author | chegar |
Wed, 06 Dec 2017 11:11:59 -0800 | |
changeset 48083 | b1c1b4ef4be2 |
parent 47216 | 71c04702a3d5 |
child 55973 | 4d9b002587db |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2017, 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.incubator.http; |
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import java.io.IOException; |
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import java.net.PasswordAuthentication; |
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import java.net.URI; |
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import java.net.InetSocketAddress; |
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import java.net.URISyntaxException; |
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import java.util.Base64; |
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import java.util.LinkedList; |
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import java.util.Objects; |
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import java.util.WeakHashMap; |
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import jdk.incubator.http.internal.common.Utils; |
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import static java.net.Authenticator.RequestorType.PROXY; |
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import static java.net.Authenticator.RequestorType.SERVER; |
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import static java.nio.charset.StandardCharsets.ISO_8859_1; |
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/** |
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* Implementation of Http Basic authentication. |
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*/ |
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class AuthenticationFilter implements HeaderFilter { |
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volatile MultiExchange<?,?> exchange; |
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private static final Base64.Encoder encoder = Base64.getEncoder(); |
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static final int DEFAULT_RETRY_LIMIT = 3; |
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static final int retry_limit = Utils.getIntegerNetProperty( |
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"jdk.httpclient.auth.retrylimit", DEFAULT_RETRY_LIMIT); |
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static final int UNAUTHORIZED = 401; |
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static final int PROXY_UNAUTHORIZED = 407; |
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// A public no-arg constructor is required by FilterFactory |
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public AuthenticationFilter() {} |
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private PasswordAuthentication getCredentials(String header, |
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boolean proxy, |
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HttpRequestImpl req) |
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throws IOException |
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{ |
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HttpClientImpl client = exchange.client(); |
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java.net.Authenticator auth = |
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client.authenticator() |
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.orElseThrow(() -> new IOException("No authenticator set")); |
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URI uri = req.uri(); |
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HeaderParser parser = new HeaderParser(header); |
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String authscheme = parser.findKey(0); |
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String realm = parser.findValue("realm"); |
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java.net.Authenticator.RequestorType rtype = proxy ? PROXY : SERVER; |
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// needs to be instance method in Authenticator |
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return auth.requestPasswordAuthenticationInstance(uri.getHost(), |
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null, |
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uri.getPort(), |
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uri.getScheme(), |
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realm, |
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authscheme, |
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uri.toURL(), |
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rtype |
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); |
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} |
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private URI getProxyURI(HttpRequestImpl r) { |
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InetSocketAddress proxy = r.proxy(); |
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if (proxy == null) { |
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return null; |
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} |
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// our own private scheme for proxy URLs |
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// eg. proxy.http://host:port/ |
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String scheme = "proxy." + r.uri().getScheme(); |
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try { |
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return new URI(scheme, |
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null, |
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proxy.getHostString(), |
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proxy.getPort(), |
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null, |
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null, |
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null); |
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} catch (URISyntaxException e) { |
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throw new InternalError(e); |
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} |
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} |
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@Override |
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public void request(HttpRequestImpl r, MultiExchange<?,?> e) throws IOException { |
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// use preemptive authentication if an entry exists. |
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Cache cache = getCache(e); |
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this.exchange = e; |
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// Proxy |
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if (exchange.proxyauth == null) { |
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URI proxyURI = getProxyURI(r); |
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if (proxyURI != null) { |
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CacheEntry ca = cache.get(proxyURI, true); |
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if (ca != null) { |
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exchange.proxyauth = new AuthInfo(true, ca.scheme, null, ca); |
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addBasicCredentials(r, true, ca.value); |
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} |
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} |
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} |
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// Server |
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if (exchange.serverauth == null) { |
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CacheEntry ca = cache.get(r.uri(), false); |
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if (ca != null) { |
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exchange.serverauth = new AuthInfo(true, ca.scheme, null, ca); |
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addBasicCredentials(r, false, ca.value); |
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} |
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} |
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} |
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|
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// TODO: refactor into per auth scheme class |
