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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* 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/>.
*
*/
package ch.boye.httpclientandroidlib.impl.client;
import java.net.URI;
import java.net.URISyntaxException;
import ch.boye.httpclientandroidlib.androidextra.HttpClientAndroidLog;
/* LogFactory removed by HttpClient for Android script. */
import ch.boye.httpclientandroidlib.Header;
import ch.boye.httpclientandroidlib.HttpHost;
import ch.boye.httpclientandroidlib.HttpRequest;
import ch.boye.httpclientandroidlib.HttpResponse;
import ch.boye.httpclientandroidlib.HttpStatus;
import ch.boye.httpclientandroidlib.ProtocolException;
import ch.boye.httpclientandroidlib.annotation.Immutable;
import ch.boye.httpclientandroidlib.client.CircularRedirectException;
import ch.boye.httpclientandroidlib.client.RedirectHandler;
import ch.boye.httpclientandroidlib.client.methods.HttpGet;
import ch.boye.httpclientandroidlib.client.methods.HttpHead;
import ch.boye.httpclientandroidlib.client.params.ClientPNames;
import ch.boye.httpclientandroidlib.client.utils.URIUtils;
import ch.boye.httpclientandroidlib.params.HttpParams;
import ch.boye.httpclientandroidlib.protocol.ExecutionContext;
import ch.boye.httpclientandroidlib.protocol.HttpContext;
import ch.boye.httpclientandroidlib.util.Args;
import ch.boye.httpclientandroidlib.util.Asserts;
/**
* Default implementation of {@link RedirectHandler}.
*
* @since 4.0
*
* @deprecated (4.1) use {@link DefaultRedirectStrategy}.
*/
@Immutable
@Deprecated
public class DefaultRedirectHandler implements RedirectHandler {
public HttpClientAndroidLog log = new HttpClientAndroidLog(getClass());
private static final String REDIRECT_LOCATIONS = "http.protocol.redirect-locations";
public DefaultRedirectHandler() {
super();
}
public boolean isRedirectRequested(
final HttpResponse response,
final HttpContext context) {
Args.notNull(response, "HTTP response");
final int statusCode = response.getStatusLine().getStatusCode();
switch (statusCode) {
case HttpStatus.SC_MOVED_TEMPORARILY:
case HttpStatus.SC_MOVED_PERMANENTLY:
case HttpStatus.SC_TEMPORARY_REDIRECT:
final HttpRequest request = (HttpRequest) context.getAttribute(
ExecutionContext.HTTP_REQUEST);
final String method = request.getRequestLine().getMethod();
return method.equalsIgnoreCase(HttpGet.METHOD_NAME)
|| method.equalsIgnoreCase(HttpHead.METHOD_NAME);
case HttpStatus.SC_SEE_OTHER:
return true;
default:
return false;
} //end of switch
}
public URI getLocationURI(
final HttpResponse response,
final HttpContext context) throws ProtocolException {
Args.notNull(response, "HTTP response");
//get the location header to find out where to redirect to
final Header locationHeader = response.getFirstHeader("location");
if (locationHeader == null) {
// got a redirect response, but no location header
throw new ProtocolException(
"Received redirect response " + response.getStatusLine()
+ " but no location header");
}
final String location = locationHeader.getValue();
if (this.log.isDebugEnabled()) {
this.log.debug("Redirect requested to location '" + location + "'");
}
URI uri;
try {
uri = new URI(location);
} catch (final URISyntaxException ex) {
throw new ProtocolException("Invalid redirect URI: " + location, ex);
}
final HttpParams params = response.getParams();
// rfc2616 demands the location value be a complete URI
// Location = "Location" ":" absoluteURI
if (!uri.isAbsolute()) {
if (params.isParameterTrue(ClientPNames.REJECT_RELATIVE_REDIRECT)) {
throw new ProtocolException("Relative redirect location '"
+ uri + "' not allowed");
}
// Adjust location URI
final HttpHost target = (HttpHost) context.getAttribute(
ExecutionContext.HTTP_TARGET_HOST);
Asserts.notNull(target, "Target host");
final HttpRequest request = (HttpRequest) context.getAttribute(
ExecutionContext.HTTP_REQUEST);
try {
final URI requestURI = new URI(request.getRequestLine().getUri());
final URI absoluteRequestURI = URIUtils.rewriteURI(requestURI, target, true);
uri = URIUtils.resolve(absoluteRequestURI, uri);
} catch (final URISyntaxException ex) {
throw new ProtocolException(ex.getMessage(), ex);
}
}
if (params.isParameterFalse(ClientPNames.ALLOW_CIRCULAR_REDIRECTS)) {
RedirectLocations redirectLocations = (RedirectLocations) context.getAttribute(
REDIRECT_LOCATIONS);
if (redirectLocations == null) {
redirectLocations = new RedirectLocations();
context.setAttribute(REDIRECT_LOCATIONS, redirectLocations);
}
final URI redirectURI;
if (uri.getFragment() != null) {
try {
final HttpHost target = new HttpHost(
uri.getHost(),
uri.getPort(),
uri.getScheme());
redirectURI = URIUtils.rewriteURI(uri, target, true);
} catch (final URISyntaxException ex) {
throw new ProtocolException(ex.getMessage(), ex);
}
} else {
redirectURI = uri;
}
if (redirectLocations.contains(redirectURI)) {
throw new CircularRedirectException("Circular redirect to '" +
redirectURI + "'");
} else {
redirectLocations.add(redirectURI);
}
}
return uri;
}
}
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