httpparser.java

来自「JavaExplorer是一个独立于平台的浏览器」· Java 代码 · 共 142 行

/*
 * Created on 12 nov. 03
 *
 * To change the template for this generated file go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
package javaexplorer.manager.http;
import java.io.*;
import java.net.URL;
import java.net.URLConnection;

import javax.swing.text.MutableAttributeSet;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLEditorKit;
import javax.swing.text.html.parser.ParserDelegator;

import javaexplorer.util.XFileBuffer;

/**
 * @author veeb7280
 *
 * To change the template for this generated type comment go to
 * Window>Preferences>Java>Code Generation>Code and Comments
 */
public class HttpParser {
  HttpXF root = null;  
  XFileBuffer buffer = new XFileBuffer();
  HTMLEditorKit.ParserCallback callback = null; 

  
  private static HttpParser hp = new HttpParser();

  public static HttpParser getParser(){
    return hp;
  }

  public HttpParser(){
	callback = new HTMLEditorKit.ParserCallback () {
		boolean start =  false;
		String adress = null;
		String name = null;
		public void handleText(char[] data, int pos) {
			if( start && name == null ) name = new String(data);
			if( name == null || name.length() == 0 ) name = null;
		}
		public void handleStartTag(HTML.Tag t, 
                MutableAttributeSet a, int pos){
			
	        if( t.equals(HTML.Tag.IMG) ){
	            adress = (String) a.getAttribute(HTML.Attribute.SRC);
	            name = (String) a.getAttribute(HTML.Attribute.ALT);
	         }
	         else if(t.equals(HTML.Tag.A)){
	            adress = (String)a.getAttribute(HTML.Attribute.HREF);
	            name = (String)a.getAttribute(HTML.Attribute.ID);
	            start = true;
	         }
	         else if( t.equals(HTML.Tag.MAP) ){
	            adress = (String)a.getAttribute(HTML.Attribute.NAME);
	            name = (String)a.getAttribute(HTML.Attribute.ALT);                
	         }
	         else if(t.equals(HTML.Tag.AREA)){
	            adress = (String)a.getAttribute(HTML.Attribute.HREF);
	            name = (String)a.getAttribute(HTML.Attribute.ALT);                
	         }
	         else if(t.equals(HTML.Tag.FRAME)){
	            adress = (String)a.getAttribute(HTML.Attribute.SRC);
	            name = (String)a.getAttribute(HTML.Attribute.NAME);                
	         }
	         
		}
	         
	    public void handleEndTag(HTML.Tag t, int pos){
	    	
	        if( adress != null ){
	            buffer.add( makeXFile(adress, name) );
	          	}      
	    	
	    	if( start && t.equals(HTML.Tag.A)){
	    		start = false;
	    		name = null;
	    	}
	    }
	    public void handleSimpleTag(HTML.Tag t, 
                MutableAttributeSet a, int pos){
	    	handleStartTag(t, a, pos);
	    	handleEndTag(t, pos);    		    	
	    }
		};  	
  }

  public XFileBuffer parseFile( HttpXF xfile ){
    buffer.clear();
    root = xfile;
    
    read(xfile);
    return buffer;
  }
  
  private HttpXF makeXFile(String address, String name){
    HttpXF xfile = null;
    try{
      URL newURL = new URL(root.getURL(), address);
      //On ne conserve pas les renvois dans la m阭e page s'ils existent
      String test = newURL.getRef();
      if( test != null ){
        //On supprime cette r閒閞ence qui n'a pas d'int閞阾 
        //pour le type de construction XFile
        newURL = new URL(newURL.getProtocol(), newURL.getHost(), newURL.getPort(), newURL.getFile()); 
      }
      if( root.getURL().sameFile(newURL) ) return null;
      xfile = new HttpXF();
      xfile.setLauncher(root.getLauncher());
      xfile.setParent(root);
      xfile.setDirectory(false);
      xfile.setUseLocalFile(false);
      xfile.setURL(newURL);
      if( name != null ){
        xfile.setName(name);
      }
      String contentType = URLConnection.guessContentTypeFromName(newURL.getFile());
      if( contentType != null && contentType.toUpperCase().indexOf("HTML") != -1){
        xfile.setDirectory(true);
      }
    }catch(Exception e){
      xfile = null;
      javaexplorer.util.Log.addError(e);
    }
    return xfile;
  }

  private void read( HttpXF xfile ){
  	try{
    	Reader reader = new InputStreamReader(xfile.getInputStream(0)); 
    	new ParserDelegator().parse(reader, callback, true);
    }catch(Exception e){
        buffer = null;
        javaexplorer.util.Log.addError(e);
    }
  }
}