View Javadoc

    1   /* HttpRecorderPostMethod
    2    *
    3    * Created on Feb 24, 2004
    4    *
    5    * Copyright (C) 2003 Internet Archive.
    6    *
    7    * This file is part of the Heritrix web crawler (crawler.archive.org).
    8    *
    9    * Heritrix is free software; you can redistribute it and/or modify
    10   * it under the terms of the GNU Lesser Public License as published by
    11   * the Free Software Foundation; either version 2.1 of the License, or
    12   * any later version.
    13   *
    14   * Heritrix is distributed in the hope that it will be useful,
    15   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    16   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    17   * GNU Lesser Public License for more details.
    18   *
    19   * You should have received a copy of the GNU Lesser Public License
    20   * along with Heritrix; if not, write to the Free Software
    21   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    22   */
    23  package org.archive.httpclient;
    24
    25  import java.io.IOException;
    26
    27  import org.apache.commons.httpclient.HttpConnection;
    28  import org.apache.commons.httpclient.HttpException;
    29  import org.apache.commons.httpclient.HttpState;
    30  import org.apache.commons.httpclient.methods.PostMethod;
    31  import org.archive.util.HttpRecorder;
    32
    33
    34  /***
    35   * Override of PostMethod that marks the passed HttpRecorder w/ the transition
    36   * from HTTP head to body and that forces a close on the responseConnection.
    37   *
    38   * This is a copy of {@link HttpRecorderGetMethod}.  Only difference is the
    39   * parent subclass.
    40   *
    41   * @author stack
    42   * @version $Date: 2005-04-07 21:44:47 +0000 (Thu, 07 Apr 2005) $ $Revision: 3351 $
    43   */
    44  public class HttpRecorderPostMethod extends PostMethod {
    45      /***
    46       * Instance of http recorder method.
    47       */
    48      protected HttpRecorderMethod httpRecorderMethod = null;
    49
    50
    51      public HttpRecorderPostMethod(String uri, HttpRecorder recorder) {
    52          super(uri);
    53          this.httpRecorderMethod = new HttpRecorderMethod(recorder);
    54      }
    55
    56      protected void readResponseBody(HttpState state, HttpConnection connection)
    57              throws IOException, HttpException {
    58          // We're about to read the body.  Mark transition in http recorder.
    59          this.httpRecorderMethod.markContentBegin(connection);
    60          super.readResponseBody(state, connection);
    61      }
    62
    63      protected boolean shouldCloseConnection(HttpConnection conn) {
    64          // Always close connection after each request. As best I can tell, this
    65          // is superfluous -- we've set our client to be HTTP/1.0.  Doing this
    66          // out of paranoia.
    67          return true;
    68      }
    69
    70      public int execute(HttpState state, HttpConnection conn)
    71              throws HttpException, IOException {
    72          // Save off the connection so we can close it on our way out in case
    73          // httpclient fails to (We're not supposed to have access to the
    74          // underlying connection object; am only violating contract because
    75          // see cases where httpclient is skipping out w/o cleaning up
    76          // after itself).
    77          this.httpRecorderMethod.setConnection(conn);
    78          return super.execute(state, conn);
    79      }
    80
    81      protected void addProxyConnectionHeader(HttpState state, HttpConnection conn)
    82              throws IOException, HttpException {
    83          super.addProxyConnectionHeader(state, conn);
    84          this.httpRecorderMethod.handleAddProxyConnectionHeader(this);
    85      }
    86  }