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// HttpURLConnection.java - Subclass of communications links using
// Hypertext Transfer Protocol.
/* Copyright (C) 1999 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
package java.net;
import java.io.*;
/**
* @author Warren Levy <warrenl@cygnus.com>
* @date March 29, 1999.
*/
/**
* Written using on-line Java Platform 1.2 API Specification, as well
* as "The Java Class Libraries", 2nd edition (Addison-Wesley, 1998).
* Status: Believed complete and correct.
*/
public abstract class HttpURLConnection extends URLConnection
{
/* HTTP Success Response Codes */
public static final int HTTP_OK = 200;
public static final int HTTP_CREATED = 201;
public static final int HTTP_ACCEPTED = 202;
public static final int HTTP_NOT_AUTHORITATIVE = 203;
public static final int HTTP_NO_CONTENT = 204;
public static final int HTTP_RESET = 205;
public static final int HTTP_PARTIAL = 206;
/* HTTP Redirection Response Codes */
public static final int HTTP_MULT_CHOICE = 300;
public static final int HTTP_MOVED_PERM = 301;
public static final int HTTP_MOVED_TEMP = 302;
public static final int HTTP_SEE_OTHER = 303;
public static final int HTTP_NOT_MODIFIED = 304;
public static final int HTTP_USE_PROXY = 305;
/* HTTP Client Error Response Codes */
public static final int HTTP_BAD_REQUEST = 400;
public static final int HTTP_UNAUTHORIZED = 401;
public static final int HTTP_PAYMENT_REQUIRED = 402;
public static final int HTTP_FORBIDDEN = 403;
public static final int HTTP_NOT_FOUND = 404;
public static final int HTTP_BAD_METHOD = 405;
public static final int HTTP_NOT_ACCEPTABLE = 406;
public static final int HTTP_PROXY_AUTH = 407;
public static final int HTTP_CLIENT_TIMEOUT = 408;
public static final int HTTP_CONFLICT = 409;
public static final int HTTP_GONE = 410;
public static final int HTTP_LENGTH_REQUIRED = 411;
public static final int HTTP_PRECON_FAILED = 412;
public static final int HTTP_ENTITY_TOO_LARGE = 413;
public static final int HTTP_REQ_TOO_LONG = 414;
public static final int HTTP_UNSUPPORTED_TYPE = 415;
/* HTTP Server Error Response Codes */
public static final int HTTP_SERVER_ERROR = 500;
public static final int HTTP_INTERNAL_ERROR = 501;
public static final int HTTP_BAD_GATEWAY = 502;
public static final int HTTP_UNAVAILABLE = 503;
public static final int HTTP_GATEWAY_TIMEOUT = 504;
public static final int HTTP_VERSION = 505;
protected String method = "GET";
protected int responseCode = -1;
protected String responseMessage;
static boolean followRedirects = true;
protected HttpURLConnection(URL url)
{
super(url);
}
public abstract void disconnect();
public abstract boolean usingProxy();
public static void setFollowRedirects(boolean set)
{
// Throw an exception if an extant security mgr precludes
// setting the factory.
SecurityManager s = System.getSecurityManager();
if (s != null)
s.checkSetFactory();
followRedirects = set;
}
public static boolean getFollowRedirects()
{
return followRedirects;
}
public void setRequestMethod(String method) throws ProtocolException
{
if (connected)
throw new ProtocolException("Already connected");
if (method.equals("GET") || method.equals("POST") ||
method.equals("HEAD") || method.equals("OPTIONS") ||
method.equals("PUT") || method.equals("DELETE") ||
method.equals("TRACE"))
this.method = method;
else
throw new ProtocolException("Invalid HTTP request method");
}
public String getRequestMethod()
{
return method;
}
public int getResponseCode() throws IOException
{
getResponseVals();
return responseCode;
}
public String getResponseMessage() throws IOException
{
getResponseVals();
return responseMessage;
}
private void getResponseVals() throws IOException
{
// Response is the first header received from the connection.
String respField = getHeaderField(0);
if (! respField.startsWith("HTTP/"))
{
// Set to default values on failure.
responseCode = -1;
responseMessage = null;
return;
}
int firstSpc, nextSpc;
firstSpc = respField.indexOf(' ');
nextSpc = respField.indexOf(' ', firstSpc + 1);
responseMessage = respField.substring(nextSpc + 1);
String codeStr = respField.substring(firstSpc + 1, nextSpc);
try
{
responseCode = Integer.parseInt(codeStr);
}
catch (NumberFormatException e)
{
// Set to default values on failure.
responseCode = -1;
responseMessage = null;
}
if (responseCode == HTTP_NOT_FOUND)
throw new FileNotFoundException(url.toString());
else if (responseCode >= 400)
throw new IOException(url.toString() + " " + respField);
}
// TODO12: public Permission getPermission() throws IOException
// {
// }
// TODO12: public InputStream getErrorStream()
// {
// }
}
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