pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/entity/DeflateInputStream.java

@@ -0,0 +1,228 @@
+/*
+ * ====================================================================
+ * 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.client.entity;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.PushbackInputStream;
+import java.util.zip.DataFormatException;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+/** Deflate input stream.    This class includes logic needed for various Rfc's in order
+* to reasonably implement the "deflate" compression style.
+*/
+public class DeflateInputStream extends InputStream
+{
+    private InputStream sourceStream;
+
+    public DeflateInputStream(final InputStream wrapped)
+        throws IOException
+    {
+        /*
+            * A zlib stream will have a header.
+            *
+            * CMF | FLG [| DICTID ] | ...compressed data | ADLER32 |
+            *
+            * * CMF is one byte.
+            *
+            * * FLG is one byte.
+            *
+            * * DICTID is four bytes, and only present if FLG.FDICT is set.
+            *
+            * Sniff the content. Does it look like a zlib stream, with a CMF, etc? c.f. RFC1950,
+            * section 2.2. http://tools.ietf.org/html/rfc1950#page-4
+            *
+            * We need to see if it looks like a proper zlib stream, or whether it is just a deflate
+            * stream. RFC2616 calls zlib streams deflate. Confusing, isn't it? That's why some servers
+            * implement deflate Content-Encoding using deflate streams, rather than zlib streams.
+            *
+            * We could start looking at the bytes, but to be honest, someone else has already read
+            * the RFCs and implemented that for us. So we'll just use the JDK libraries and exception
+            * handling to do this. If that proves slow, then we could potentially change this to check
+            * the first byte - does it look like a CMF? What about the second byte - does it look like
+            * a FLG, etc.
+            */
+
+        /* We read a small buffer to sniff the content. */
+        final byte[] peeked = new byte[6];
+
+        final PushbackInputStream pushback = new PushbackInputStream(wrapped, peeked.length);
+
+        final int headerLength = pushback.read(peeked);
+
+        if (headerLength == -1) {
+            throw new IOException("Unable to read the response");
+        }
+
+        /* We try to read the first uncompressed byte. */
+        final byte[] dummy = new byte[1];
+
+        final Inflater inf = new Inflater();
+
+        try {
+            int n;
+            while ((n = inf.inflate(dummy)) == 0) {
+                if (inf.finished()) {
+
+                    /* Not expecting this, so fail loudly. */
+                    throw new IOException("Unable to read the response");
+                }
+
+                if (inf.needsDictionary()) {
+
+                    /* Need dictionary - then it must be zlib stream with DICTID part? */
+                    break;
+                }
+
+                if (inf.needsInput()) {
+                    inf.setInput(peeked);
+                }
+            }
+
+            if (n == -1) {
+                throw new IOException("Unable to read the response");
+            }
+
+            /*
+                * We read something without a problem, so it's a valid zlib stream. Just need to reset
+                * and return an unused InputStream now.
+                */
+            pushback.unread(peeked, 0, headerLength);
+            sourceStream = new DeflateStream(pushback, new Inflater());
+        } catch (final DataFormatException e) {
+
+            /* Presume that it's an RFC1951 deflate stream rather than RFC1950 zlib stream and try
+                * again. */
+            pushback.unread(peeked, 0, headerLength);
+            sourceStream = new DeflateStream(pushback, new Inflater(true));
+        } finally {
+            inf.end();
+        }
+
+    }
+
+    /** Read a byte.
+    */
+    @Override
+    public int read()
+        throws IOException
+    {
+        return sourceStream.read();
+    }
+
+    /** Read lots of bytes.
+    */
+    @Override
+    public int read(final byte[] b)
+        throws IOException
+    {
+        return sourceStream.read(b);
+    }
+
+    /** Read lots of specific bytes.
+    */
+    @Override
+    public int read(final byte[] b, final int off, final int len)
+        throws IOException
+    {
+        return sourceStream.read(b,off,len);
+    }
+
+    /** Skip
+    */
+    @Override
+    public long skip(final long n)
+        throws IOException
+    {
+        return sourceStream.skip(n);
+    }
+
+    /** Get available.
+    */
+    @Override
+    public int available()
+        throws IOException
+    {
+        return sourceStream.available();
+    }
+
+    /** Mark.
+    */
+    @Override
+    public void mark(final int readLimit)
+    {
+        sourceStream.mark(readLimit);
+    }
+
+    /** Reset.
+    */
+    @Override
+    public void reset()
+        throws IOException
+    {
+        sourceStream.reset();
+    }
+
+    /** Check if mark is supported.
+    */
+    @Override
+    public boolean markSupported()
+    {
+        return sourceStream.markSupported();
+    }
+
+    /** Close.
+    */
+    @Override
+    public void close()
+        throws IOException
+    {
+        sourceStream.close();
+    }
+
+    static class DeflateStream extends InflaterInputStream {
+
+        private boolean closed = false;
+
+        public DeflateStream(final InputStream in, final Inflater inflater) {
+            super(in, inflater);
+        }
+
+        @Override
+        public void close() throws IOException {
+            if (closed) {
+                return;
+            }
+            closed = true;
+            inf.end();
+            super.close();
+        }
+
+    }
+
+}