package com.sodao;
/// <summary>
/// Google PageRank的Checksum算法。
///
///
///
/// </summary>
public class CheckSum {
public CheckSum()
{
}
long GOOGLE_MAGIC = 0xE6359A60l;
private long zeroFill(long a, long b)
{
long z = 0x80000000l;
if ((z & a)!=0)
{
a = (a >> 1);
a &= (~z);
a |= 0x40000000;
a = (a >> (b - 1));
}
else
{
a = (a >> b);
}
return a;
}
private long[] mix(long a, long b, long c)
{
a -= b;
a &= 0xFFFFFFFFl;
a -= c;
a &= 0xFFFFFFFFl;
a ^= (zeroFill(c, 13));
b -= c;
b &= 0xFFFFFFFFl;
b -= a;
b &= 0xFFFFFFFFl;
b ^= (a << 8);
b &= 0xFFFFFFFFl;
c -= a;
c &= 0xFFFFFFFFl;
c -= b;
c &= 0xFFFFFFFFl;
c ^= (zeroFill(b, 13));
a -= b;
a &= 0xFFFFFFFFl;
a -= c;
a &= 0xFFFFFFFFl;
a ^= (zeroFill(c, 12));
b -= c;
b &= 0xFFFFFFFFl;
b -= a;
b &= 0xFFFFFFFFl;
b ^= (a << 16);
b &= 0xFFFFFFFFl;
c -= a;
c &= 0xFFFFFFFFl;
c -= b;
c &= 0xFFFFFFFFl;
c ^= (zeroFill(b, 5));
a -= b;
a &= 0xFFFFFFFFl;
a -= c;
a &= 0xFFFFFFFFl;
a ^= (zeroFill(c, 3));
b -= c;
b &= 0xFFFFFFFFl;
b -= a;
b &= 0xFFFFFFFFl;
b ^= (a << 10);
b &= 0xFFFFFFFFl;
c -= a;
c &= 0xFFFFFFFFl;
c -= b;
c &= 0xFFFFFFFFl;
c ^= (zeroFill(b, 15));
// a &= 0xFFFFFFFFl;
// b &= 0xFFFFFFFFl;
// c &= 0xFFFFFFFFl;
// System.out.println("a:@" + a);
// System.out.println("b:@" + b);
// System.out.println("c:@" + c);
long[] ret = { a, b, c };
return(ret) ;
}
private long GoogleCH(long[] url, int length, long init)
{
if (length == 0)
{
length = (int)url.length;
}
long a, b;
a = b = 0x9E3779B9l;
long c = init;
int k = 0;
int len = length;
long[] m_mix = new long[3];
// System.out.println("a:"+a);
// System.out.println("b:"+b);
// System.out.println("c:"+c);
while (len >= 12)
{
a += url[k + 0];
//System.out.println("a1:"+a);
a += ((long)url[k + 1]) << 8 ;
//System.out.println("a2:"+a);
a += (((long)url[k + 2]) << 16);
//System.out.println("a3:"+a);
a += (((long)url[k + 3]) << 24);
//System.out.println("a4:"+a);
a &= 0xFFFFFFFFl;
b += (url[k + 4] + (long)(url[k + 5] << 8) + (long)(url[k + 6] << 16) + (long)(url[k + 7] << 24));
c += (url[k + 8] + (long)(url[k + 9] << 8) + (long)(url[k + 10] << 16) + (long)(url[k + 11] << 24));
b &= 0xFFFFFFFFl;
c &= 0xFFFFFFFFl;
// System.out.println("a:"+a);
// System.out.println("b:"+b);
// System.out.println("c:"+c);
m_mix = mix(a, b, c);
a = m_mix[0]; b = m_mix[1]; c = m_mix[2];
// a &= 0xFFFFFFFFl;
// b &= 0xFFFFFFFFl;
// c &= 0xFFFFFFFFl;
k += 12;
len -= 12;
}
//System.out.println("a:"+a);
//System.out.println("b:"+b);
//System.out.println("c:"+c);
c += length;
//System.out.println("len:"+len);
switch (len) /* all the case statements fall through */
{
case 11:
{
c += (long)(url[k + 10] << 24);
c &= 0xFFFFFFFFl;
c += (long)(url[k + 9] << 16);
c &= 0xFFFFFFFFl;
c += (long)(url[k + 8] << 8);
c &= 0xFFFFFFFFl;
b += (long)(url[k + 7] << 24);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 6] << 16);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 10:
{
c += (long)(url[k + 9] << 16);
c &= 0xFFFFFFFFl;
c += (long)(url[k + 8] << 8);
c &= 0xFFFFFFFFl;
b += (long)(url[k + 7] << 24);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 6] << 16);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 9:
{
c += (long)(url[k + 8] << 8);
c &= 0xFFFFFFFFl;
b += (long)(url[k + 7] << 24);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 6] << 16);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
/* the first byte of c is reserved for the length */
case 8:
{
b += (long)(url[k + 7] << 24);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 6] << 16);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 7:
