mirror of
https://github.com/ArchiveBox/ArchiveBox
synced 2024-11-10 14:44:18 +00:00
324 lines
10 KiB
Python
324 lines
10 KiB
Python
__package__ = 'archivebox'
|
|
|
|
import re
|
|
import requests
|
|
import json as pyjson
|
|
|
|
from typing import List, Optional, Any
|
|
from pathlib import Path
|
|
from inspect import signature
|
|
from functools import wraps
|
|
from hashlib import sha256
|
|
from urllib.parse import urlparse, quote, unquote
|
|
from html import escape, unescape
|
|
from datetime import datetime
|
|
from dateparser import parse as dateparser
|
|
from requests.exceptions import RequestException, ReadTimeout
|
|
|
|
from .vendor.base32_crockford import encode as base32_encode # type: ignore
|
|
from w3lib.encoding import html_body_declared_encoding, http_content_type_encoding
|
|
|
|
try:
|
|
import chardet
|
|
detect_encoding = lambda rawdata: chardet.detect(rawdata)["encoding"]
|
|
except ImportError:
|
|
detect_encoding = lambda rawdata: "utf-8"
|
|
|
|
### Parsing Helpers
|
|
|
|
# All of these are (str) -> str
|
|
# shortcuts to: https://docs.python.org/3/library/urllib.parse.html#url-parsing
|
|
scheme = lambda url: urlparse(url).scheme.lower()
|
|
without_scheme = lambda url: urlparse(url)._replace(scheme='').geturl().strip('//')
|
|
without_query = lambda url: urlparse(url)._replace(query='').geturl().strip('//')
|
|
without_fragment = lambda url: urlparse(url)._replace(fragment='').geturl().strip('//')
|
|
without_path = lambda url: urlparse(url)._replace(path='', fragment='', query='').geturl().strip('//')
|
|
path = lambda url: urlparse(url).path
|
|
basename = lambda url: urlparse(url).path.rsplit('/', 1)[-1]
|
|
domain = lambda url: urlparse(url).netloc
|
|
query = lambda url: urlparse(url).query
|
|
fragment = lambda url: urlparse(url).fragment
|
|
extension = lambda url: basename(url).rsplit('.', 1)[-1].lower() if '.' in basename(url) else ''
|
|
base_url = lambda url: without_scheme(url) # uniq base url used to dedupe links
|
|
|
|
without_www = lambda url: url.replace('://www.', '://', 1)
|
|
without_trailing_slash = lambda url: url[:-1] if url[-1] == '/' else url.replace('/?', '?')
|
|
hashurl = lambda url: base32_encode(int(sha256(base_url(url).encode('utf-8')).hexdigest(), 16))[:20]
|
|
|
|
urlencode = lambda s: s and quote(s, encoding='utf-8', errors='replace')
|
|
urldecode = lambda s: s and unquote(s)
|
|
htmlencode = lambda s: s and escape(s, quote=True)
|
|
htmldecode = lambda s: s and unescape(s)
|
|
|
|
short_ts = lambda ts: str(parse_date(ts).timestamp()).split('.')[0]
|
|
ts_to_date = lambda ts: ts and parse_date(ts).strftime('%Y-%m-%d %H:%M')
|
|
ts_to_iso = lambda ts: ts and parse_date(ts).isoformat()
|
|
|
|
|
|
URL_REGEX = re.compile(
|
|
r'http[s]?://' # start matching from allowed schemes
|
|
r'(?:[a-zA-Z]|[0-9]' # followed by allowed alphanum characters
|
|
r'|[$-_@.&+]|[!*\(\),]' # or allowed symbols
|
|
r'|(?:%[0-9a-fA-F][0-9a-fA-F]))' # or allowed unicode bytes
|
|
r'[^\]\[\(\)<>"\'\s]+', # stop parsing at these symbols
|
|
re.IGNORECASE,
|
|
)
|
|
|
|
COLOR_REGEX = re.compile(r'\[(?P<arg_1>\d+)(;(?P<arg_2>\d+)(;(?P<arg_3>\d+))?)?m')
|
|
|
|
def is_static_file(url: str):
|
|
# TODO: the proper way is with MIME type detection + ext, not only extension
|
|
from .config import STATICFILE_EXTENSIONS
|
|
return extension(url).lower() in STATICFILE_EXTENSIONS
|
|
|
|
|
|
def enforce_types(func):
|
|
"""
|
|
Enforce function arg and kwarg types at runtime using its python3 type hints
|
|
"""
|
|
# TODO: check return type as well
|
|
|
|
@wraps(func)
|
|
def typechecked_function(*args, **kwargs):
|
|
