mirror of git://gcc.gnu.org/git/gcc.git
858 lines
25 KiB
Java
858 lines
25 KiB
Java
/* Request.java --
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Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.net.protocol.http;
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import gnu.java.lang.CPStringBuilder;
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import gnu.java.net.LineInputStream;
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import gnu.java.util.Base64;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.net.ProtocolException;
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import java.security.MessageDigest;
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import java.security.NoSuchAlgorithmException;
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import java.text.DateFormat;
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import java.text.ParseException;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Properties;
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import java.util.zip.GZIPInputStream;
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import java.util.zip.InflaterInputStream;
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/**
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* A single HTTP request.
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*
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* @author Chris Burdess (dog@gnu.org)
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*/
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public class Request
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{
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/**
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* The connection context in which this request is invoked.
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*/
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protected final HTTPConnection connection;
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/**
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* The HTTP method to invoke.
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*/
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protected final String method;
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/**
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* The path identifying the resource.
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* This string must conform to the abs_path definition given in RFC2396,
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* with an optional "?query" part, and must be URI-escaped by the caller.
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*/
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protected final String path;
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/**
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* The headers in this request.
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*/
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protected final Headers requestHeaders;
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/**
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* The request body provider.
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*/
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protected RequestBodyWriter requestBodyWriter;
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/**
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* Map of response header handlers.
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*/
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protected Map<String, ResponseHeaderHandler> responseHeaderHandlers;
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/**
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* The authenticator.
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*/
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protected Authenticator authenticator;
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/**
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* Whether this request has been dispatched yet.
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*/
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private boolean dispatched;
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/**
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* Constructor for a new request.
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* @param connection the connection context
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* @param method the HTTP method
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* @param path the resource path including query part
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*/
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protected Request(HTTPConnection connection, String method,
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String path)
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{
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this.connection = connection;
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this.method = method;
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this.path = path;
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requestHeaders = new Headers();
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responseHeaderHandlers = new HashMap<String, ResponseHeaderHandler>();
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}
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/**
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* Returns the connection associated with this request.
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* @see #connection
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*/
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public HTTPConnection getConnection()
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{
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return connection;
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}
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/**
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* Returns the HTTP method to invoke.
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* @see #method
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*/
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public String getMethod()
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{
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return method;
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}
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/**
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* Returns the resource path.
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* @see #path
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*/
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public String getPath()
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{
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return path;
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}
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/**
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* Returns the full request-URI represented by this request, as specified
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* by HTTP/1.1.
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*/
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public String getRequestURI()
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{
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return connection.getURI() + path;
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}
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/**
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* Returns the headers in this request.
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*/
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public Headers getHeaders()
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{
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return requestHeaders;
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}
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/**
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* Returns the value of the specified header in this request.
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* @param name the header name
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*/
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public String getHeader(String name)
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{
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return requestHeaders.getValue(name);
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}
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/**
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* Returns the value of the specified header in this request as an integer.
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* @param name the header name
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*/
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public int getIntHeader(String name)
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{
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return requestHeaders.getIntValue(name);
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}
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/**
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* Returns the value of the specified header in this request as a date.
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* @param name the header name
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*/
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public Date getDateHeader(String name)
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{
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return requestHeaders.getDateValue(name);
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}
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/**
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* Sets the specified header in this request.
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* @param name the header name
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* @param value the header value
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*/
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public void setHeader(String name, String value)
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{
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requestHeaders.put(name, value);
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}
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/**
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* Convenience method to set the entire request body.
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* @param requestBody the request body content
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*/
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public void setRequestBody(byte[] requestBody)
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{
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setRequestBodyWriter(new ByteArrayRequestBodyWriter(requestBody));
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}
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/**
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* Sets the request body provider.
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* @param requestBodyWriter the handler used to obtain the request body
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*/
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public void setRequestBodyWriter(RequestBodyWriter requestBodyWriter)
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{
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this.requestBodyWriter = requestBodyWriter;
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}
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/**
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* Sets a callback handler to be invoked for the specified header name.
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* @param name the header name
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* @param handler the handler to receive the value for the header
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*/
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public void setResponseHeaderHandler(String name,
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ResponseHeaderHandler handler)
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{
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responseHeaderHandlers.put(name, handler);
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}
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/**
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* Sets an authenticator that can be used to handle authentication
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* automatically.
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* @param authenticator the authenticator
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*/
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public void setAuthenticator(Authenticator authenticator)
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{
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this.authenticator = authenticator;
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}
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/**
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* Dispatches this request.
