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    <blockquote> <p>I'm about to create a class that will take my InputStream, read through it until I find the junk, break, then take what I just wrote to, convert it back into an InputStream and pass it along like nothing happened. But I'm worried that it'll be grossly inefficient, have bugs I shouldn't have to deal with (e.g. breaking on binary values such as embedded images) and hopefully unnecessary.</p> </blockquote> <p>you could use a <a href="http://download.oracle.com/javase/6/docs/api/java/io/FilterInputStream.html" rel="nofollow">FilterStream</a> for that no need for a buffer</p> <p>best thing to do is add a delimiter to the end of the XML like <code>--theXML ends HERE --</code> or a char not found in XML like a group of 16 <a href="http://en.wikipedia.org/wiki/End-of-transmission_character" rel="nofollow"><code>\u04</code> chars</a> (you then only need to check every 16th byte) to the end of the XML and read until you find it </p> <p>implementation assuming <code>\u04</code> delim</p> <pre><code>class WebStream extends FilterInputStream { byte[] buff = new byte[1024]; int offset = 0, length = 0; public WebStream(InputStream i) { super(i); } @Override public boolean markSupported() { return false; } @Override public int read() throws IOException { if (offset == length) readNextChunk(); if (length == -1) return -1;// eof return buff[offset++]; } @Override public int read(byte[] b, int off, int len) throws IOException { if (offset == length) readNextChunk(); if (length == -1) return -1;// eof int cop = length - offset; if (len &lt; cop) cop = len; System.arraycopy(buff, offset, b, off, cop); offset += cop; return cop; } private void readNextChunk() throws IOException { if (offset &lt;= length) { System.arraycopy(buff, offset, buff, 0, length - offset); length -= offset; offset = 0; } int read = in.read(buff, length, buff.length - length); if (read &lt; 0 &amp;&amp; length &lt;= 0) { length = -1; offset = 0; return; } // note that this is assuming ascii compatible // anything like utf16 or utf32 will break here for (int i = length; i &lt; read + length; i += 16) { if (buff[i] == 0x04) { while (buff[--i] == 0x04) ;// find beginning of delim block length = i; read = 0; } } } } </code></pre> <p>note this misses throws, some error checking and needs proper debugging</p>
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