author | chegar |
Mon, 26 Feb 2018 18:18:49 +0000 | |
branch | http-client-branch |
changeset 56186 | 261b5b524dd3 |
parent 56092 | fd85b2bf2b0d |
child 56281 | 7fdd89dabab2 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package jdk.internal.net.http; |
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import java.io.IOException; |
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import java.io.UncheckedIOException; |
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import java.net.URI; |
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import java.net.http.HttpClient; |
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import java.net.http.HttpHeaders; |
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import jdk.internal.net.http.common.Log; |
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import jdk.internal.net.http.common.Utils; |
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class RedirectFilter implements HeaderFilter { |
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HttpRequestImpl request; |
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HttpClientImpl client; |
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HttpClient.Redirect policy; |
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String method; |
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MultiExchange<?> exchange; |
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static final int DEFAULT_MAX_REDIRECTS = 5; |
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URI uri; |
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static final int max_redirects = Utils.getIntegerNetProperty( |
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"jdk.httpclient.redirects.retrylimit", DEFAULT_MAX_REDIRECTS |
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); |
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// A public no-arg constructor is required by FilterFactory |
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public RedirectFilter() {} |
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||
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@Override |
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public synchronized void request(HttpRequestImpl r, MultiExchange<?> e) throws IOException { |
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this.request = r; |
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this.client = e.client(); |
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this.policy = client.followRedirects(); |
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this.method = r.method(); |
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this.uri = r.uri(); |
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this.exchange = e; |
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} |
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@Override |
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public synchronized HttpRequestImpl response(Response r) throws IOException { |
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return handleResponse(r); |
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} |
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/** |
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* Checks to see if a new request is needed and returns it. |
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* Null means response is ok to return to user. |
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*/ |
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private HttpRequestImpl handleResponse(Response r) { |
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int rcode = r.statusCode(); |
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if (rcode == 200 || policy == HttpClient.Redirect.NEVER) { |
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return null; |
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} |
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if (rcode >= 300 && rcode <= 399) { |
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URI redir = getRedirectedURI(r.headers()); |
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Log.logTrace("response code: {0}, redirected URI: {1}", rcode, redir); |
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if (canRedirect(redir) && ++exchange.numberOfRedirects < max_redirects) { |
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Log.logTrace("redirecting to: {0}", redir); |
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return HttpRequestImpl.newInstanceForRedirection(redir, method, request); |
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} else { |
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Log.logTrace("not redirecting"); |
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return null; |
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} |
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} |
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return null; |
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} |
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private URI getRedirectedURI(HttpHeaders headers) { |
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URI redirectedURI; |
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redirectedURI = headers.firstValue("Location") |
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.map(URI::create) |
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.orElseThrow(() -> new UncheckedIOException( |
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new IOException("Invalid redirection"))); |
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// redirect could be relative to original URL, but if not |
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// then redirect is used. |
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redirectedURI = uri.resolve(redirectedURI); |
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return redirectedURI; |
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} |
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private boolean canRedirect(URI redir) { |
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String newScheme = redir.getScheme(); |
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String oldScheme = uri.getScheme(); |
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switch (policy) { |
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case ALWAYS: |
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return true; |
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case NEVER: |
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return false; |
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case SECURE: |
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return newScheme.equalsIgnoreCase(oldScheme) |
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|| newScheme.equalsIgnoreCase("https"); |
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case SAME_PROTOCOL: |
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return newScheme.equalsIgnoreCase(oldScheme); |
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default: |
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throw new InternalError(); |
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} |
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} |
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} |