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* A request can only be dispatched once; calling this method a second
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* time results in a protocol exception.
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* @exception IOException if an I/O error occurred
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* @return an HTTP response object representing the result of the operation
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*/
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public Response dispatch()
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throws IOException
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{
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if (dispatched)
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{
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throw new ProtocolException("request already dispatched");
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}
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final String CRLF = "\r\n";
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final String HEADER_SEP = ": ";
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final String US_ASCII = "US-ASCII";
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final String version = connection.getVersion();
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Response response;
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int contentLength = -1;
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boolean retry = false;
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int attempts = 0;
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boolean expectingContinue = false;
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if (requestBodyWriter != null)
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{
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contentLength = requestBodyWriter.getContentLength();
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String expect = getHeader("Expect");
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if (expect != null && expect.equals("100-continue"))
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{
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expectingContinue = true;
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}
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else
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{
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setHeader("Content-Length", Integer.toString(contentLength));
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}
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}
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try
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{
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// Loop while authentication fails or continue
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do
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{
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retry = false;
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// Get socket output and input streams
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OutputStream out = connection.getOutputStream();
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// Request line
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String requestUri = path;
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if (connection.isUsingProxy() &&
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!"*".equals(requestUri) &&
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!"CONNECT".equals(method))
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{
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requestUri = getRequestURI();
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}
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String line = method + ' ' + requestUri + ' ' + version + CRLF;
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out.write(line.getBytes(US_ASCII));
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// Request headers
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for (Headers.HeaderElement elt : requestHeaders)
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{
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line = elt.name + HEADER_SEP + elt.value + CRLF;
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out.write(line.getBytes(US_ASCII));
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}
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out.write(CRLF.getBytes(US_ASCII));
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// Request body
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if (requestBodyWriter != null && !expectingContinue)
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{
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byte[] buffer = new byte[4096];
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int len;
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int count = 0;
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requestBodyWriter.reset();
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do
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{
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len = requestBodyWriter.write(buffer);
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if (len > 0)
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{
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out.write(buffer, 0, len);
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}
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count += len;
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}
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while (len > -1 && count < contentLength);
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}
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out.flush();
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// Get response
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while(true)
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{
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response = readResponse(connection.getInputStream());
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int sc = response.getCode();
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if (sc == 401 && authenticator != null)
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{
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if (authenticate(response, attempts++))
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{
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retry = true;
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}
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}
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else if (sc == 100)
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{
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if (expectingContinue)
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{
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requestHeaders.remove("Expect");
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setHeader("Content-Length",
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Integer.toString(contentLength));
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expectingContinue = false;
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retry = true;
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}
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else
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{
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// A conforming server can send an unsoliceted
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// Continue response but *should* not (RFC 2616
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// sec 8.2.3). Ignore the bogus Continue
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// response and get the real response that
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// should follow
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continue;
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}
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}
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break;
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}
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}
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while (retry);
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}
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catch (IOException e)
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{
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connection.close();
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throw e;
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}
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return response;
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}
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Response readResponse(InputStream in)
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throws IOException
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{
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String line;
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int len;
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// Read response status line
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LineInputStream lis = new LineInputStream(in);
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line = lis.readLine();
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if (line == null)
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{
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throw new ProtocolException("Peer closed connection");
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}
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if (!line.startsWith("HTTP/"))
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{
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throw new ProtocolException(line);
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}
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len = line.length();
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int start = 5, end = 6;
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while (line.charAt(end) != '.')
