298 lines
8.9 KiB
Python
298 lines
8.9 KiB
Python
# -*- coding: iso-8859-1 -*-
|
|
# Copyright (C) 2004-2005 Tristan Seligmann and Jonathan Jacobs
|
|
# Copyright (C) 2012 Bastian Kleineidam
|
|
from __future__ import division
|
|
|
|
import urllib2, urlparse
|
|
import sys
|
|
import os
|
|
import cgi
|
|
import re
|
|
import traceback
|
|
import time
|
|
from htmlentitydefs import name2codepoint
|
|
from math import log, floor
|
|
|
|
from .output import out
|
|
from .configuration import UserAgent, AppName, App, SupportUrl
|
|
from .fileutil import has_module, is_tty
|
|
if os.name == 'nt':
|
|
from . import colorama
|
|
|
|
has_curses = has_module("curses")
|
|
|
|
MAX_FILESIZE = 1024*1024*1 # 1MB
|
|
|
|
def tagre(tag, attribute, value):
|
|
"""Return a regular expression matching the given HTML tag, attribute
|
|
and value. It matches the tag and attribute names case insensitive,
|
|
and skips arbitrary whitespace and leading HTML attributes. The "<>" at
|
|
the start and end of the HTML tag is also matched.
|
|
@param tag: the tag name
|
|
@ptype tag: string
|
|
@param attribute: the attribute name
|
|
@ptype attribute: string
|
|
@param value: the attribute value
|
|
@ptype value: string
|
|
@return: the generated regular expression suitable for re.compile()
|
|
@rtype: string
|
|
"""
|
|
attrs = dict(
|
|
tag=case_insensitive_re(tag),
|
|
attribute=case_insensitive_re(attribute),
|
|
value=value,
|
|
)
|
|
return r'<\s*%(tag)s[^>]*\s+%(attribute)s\s*=\s*"%(value)s"[^>]*/?>' % attrs
|
|
|
|
|
|
def case_insensitive_re(name):
|
|
"""Reformat the given name to a case insensitive regular expression string
|
|
without using re.IGNORECASE. This way selective strings can be made case
|
|
insensitive.
|
|
@param name: the name to make case insensitive
|
|
@ptype name: string
|
|
@return: the case insenstive regex
|
|
@rtype: string
|
|
"""
|
|
return "".join("[%s%s]" % (c.lower(), c.upper()) for c in name)
|
|
|
|
|
|
baseSearch = re.compile(tagre("base", "href", '([^"]*)'))
|
|
|
|
def getPageContent(url):
|
|
# read page data
|
|
page = urlopen(url)
|
|
data = page.read(MAX_FILESIZE)
|
|
# determine base URL
|
|
baseUrl = None
|
|
match = baseSearch.search(data)
|
|
if match:
|
|
baseUrl = match.group(1)
|
|
else:
|
|
baseUrl = url
|
|
return data, baseUrl
|
|
|
|
|
|
def fetchUrl(url, searchRo):
|
|
data, baseUrl = getPageContent(url)
|
|
match = searchRo.search(data)
|
|
if match:
|
|
searchUrl = match.group(1)
|
|
out.write('matched URL %r' % searchUrl, 2)
|
|
return urlparse.urljoin(baseUrl, searchUrl)
|
|
return None
|
|
|
|
|
|
def fetchUrls(url, imageSearch, prevSearch=None):
|
|
data, baseUrl = getPageContent(url)
|
|
# match images
|
|
imageUrls = set()
|
|
for match in imageSearch.finditer(data):
|
|
imageUrl = match.group(1)
|
|
out.write('matched image URL %r' % imageUrl, 2)
|
|
imageUrls.add(urlparse.urljoin(baseUrl, imageUrl))
|
|
if not imageUrls:
|
|
raise ValueError("No images found at %s with pattern %s" % (url, imageSearch.pattern))
|
|
if prevSearch is not None:
|
|
# match previous URL
|
|
match = prevSearch.search(data)
|
|
if match:
|
|
prevUrl = match.group(1)
|
|
out.write('matched previous URL %r' % prevUrl, 2)
|
|
prevUrl = urlparse.urljoin(baseUrl, prevUrl)
|
|
else:
|
|
prevUrl = None
|
|
return imageUrls, prevUrl
|
|
return imageUrls
|
|
|
|
|
|
def _unescape(text):
|
|
"""
|
|
Replace HTML entities and character references.
|
|
"""
|
|
def _fixup(m):
|
|
text = m.group(0)
|
|
if text[:2] == "&#":
|
|
# character reference
|
|
try:
|
|
if text[:3] == "&#x":
|
|
text = unichr(int(text[3:-1], 16))
|
|
else:
|
|
text = unichr(int(text[2:-1]))
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
# named entity
|
|
try:
|
|
text = unichr(name2codepoint[text[1:-1]])
|
|
except KeyError:
|
|
pass
|
|
if isinstance(text, unicode):
|
|
text = text.encode('utf-8')
|
|
text = urllib2.quote(text, safe=';/?:@&=+$,')
|
|
return text
|
|
return re.sub("&#?\w+;", _fixup, text)
|
|
|
|
def normaliseURL(url):
|
|
"""
|
|
Removes any leading empty segments to avoid breaking urllib2; also replaces
|
|
HTML entities and character references.