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private static void addBasicCredentials(HttpRequestImpl r, |
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boolean proxy, |
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PasswordAuthentication pw) { |
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String hdrname = proxy ? "Proxy-Authorization" : "Authorization"; |
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StringBuilder sb = new StringBuilder(128); |
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sb.append(pw.getUserName()).append(':').append(pw.getPassword()); |
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String s = encoder.encodeToString(sb.toString().getBytes(ISO_8859_1)); |
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String value = "Basic " + s; |
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r.setSystemHeader(hdrname, value); |
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} |
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149 |
|
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// Information attached to a HttpRequestImpl relating to authentication |
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static class AuthInfo { |
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final boolean fromcache; |
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final String scheme; |
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int retries; |
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PasswordAuthentication credentials; // used in request |
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CacheEntry cacheEntry; // if used |
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|
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AuthInfo(boolean fromcache, |
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String scheme, |
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PasswordAuthentication credentials) { |
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this.fromcache = fromcache; |
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this.scheme = scheme; |
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this.credentials = credentials; |
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this.retries = 1; |
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} |
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|
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AuthInfo(boolean fromcache, |
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String scheme, |
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PasswordAuthentication credentials, |
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CacheEntry ca) { |
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this(fromcache, scheme, credentials); |
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assert credentials == null || (ca != null && ca.value == null); |
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cacheEntry = ca; |
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} |
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|
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AuthInfo retryWithCredentials(PasswordAuthentication pw) { |
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// If the info was already in the cache we need to create a new |
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// instance with fromCache==false so that it's put back in the |
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// cache if authentication succeeds |
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AuthInfo res = fromcache ? new AuthInfo(false, scheme, pw) : this; |
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res.credentials = Objects.requireNonNull(pw); |
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res.retries = retries; |
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return res; |
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184 |
} |
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185 |
|
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} |
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|
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@Override |
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public HttpRequestImpl response(Response r) throws IOException { |
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Cache cache = getCache(exchange); |
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int status = r.statusCode(); |
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HttpHeaders hdrs = r.headers(); |
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HttpRequestImpl req = r.request(); |
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194 |
|
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if (status != UNAUTHORIZED && status != PROXY_UNAUTHORIZED) { |
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// check if any authentication succeeded for first time |
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if (exchange.serverauth != null && !exchange.serverauth.fromcache) { |
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AuthInfo au = exchange.serverauth; |
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cache.store(au.scheme, req.uri(), false, au.credentials); |
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200 |
} |
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if (exchange.proxyauth != null && !exchange.proxyauth.fromcache) { |
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AuthInfo au = exchange.proxyauth; |
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cache.store(au.scheme, req.uri(), false, au.credentials); |
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204 |
} |
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205 |
return null; |
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206 |
} |
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207 |
|
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boolean proxy = status == PROXY_UNAUTHORIZED; |
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String authname = proxy ? "Proxy-Authenticate" : "WWW-Authenticate"; |
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String authval = hdrs.firstValue(authname).orElseThrow(() -> { |
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|
211 |
return new IOException("Invalid auth header"); |
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|
212 |
}); |
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HeaderParser parser = new HeaderParser(authval); |
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String scheme = parser.findKey(0); |
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215 |
|
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216 |
// TODO: Need to generalise from Basic only. Delegate to a provider class etc. |
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217 |
|
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218 |
if (!scheme.equalsIgnoreCase("Basic")) { |
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219 |
return null; // error gets returned to app |
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220 |
} |
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221 |
|
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AuthInfo au = proxy ? exchange.proxyauth : exchange.serverauth; |
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223 |
if (au == null) { |
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224 |
PasswordAuthentication pw = getCredentials(authval, proxy, req); |
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|
225 |
if (pw == null) { |
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226 |
throw new IOException("No credentials provided"); |
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227 |
} |
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228 |
// No authentication in request. Get credentials from user |
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au = new AuthInfo(false, "Basic", pw); |
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|
230 |
if (proxy) { |
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|
231 |
exchange.proxyauth = au; |
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|
232 |
} else { |
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|
233 |
exchange.serverauth = au; |
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|