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{
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end++;
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}
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int majorVersion = Integer.parseInt(line.substring(start, end));
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start = end + 1;
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end = start + 1;
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while (line.charAt(end) != ' ')
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{
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end++;
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}
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int minorVersion = Integer.parseInt(line.substring(start, end));
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start = end + 1;
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end = start + 3;
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int code = Integer.parseInt(line.substring(start, end));
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String message = line.substring(end + 1, len - 1);
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// Read response headers
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Headers responseHeaders = new Headers();
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responseHeaders.parse(lis);
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notifyHeaderHandlers(responseHeaders);
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InputStream body = null;
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switch (code)
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{
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case 100:
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break;
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case 204:
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case 205:
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case 304:
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body = createResponseBodyStream(responseHeaders, majorVersion,
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minorVersion, in, false);
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break;
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default:
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body = createResponseBodyStream(responseHeaders, majorVersion,
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minorVersion, in, true);
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}
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// Construct response
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Response ret = new Response(majorVersion, minorVersion, code,
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message, responseHeaders, body);
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return ret;
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}
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void notifyHeaderHandlers(Headers headers)
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{
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for (Headers.HeaderElement entry : headers)
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{
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// Handle Set-Cookie
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if ("Set-Cookie".equalsIgnoreCase(entry.name))
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handleSetCookie(entry.value);
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ResponseHeaderHandler handler =
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(ResponseHeaderHandler) responseHeaderHandlers.get(entry.name);
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if (handler != null)
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handler.setValue(entry.value);
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}
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}
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private InputStream createResponseBodyStream(Headers responseHeaders,
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int majorVersion,
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int minorVersion,
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InputStream in,
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boolean mayHaveBody)
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throws IOException
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{
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long contentLength = -1;
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// Persistent connections are the default in HTTP/1.1
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boolean doClose = "close".equalsIgnoreCase(getHeader("Connection")) ||
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"close".equalsIgnoreCase(responseHeaders.getValue("Connection")) ||
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(connection.majorVersion == 1 && connection.minorVersion == 0) ||
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(majorVersion == 1 && minorVersion == 0);
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String transferCoding = responseHeaders.getValue("Transfer-Encoding");
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if ("HEAD".equals(method) || !mayHaveBody)
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{
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// Special case no body.
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in = new LimitedLengthInputStream(in, 0, true, connection, doClose);
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}
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else if ("chunked".equalsIgnoreCase(transferCoding))
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{
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in = new LimitedLengthInputStream(in, -1, false, connection, doClose);
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in = new ChunkedInputStream(in, responseHeaders);
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}
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else
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{
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contentLength = responseHeaders.getLongValue("Content-Length");
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if (contentLength < 0)
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doClose = true; // No Content-Length, must close.
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in = new LimitedLengthInputStream(in, contentLength,
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contentLength >= 0,
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connection, doClose);
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}
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String contentCoding = responseHeaders.getValue("Content-Encoding");
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if (contentCoding != null && !"identity".equals(contentCoding))
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{
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if ("gzip".equals(contentCoding))
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{
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in = new GZIPInputStream(in);
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}
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else if ("deflate".equals(contentCoding))
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{
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in = new InflaterInputStream(in);
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}
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else
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{
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throw new ProtocolException("Unsupported Content-Encoding: " +
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contentCoding);
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}
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// Remove the Content-Encoding header because the content is
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// no longer compressed.
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responseHeaders.remove("Content-Encoding");
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}
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return in;
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}
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boolean authenticate(Response response, int attempts)
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throws IOException