sig = signature(func)
|
|
|
|
def check_argument_type(arg_key, arg_val):
|
|
try:
|
|
annotation = sig.parameters[arg_key].annotation
|
|
except KeyError:
|
|
annotation = None
|
|
|
|
if annotation is not None and annotation.__class__ is type:
|
|
if not isinstance(arg_val, annotation):
|
|
raise TypeError(
|
|
'{}(..., {}: {}) got unexpected {} argument {}={}'.format(
|
|
func.__name__,
|
|
arg_key,
|
|
annotation.__name__,
|
|
type(arg_val).__name__,
|
|
arg_key,
|
|
str(arg_val)[:64],
|
|
)
|
|
)
|
|
|
|
# check args
|
|
for arg_val, arg_key in zip(args, sig.parameters):
|
|
check_argument_type(arg_key, arg_val)
|
|
|
|
# check kwargs
|
|
for arg_key, arg_val in kwargs.items():
|
|
check_argument_type(arg_key, arg_val)
|
|
|
|
return func(*args, **kwargs)
|
|
|
|
return typechecked_function
|
|
|
|
|
|
def docstring(text: Optional[str]):
|
|
"""attach the given docstring to the decorated function"""
|
|
def decorator(func):
|
|
if text:
|
|
func.__doc__ = text
|
|
return func
|
|
return decorator
|
|
|
|
|
|
@enforce_types
|
|
def str_between(string: str, start: str, end: str=None) -> str:
|
|
"""(<abc>12345</def>, <abc>, </def>) -> 12345"""
|
|
|
|
content = string.split(start, 1)[-1]
|
|
if end is not None:
|
|
content = content.rsplit(end, 1)[0]
|
|
|
|
return content
|
|
|
|
|
|
@enforce_types
|
|
def parse_date(date: Any) -> Optional[datetime]:
|
|
"""Parse unix timestamps, iso format, and human-readable strings"""
|
|
|
|
if date is None:
|
|
return None
|
|
|
|
if isinstance(date, datetime):
|
|
return date
|
|
|
|
if isinstance(date, (float, int)):
|
|
date = str(date)
|
|
|
|
if isinstance(date, str):
|
|
return dateparser(date)
|
|
|
|
raise ValueError('Tried to parse invalid date! {}'.format(date))
|
|
|
|
|
|
@enforce_types
|
|
def download_url(url: str, timeout: int=None) -> str:
|
|
"""Download the contents of a remote url and return the text"""
|
|
from .config import TIMEOUT, CHECK_SSL_VALIDITY, WGET_USER_AGENT
|
|
timeout = timeout or TIMEOUT
|
|
response = requests.get(
|
|
url,
|
|
headers={'User-Agent': WGET_USER_AGENT},
|
|
verify=CHECK_SSL_VALIDITY,
|
|
timeout=timeout,
|
|
)
|
|
|
|
content_type = response.headers.get('Content-Type', '')
|
|
encoding = http_content_type_encoding(content_type) or html_body_declared_encoding(response.text)
|
|
|
|
if encoding is not None:
|
|
response.encoding = encoding
|
|
|
|
return response.text
|
|
|
|
@enforce_types
|
|
def get_headers(url: str, timeout: int=None) -> str:
|
|
"""Download the contents of a remote url and return the headers"""
|
|
from .config import TIMEOUT, CHECK_SSL_VALIDITY, WGET_USER_AGENT
|
|
timeout = timeout or TIMEOUT
|
|
|
|
try:
|
|
response = requests.head(
|
|
url,
|
|
headers={'User-Agent': WGET_USER_AGENT},
|
|
verify=CHECK_SSL_VALIDITY,
|
|
timeout=timeout,
|
|
allow_redirects=True,
|
|
)
|
|
if response.status_code >= 400:
|
|
raise RequestException
|
|
except ReadTimeout:
|
|
raise
|
|
except RequestException:
|
|
response = requests.get(
|
|
url,
|
|
headers={'User-Agent': WGET_USER_AGENT},
|
|
verify=CHECK_SSL_VALIDITY,
|
|
timeout=timeout,
|
|
stream=True
|
|
)
|
|
|
|
return pyjson.dumps(
|
|
{
|
|
'Status-Code': response.status_code,
|
|
**dict(response.headers),
|
|
},
|
|
indent=4,
|
|
)
|
|
|
|
|
|
@enforce_types
|
|
def chrome_args(**options) -> List[str]:
|
|
"""helper to build up a chrome shell command with arguments"""
|
|
|
|
from .config import CHROME_OPTIONS
|
|
|
|
options = {**CHROME_OPTIONS, **options}
|
|
|
|
cmd_args = [options['CHROME_BINARY']]
|
|
|
|
if options['CHROME_HEADLESS']:
|
|
cmd_args += ('--headless',)
|
|
|
|
if not options['CHROME_SANDBOX']:
