/**
* Copyright 2005-2011 Noelios Technologies.
*
* The contents of this file are subject to the terms of one of the following
* open source licenses: LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL 1.0 (the
* "Licenses"). You can select the license that you prefer but you may not use
* this file except in compliance with one of these Licenses.
*
* You can obtain a copy of the LGPL 3.0 license at
* http://www.opensource.org/licenses/lgpl-3.0.html
*
* You can obtain a copy of the LGPL 2.1 license at
* http://www.opensource.org/licenses/lgpl-2.1.php
*
* You can obtain a copy of the CDDL 1.0 license at
* http://www.opensource.org/licenses/cddl1.php
*
* You can obtain a copy of the EPL 1.0 license at
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the Licenses for the specific language governing permissions and
* limitations under the Licenses.
*
* Alternatively, you can obtain a royalty free commercial license with less
* limitations, transferable or non-transferable, directly at
* http://www.noelios.com/products/restlet-engine
*
* Restlet is a registered trademark of Noelios Technologies.
*/
package org.restlet.engine.header;
import static org.restlet.engine.header.HeaderUtils.isSpace;
import java.io.IOException;
import org.restlet.data.ChallengeRequest;
import org.restlet.data.ChallengeScheme;
import org.restlet.data.Parameter;
/**
* Challenge request header reader.
*
* @author Thierry Boileau
*/
public class ChallengeRequestReader extends HeaderReader<ChallengeRequest> {
/**
* Constructor.
*
* @param header
* The header to read.
*/
public ChallengeRequestReader(String header) {
super(header);
}
@Override
public ChallengeRequest readValue() throws IOException {
ChallengeRequest result = null;
// The challenge is that this header is a comma separated lst of
// challenges, and that each challenges is also a comma separated list,
// but of parameters.
skipSpaces();
if (peek() != -1) {
String scheme = readToken();
result = new ChallengeRequest(new ChallengeScheme("HTTP_" + scheme,
scheme));
skipSpaces();
// Header writer that will reconstruct the raw value of a challenge.
HeaderWriter<Parameter> w = new HeaderWriter<Parameter>() {
@Override
public HeaderWriter<Parameter> append(Parameter value) {
appendExtension(value);
return this;
}
};
boolean stop = false;
while (peek() != -1 && !stop) {
boolean sepSkipped = skipValueSeparator();
// Record the start of the segment
mark();
// Read a token and the next character.
readToken();
int nextChar = read();
reset();
if (isSpace(nextChar)) {
// A new scheme has been discovered.
stop = true;
} else {
// The next segment is considered as a parameter
if (sepSkipped) {
// Add the skipped value separator.
w.appendValueSeparator();
}
// Append the parameter
w.append(readParameter());
}
}
result.setRawValue(w.toString());
}
return result;
}
}