/**
 * Copyright (c) 2006 Parity Communications, Inc. 
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Sergey Yakovlev - initial API and implementation
 */

package org.eclipse.ecf.internal.provider.rss.http;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;

/**
 * A HTTP request message
 * 
 */
public class HttpRequest extends HttpMessage {

	private String method;
	private URL url;
	private String version;

	private static final int DEFAULT_PORT = 80;

	/** Creates a new instance of HttpRequest 
	 * @param method 
	 * @param url 
	 * @param version */
	public HttpRequest(String method, URL url, String version) {
		this.method = method;
		this.version = version;
		setURL(url);
		hasBody = false;
	}

	public HttpRequest(String method, String urlstring, String version) throws MalformedURLException {
		this(method, new URL(urlstring), version);
	}

	public HttpRequest(String method, String urlstring) throws MalformedURLException {
		this(method, new URL(urlstring), DEFAULT_VERSION);
	}

	public HttpRequest(String method, URL url) {
		this(method, url, DEFAULT_VERSION);
	}

	/**
	 * generate a Request Message which will be read from the specified
	 * InputStream
	 * @param in 
	 * @throws MalformedURLException 
	 * @throws IOException 
	 */
	public HttpRequest(InputStream in) throws MalformedURLException, IOException {
		super(in);
	}

	/**
	 * Reads the head of the message (startline and headers) from the
	 * InputStream, and parses the startline for command, url and protocol.
	 * @throws IOException 
	 * @throws MalformedURLException 
	 */
	public void readHead() throws IOException, MalformedURLException {
		super.readHead();

		String strURI;

		// parse requestline
		final int i = startLine.indexOf(' ');
		final int j = startLine.indexOf(' ', i + 1);

		method = startLine.substring(0, i);
		strURI = startLine.substring(i + 1, j);
		version = startLine.substring(j + 1);

		setURL(URI.create("http://localhost").resolve(strURI).toURL());

		if (method.equals("POST")) {
			hasBody = true;
		} else {
			hasBody = false;
		}
	}

	public String getHost() {
		return url.getHost();
	}

	public int getPort() {
		if (url.getPort() == -1) {
			return DEFAULT_PORT;
		} else {
			return url.getPort();
		}
	}

	public String getURLString() {
		return url.toString();
	}

	public URL getURL() {
		return url;
	}

	public String getPath() {
		return url.getPath();
	}

	public String getAbsPath() {
		String ref;
		String absPath;

		if (url.getRef() != null) {
			ref = "#" + url.getRef();
		} else {
			ref = "";
		}

		absPath = url.getFile() + ref;
		if (absPath == "/" && method.equalsIgnoreCase("OPTIONS")) {
			absPath = "*";
		}
		return absPath;
	}

	public void setHost(String host) {
	}

	public void setURL(URL url) {
		this.url = url;
		setHeader("Host", url.getHost());
	}

	public void setVersion(String s) {
		version = s;
	}

	public String getStartLine() {
		return method + " " + this.getAbsPath() + " " + version;
	}

	public String getAbsoluteStartLine() {
		return method + " " + this.getURLString() + " " + version;
	}

	/**
	 * write to stream using the default startline (absulute URI)
	 * @param stream 
	 * @throws IOException 
	 */
	public void writeToStream(OutputStream stream) throws IOException {
		super.writeToStream(getAbsoluteStartLine(), stream);
	}
	/*
	 * // Detects browser public boolean isIEBrowser() { if
	 * (containsHeader("user-agent")) { if
	 * (getHeader("user-agent").indexOf("MSIE 4") > -1) { return true; } else
	 * if(getHeader("user-agent").indexOf("MSIE 5") > -1) { return true; } else
	 * if(getHeader("user-agent").indexOf("MSIE 6") > -1) { return true; } }
	 * return false; }
	 * 
	 * public boolean isNNBrowser() { if (containsHeader("user-agent")) { if
	 * (getHeader("user-agent").indexOf("Mozilla/4") > -1) { return true; } else
	 * if(getHeader("user-agent").indexOf("Mozilla/5") > -1) { return true; } }
	 * return false; }
	 */
}