squid更新缓存

1.在squid.conf文件里添加

acl Purge method PURGE    
acl Localhost src 192.168.1.1/10 //你的前端服务器IP地址,如Nginx服务器IP    

http_access allow Purge Localhost    
http_access deny Purge

2.squid.properties

servers=192.168.1.1:3128

3.PurgeManager.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.Properties;

public class PurgeManager {
    String[] servers = {};

    private static PurgeManager pm = null;

    public synchronized static PurgeManager getInstance() {
        if (pm == null) {
            pm = new PurgeManager();
        }
        return pm;
    }

   
    private PurgeManager() {
        InputStream inputStream = this.getClass().getResourceAsStream("squid.properties");
        Properties p = new Properties();
        try {
            p.load(inputStream);
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        String ipstr = p.getProperty("servers");
        System.out.println("ipstr=========" + ipstr);

        if (ipstr != null) {
            servers = ipstr.split(";");
        }
        try {
            inputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

   
    public String purgeSquid(String url) {
        String msg = "";
        System.out.println("PURGE " + url);
        for (int i = 0; i < servers.length; i++) {
            String t[] = servers[i].split(":");
            if (t.length == 1)
                doOneSquid(t[0], url);
            else
                doOneSquid(t[0], url, Integer.parseInt(t[1]));
        }
        return msg;
    }

   
    private String doOneSquid(String serverip, String purl) {
        return doOneSquid(serverip, purl, 80);
    }

   
    private String doOneSquid(String serverip, String purl, int port) {
        String message = "";
        // 获取hostname
        String hname = parseHostNameFromUrl(purl);
        try {
            Socket s = new Socket(serverip, port);
            InputStream is = s.getInputStream();
            OutputStream os = s.getOutputStream();

            BufferedReader in = new BufferedReader(new InputStreamReader(is));
            PrintWriter out = new PrintWriter(new OutputStreamWriter(os), true);
            String state = "PURGE " + purl + " HTTP/1.1";

            out.println(state);
            out.println("HOST:" + hname);
            out.println();

            String downstr;
            while ((downstr = in.readLine()) != null) {
                System.out.println(downstr);
                message += downstr + "<br>";
            }
            s.close();

        } catch (Exception e) {
            e.printStackTrace();
            message += "<br>操作失败！";
        }
        return message;
    }

   
    private String parseHostNameFromUrl(String purl) {
        if (purl == null)
            return "";
        int idx1 = 0;
        int idx2 = 0;
        if (purl.toLowerCase().startsWith("http://")) {
            idx1 = 7;
        }
        idx2 = purl.indexOf("/", idx1);
        if (idx2 == -1)
            idx2 = purl.length();
        return purl.substring(idx1, idx2);
    }

    public static void main(String[] args) {      
    	//System.out.println(PurgeManager.getInstance().
    	//parseHostNameFromUrl("db.com"));
        PurgeManager.getInstance().purgeSquid(http://192.168.1.1:3128/index.html);
    }
}