/*
* $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/StatusLine.java,v 1.9.2.2 2003/12/05 20:18:22 oglueck Exp $
* $Revision: 1.9.2.2 $
* $Date: 2003/12/05 20:18:22 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999-2003 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "The Jakarta Project", "Commons", and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact [email protected].
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
* [Additional notices, if required by prior licensing conditions]
*
*/
package org.apache.commons.httpclient;
/**
* Represents a Status-Line as returned from a HTTP server.
*
* <a href="http://www.ietf.org/rfc/rfc2616.txt">RFC2616</a> states
* the following regarding the Status-Line:
* <pre>
* 6.1 Status-Line
*
* The first line of a Response message is the Status-Line, consisting
* of the protocol version followed by a numeric status code and its
* associated textual phrase, with each element separated by SP
* characters. No CR or LF is allowed except in the final CRLF sequence.
*
* Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF
* </pre>
* <p>
* This class is immutable and is inherently thread safe.
*
* @see HttpStatus
* @author <a href="mailto:[email protected]">Jeff Dever</a>
* @author <a href="mailto:[email protected]">Mike Bowler</a>
* @version $Id: StatusLine.java,v 1.9.2.2 2003/12/05 20:18:22 oglueck Exp $
* @since 2.0
*/
public class StatusLine {
// ----------------------------------------------------- Instance Variables
/** The original Status-Line. */
private final String statusLine;
/** The HTTP-Version. */
private final String httpVersion;
/** The Status-Code. */
private final int statusCode;
/** The Reason-Phrase. */
private final String reasonPhrase;
// ----------------------------------------------------------- Constructors
/**
* Default constructor.
*
* @param statusLine the status line returned from the HTTP server
* @throws HttpException if the status line is invalid
*/
public StatusLine(final String statusLine)
throws HttpException {
int length = statusLine.length();
int at = 0;
int start = 0;
try {
while (Character.isWhitespace(statusLine.charAt(at))) {
++at;
++start;
}
if (!"HTTP".equals(statusLine.substring(at, at += 4))) {
throw new HttpException("Status-Line '" + statusLine
+ "' does not start with HTTP");
}
} catch (StringIndexOutOfBoundsException e) {
throw new HttpException("Status-Line '" + statusLine + "' is not valid");
}
//handle the HTTP-Version
at = statusLine.indexOf(" ", at);
if (at <= 0) {
throw new HttpException(
"Unable to parse HTTP-Version from the status line: '"
+ statusLine + "'");
}
this.httpVersion = (statusLine.substring(start, at)).toUpperCase();
//advance through spaces
while (statusLine.charAt(at) == ' ') {
at++;
}
//handle the Status-Code
int to = statusLine.indexOf(" ", at);
if (to < 0) {
to = length;
}
try {
this.statusCode = Integer.parseInt(statusLine.substring(at, to));
} catch (NumberFormatException e) {
throw new HttpException(
"Unable to parse status code from status line: '"
+ statusLine + "'");
}
//handle the Reason-Phrase
at = to + 1;
try {
if (at < length) {
this.reasonPhrase = statusLine.substring(at).trim();
} else {
this.reasonPhrase = "";
}
} catch (StringIndexOutOfBoundsException e) {
throw new HttpException("Status text not specified: '"
+ statusLine + "'");
}
//save the original Status-Line if everything is OK
this.statusLine = new String(statusLine);
}
// --------------------------------------------------------- Public Methods
/**
* @return the Status-Code
*/
public final int getStatusCode() {
return statusCode;
}
/**
* @return the HTTP-Version
*/
public final String getHttpVersion() {
return httpVersion;
}
/**
* @return the Reason-Phrase
*/
public final String getReasonPhrase() {
return reasonPhrase;
}
/**
* Return the status line as it was set by the constructor.
* @return a string represenation of this object.
*/
public final String toString() {
return statusLine;
}
/**
* Tests if the string starts with 'HTTP' signature.
* @param s string to test
* @return <tt>true</tt> if the line starts with 'HTTP'
* signature, <tt>false</tt> otherwise.
*/
public static boolean startsWithHTTP(final String s) {
try {
int at = 0;
while (Character.isWhitespace(s.charAt(at))) {
++at;
}
return ("HTTP".equals(s.substring(at, at + 4)));
} catch (StringIndexOutOfBoundsException e) {
return false;
}
}
}
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