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From jsde...@apache.org
Subject cvs commit: jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart FilePart.java Part.java StringPart.java
Date Tue, 01 Oct 2002 19:13:42 GMT
jsdever     2002/10/01 12:13:42

  Added:       httpclient/src/java/org/apache/commons/httpclient/methods
                        MultipartPostMethod.java
               httpclient/src/java/org/apache/commons/httpclient/methods/multipart
                        FilePart.java Part.java StringPart.java
  Log:
  Add multipart POST support.
  
  Added a new class methods/MultiPartPost and some related classes in the
  methods/multipart package.
  
  http://www.mail-archive.com/commons-dev@jakarta.apache.org/msg01701.html
  http://nagoya.apache.org/bugzilla/show_bug.cgi?id=13165
  
  Contributed by: Matthew Albright
  
  Revision  Changes    Path
  1.1                  jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/MultipartPostMethod.java
  
  Index: MultipartPostMethod.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/MultipartPostMethod.java,v
1.1 2002/10/01 19:13:41 jsdever Exp $
   * $Revision: 1.1 $
   * $Date: 2002/10/01 19:13:41 $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 1992 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "HttpClient", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * 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/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */
  
  package org.apache.commons.httpclient.methods;
  
  import java.util.List;
  import java.util.ArrayList;
  import java.util.Iterator;
  import java.io.File;
  import java.io.OutputStream;
  import java.io.IOException;
  import java.io.FileNotFoundException;
  import org.apache.commons.httpclient.*;
  import org.apache.commons.httpclient.methods.multipart.*;
  
  /**
   * POST Method for Multipart encoded forms.
   *
   * @author <a href="mailto:mattalbright@yahoo.com">Matthew Albright</a>
   * @author <a href="mailto:jsdever@apache.org">Jeff Dever</a>
   *
   * @since 2.0
   */
  public class MultipartPostMethod extends GetMethod {
  
      private List parameters = new ArrayList();
  
      /**
       * No-arg constructor.
       */
      public MultipartPostMethod() {
          super();
      }
  
      /**
       * Path-setting constructor.
       * @param path the path to request
       */
      public MultipartPostMethod(String path) {
          super(path);
      }
  
      /**
       * Constructor.
       * @param path the path to request
       * @param tempDir directory to store temp files in
       */
      public MultipartPostMethod(String path, String tempDir) {
          super(path, tempDir);
      }
  
      /**
       * Constructor.
       * @param path the path to request
       * @param tempDir directory to store temp files in
       * @param tempFile file to store temporary data in
       */
      public MultipartPostMethod(String path, String tempDir, String tempFile) {
          super(path, tempDir, tempFile);
      }
  
  
      /**
       * Returns <tt>"POST"</tt>.
       * @return <tt>"POST"</tt>
       */
      public String getName() {
          return "POST";
      }
  
      /**
       * Clear my request body.
       */
      public void recycle() {
          super.recycle();
          parameters.clear();
      }
  
  
      public void addParameter(String parameterName, String parameterValue) {
          Part param = new StringPart(parameterName, parameterValue);
          parameters.add(param);
      }
  
  
      public void addParameter(String parameterName, File parameterFile) 
      throws FileNotFoundException {
          Part param = new FilePart(parameterName, parameterFile);
          parameters.add(param);
      }
  
  
      protected void addRequestHeaders(HttpState state, HttpConnection conn) 
      throws IOException, HttpException {
          super.addRequestHeaders(state,conn);
          
          if (! parameters.isEmpty()) 
          {
              setRequestHeader("Content-Type", 
                   "multipart/form-data; boundary=" + Part.getBoundary());
          }
      }
  
      /**
       * Override method of {@link HttpMethodBase}
       * to write request parameters as the
       * request body.
       */
      protected boolean writeRequestBody(HttpState state, HttpConnection conn) 
      throws IOException, HttpException {
          OutputStream out = conn.getRequestOutputStream();
          
          for (Iterator it = parameters.iterator(); it.hasNext();) {
              Part part = (Part)it.next();
              part.send(out);
          }
          