234 |
} |
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235 |
addBasicCredentials(req, proxy, pw); |
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236 |
return req; |
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237 |
} else if (au.retries > retry_limit) { |
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238 |
throw new IOException("too many authentication attempts. Limit: " + |
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|
239 |
Integer.toString(retry_limit)); |
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|
240 |
} else { |
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|
241 |
// we sent credentials, but they were rejected |
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242 |
if (au.fromcache) { |
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|
243 |
cache.remove(au.cacheEntry); |
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|
244 |
} |
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245 |
// try again |
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246 |
PasswordAuthentication pw = getCredentials(authval, proxy, req); |
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247 |
if (pw == null) { |
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248 |
throw new IOException("No credentials provided"); |
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249 |
} |
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250 |
au = au.retryWithCredentials(pw); |
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|
251 |
if (proxy) { |
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252 |
exchange.proxyauth = au; |
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253 |
} else { |
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254 |
exchange.serverauth = au; |
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255 |
} |
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256 |
addBasicCredentials(req, proxy, au.credentials); |
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|
257 |
au.retries++; |
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258 |
return req; |
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259 |
} |
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} |
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|
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// Use a WeakHashMap to make it possible for the HttpClient to |
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// be garbaged collected when no longer referenced. |
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static final WeakHashMap<HttpClientImpl,Cache> caches = new WeakHashMap<>(); |
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|
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static synchronized Cache getCache(MultiExchange<?,?> exchange) { |
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HttpClientImpl client = exchange.client(); |
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Cache c = caches.get(client); |
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if (c == null) { |
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c = new Cache(); |
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caches.put(client, c); |
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} |
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return c; |
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} |
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|
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// Note: Make sure that Cache and CacheEntry do not keep any strong |
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// reference to the HttpClient: it would prevent the client being |
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// GC'ed when no longer referenced. |
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static class Cache { |
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final LinkedList<CacheEntry> entries = new LinkedList<>(); |
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|
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synchronized CacheEntry get(URI uri, boolean proxy) { |
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for (CacheEntry entry : entries) { |
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if (entry.equalsKey(uri, proxy)) { |
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return entry; |
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} |
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} |
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return null; |
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} |
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|
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synchronized void remove(String authscheme, URI domain, boolean proxy) { |
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for (CacheEntry entry : entries) { |
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if (entry.equalsKey(domain, proxy)) { |
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entries.remove(entry); |
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} |
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} |
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} |
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|
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synchronized void remove(CacheEntry entry) { |
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entries.remove(entry); |
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} |
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|
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synchronized void store(String authscheme, |
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URI domain, |
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boolean proxy, |
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PasswordAuthentication value) { |
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remove(authscheme, domain, proxy); |
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entries.add(new CacheEntry(authscheme, domain, proxy, value)); |
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} |
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} |
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|
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static class CacheEntry { |
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final String root; |
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final String scheme; |
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final boolean proxy; |
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final PasswordAuthentication value; |
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|
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CacheEntry(String authscheme, |
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URI uri, |
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boolean proxy, |
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PasswordAuthentication value) { |
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this.scheme = authscheme; |
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this.root = uri.resolve(".").toString(); // remove extraneous components |
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this.proxy = proxy; |
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this.value = value; |
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} |
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|
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public PasswordAuthentication value() { |
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return value; |
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} |
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|
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public boolean equalsKey(URI uri, boolean proxy) { |
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if (this.proxy != proxy) { |
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return false; |
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} |
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String other = uri.toString(); |
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return other.startsWith(root); |
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} |
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} |
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} |