1 files changed, 232 insertions, 0 deletions
diff --git a/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ContentLengthInputStream.java b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ContentLengthInputStream.java
new file mode 100644
index 000000000..65a271cb8
--- /dev/null
+++ b/mobile/android/thirdparty/ch/boye/httpclientandroidlib/impl/io/ContentLengthInputStream.java
@@ -0,0 +1,232 @@
+/*
+ * ====================================================================
+ * 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.ConnectionClosedException;
+import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
+import ch.boye.httpclientandroidlib.io.BufferInfo;
+import ch.boye.httpclientandroidlib.io.SessionInputBuffer;
+import ch.boye.httpclientandroidlib.util.Args;
+
+/**
+ * Input stream that cuts off after a defined number of bytes. This class
+ * is used to receive content of HTTP messages where the end of the content
+ * entity is determined by the value of the <code>Content-Length header</code>.
+ * Entities transferred using this stream can be maximum {@link Long#MAX_VALUE}
+ * long.
+ * <p>
+ * Note that this class NEVER closes the underlying stream, even when close
+ * gets called.  Instead, it will read until the "end" of its limit 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 ContentLengthInputStream extends InputStream {
+
+    private static final int BUFFER_SIZE = 2048;
+    /**
+     * The maximum number of bytes that can be read from the stream. Subsequent
+     * read operations will return -1.
+     */
+    private final long contentLength;
+
+    /** The current position */
+    private long pos = 0;
+
+    /** True if the stream is closed. */
+    private boolean closed = false;
+
+    /**
+     * Wrapped input stream that all calls are delegated to.
+     */
+    private SessionInputBuffer in = null;
+
+    /**
+     * Wraps a session input buffer and cuts off output after a defined number
+     * of bytes.
+     *
+     * @param in The session input buffer
+     * @param contentLength The maximum number of bytes that can be read from
+     * the stream. Subsequent read operations will return -1.
+     */
+    public ContentLengthInputStream(final SessionInputBuffer in, final long contentLength) {
+        super();
+        this.in = Args.notNull(in, "Session input buffer");
+        this.contentLength = Args.notNegative(contentLength, "Content length");
+    }
+
+    /**
+     * <p>Reads until the end of the known length of content.</p>
+     *
+     * <p>Does not close the underlying socket input, but instead leaves it
+     * primed to parse the next response.</p>
+     * @throws IOException If an IO problem occurs.
+     */
+    @Override
+    public void close() throws IOException {
+        if (!closed) {
+            try {
+                if (pos < contentLength) {
+                    final byte buffer[] = new byte[BUFFER_SIZE];
+                    while (read(buffer) >= 0) {
+                    }
+                }
+            } finally {
+                // close after above so that we don't throw an exception trying
+                // to read after closed!
+                closed = true;
+            }
+        }
+    }
+
+    @Override
+    public int available() throws IOException {
+        if (this.in instanceof BufferInfo) {
+            final int len = ((BufferInfo) this.in).length();
+            return Math.min(len, (int) (this.contentLength - this.pos));
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+     * Read the next byte from the stream
+     * @return The next byte or -1 if the end of stream has been reached.
+     * @throws IOException If an IO problem occurs
+     * @see java.io.InputStream#read()
+     */
+    @Override
+    public int read() throws IOException {
+        if (closed) {
+            throw new IOException("Attempted read from closed stream.");
+        }
+
+        if (pos >= contentLength) {
+            return -1;
+        }
+        final int b = this.in.read();
+        if (b == -1) {
+            if (pos < contentLength) {
+                throw new ConnectionClosedException(
+                        "Premature end of Content-Length delimited message body (expected: "
+                        + contentLength + "; received: " + pos);
+            }
+        } else {
+            pos++;
+        }
+        return b;
+    }
+
+    /**
+     * Does standard {@link InputStream#read(byte[], int, int)} behavior, but
+     * also notifies the watcher when the contents have been consumed.
+     *
+     * @param b     The byte array to fill.
+     * @param off   Start filling at this position.
+     * @param len   The number of bytes to attempt to read.
+     * @return The number of bytes read, or -1 if the end of content has been
+     *  reached.
+     *
+     * @throws java.io.IOException Should an error occur on the wrapped stream.
+     */
+    @Override
+    public int read (final byte[] b, final int off, final int len) throws java.io.IOException {
+        if (closed) {
+            throw new IOException("Attempted read from closed stream.");
+        }
+
+        if (pos >= contentLength) {
+            return -1;
+        }
+
+        int chunk = len;
+        if (pos + len > contentLength) {
+            chunk = (int) (contentLength - pos);
+        }
+        final int count = this.in.read(b, off, chunk);
+        if (count == -1 && pos < contentLength) {
+            throw new ConnectionClosedException(
+                    "Premature end of Content-Length delimited message body (expected: "
+                    + contentLength + "; received: " + pos);
+        }
+        if (count > 0) {
+            pos += count;
+        }
+        return count;
+    }
+
+
+    /**
+     * Read more bytes from the stream.
+     * @param b The byte array to put the new data in.
+     * @return The number of bytes read into the buffer.
+     * @throws IOException If an IO problem occurs
+     * @see java.io.InputStream#read(byte[])
+     */
+    @Override
+    public int read(final byte[] b) throws IOException {
+        return read(b, 0, b.length);
+    }
+
+    /**
+     * Skips and discards a number of bytes from the input stream.
+     * @param n The number of bytes to skip.
+     * @return The actual number of bytes skipped. <= 0 if no bytes
+     * are skipped.
+     * @throws IOException If an error occurs while skipping bytes.
+     * @see InputStream#skip(long)
+     */
+    @Override
+    public long skip(final long n) throws IOException {
+        if (n <= 0) {
+            return 0;
+        }
+        final byte[] buffer = new byte[BUFFER_SIZE];
+        // make sure we don't skip more bytes than are
+        // still available
+        long remaining = Math.min(n, this.contentLength - this.pos);
+        // skip and keep track of the bytes actually skipped
+        long count = 0;
+        while (remaining > 0) {
+            final int l = read(buffer, 0, (int)Math.min(BUFFER_SIZE, remaining));
+            if (l == -1) {
+                break;
+            }
+            count += l;
+            remaining -= l;
+        }
+        return count;
+    }
+}