          Part.sendLastBoundary(out);
          
          out.close();
              
          return true;
      }
  
      /**
       * Override method of {@link HttpMethodBase}
       * to return the length of the request body.
       *
       * Once this method has been invoked,
       * the request parameters cannot be altered
       * until I am {@link #recycle recycled}.
       */
      protected int getRequestContentLength() {
          long length = 0;
          
          try {
              for (Iterator it = parameters.iterator(); it.hasNext();) {
                  Part part = (Part)it.next();
              
                  length += part.length();
              }
              length += Part.lengthOfLastBoundary();
  
          } catch (IOException e) {
              // Can't throw an IOException and still override
              throw new RuntimeException(e.toString());
          }
          
          // Chop the length to the max int value.
          if (length <= Integer.MAX_VALUE) {
              return((new Long(length)).intValue());
          } else {
              return(Integer.MAX_VALUE);
          }
      }
  }
  
  
  
  1.1                  jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/FilePart.java
  
  Index: FilePart.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/FilePart.java,v
1.1 2002/10/01 19:13:41 jsdever Exp $
   * $Revision: 1.1 $
   * $Date: 2002/10/01 19:13:41 $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "HttpClient", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * 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/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */
  
  package org.apache.commons.httpclient.methods.multipart;
  
  import java.io.File;
  import java.io.FileInputStream;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.io.FileNotFoundException;
  import java.io.IOException;
  
  
  /**
   * This class implements a part of a Multipart post object that
   * consists of a file.  
   *
   * It makes every effort to not parse or store
   * any of the data in the file, in order to not munge a binary file,
   * and to not break if the file is huge.  Hence, use a simple byte
   * array, and just shove it down the OutputStream.
   *
   * @author <a href="mailto:mattalbright@yahoo.com">Matthew Albright</a>
   * @author <a href="mailto:jsdever@apache.org">Jeff Dever</a>
   * 
   * @since 2.0
   *
   */
  public class FilePart extends Part {
  
      //TODO: make this configurable
      static int MAX_BUFF_SIZE = 1 * 1024 * 1024;  // 1 MiBs
      
      private String name;
      private File file;
      private int buff_size;
      
      
      /**
       * Constructor.
       *
       * @param name
       * @param file the file to post
       *
       * @throws FileNotFoundException if the <i>file</i> is not is normal
       * file or if it is not readable.
       */
      public FilePart(String name, File file) 
      throws FileNotFoundException {
          if (! file.isFile()) {
              throw new FileNotFoundException("File is not a normal file.");
          }
      
          if (! file.canRead()) {
              throw new FileNotFoundException("File is not readable.");
          }
      
          this.name = name;
          this.file = file;
      }
      
      protected void sendHeader(OutputStream out) 
      throws IOException {
          super.sendHeader(out);
          sendFilename(out);
          sendContentType(out);
      }
      
      protected void sendFilename(OutputStream out) 
      throws IOException {
          String filename = "; filename=\"" + file.getName() + "\"";
          out.write(filename.getBytes());
      }
  
      
      protected void sendContentType(OutputStream out) 
      throws IOException {
          out.write(CRLF_bytes);
          out.write("Content-Type: application/octet-stream".getBytes());
      }    
  
      public String getName() { 
          return name; 
      }
      
      protected void sendData(OutputStream out) 
      throws IOException {
          byte[] buff;
          
          if (lengthOfData() > MAX_BUFF_SIZE) {
              buff = new byte[MAX_BUFF_SIZE];
          } else {
              buff = new byte[(new Long(lengthOfData())).intValue()];
          }
          
          InputStream in;
          
          try {
              in = new FileInputStream(file);
          
              int len;
  
              while ((len = in.read(buff)) != -1)
              {
                  out.write(buff, 0, len);
              }
          } catch (FileNotFoundException e) {
              throw new IOException(e.toString());
          }
      }
      
      protected long lengthOfData() 
      throws IOException {
          return file.length();
      }
  }
  
  
  
  
  1.1                  jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/Part.java
  
  Index: Part.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/Part.java,v
1.1 2002/10/01 19:13:41 jsdever Exp $
   * $Revision: 1.1 $
   * $Date: 2002/10/01 19:13:41 $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "HttpClient", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * 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/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */
  
  package org.apache.commons.httpclient.methods.multipart;
  
  import java.io.OutputStream;
  import java.io.ByteArrayOutputStream;
  import java.io.IOException;
  
