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<H3><A NAME="SECTION006561000000000000000"></A><A NAME="pyapi-mpfilt-meth"></A>
<BR>
4.5.6.1 Filter Methods
</H3>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-167' xml:id='l2h-167' class="method">pass_on</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Passes all data through the filter without any processing.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-168' xml:id='l2h-168' class="method">read</tt></b>(</nobr></td>
  <td><var></var><big>[</big><var>length</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
  Reads at most <var>len</var> bytes from the next filter, returning a string
  with the data read or None if End Of Stream (EOS) has been reached. A
  filter <em>must</em> be closed once the EOS has been encountered.

<P>
If the <var>len</var> argument is negative or omitted, reads all data
  currently available.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-169' xml:id='l2h-169' class="method">readline</tt></b>(</nobr></td>
  <td><var></var><big>[</big><var>length</var><big>]</big><var></var>)</td></tr></table></dt>
<dd>
  Reads a line from the next filter or up to <var>length</var> bytes.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-170' xml:id='l2h-170' class="method">write</tt></b>(</nobr></td>
  <td><var>string</var>)</td></tr></table></dt>
<dd>
  Writes <var>string</var> to the next filter.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-171' xml:id='l2h-171' class="method">flush</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Flushes the output by sending a FLUSH bucket.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-172' xml:id='l2h-172' class="method">close</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Closes the filter and sends an EOS bucket. Any further IO operations on
  this filter will throw an exception.
</dl>

<P>
<dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline">
  <td><nobr><b><tt id='l2h-173' xml:id='l2h-173' class="method">disable</tt></b>(</nobr></td>
  <td><var></var>)</td></tr></table></dt>
<dd>
  Tells mod_python to ignore the provided handler and just pass the data
  on. Used internally by mod_python to print traceback from exceptions
  encountered in filter handlers to avoid an infinite loop.
</dl>

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