1 files changed, 301 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java
new file mode 100644
index 000000000..447bd676d
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+++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ChunkedInputStream.java
@@ -0,0 +1,301 @@
+/*
+ * ====================================================================
+ * 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.annotation.NotThreadSafe;
+import ch.boye.httpclientandroidlib.io.BufferInfo;
+import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
+import ch.boye.httpclientandroidlib.util.Args;
+import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
+
+/**
+ * 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
+ *
+ */
+@NotThreadSafe
+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();
+        this.in = Args.notNull(in, "Session input buffer");
+        this.pos = 0;
+        this.buffer = new CharArrayBuffer(16);
+        this.state = CHUNK_LEN;
+    }
+
+    @Override
+    public int available() throws IOException {
+        if (this.in instanceof BufferInfo) {
+            final 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
+     */
+    @Override
+    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;
+            }
+        }
+        final 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
+     */
+    @Override
+    public int read (final byte[] b, final int off, final 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;
+            }
+        }
+        final int bytesRead = in.read(b, off, Math.min(len, chunkSize - pos));
+        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
+     */
+    @Override
+    public int read (final 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.
+     */
+    private int getChunkSize() throws IOException {
+        final int st = this.state;
+        switch (st) {
+        case CHUNK_CRLF:
+            this.buffer.clear();
+            final int bytesRead1 = this.in.readLine(this.buffer);
+            if (bytesRead1 == -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();
+            final int bytesRead2 = this.in.readLine(this.buffer);
+            if (bytesRead2 == -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 (final 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 (final HttpException ex) {
+            final IOException ioe = new MalformedChunkCodingException("Invalid footer: "
+                    + ex.getMessage());
+            ioe.initCause(ex);
+            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
+     */
+    @Override
+    public void close() throws IOException {
+        if (!closed) {
+            try {
+                if (!eof) {
+                    // read and discard the remainder of the message
+                    final byte buff[] = new byte[BUFFER_SIZE];
+                    while (read(buff) >= 0) {
+                    }
+                }
+            } finally {
+                eof = true;
+                closed = true;
+            }
+        }
+    }
+
+    public Header[] getFooters() {
+        return this.footers.clone();
+    }
+
+}