234 lines
6.2 KiB
Python
234 lines
6.2 KiB
Python
import cStringIO
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import csv
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import os
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import re
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from babel.dates import format_date
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from codecs import getincrementalencoder
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from HTMLParser import HTMLParser
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from random import choice
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from searx.version import VERSION_STRING
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from searx import settings
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from searx import logger
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logger = logger.getChild('utils')
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ua_versions = ('40.0',
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'41.0',
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'42.0',
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'43.0',
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'44.0',
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'45.0',
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'46.0',
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'47.0')
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ua_os = ('Windows NT 6.3; WOW64',
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'X11; Linux x86_64',
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'X11; Linux x86')
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ua = "Mozilla/5.0 ({os}; rv:{version}) Gecko/20100101 Firefox/{version}"
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blocked_tags = ('script',
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'style')
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def gen_useragent():
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# TODO
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return ua.format(os=choice(ua_os), version=choice(ua_versions))
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def searx_useragent():
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return 'searx/{searx_version} {suffix}'.format(
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searx_version=VERSION_STRING,
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suffix=settings['outgoing'].get('useragent_suffix', ''))
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def highlight_content(content, query):
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if not content:
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return None
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# ignoring html contents
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# TODO better html content detection
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if content.find('<') != -1:
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return content
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query = query.decode('utf-8')
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if content.lower().find(query.lower()) > -1:
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query_regex = u'({0})'.format(re.escape(query))
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content = re.sub(query_regex, '<span class="highlight">\\1</span>',
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content, flags=re.I | re.U)
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else:
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regex_parts = []
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for chunk in query.split():
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if len(chunk) == 1:
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regex_parts.append(u'\W+{0}\W+'.format(re.escape(chunk)))
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else:
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regex_parts.append(u'{0}'.format(re.escape(chunk)))
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query_regex = u'({0})'.format('|'.join(regex_parts))
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content = re.sub(query_regex, '<span class="highlight">\\1</span>',
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content, flags=re.I | re.U)
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return content
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class HTMLTextExtractor(HTMLParser):
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def __init__(self):
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HTMLParser.__init__(self)
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self.result = []
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self.tags = []
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def handle_starttag(self, tag, attrs):
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self.tags.append(tag)
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def handle_endtag(self, tag):
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if not self.tags:
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return
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if tag != self.tags[-1]:
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raise Exception("invalid html")
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self.tags.pop()
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def is_valid_tag(self):
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return not self.tags or self.tags[-1] not in blocked_tags
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def handle_data(self, d):
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if not self.is_valid_tag():
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return
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self.result.append(d)
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def handle_charref(self, number):
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if not self.is_valid_tag():
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return
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if number[0] in (u'x', u'X'):
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codepoint = int(number[1:], 16)
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else:
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codepoint = int(number)
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self.result.append(unichr(codepoint))
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def handle_entityref(self, name):
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if not self.is_valid_tag():
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return
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# codepoint = htmlentitydefs.name2codepoint[name]
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# self.result.append(unichr(codepoint))
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self.result.append(name)
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def get_text(self):
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return u''.join(self.result).strip()
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def html_to_text(html):
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html = html.replace('\n', ' ')
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html = ' '.join(html.split())
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s = HTMLTextExtractor()
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s.feed(html)
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return s.get_text()
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class UnicodeWriter:
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"""
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A CSV writer which will write rows to CSV file "f",
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which is encoded in the given encoding.
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"""
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def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
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# Redirect output to a queue
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self.queue = cStringIO.StringIO()
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self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
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self.stream = f
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self.encoder = getincrementalencoder(encoding)()
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def writerow(self, row):
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unicode_row = []
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for col in row:
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if type(col) == str or type(col) == unicode:
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unicode_row.append(col.encode('utf-8').strip())
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else:
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unicode_row.append(col)
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self.writer.writerow(unicode_row)
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# Fetch UTF-8 output from the queue ...
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data = self.queue.getvalue()
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data = data.decode("utf-8")
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# ... and reencode it into the target encoding
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data = self.encoder.encode(data)
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# write to the target stream
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self.stream.write(data)
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# empty queue
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self.queue.truncate(0)
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def writerows(self, rows):
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for row in rows:
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self.writerow(row)
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def get_themes(root):
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"""Returns available themes list."""
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static_path = os.path.join(root, 'static')
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templates_path = os.path.join(root, 'templates')
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themes = os.listdir(os.path.join(static_path, 'themes'))
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return static_path, templates_path, themes
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def get_static_files(base_path):
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base_path = os.path.join(base_path, 'static')
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static_files = set()
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base_path_length = len(base_path) + 1
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for directory, _, files in os.walk(base_path):
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for filename in files:
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f = os.path.join(directory[base_path_length:], filename)
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static_files.add(f)
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return static_files
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def get_result_templates(base_path):
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base_path = os.path.join(base_path, 'templates')
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result_templates = set()
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base_path_length = len(base_path) + 1
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for directory, _, files in os.walk(base_path):
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if directory.endswith('result_templates'):
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for filename in files:
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f = os.path.join(directory[base_path_length:], filename)
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result_templates.add(f)
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return result_templates
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def format_date_by_locale(date, locale_string):
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# strftime works only on dates after 1900
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if date.year <= 1900:
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return date.isoformat().split('T')[0]
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if locale_string == 'all':
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locale_string = settings['ui']['default_locale'] or 'en_US'
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return format_date(date, locale=locale_string)
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def dict_subset(d, properties):
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result = {}
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for k in properties:
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if k in d:
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result[k] = d[k]
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return result
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def prettify_url(url, max_length=74):
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if len(url) > max_length:
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chunk_len = max_length / 2 + 1
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return u'{0}[...]{1}'.format(url[:chunk_len], url[-chunk_len:])
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else:
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return url
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# get element in list or default value
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def list_get(a_list, index, default=None):
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if len(a_list) > index:
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return a_list[index]
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else:
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return default
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