python-oxweb/oxweb/google.py

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# -*- coding: utf-8 -*-
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# vi:si:et:sw=4:sts=4:ts=4
import re
import time
import urllib
import urllib2
import weakref
import threading
import Queue
import simplejson
import oxlib
from oxlib import stripTags
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'''
usage:
import google
google.find(query)
for result in google.find(query): result
result is title, url, description
google.find(query, max_results)
FIXME: how search depper than first page?
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'''
DEFAULT_MAX_RESULTS = 10
DEFAULT_TIMEOUT = 24*60*60
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def readUrl(url, data=None, headers=oxlib.net.DEFAULT_HEADERS, timeout=DEFAULT_TIMEOUT):
return oxlib.cache.readUrl(url, data, headers, timeout)
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def quote_plus(s):
return urllib.quote_plus(s.encode('utf-8'))
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def find(query, max_results=DEFAULT_MAX_RESULTS, timeout=DEFAULT_TIMEOUT):
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url = "http://www.google.com/search?q=%s" % quote_plus(query)
data = readUrl(url, timeout=timeout)
link_re = r'<a href="(?P<url>[^"]*?)" class=l.*?>(?P<name>.*?)</a>' + \
r'.*?(?:<br>|<table.*?>)' + \
r'(?P<desc>.*?)' + '(?:<font color=#008000>|<a)'
results = []
for match in re.compile(link_re, re.DOTALL).finditer(data):
(name, url, desc) = match.group('name', 'url', 'desc')
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results.append((stripTags(name), url, stripTags(desc)))
if len(results) > max_results:
results = results[:max_results]
return results
def _find(query):
url = 'http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=%s' % quote_plus(query)
results = simplejson.loads(oxlib.cache.readUrlUnicode(url))['responseData']['results']
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return results
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