|
|
"""
|
|
# XXX: brutal hack
|
|
url = _unescape(url)
|
|
url = url.replace(' ', '%20')
|
|
|
|
pu = list(urlparse.urlparse(url))
|
|
segments = pu[2].replace(' ', '%20').split('/')
|
|
while segments and segments[0] == '':
|
|
del segments[0]
|
|
pu[2] = '/' + '/'.join(segments)
|
|
return urlparse.urlunparse(pu)
|
|
|
|
def urlopen(url, referrer=None, retries=5, retry_wait_seconds=10):
|
|
assert retries >= 0, 'invalid retry value %r' % retries
|
|
assert retry_wait_seconds > 0, 'invalid retry seconds value %r' % retry_wait_seconds
|
|
# Work around urllib2 brokenness
|
|
url = normaliseURL(url)
|
|
req = urllib2.Request(url)
|
|
if referrer:
|
|
req.add_header('Referer', referrer)
|
|
req.add_header('User-Agent', UserAgent)
|
|
tries = 0
|
|
while True:
|
|
try:
|
|
return urllib2.urlopen(req)
|
|
except IOError:
|
|
out.write('URL retrieval failed; waiting %d seconds and retrying (%d)' % (retry_wait_seconds, tries), 2)
|
|
time.sleep(retry_wait_seconds)
|
|
tries += 1
|
|
if tries >= retries:
|
|
raise
|
|
|
|
|
|
def get_columns (fp):
|
|
"""Return number of columns for given file."""
|
|
if not is_tty(fp):
|
|
return 80
|
|
if os.name == 'nt':
|
|
return colorama.get_console_size().X
|
|
if has_curses:
|
|
import curses
|
|
try:
|
|
curses.setupterm(os.environ.get("TERM"), fp.fileno())
|
|
return curses.tigetnum("cols")
|
|
except curses.error:
|
|
pass
|
|
return 80
|
|
|
|
|
|
suffixes = ('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB')
|
|
|
|
def saneDataSize(size):
|
|
if size == 0:
|
|
return 'unk B'
|
|
index = int(floor(log(abs(size), 1024)))
|
|
index = min(index, len(suffixes) - 1)
|
|
index = max(index, 0)
|
|
factor = 1024 ** index
|
|
return '%0.3f %s' % (float(size) / factor, suffixes[index])
|
|
|
|
def splitpath(path):
|
|
c = []
|
|
head, tail = os.path.split(path)
|
|
while tail:
|
|
c.insert(0, tail)
|
|
head, tail = os.path.split(head)
|
|
return c
|
|
|
|
def getRelativePath(basepath, path):
|
|
basepath = splitpath(os.path.abspath(basepath))
|
|
path = splitpath(os.path.abspath(path))
|
|
|
|
afterCommon = False
|
|
for c in basepath:
|
|
if afterCommon or path[0] != c:
|
|
path.insert(0, os.path.pardir)
|
|
afterCommon = True
|
|
else:
|
|
del path[0]
|
|
|
|
return os.path.join(*path)
|
|
|
|
def getQueryParams(url):
|
|
query = urlparse.urlsplit(url)[3]
|
|
out.write('Extracting query parameters from %r (%r)...' % (url, query), 3)
|
|
return cgi.parse_qs(query)
|
|
|
|
|
|
def internal_error(out=sys.stderr, etype=None, evalue=None, tb=None):
|
|
"""Print internal error message (output defaults to stderr)."""
|
|
print >> out, os.linesep
|
|
print >> out, """********** Oops, I did it again. *************
|
|
|
|
You have found an internal error in %(app)s. Please write a bug report
|
|
at %(url)s and include the following information:
|
|
- your commandline arguments and any configuration file in ~/.dosage/
|
|
- the system information below
|
|
|
|
Not disclosing some of the information above due to privacy reasons is ok.
|
|
I will try to help you nonetheless, but you have to give me something
|
|
I can work with ;) .
|
|
""" % dict(app=AppName, url=SupportUrl)
|
|
if etype is None:
|
|
etype = sys.exc_info()[0]
|
|
if evalue is None:
|
|
evalue = sys.exc_info()[1]
|
|
print >> out, etype, evalue
|
|
if tb is None:
|
|
tb = sys.exc_info()[2]
|
|
traceback.print_exception(etype, evalue, tb, None, out)
|
|
print_app_info(out=out)
|
|
print_proxy_info(out=out)
|
|
print_locale_info(out=out)
|
|
print >> out, os.linesep, \
|
|
"******** %s internal error, over and out ********" % AppName
|
|
|
|
|
|
def print_env_info(key, out=sys.stderr):
|
|
"""If given environment key is defined, print it out."""
|
|
value = os.getenv(key)
|
|
if value is not None:
|
|
print >> out, key, "=", repr(value)
|
|
|
|
|
|
def print_proxy_info(out=sys.stderr):
|
|
"""Print proxy info."""
|
|
print_env_info("http_proxy", out=out)
|
|
|
|
|
|
def print_locale_info(out=sys.stderr):
|
|
"""Print locale info."""
|
|
for key in ("LANGUAGE", "LC_ALL", "LC_CTYPE", "LANG"):
|
|
print_env_info(key, out=out)
|
|
|
|
|
|
def print_app_info(out=sys.stderr):
|
|
"""Print system and application info (output defaults to stderr)."""
|
|
print >> out, "System info:"
|
|
print >> out, App
|
|
print >> out, "Python %(version)s on %(platform)s" % \
|
|
{"version": sys.version, "platform": sys.platform}
|
|
stime = strtime(time.time())
|
|
print >> out, "Local time:", stime
|
|
|
|
|
|
def strtime(t):
|
|
"""Return ISO 8601 formatted time."""
|
|
return time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(t)) + \
|
|
strtimezone()
|
|
|
|
|
|
def strtimezone():
|
|
"""Return timezone info, %z on some platforms, but not supported on all.
|
|
"""
|
|
if time.daylight:
|
|
zone = time.altzone
|
|
else:
|
|
zone = time.timezone
|
|
return "%+04d" % (-zone//3600)
|