2011-02-07 02:25:55 +03:00
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#!/usr/bin/env python
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#
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# Script for getting Google Page Rank of page
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# Google Toolbar 3.0.x/4.0.x Pagerank Checksum Algorithm
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#
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# original from http://pagerank.gamesaga.net/
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# this version was adapted from http://www.djangosnippets.org/snippets/221/
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# by Corey Goldberg - 2010
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#
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# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
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import urllib
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def get_pagerank(url):
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hsh = check_hash(hash_url(url))
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gurl = 'http://www.google.com/search?client=navclient-auto&features=Rank:&q=info:%s&ch=%s' % (urllib.quote(url), hsh)
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try:
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f = urllib.urlopen(gurl)
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rank = f.read().strip()[9:]
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except Exception:
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rank = 'N/A'
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if rank == '':
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rank = '0'
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return rank
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def int_str(string, integer, factor):
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for i in range(len(string)) :
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integer *= factor
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integer &= 0xFFFFFFFF
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integer += ord(string[i])
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return integer
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def hash_url(string):
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c1 = int_str(string, 0x1505, 0x21)
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c2 = int_str(string, 0, 0x1003F)
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c1 >>= 2
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c1 = ((c1 >> 4) & 0x3FFFFC0) | (c1 & 0x3F)
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c1 = ((c1 >> 4) & 0x3FFC00) | (c1 & 0x3FF)
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c1 = ((c1 >> 4) & 0x3C000) | (c1 & 0x3FFF)
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t1 = (c1 & 0x3C0) << 4
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t1 |= c1 & 0x3C
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t1 = (t1 << 2) | (c2 & 0xF0F)
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t2 = (c1 & 0xFFFFC000) << 4
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t2 |= c1 & 0x3C00
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t2 = (t2 << 0xA) | (c2 & 0xF0F0000)
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return (t1 | t2)
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def check_hash(hash_int):
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hash_str = '%u' % (hash_int)
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flag = 0
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check_byte = 0
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i = len(hash_str) - 1
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while i >= 0:
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byte = int(hash_str[i])
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if 1 == (flag % 2):
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byte *= 2;
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byte = byte / 10 + byte % 10
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check_byte += byte
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flag += 1
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i -= 1
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check_byte %= 10
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if 0 != check_byte:
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check_byte = 10 - check_byte
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if 1 == flag % 2:
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if 1 == check_byte % 2:
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check_byte += 9
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check_byte >>= 1
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return '7' + str(check_byte) + hash_str
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