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parse google page, ajax json api is limited to 50 requests

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j 2011-11-28 14:24:21 +01:00
parent 0614f1e5b1
commit b7aba8bfcf
1 changed files with 8 additions and 41 deletions
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49
ox/web/google.py
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@ -1,36 +1,16 @@
# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
import re
import time
import urllib
import urllib2
import weakref
import threading
import Queue
import ox
from ox import stripTags
from ox.utils import json
'''
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?
'''
DEFAULT_MAX_RESULTS = 10
DEFAULT_TIMEOUT = 24*60*60
def readUrl(url, data=None, headers=ox.net.DEFAULT_HEADERS, timeout=DEFAULT_TIMEOUT):
return ox.cache.readUrl(url, data, headers, timeout)
def readUrlUnicode(url, data=None, headers=ox.net.DEFAULT_HEADERS, timeout=DEFAULT_TIMEOUT):
return ox.cache.readUrlUnicode(url, data, headers, timeout)
def quote_plus(s):
if not isinstance(s, str):
@ -42,30 +22,17 @@ def find(query, max_results=DEFAULT_MAX_RESULTS, timeout=DEFAULT_TIMEOUT):
Return max_results tuples with title, url, description
>>> find("The Matrix site:imdb.com", 1)[0][0]
'The Matrix (1999) - IMDb'
u'The Matrix (1999) - IMDb'
>>> find("The Matrix site:imdb.com", 1)[0][1]
'http://www.imdb.com/title/tt0133093/'
u'http://www.imdb.com/title/tt0133093/'
"""
_results = _find(query, timeout=timeout)
url = 'http://google.com/search?q=%s' % quote_plus(query)
data = readUrlUnicode(url, timeout=timeout)
results = []
for r in _results:
results.append((r['titleNoFormatting'], r['unescapedUrl'], stripTags(r['content'])))
for a in re.compile('<a href="(\S+?)" class=l .*?>(.*?)</a>').findall(data):
results.append((stripTags(a[1]), a[0], ''))
if len(results) >= max_results:
break
return results
def _find(query, timeout=DEFAULT_TIMEOUT):
"""
Return parsed json results from google ajax api
>>> _find("The Matrix site:imdb.com")[0]['titleNoFormatting']
'The Matrix (1999) - IMDb'
>>> _find("The Matrix site:imdb.com")[0]['url']
'http://www.imdb.com/title/tt0133093/'
"""
url = 'http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=%s' % quote_plus(query)
results = json.loads(ox.cache.readUrl(url, timeout=timeout))['responseData']['results']
return results