/* this belongs to the WebRaveler package */
package webraveler.vurl;

import java.io.*;


import webraveler.http.HTTPRequest;
import webraveler.http.HTTPResponse;
import webraveler.proxy.ProxyClient;
import webraveler.ravel.Raveler;
/**
 * This VURL unravels a page.
 *
 * @author The Web Raveler Development Squad
 * @version 1.0
 */
public class UnravelVURL implements VURL{
	HTTPRequest unravelRequest;
	String uriString;
	
	/**
	 * Constructs an UnravelVURL with the original request
	 */
 	public UnravelVURL (HTTPRequest request) {
 		unravelRequest = request;
 	} // UnravelVURL()

	/**
	 * Constructs an UnravelVURL with the url
	 */
	public UnravelVURL (String url) {
		this.uriString = url;
		unravelRequest = HTTPRequest.generateGetRequest(url);
	}

  /**
   * Gets the response directly from the server using the original request
   */
  public HTTPResponse resolveVURL (String username, String query, HTTPRequest request, Raveler ravel) {
  	System.out.println("UnravelVURL: Unraveling page '"+unravelRequest.uriString()+"'");
	HTTPResponse response = null;
	ProxyClient proxy;
	proxy = new ProxyClient(unravelRequest);
	try {
		response = proxy.getResponse();
	}catch(IOException ioe) {
		return null;
	} //catch 
	
	/* try making an HTMLPage object to represent the content, if applicable.
	* also, we have to make URLs absolute, using VURLs. */
	String contentType;
	contentType = (String) response.getHeader("content-type");
	if ( contentType != null && contentType.equalsIgnoreCase("text/html")) {
		response.htmlPage.makeURLsAbsolute(unravelRequest,response);
		//  System.out.println("response.entityText = "+response.entityText);
	}//if
	
	return response;
  } // resolveVURL
	

} // class UnravelVURL