match_spider/zbytb/utils/clean_file.py

import os
import re
import requests
import hashlib
from utils.log import logger
from urllib.parse import urlparse, unquote


# 文件文档类型
DOCTYPE = {
    'txt', 'rtf', 'dps', 'et', 'ett', 'xls',
    'xlsx', 'xlsb', 'xlsm', 'xlt', 'ods', 'pmd', 'pmdx',
    'doc', 'docm', 'docx', 'dot', 'dotm', 'dotx',
    'odt', 'wps', 'csv', 'xml', 'xps'
}
# 压缩类型
COMPRESSION_TYPE = {
    'rar', 'zip', 'gzzb', '7z', 'tar', 'gz', 'bz2', 'jar', 'iso', 'cab',
    'arj', 'lzh', 'ace', 'uue', 'edxz',
}
# 图片类型
IMAGE_TYPE = {
    'jpg', 'png', 'jpeg', 'tiff', 'gif', 'psd', 'raw', 'eps', 'svg', 'bmp',
    'pdf'
}
# 其他类型
OTHER_TYPE = {
    'swf', 'nxzf', 'xezf', 'nxcf'
}


def sha1(val):
    _sha1 = hashlib.sha1()
    if isinstance(val, bytes):
        _sha1.update(str(val).encode("utf-8"))
    elif isinstance(val, str):
        _sha1.update(val.encode("utf-8"))
    return _sha1.hexdigest()


def remove(file_path: str):
    try:
        os.remove(file_path)
    except:
        pass


def getsize(file):
    try:
        return os.path.getsize(file)
    except FileNotFoundError:
        return 0


def discern_file_format(text):

    text = text.strip()

    file_types = {
        *DOCTYPE,
        *COMPRESSION_TYPE,
        *IMAGE_TYPE,
        *OTHER_TYPE
    }
    for file_type in file_types:
        all_file_format = [file_type, file_type.upper()]
        for t in all_file_format:
            result = re.match(f'.*{t}$', text, re.S)
            if result is not None:
                return t
    else:
        unknown_type = re.findall('[^.\\/:*?"<>|\r\n]+$', text, re.S)
        logger.warning(f'[附件类型识别]未定义的文件类型{unknown_type}')
        return None


def extract_file_type(text):
    if text is None:
        return None
    return discern_file_format(text)


def extract_file_name_by_href(href: str, file_type: str):
    """从url中抽取文件名称"""
    # 中文标点符号:[\u3002\uff1b\uff0c\uff1a\u201c\u201d\uff08\uff09\u3001\uff1f\u300a\u300b]
    # 中文字符:[\u4e00 -\u9fa5]
    zh_char_pattern = '[\u3002\uff1b\uff0c\uff1a\u201c\u201d\uff08\uff09\u3001\uff1f\u300a\u300b\u4e00-\u9fa5]+'
    parser = urlparse(href)
    query = (parser.query or parser.path)
    result = re.search(f'.*\\.{file_type}', query, re.S)
    if result is not None:
        encode_str = unquote(result.group())
        name = re.search(zh_char_pattern, encode_str)
        if name is not None:
            return unquote(name.group())
    return None


def extract_file_name(text):
    file_type = discern_file_format(text)
    if file_type is not None:
        repl = '.{}'.format(file_type)
        text = text.replace(repl, '')
    return text


def verify_file_name(name):
    if extract_file_type(name) is None:
        raise ValueError


# 去除附件名空格、两个后缀
def clean_file_name(file_name:str,file_type:str):
    file_name = file_name.strip()
    if file_type in file_name:
        file_name = file_name.replace(f'.{file_type}', '')
    return file_name


# 限制附件大小：size < 5 kb 不存入数据库
def limit_file_size(file_size:str):
    if "M" in file_size or "m" in file_size:
        file_size = float("".join(re.findall('^[0-9]\d*\.\d*|[1-9]\d*',file_size))) * 1000
    else:
        file_size = "".join(re.findall('^[0-9]\d*\.\d*|[1-9]\d*', file_size))
    if float(file_size) < 5:
        return False
    else:
        return True


# 判断附件地址是否正确
def judge_file_url(file_url:str):
    file_url = file_url.strip()
    if " " in file_url:
        file_url = file_url.split(" ")[0]
    return file_url


# 需二次请求 添加附件地址参数 appUrlFlag
def add_appUrlFlag_param(file_url):
    if "appUrlFlag" in file_url and "downloadztbattach" in file_url and "attachGuid" in file_url:
        file_url = file_url.replace('downloadztbattach','ztbAttachDownloadAction.action') + "&cmd=getContent"
    return file_url



# 附件下载 需验证码
session = requests.session()

headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36"
}

# 打码接口
def get_code(file_path: str) -> dict:
    upload_address = "http://123.57.163.80:2119/v1/images/verify"
    with open(file_path, 'rb') as f:
        image_bytes = f.read()
    content = {'file': image_bytes}
    # json_resp = get_verify_code(upload_address, content)
    headers = {'accept': 'application/json'}
    response = session.post(upload_address, headers=headers, files=content, stream=True)
    return response.json()


# 识别验证码
def get_dealcode(img_url):
    res = session.get(img_url, headers=headers)
    img_path = 'image'
    if not os.path.exists(img_path):
        os.mkdir(img_path)
    with open(img_path + '/zgzbycgw.jpg', 'wb') as f:
        f.write(res.content)
    res = get_code(img_path + '/zgzbycgw.jpg')
    if res.get("msg") == "success":
        img_code = res.get("r").get("code")
    else:
        img_code = None
    return img_code


# 天津市政府采购网
# def tjzfcgw_file_yzm(file_url):
#     img_url = 'http://www.ccgp-tianjin.gov.cn/commons/image.jsp'
#     session.get(file_url, headers=headers, verify=False)
#
#     # 下载地址
#     file_url_yzm = "http://www.ccgp-tianjin.gov.cn/portal/documentView.do"
#
#     Yzm_result = get_dealcode(img_url).replace("=", "").replace("?", "")
#     if "x" in Yzm_result:
#         Yzm_result = Yzm_result.replace("x", "*")
#     try:
#         yzm = eval(Yzm_result)
#     except:
#         yzm = ""
#
#     params_yzm = {
#         "imageString": f"{yzm}",
#         "method": "downNewFiles"
#     }
#
#     file_result = session.get(file_url_yzm, headers=headers, params=params_yzm, verify=False)
#
#     req_count = 1
#     while "请输入验证码" in file_result.text:
#         if req_count >= 10:
#             break
#         Yzm_result = get_dealcode(img_url).replace("=", "").replace("?", "")
#         if "x" in Yzm_result:
#             Yzm_result = Yzm_result.replace("x", "*")
#         try:
#             yzm = eval(Yzm_result)
#         except:
#             yzm = ""
#
#         params_yzm = {
#             "imageString": f"{yzm}",
#             "method": "downNewFiles"
#         }
#
#         file_result = session.get(file_url_yzm, headers=headers, params=params_yzm, verify=False)
#         # 站点限制 访问频率 ，故休眠时间较大
#         time.sleep(random.randint(10,20))
#         req_count += 1
#
#     return file_result.content


# 判断 附件下载 是否需要 验证码
# yzm_keywords = ['method=downEnId']

# 附件下载 需要 验证码 的方法
# site_list_yzm = [tjzfcgw_file_yzm]

# 判断 附件下载 是否需要 修改 请求方式


req_keywords = ['请求类型防御']

# 附件下载 需要 修改附件地址 的方法
modify_file_url_list = [add_appUrlFlag_param]