # 极验二次验证表单传参字段 validate
GEETEST_SECCODE = "geetest_seccode" # 极验二次验证表单传参字段 seccode
def __init__(self, geetest_id, geetest_key):
self.geetest_id = geetest_id
self.geetest_key = geetest_key
self.libResult = GeetestLibResult()
def gtlog(self, message):
if self.IS_DEBUG:
print("gtlog: " + message)
# 验证初始化
def register(self, digestmod, param_dict):
self.gtlog("register(): 开始验证初始化, digestmod={0}.".format(digestmod))
origin_challenge = self.request_register(param_dict)
self.build_register_result(origin_challenge, digestmod)
self.gtlog("register(): 验证初始化, lib包返回信息={0}.".format(self.libResult))
return self.libResult
def request_register(self, param_dict):
param_dict.update({"gt": self.geetest_id, "sdk": self.VERSION, "json_format": self.JSON_FORMAT})
register_url = self.API_URL + self.REGISTER_URL
self.gtlog("requestRegister(): 验证初始化, 向极验发送请求, url={0}, params={1}.".format(register_url, param_dict))
try:
res = requests.get(register_url, params=param_dict, timeout=self.HTTP_TIMEOUT_DEFAULT)
res_body = res.text if res.status_code == requests.codes.ok else ""
self.gtlog("requestRegister(): 验证初始化, 与极验网络交互正常, 返回码={0}, 返回body={1}.".format(res.status_code, res_body))
res_dict = json.loads(res_body)
origin_challenge = res_dict["challenge"]
except Exception as e:
self.gtlog("requestRegister(): 验证初始化, 请求异常,后续流程走宕机模式, " + repr(e))
origin_challenge = ""
return origin_challenge
def local_init(self):
self.build_register_result("", "")
self.gtlog("local_init(): bypass当前状态为fail,后续流程将进入宕机模式, " + self.libResult.data)
return self.libResult
# 构建验证初始化返回数据
def build_register_result(self, origin_challenge, digestmod):
# origin_challenge为空或者值为0代表失败
if not origin_challenge or origin_challenge == "0":
# 本地随机生成32位字符串
challenge = "".join(random.sample('abcdefghijklmnopqrstuvwxyz0123456789', 32))
data = json.dumps(
{"success": 0, "gt": self.geetest_id, "challenge": challenge, "new_captcha": self.NEW_CAPTCHA})
self.libResult.set_all(0, data, "bypass当前状态为fail,后续流程走宕机模式")
else:
if digestmod == "md5":
challenge = self.md5_encode(origin_challenge + self.geetest_key)
elif digestmod == "sha256":
challenge = self.sha256_endode(origin_challenge + self.geetest_key)
elif digestmod == "hmac-sha256":
challenge = self.hmac_sha256_endode(origin_challenge, self.geetest_key)
else:
challenge = self.md5_encode(origin_challenge + self.geetest_key)
data = json.dumps(
{"success": 1, "gt": self.geetest_id, "challenge": challenge, "new_captcha": self.NEW_CAPTCHA})
self.libResult.set_all(1, data, "")
# 正常流程下(即验证初始化成功),二次验证
def successValidate(self, challenge, validate, seccode, param_dict={}):
self.gtlog(
"successValidate(): 开始二次验证 正常模式, challenge={0}, validate={1}, seccode={2}.".format(challenge, validate,
seccode))
if not self.check_param(challenge, validate, seccode):
self.libResult.set_all(0, "", "正常模式,本地校验,参数challenge、validate、seccode不可为空")
else:
response_seccode = self.requestValidate(challenge, validate, seccode, param_dict)
if not response_seccode:
self.libResult.set_all(0, "", "请求极验validate接口失败")
elif response_seccode == "false":
self.libResult.set_all(0, "", "极验二次验证不通过")
else:
self.libResult.set_all(1, "", "")
self.gtlog("successValidate(): 二次验证 正常模式, lib包返回信息={0}.".format(self.libResult))
return self.libResult
# 异常流程下(即验证初始化失败,宕机模式),二次验证
# 注意:由于是宕机模式,初衷是保证验证业务不会中断正常业务,所以此处只作简单的参数校验,可自行设计逻辑。
def failValidate(self, challenge, validate, seccode):
self.gtlog(
"failValidate(): 开始二次验证 宕机模式, challenge={0}, validate={1}, seccode={2}.".format(challenge, validate,
seccode))
if not self.check_param(challenge, validate, seccode):
self.libResult.set_all(0, "", "宕机模式,本地校验,参数challenge、validate、seccode不可为空.")
else:
self.libResult.set_all(1, "", "")
self.gtlog("failValidate(): 二次验证 宕机模式, lib包返回信息={0}.".format(self.libResult))
return self.libResult
# 向极验发送二次验证的请求,POST方式
def requestValidate(self, challenge, validate, seccode, param_dict):
param_dict.update(
{"seccode": seccode, "json_format": self.JSON_FORMAT, "challenge": challenge, "sdk": self.VERSION,
"captchaid": self.geetest_id})
validate_url = self.API_URL + self.VALIDATE_URL
self.gtlog("requestValidate(): 二次验证 正常模式, 向极验发送请求, url={0}, params={1}.".format(validate_url, param_dict))
try:
res = requests.post(validate_url, data=param_dict, timeout=self.HTTP_TIMEOUT_DEFAULT)
res_body = res.text if res.status_code == requests.codes.ok else ""
self.gtlog(
"requestValidate(): 二次验证 正常模式, 与极验网络交互正常, 返回码={0}, 返回body={1}.".format(res.status_code, res_body))
res_dict = json.loads(res_body)
seccode = res_dict["seccode"]
except Exception as e:
self.gtlog("requestValidate(): 二次验证 正常模式, 请求异常, " + repr(e))
seccode = ""
return seccode
# 校验二次验证的三个参数,校验通过返回true,校验失败返回false
def check_param(self, challenge, validate, seccode):
return not (
challenge is None or challenge.isspace() or validate is None or validate.isspace() or seccode is None or seccode.isspace())
def md5_encode(self, value):
md5 = hashlib.md5()
md5.update(value.encode("utf-8"))
return md5.hexdigest()
def sha256_endode(self, value):
sha256 = hashlib.sha256()
sha256.update(value.encode("utf-8"))
return sha256.hexdigest()
def hmac_sha256_endode(self, value, key):
return hmac.new(key.encode("utf-8"), value.encode("utf-8"), digestmod=hashlib.sha256).hexdigest()