The Tor Browser: mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
  * ====================================================================
  * 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.io.InputStream;
 import ch.boye.httpclientandroidlib.Header;
 import ch.boye.httpclientandroidlib.HttpException;
 import ch.boye.httpclientandroidlib.MalformedChunkCodingException;
 import ch.boye.httpclientandroidlib.TruncatedChunkException;
 import ch.boye.httpclientandroidlib.io.BufferInfo;
 import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
 import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
 import ch.boye.httpclientandroidlib.util.ExceptionUtils;
 /**
  * Implements chunked transfer coding. The content is received in small chunks.
  * Entities transferred using this input stream can be of unlimited length.
  * After the stream is read to the end, it provides access to the trailers,
  * if any.
  * <p>
  * Note that this class NEVER closes the underlying stream, even when close
  * gets called.  Instead, it will read until the "end" of its chunking on
  * close, which allows for the seamless execution of subsequent HTTP 1.1
  * requests, while not requiring the client to remember to read the entire
  * contents of the response.
  *
  *
  * @since 4.0
  *
  */
 public class ChunkedInputStream extends InputStream {
     private static final int CHUNK_LEN               = 1;
     private static final int CHUNK_DATA              = 2;
     private static final int CHUNK_CRLF              = 3;
     private static final int BUFFER_SIZE = 2048;
     /** The session input buffer */
     private final SessionInputBuffer in;
     private final CharArrayBuffer buffer;
     private int state;
     /** The chunk size */
     private int chunkSize;
     /** The current position within the current chunk */
     private int pos;
     /** True if we've reached the end of stream */
     private boolean eof = false;
     /** True if this stream is closed */
     private boolean closed = false;
     private Header[] footers = new Header[] {};
     /**
      * Wraps session input stream and reads chunk coded input.
      *
      * @param in The session input buffer
      */
     public ChunkedInputStream(final SessionInputBuffer in) {
         super();
         if (in == null) {
             throw new IllegalArgumentException("Session input buffer may not be null");
         }
         this.in = in;
         this.pos = 0;
         this.buffer = new CharArrayBuffer(16);
         this.state = CHUNK_LEN;
     }
     public int available() throws IOException {
         if (this.in instanceof BufferInfo) {
             int len = ((BufferInfo) this.in).length();
             return Math.min(len, this.chunkSize - this.pos);
         } else {
             return 0;
         }
     }
     /**
      * <p> Returns all the data in a chunked stream in coalesced form. A chunk
      * is followed by a CRLF. The method returns -1 as soon as a chunksize of 0
      * is detected.</p>
      *
      * <p> Trailer headers are read automatically at the end of the stream and
      * can be obtained with the getResponseFooters() method.</p>
      *
      * @return -1 of the end of the stream has been reached or the next data
      * byte
      * @throws IOException in case of an I/O error
      */
     public int read() throws IOException {
         if (this.closed) {
             throw new IOException("Attempted read from closed stream.");
         }
         if (this.eof) {
             return -1;
         }
         if (state != CHUNK_DATA) {
             nextChunk();
             if (this.eof) {
                 return -1;
             }
         }
         int b = in.read();
         if (b != -1) {
             pos++;
             if (pos >= chunkSize) {
                 state = CHUNK_CRLF;
             }
         }
         return b;
     }
     /**
      * Read some bytes from the stream.
      * @param b The byte array that will hold the contents from the stream.
      * @param off The offset into the byte array at which bytes will start to be
      * placed.
      * @param len the maximum number of bytes that can be returned.
      * @return The number of bytes returned or -1 if the end of stream has been
      * reached.