{
b += (long)(url[k + 6] << 16);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 6:
{
b += (long)(url[k + 5] << 8);
b &= 0xFFFFFFFFl;
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 5:
{
b += (long)(url[k + 4]);
b &= 0xFFFFFFFFl;
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 4:
{
a += (long)(url[k + 3] << 24);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 3:
{
a += (long)(url[k + 2] << 16);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
//System.out.println("a:!!!!"+a);
break;
}
case 2:
{
a += (long)(url[k + 1] << 8);
a &= 0xFFFFFFFFl;
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
case 1:
{
a += (long)(url[k + 0]);
a &= 0xFFFFFFFFl;
break;
}
/* case 0: nothing left to add */
}
m_mix = mix(a, b, c);
/*-------------------------------------------- report the result */
return m_mix[2];
}
private long GoogleCH(String url, int length)
{
long[] m_urlint = new long[url.length()];
for (int i = 0; i < url.length(); i++)
{
m_urlint[i] = url.charAt(i);
//System.out.println("m_urlint[i]:"+m_urlint[i]);
}
return GoogleCH(m_urlint, length, GOOGLE_MAGIC);
}
private long GoogleCH(String sURL)
{
return GoogleCH(sURL, 0);
}
private long GoogleCH(long[] url, int length)
{
return GoogleCH(url, length, GOOGLE_MAGIC);
}
private long[] c32to8bit(long[] arr32)
{
long[] arr8 = new long[arr32.length * 4 + 3];
for (int i = 0; i < arr32.length; i++)
{
for (int bitOrder = i * 4; bitOrder <= i * 4 + 3; bitOrder++)
{
arr8[bitOrder] = arr32[i] & 255;
arr32[i] = zeroFill(arr32[i], 8);
}
}
return arr8;
}
//新算法,ToolBar 版本>>=2.0.114
public String CalculateChecksum(String sURL)
{
long ch = GoogleCH("info:" + sURL);
//System.out.println("ch:"+ch);
ch = (((ch / 7) << 2) | (((int)(ch % 13)) & 7));
//System.out.println("ch2:"+ch);
long[] prbuf = new long[20];
prbuf[0] = ch;
for (int i = 1; i < 20; i++)
{
prbuf[i] = prbuf[i - 1] - 9;
//System.out.println("prbuf[i]:"+prbuf[i]);
}
ch = GoogleCH(c32to8bit(prbuf), 80);
return "6"+ch;
}
//老算法,ToolBar 版本<2.0.114
/*public String CalculateChecksumOld(String sURL)
{
int ch = GoogleCH("info:" + sURL);
String CalculateChecksum = "6" + ((ch));
return CalculateChecksum;
}*/
}
package com.sodao;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
public class PageRank {
/*
* public static void main(String[] args)throws Exception { String url =
* "http://www.safe-drive.com/";
*
* System.out.println(getPageRank(url)); }
*/
public static String getPageRank(String url) {
String responseFromServer = "";
CheckSum cs = new CheckSum();
String s = cs.CalculateChecksum(url);
try {
URL openurl = new URL(
"http://www.google.cn/search?client=navclient-auto&features=Rank:&q=info:"
+ url + "&ch=" + s);
URLConnection HttpWReq = openurl.openConnection();
HttpWReq.setRequestProperty("Accept", "*/*");
HttpWReq.setRequestProperty("User-Agent",
"Mozilla/4.0 (compatible; MSIE 5.00; Windows 98)");
BufferedReader r = new BufferedReader(new InputStreamReader(
HttpWReq.getInputStream()));
while ((s = r.readLine()) != null) {
// System.out.println(s);
responseFromServer = s;
}
r.close();
} catch (Exception e) {
e.printStackTrace();
}
String[] sp = responseFromServer.split(":");
String lbValue = null;
if (sp.length == 3)
lbValue = "查询成功! PR = " + sp[2].toString();
else
lbValue = "查询失败!";
return (lbValue);
}
public static void main(String[] args) {
System.out.println(new PageRank().getPageRank("http://sports.sina.com.cn"));
}
}
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