|
|
# assume this means we are running inside a docker container
|
|
# in docker, GPU support is limited, sandboxing is unecessary,
|
|
# and SHM is limited to 64MB by default (which is too low to be usable).
|
|
cmd_args += (
|
|
'--no-sandbox',
|
|
'--disable-gpu',
|
|
'--disable-dev-shm-usage',
|
|
'--disable-software-rasterizer',
|
|
)
|
|
|
|
|
|
if not options['CHECK_SSL_VALIDITY']:
|
|
cmd_args += ('--disable-web-security', '--ignore-certificate-errors')
|
|
|
|
if options['CHROME_USER_AGENT']:
|
|
cmd_args += ('--user-agent={}'.format(options['CHROME_USER_AGENT']),)
|
|
|
|
if options['RESOLUTION']:
|
|
cmd_args += ('--window-size={}'.format(options['RESOLUTION']),)
|
|
|
|
if options['TIMEOUT']:
|
|
cmd_args += ('--timeout={}'.format((options['TIMEOUT']) * 1000),)
|
|
|
|
if options['CHROME_USER_DATA_DIR']:
|
|
cmd_args.append('--user-data-dir={}'.format(options['CHROME_USER_DATA_DIR']))
|
|
|
|
return cmd_args
|
|
|
|
|
|
def ansi_to_html(text):
|
|
"""
|
|
Based on: https://stackoverflow.com/questions/19212665/python-converting-ansi-color-codes-to-html
|
|
"""
|
|
from .config import COLOR_DICT
|
|
|
|
TEMPLATE = '<span style="color: rgb{}"><br>'
|
|
text = text.replace('[m', '</span>')
|
|
|
|
def single_sub(match):
|
|
argsdict = match.groupdict()
|
|
if argsdict['arg_3'] is None:
|
|
if argsdict['arg_2'] is None:
|
|
_, color = 0, argsdict['arg_1']
|
|
else:
|
|
_, color = argsdict['arg_1'], argsdict['arg_2']
|
|
else:
|
|
_, color = argsdict['arg_3'], argsdict['arg_2']
|
|
|
|
return TEMPLATE.format(COLOR_DICT[color][0])
|
|
|
|
return COLOR_REGEX.sub(single_sub, text)
|
|
|
|
|
|
class AttributeDict(dict):
|
|
"""Helper to allow accessing dict values via Example.key or Example['key']"""
|
|
|
|
def __init__(self, *args, **kwargs):
|
|
super().__init__(*args, **kwargs)
|
|
# Recursively convert nested dicts to AttributeDicts (optional):
|
|
# for key, val in self.items():
|
|
# if isinstance(val, dict) and type(val) is not AttributeDict:
|
|
# self[key] = AttributeDict(val)
|
|
|
|
def __getattr__(self, attr: str) -> Any:
|
|
return dict.__getitem__(self, attr)
|
|
|
|
def __setattr__(self, attr: str, value: Any) -> None:
|
|
return dict.__setitem__(self, attr, value)
|
|
|
|
|
|
class ExtendedEncoder(pyjson.JSONEncoder):
|
|
"""
|
|
Extended json serializer that supports serializing several model
|
|
fields and objects
|
|
"""
|
|
|
|
def default(self, obj):
|
|
cls_name = obj.__class__.__name__
|
|
|
|
if hasattr(obj, '_asdict'):
|
|
return obj._asdict()
|
|
|
|
elif isinstance(obj, bytes):
|
|
return obj.decode()
|
|
|
|
elif isinstance(obj, datetime):
|
|
return obj.isoformat()
|
|
|
|
elif isinstance(obj, Exception):
|
|
return '{}: {}'.format(obj.__class__.__name__, obj)
|
|
|
|
elif isinstance(obj, Path):
|
|
return str(obj)
|
|
|
|
elif cls_name in ('dict_items', 'dict_keys', 'dict_values'):
|
|
return tuple(obj)
|
|
|
|
return pyjson.JSONEncoder.default(self, obj)
|
|
|