      * @throws IOException in case of an I/O error
      */
     public int read (byte[] b, int off, int len) throws IOException {
         if (closed) {
             throw new IOException("Attempted read from closed stream.");
         }
         if (eof) {
             return -1;
         }
         if (state != CHUNK_DATA) {
             nextChunk();
             if (eof) {
                 return -1;
             }
         }
         len = Math.min(len, chunkSize - pos);
         int bytesRead = in.read(b, off, len);
         if (bytesRead != -1) {
             pos += bytesRead;
             if (pos >= chunkSize) {
                 state = CHUNK_CRLF;
             }
             return bytesRead;
         } else {
             eof = true;
             throw new TruncatedChunkException("Truncated chunk "
                     + "( expected size: " + chunkSize
                     + "; actual size: " + pos + ")");
         }
     }
     /**
      * Read some bytes from the stream.
      * @param b The byte array that will hold the contents from the stream.
      * @return The number of bytes returned or -1 if the end of stream has been
      * reached.
      * @throws IOException in case of an I/O error
      */
     public int read (byte[] b) throws IOException {
         return read(b, 0, b.length);
     }
     /**
      * Read the next chunk.
      * @throws IOException in case of an I/O error
      */
     private void nextChunk() throws IOException {
         chunkSize = getChunkSize();
         if (chunkSize < 0) {
             throw new MalformedChunkCodingException("Negative chunk size");
         }
         state = CHUNK_DATA;
         pos = 0;
         if (chunkSize == 0) {
             eof = true;
             parseTrailerHeaders();
         }
     }
     /**
      * Expects the stream to start with a chunksize in hex with optional
      * comments after a semicolon. The line must end with a CRLF: "a3; some
      * comment\r\n" Positions the stream at the start of the next line.
      *
      * @param in The new input stream.
      * @param required <tt>true<tt/> if a valid chunk must be present,
      *                 <tt>false<tt/> otherwise.
      *
      * @return the chunk size as integer
      *
      * @throws IOException when the chunk size could not be parsed
      */
     private int getChunkSize() throws IOException {
         int st = this.state;
         switch (st) {
         case CHUNK_CRLF:
             this.buffer.clear();
             int i = this.in.readLine(this.buffer);
             if (i == -1) {
                 return 0;
             }
             if (!this.buffer.isEmpty()) {
                 throw new MalformedChunkCodingException(
                     "Unexpected content at the end of chunk");
             }
             state = CHUNK_LEN;
             //$FALL-THROUGH$
         case CHUNK_LEN:
             this.buffer.clear();
             i = this.in.readLine(this.buffer);
             if (i == -1) {
                 return 0;
             }
             int separator = this.buffer.indexOf(';');
             if (separator < 0) {
                 separator = this.buffer.length();
             }
             try {
                 return Integer.parseInt(this.buffer.substringTrimmed(0, separator), 16);
             } catch (NumberFormatException e) {
                 throw new MalformedChunkCodingException("Bad chunk header");
             }
         default:
             throw new IllegalStateException("Inconsistent codec state");
         }
     }
     /**
      * Reads and stores the Trailer headers.
      * @throws IOException in case of an I/O error
      */
     private void parseTrailerHeaders() throws IOException {
         try {
             this.footers = AbstractMessageParser.parseHeaders
                 (in, -1, -1, null);
         } catch (HttpException e) {
             IOException ioe = new MalformedChunkCodingException("Invalid footer: "
                     + e.getMessage());
             ExceptionUtils.initCause(ioe, e);
             throw ioe;
         }
     }
     /**
      * Upon close, this reads the remainder of the chunked message,
      * leaving the underlying socket at a position to start reading the
      * next response without scanning.
      * @throws IOException in case of an I/O error
      */
     public void close() throws IOException {
         if (!closed) {
             try {
                 if (!eof) {
                     // read and discard the remainder of the message
                     byte buffer[] = new byte[BUFFER_SIZE];
                     while (read(buffer) >= 0) {
                     }
                 }
             } finally {
                 eof = true;
                 closed = true;
             }
         }
     }
     public Header[] getFooters() {
         return (Header[])this.footers.clone();
     }
 }

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mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java@fc2d59ddac77 (annotated)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java