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{
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String challenge = response.getHeader("WWW-Authenticate");
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if (challenge == null)
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{
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challenge = response.getHeader("Proxy-Authenticate");
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}
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int si = challenge.indexOf(' ');
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String scheme = (si == -1) ? challenge : challenge.substring(0, si);
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if ("Basic".equalsIgnoreCase(scheme))
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{
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Properties params = parseAuthParams(challenge.substring(si + 1));
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String realm = params.getProperty("realm");
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Credentials creds = authenticator.getCredentials(realm, attempts);
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String userPass = creds.getUsername() + ':' + creds.getPassword();
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byte[] b_userPass = userPass.getBytes("US-ASCII");
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byte[] b_encoded = Base64.encode(b_userPass).getBytes("US-ASCII");
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String authorization =
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scheme + " " + new String(b_encoded, "US-ASCII");
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setHeader("Authorization", authorization);
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return true;
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}
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else if ("Digest".equalsIgnoreCase(scheme))
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{
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Properties params = parseAuthParams(challenge.substring(si + 1));
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String realm = params.getProperty("realm");
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String nonce = params.getProperty("nonce");
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String qop = params.getProperty("qop");
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String algorithm = params.getProperty("algorithm");
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String digestUri = getRequestURI();
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Credentials creds = authenticator.getCredentials(realm, attempts);
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String username = creds.getUsername();
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String password = creds.getPassword();
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connection.incrementNonce(nonce);
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try
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{
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MessageDigest md5 = MessageDigest.getInstance("MD5");
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final byte[] COLON = { 0x3a };
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// Calculate H(A1)
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md5.reset();
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md5.update(username.getBytes("US-ASCII"));
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md5.update(COLON);
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md5.update(realm.getBytes("US-ASCII"));
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md5.update(COLON);
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md5.update(password.getBytes("US-ASCII"));
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byte[] ha1 = md5.digest();
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if ("md5-sess".equals(algorithm))
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{
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byte[] cnonce = generateNonce();
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md5.reset();
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md5.update(ha1);
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md5.update(COLON);
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md5.update(nonce.getBytes("US-ASCII"));
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md5.update(COLON);
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md5.update(cnonce);
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ha1 = md5.digest();
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}
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String ha1Hex = toHexString(ha1);
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// Calculate H(A2)
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md5.reset();
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md5.update(method.getBytes("US-ASCII"));
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md5.update(COLON);
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md5.update(digestUri.getBytes("US-ASCII"));
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if ("auth-int".equals(qop))
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{
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byte[] hEntity = null; // TODO hash of entity body
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md5.update(COLON);
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md5.update(hEntity);
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}
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byte[] ha2 = md5.digest();
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String ha2Hex = toHexString(ha2);
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// Calculate response
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md5.reset();
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|
md5.update(ha1Hex.getBytes("US-ASCII"));
|
|
md5.update(COLON);
|
|
md5.update(nonce.getBytes("US-ASCII"));
|
|
if ("auth".equals(qop) || "auth-int".equals(qop))
|
|
{
|
|
String nc = getNonceCount(nonce);
|
|
byte[] cnonce = generateNonce();
|
|
md5.update(COLON);
|
|
md5.update(nc.getBytes("US-ASCII"));
|
|
md5.update(COLON);
|
|
md5.update(cnonce);
|
|
md5.update(COLON);
|
|
md5.update(qop.getBytes("US-ASCII"));
|
|
}
|
|
md5.update(COLON);
|
|
md5.update(ha2Hex.getBytes("US-ASCII"));
|
|
String digestResponse = toHexString(md5.digest());
|
|
|
|
String authorization = scheme +
|
|
" username=\"" + username + "\"" +
|
|
" realm=\"" + realm + "\"" +
|
|
" nonce=\"" + nonce + "\"" +
|
|
" uri=\"" + digestUri + "\"" +
|
|
" response=\"" + digestResponse + "\"";
|
|
setHeader("Authorization", authorization);
|
|
return true;
|
|
}
|
|
catch (NoSuchAlgorithmException e)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
// Scheme not recognised
|
|
return false;
|
|
}
|
|
|
|
Properties parseAuthParams(String text)
|
|
{
|
|
int len = text.length();
|
|
String key = null;
|
|
CPStringBuilder buf = new CPStringBuilder();
|
|
Properties ret = new Properties();
|
|
boolean inQuote = false;
|
|
for (int i = 0; i < len; i++)
|
|
{
|
|
char c = text.charAt(i);
|
|
if (c == '"')
|
|
{
|
|
inQuote = !inQuote;
|
|
}
|
|
else if (c == '=' && key == null)
|
|
{
|
|
key = buf.toString().trim();
|
|
buf.setLength(0);
|
|
}
|
|
else if (c == ' ' && !inQuote)
|
|
{
|
|
String value = unquote(buf.toString().trim());
|
|
ret.put(key, value);
|
|
key = null;
|
|
buf.setLength(0);
|
|
}
|
|
else if (c != ',' || (i <(len - 1) && text.charAt(i + 1) != ' '))
|
|
{
|
|
buf.append(c);
|
|
}
|
|
}
|
|
if (key != null)
|
|
{
|
|
String value = unquote(buf.toString().trim());
|
|
ret.put(key, value);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
String unquote(String text)
|
|
{
|
|
int len = text.length();
|
|
if (len > 0 && text.charAt(0) == '"' && text.charAt(len - 1) == '"')
|
|
{
|
|
return text.substring(1, len - 1);
|
|
}
|
|
return text;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of times the specified nonce value has been seen.
|
|
* This always returns an 8-byte 0-padded hexadecimal string.
|
|
*/
|
|
String getNonceCount(String nonce)
|
|
{
|
|
int nc = connection.getNonceCount(nonce);
|
|
String hex = Integer.toHexString(nc);
|
|
CPStringBuilder buf = new CPStringBuilder();
|
|
for (int i = 8 - hex.length(); i > 0; i--)
|
|
{
|
|
buf.append('0');
|
|
}
|
|
buf.append(hex);
|
|
return buf.toString();
|
|
}
|
|
|
|
/**
|
|
* Client nonce value.
|
|
*/
|
|
byte[] nonce;
|
|
|
|
/**
|
|
* Generates a new client nonce value.
