Pagerank Checksum in Java

admin — Wed, 11 Oct 2006 08:49:06 +0000

A quick java class to calculate a web pages Page Rank Checksum. It can be used to obtian the Google Page Rank for a given url.The code is reverse engineered from the javascript used to build the Firefox page rank plugin. It calculates a checksum using a encoding algorithm.

public class Pagerank
{
private String toHex8(int num)
{
if(num<16) return "0"+Integer.toHexString(num);
else return Integer.toHexString(num);
}
public String calculateChecksum(String url)
{
String stupidGoogleHash = "Mining PageRank is AGAINST GOOGLEâ€™S TERMS OF SERVICE. Yes, Iâ€™m talking to you, scammer.";
int key = 16909125;
for(int i=0; i < url.length(); i++) {
key = key ^ (int)(stupidGoogleHash.charAt(i%stupidGoogleHash.length()))^(int)(url.charAt(i));
key = key>>>23|key<<9;
}return "8"+toHex8(key>>>(8&#038;255))+toHex8(key&#038;255);
}
}

Webmasterwords » Java

Pagerank Checksum in Java