128 lines
4.2 KiB
Python
128 lines
4.2 KiB
Python
import ipaddress, re, signal, socket, traceback, typing
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import urllib.error, urllib.parse
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import json as _json
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import bs4, netifaces, requests
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from src import utils
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REGEX_URL = re.compile("https?://[A-Z0-9{}]+".format(re.escape("-._~:/%?#[]@!$&'()*+,;=")), re.I)
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USER_AGENT = ("Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 "
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"(KHTML, like Gecko) Chrome/49.0.2623.87 Safari/537.36")
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RESPONSE_MAX = (1024*1024)*100
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SOUP_CONTENT_TYPES = ["text/html", "text/xml", "application/xml"]
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class HTTPException(Exception):
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pass
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class HTTPTimeoutException(HTTPException):
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def __init__(self):
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Exception.__init__(self, "HTTP request timed out")
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class HTTPParsingException(HTTPException):
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def __init__(self, message: str=None):
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Exception.__init__(self, message or "HTTP parsing failed")
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class HTTPWrongContentTypeException(HTTPException):
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def __init__(self, message: str=None):
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Exception.__init__(self,
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message or "HTTP request gave wrong content type")
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def throw_timeout():
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raise HTTPTimeoutException()
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class Response(object):
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def __init__(self, code: int, data: typing.Any,
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headers: typing.Dict[str, str]):
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self.code = code
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self.data = data
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self.headers = headers
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def request(url: str, method: str="GET", get_params: dict={},
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post_data: typing.Any=None, headers: dict={},
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json_data: typing.Any=None, code: bool=False, json: bool=False,
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soup: bool=False, parser: str="lxml", fallback_encoding: str="utf8",
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allow_redirects: bool=True
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) -> Response:
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if not urllib.parse.urlparse(url).scheme:
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url = "http://%s" % url
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if not "Accept-Language" in headers:
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headers["Accept-Language"] = "en-GB"
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if not "User-Agent" in headers:
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headers["User-Agent"] = USER_AGENT
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signal.signal(signal.SIGALRM, lambda _1, _2: throw_timeout())
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signal.alarm(5)
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try:
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response = requests.request(
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method.upper(),
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url,
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headers=headers,
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params=get_params,
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data=post_data,
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json=json_data,
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allow_redirects=allow_redirects,
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stream=True
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)
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response_content = response.raw.read(RESPONSE_MAX, decode_content=True)
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except TimeoutError:
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raise HTTPTimeoutException()
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finally:
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signal.signal(signal.SIGALRM, signal.SIG_IGN)
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response_headers = utils.CaseInsensitiveDict(dict(response.headers))
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content_type = response.headers["Content-Type"].split(";", 1)[0]
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def _decode_data():
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return response_content.decode(response.encoding or fallback_encoding)
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if soup:
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if content_type in SOUP_CONTENT_TYPES:
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soup = bs4.BeautifulSoup(_decode_data(), parser)
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return Response(response.status_code, soup, response_headers)
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else:
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raise HTTPWrongContentTypeException(
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"Tried to soup non-html/non-xml data")
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data = _decode_data()
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if json and data:
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try:
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return Response(response.status_code, _json.loads(data),
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response_headers)
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except _json.decoder.JSONDecodeError as e:
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raise HTTPParsingException(str(e))
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return Response(response.status_code, data, response_headers)
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def strip_html(s: str) -> str:
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return bs4.BeautifulSoup(s, "lxml").get_text()
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def resolve_hostname(hostname: str) -> typing.List[str]:
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try:
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addresses = socket.getaddrinfo(hostname, None, 0, socket.SOCK_STREAM)
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except:
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return []
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return [address[-1][0] for address in addresses]
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def is_ip(addr: str) -> bool:
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try:
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ipaddress.ip_address(addr)
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except ValueError:
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return False
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return True
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def is_localhost(hostname: str) -> bool:
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if is_ip(hostname):
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ips = [ipaddress.ip_address(hostname)]
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else:
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ips = [ipaddress.ip_address(ip) for ip in resolve_hostname(hostname)]
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for interface in netifaces.interfaces():
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links = netifaces.ifaddresses(interface)
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for link in links.get(netifaces.AF_INET, []
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)+links.get(netifaces.AF_INET6, []):
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address = ipaddress.ip_address(link["addr"].split("%", 1)[0])
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if address in ips:
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return True
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return False
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