  /**
   * Abstract class for one Part of a multipart post object.
   *
   * @author <a href="mailto:mattalbright@yahoo.com">Matthew Albright</a>
   * @author <a href="mailto:jsdever@apache.org">Jeff Dever</a>
   *
   * @since 2.0
   */
  public abstract class Part {
  
      static String boundary = "----------------314159265358979323846";
      static byte[] boundary_bytes = boundary.getBytes();
      static String CRLF = "\r\n";
      static byte[] CRLF_bytes = CRLF.getBytes();
      static String extra = "--";
      static byte[] extra_bytes = extra.getBytes();
      
      public static String getBoundary() {
          return boundary;
      }
      
      public static void sendLastBoundary(OutputStream out)
      throws IOException {
          out.write(extra_bytes);
          out.write(boundary_bytes);
          out.write(extra_bytes);
          out.write(CRLF_bytes);
      }
      
      public static int lengthOfLastBoundary()
      throws IOException {
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          
          sendLastBoundary(out);
          
          return(out.size());
      }
      
      public abstract String getName();
      
      protected void sendStart(OutputStream out) 
      throws IOException {
          out.write(extra_bytes);
          out.write(boundary_bytes);
          out.write(CRLF_bytes);
      }
      
      protected int lengthOfStart()
      throws IOException {
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          sendStart(out);
          return(out.size());
      }
      
      protected void sendHeader(OutputStream out) 
      throws IOException {
          String content_dispos = "Content-Disposition: form-data; name=\"" 
              + getName() + "\"";
      
          out.write(content_dispos.getBytes());
      }
      
      protected int lengthOfHeader()
      throws IOException {
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          sendHeader(out);
          return(out.size());
      }
      
      
      protected void sendEndOfHeader(OutputStream out) 
      throws IOException {
          out.write(CRLF_bytes);
          out.write(CRLF_bytes);
      }
      
      protected int lengthOfEndOfHeader()
      throws IOException {
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          sendEndOfHeader(out);
          return out.size();
      }
      
      
      protected abstract void sendData(OutputStream out) throws IOException;
      
      protected abstract long lengthOfData() throws IOException;
      
      protected void sendEnd(OutputStream out) 
      throws IOException {
          out.write(CRLF_bytes);
      }
      
      protected int lengthOfEnd()
      throws IOException {
          ByteArrayOutputStream out = new ByteArrayOutputStream();
          sendEnd(out);
          return out.size();
      }
      
      /* The following 2 methods don't need to be final, but they DO need
       * to be overridden as a pair, and the only way to make sure of that
       * is to make sure they AREN'T overridden. 
       */
  
      final public void send(OutputStream out) throws IOException {
          sendStart(out);
          sendHeader(out);
          sendEndOfHeader(out);
          sendData(out);
          sendEnd(out);
      }
      
      final public long length() throws IOException {
          return lengthOfStart() + 
                 lengthOfHeader() + 
                 lengthOfEndOfHeader() +
                 lengthOfData() + 
                 lengthOfEnd();
      }
  }
  
  
  
  1.1                  jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/StringPart.java
  
  Index: StringPart.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/httpclient/src/java/org/apache/commons/httpclient/methods/multipart/StringPart.java,v
1.1 2002/10/01 19:13:41 jsdever Exp $
   * $Revision: 1.1 $
   * $Date: 2002/10/01 19:13:41 $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2002 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "HttpClient", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * 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/>.
   *
   * [Additional notices, if required by prior licensing conditions]
   *
   */
  
  package org.apache.commons.httpclient.methods.multipart;
  
  import java.io.OutputStream;
  import java.io.IOException;
  
  /**
   * Simple string parameter for a multipart post
   *
   * @author <a href="mailto:mattalbright@yahoo.com">Matthew Albright</a>
   * @author <a href="mailto:jsdever@apache.org">Jeff Dever</a>
   *
   * @since 2.0
   */
  public class StringPart extends Part
  {
      private String name;
      private String value;
      
      /**
       * @param name
       * @param value the string to post
       */
      public StringPart(String name, String value) {
          this.name = name;
          this.value = value;
      }
  
      public String getName() {
          return name; 
      }
      
      protected void sendData(OutputStream out) 
      throws IOException {
          out.write(value.getBytes());    
      }
      
      protected long lengthOfData() 
      throws IOException {
          return value.getBytes().length;
      }
  }
  
  
  

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