|
|
*/
|
|
byte[] generateNonce()
|
|
throws IOException, NoSuchAlgorithmException
|
|
{
|
|
if (nonce == null)
|
|
{
|
|
long time = System.currentTimeMillis();
|
|
MessageDigest md5 = MessageDigest.getInstance("MD5");
|
|
md5.update(Long.toString(time).getBytes("US-ASCII"));
|
|
nonce = md5.digest();
|
|
}
|
|
return nonce;
|
|
}
|
|
|
|
String toHexString(byte[] bytes)
|
|
{
|
|
char[] ret = new char[bytes.length * 2];
|
|
for (int i = 0, j = 0; i < bytes.length; i++)
|
|
{
|
|
int c =(int) bytes[i];
|
|
if (c < 0)
|
|
{
|
|
c += 0x100;
|
|
}
|
|
ret[j++] = Character.forDigit(c / 0x10, 0x10);
|
|
ret[j++] = Character.forDigit(c % 0x10, 0x10);
|
|
}
|
|
return new String(ret);
|
|
}
|
|
|
|
/**
|
|
* Parse the specified cookie list and notify the cookie manager.
|
|
*/
|
|
void handleSetCookie(String text)
|
|
{
|
|
CookieManager cookieManager = connection.getCookieManager();
|
|
if (cookieManager == null)
|
|
{
|
|
return;
|
|
}
|
|
String name = null;
|
|
String value = null;
|
|
String comment = null;
|
|
String domain = connection.getHostName();
|
|
String path = this.path;
|
|
int lsi = path.lastIndexOf('/');
|
|
if (lsi != -1)
|
|
{
|
|
path = path.substring(0, lsi);
|
|
}
|
|
boolean secure = false;
|
|
Date expires = null;
|
|
|
|
int len = text.length();
|
|
String attr = null;
|
|
CPStringBuilder buf = new CPStringBuilder();
|
|
boolean inQuote = false;
|
|
for (int i = 0; i <= len; i++)
|
|
{
|
|
char c =(i == len) ? '\u0000' : text.charAt(i);
|
|
if (c == '"')
|
|
{
|
|
inQuote = !inQuote;
|
|
}
|
|
else if (!inQuote)
|
|
{
|
|
if (c == '=' && attr == null)
|
|
{
|
|
attr = buf.toString().trim();
|
|
buf.setLength(0);
|
|
}
|
|
else if (c == ';' || i == len || c == ',')
|
|
{
|
|
String val = unquote(buf.toString().trim());
|
|
if (name == null)
|
|
{
|
|
name = attr;
|
|
value = val;
|
|
}
|
|
else if ("Comment".equalsIgnoreCase(attr))
|
|
{
|
|
comment = val;
|
|
}
|
|
else if ("Domain".equalsIgnoreCase(attr))
|
|
{
|
|
domain = val;
|
|
}
|
|
else if ("Path".equalsIgnoreCase(attr))
|
|
{
|
|
path = val;
|
|
}
|
|
else if ("Secure".equalsIgnoreCase(val))
|
|
{
|
|
secure = true;
|
|
}
|
|
else if ("Max-Age".equalsIgnoreCase(attr))
|
|
{
|
|
int delta = Integer.parseInt(val);
|
|
Calendar cal = Calendar.getInstance();
|
|
cal.setTimeInMillis(System.currentTimeMillis());
|
|
cal.add(Calendar.SECOND, delta);
|
|
expires = cal.getTime();
|
|
}
|
|
else if ("Expires".equalsIgnoreCase(attr))
|
|
{
|
|
DateFormat dateFormat = new HTTPDateFormat();
|
|
try
|
|
{
|
|
expires = dateFormat.parse(val);
|
|
}
|
|
catch (ParseException e)
|
|
{
|
|
// if this isn't a valid date, it may be that
|
|
// the value was returned unquoted; in that case, we
|
|
// want to continue buffering the value
|
|
buf.append(c);
|
|
continue;
|
|
}
|
|
}
|
|
attr = null;
|
|
buf.setLength(0);
|
|
// case EOL
|
|
if (i == len || c == ',')
|
|
{
|
|
Cookie cookie = new Cookie(name, value, comment, domain,
|
|
path, secure, expires);
|
|
cookieManager.setCookie(cookie);
|
|
}
|
|
if (c == ',')
|
|
{
|
|
// Reset cookie fields
|
|
name = null;
|
|
value = null;
|
|
comment = null;
|
|
domain = connection.getHostName();
|
|
path = this.path;
|
|
if (lsi != -1)
|
|
{
|
|
path = path.substring(0, lsi);
|
|
}
|
|
secure = false;
|
|
expires = null;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
buf.append(c);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
buf.append(c);
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|