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1、跨服务器登录验证(单点登录SSO的过 程和Java实现收藏如果我们的网站需要和另一个域名做统一认证，也就是在我们网站登录，但真正 的功能却在另一个网站来提供。许多都以passport的方式。整个认证可以分三步完成 第一步：本地验证这个很简单，输入本地的用户名和密码，然后服务器认证通过，并返回正确的Cookie;第二步：做远程认证，并返回远程连接通过本地Cookie,确认用户合法性，然后服务器端调用远程的登录程序，返回一个远程认证号的URL这个URL里面包含了一个唯一的认证码，使用Location的方式第三步：远程登录客户端使用前一步的URL,访问远程的服务器，服务器确认认证码的正确性，再返回正
2、确的远程Cookie.至此，本地认证，通过一个 URL,实现了远程认证。以下是示范代码，是Verycd的武林英雄的认证过程，其登录服务是verycd提供 的，而真实服务时9wee提供的package org.javare n.hero;import java.io.BufferedReader;import java.io .In putStream;import java.i o.ln putStreamReader;import java.io.OutputStream;import java .n et.Socket;import java .n et.URLE ncoder;impor
3、t java.util.Sca nner;/*跨服务器登录验证(单点登录SSO的过程和Java实现* author JAVA 世纪网(, )*/public class Logi n public static String getCookie() System.out.print(”输入用户名:);Scanner in = new Scann er(System.i n);Stri ng user name = in.n ext();System.out.print(输入密码:);Stri ng password = in.n ext();try / 本地认证String cookie =
4、postLog in( user name, password);if (cookie = n ull) return n ull;/服务器远程认证String url = getLog in 2(cookie);if (url = n ull) return n ull;/远程访问认证String cookie2 =getLog in 3(url.substri ng(”http:/ .len gth();/ System.out.pri ntl n( cookie2);retur n cookie2; catch (Excepti on ex) ex.pri ntStackTrace();
5、return nu II;private static String postLogi n( Stri nguser name, String password) throwsExcepti on Socket socket = new Socket(, 80);try Stri ngBuilder sb = new Stri ngBuilder();sb.appe nd(POST /sig nin? f=out HTTP/1.1rn);sb.appe nd(Host: r n);sb.appe nd(User-Age nt: Mozilla/5.0 (Wi ndows; U; Win dow
6、s NT 5.1;zh-CN; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3rn);sb.appe nd(Accept:text/html,applicati on /xhtml+xml,applicatio n/xml;q=0.9,*/*;q=0.8rn);sb.appe nd(Accept-La nguage: zh-c n, zh;q=0.5r n);sb.appe nd(Accept-E ncodi ng: gzip,deflater n);sb.append(Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7rn)
7、;sb.appe nd(Referer:http:/ n”)；sb.appe nd(C onten t-Type: application/x-www-form-urlencodedrn);String data = ru=http%3A%2F%2F%2F3rdServices%2F50hero&login_submi t=%E7%99%BB%E5%BD%95&username=+ URLEncoder.encode(username, UTF-8) + &password= + URLEncoder.encode(password, UTF-8);sb.append(Content-Leng
8、th: + data.getBytes(UTF-8).length + rn);sb.append(rn);sb.append(data);OutputStream os = socket.getOutputStream();os.write(sb.toString().getBytes(UTF-8);os.flush();InputStream is = socket.getInputStream();BufferedReader reader = new BufferedReader(newInputStreamReader(is, UTF-8); / 读取结果String line;St
9、ringBuilder cookieSb = new StringBuilder();int index;while (line = reader.readLine() != null) if (line.startsWith(Set-Cookie:) if (!line.contains(=deleted;) index = line.indexOf(;);if (index 12) cookieSb.append(line.substring(12, index + 1); else if (line.startsWith(location:) if (line.contains(erro
10、r_code) return null;is.close();reader.close();return cookieSb.toString(); finally socket.close();private static String getLogin2(String cookie) throws Exception Socket socket = new Socket(, 80);try StringBuilder sb = new StringBuilder();sb.appe nd(GET/sig nin ?ak=50hero&ru=http%3A%2F%2F%2Fpassport.p
11、hp HTTP/1.1rn);sb.appe nd(Host: r n);sb.appe nd(User-Age nt: Mozilla/5.0 (Wi ndows; U; Win dows NT 5.1;zh-CN; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3rn);sb.appe nd(Accept:text/html,applicati on /xhtml+xml,applicatio n/xml;q=0.9,*/*;q=0.8rn);sb.appe nd(Accept-La nguage: zh-c n, zh;q=0.5r n);sb.appe
12、nd(Accept-E ncodi ng: gzip,deflater n);sb.append(Accept-Charset: GB2312,utf-8;q=0.7,*;q=0.7rn);sb.appe nd(Referer:http:/ n”)；sb.ap pe nd(Cookie: + cookie + rn);sb.appe nd(r n);OutputStream os = socket.getOutputStream();os.write(sb.toStri ng().getBytes(UTF-8);os.flush();In putStream is = socket.getI
13、nputStream();BufferedReader reader = new BufferedReader( newIn putStreamReader(is, UTF-8); /读取结果Stri ng line;while (line = reader.readLine() != null) if (li ne.startsWith(locatio n:) retur n lin e.substri ng(10);is.close();reader.close();return nu II; fin ally socket.close();private static String ge
14、tLogin3(String url) throws Exception Socket socket = new Socket(, 80);try Stri ngBuilder sb = new Stri ngBuilder();sb.appe nd(GET + url + HTTP/1.1rn);sb.appe nd(Host: r n);sb.appe nd(User-Age nt: Mozilla/5.0 (Wi ndows; U; Win dows NT 5.1;zh-CN; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3rn);sb.appe nd(Accept:te
