The Tor Browser / file revision

 /*

  * ====================================================================

  * 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.io;

 import java.io.IOException;

 import java.util.Iterator;

 import ch.boye.httpclientandroidlib.Header;

 import ch.boye.httpclientandroidlib.HttpException;

 import ch.boye.httpclientandroidlib.HttpMessage;

 import ch.boye.httpclientandroidlib.io.HttpMessageWriter;

 import ch.boye.httpclientandroidlib.io.SessionOutputBuffer;

 import ch.boye.httpclientandroidlib.message.LineFormatter;

 import ch.boye.httpclientandroidlib.message.BasicLineFormatter;

 import ch.boye.httpclientandroidlib.params.HttpParams;

 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;

 /**

  * Abstract base class for HTTP message writers that serialize output to

  * an instance of {@link SessionOutputBuffer}.

  *

  * @since 4.0

  */

 public abstract class AbstractMessageWriter implements HttpMessageWriter {

     protected final SessionOutputBuffer sessionBuffer;

     protected final CharArrayBuffer lineBuf;

     protected final LineFormatter lineFormatter;

     /**

      * Creates an instance of AbstractMessageWriter.

      *

      * @param buffer the session output buffer.

      * @param formatter the line formatter.

      * @param params HTTP parameters.

      */

     public AbstractMessageWriter(final SessionOutputBuffer buffer,

                                  final LineFormatter formatter,

                                  final HttpParams params) {

         super();

         if (buffer == null) {

             throw new IllegalArgumentException("Session input buffer may not be null");

         }

         this.sessionBuffer = buffer;

         this.lineBuf = new CharArrayBuffer(128);

         this.lineFormatter = (formatter != null) ?

             formatter : BasicLineFormatter.DEFAULT;

     }

     /**

      * Subclasses must override this method to write out the first header line

      * based on the {@link HttpMessage} passed as a parameter.

      *

      * @param message the message whose first line is to be written out.

      * @throws IOException in case of an I/O error.

      */

     protected abstract void writeHeadLine(HttpMessage message) throws IOException;

     public void write(

             final HttpMessage message) throws IOException, HttpException {

         if (message == null) {

             throw new IllegalArgumentException("HTTP message may not be null");

         }

         writeHeadLine(message);

         for (Iterator it = message.headerIterator(); it.hasNext(); ) {

             Header header = (Header) it.next();

             this.sessionBuffer.writeLine

                 (lineFormatter.formatHeader(this.lineBuf, header));

         }

         this.lineBuf.clear();

         this.sessionBuffer.writeLine(this.lineBuf);

     }

 }