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From zw...@apache.org
Subject [6/6] git commit: Moved plugins under trunk/
Date Thu, 01 Mar 2012 16:19:43 GMT
Moved plugins under trunk/


git-svn-id: https://svn.apache.org/repos/asf/trafficserver/plugins/trunk@1199005 13f79535-47bb-0310-9956-ffa450edef68


Project: http://git-wip-us.apache.org/repos/asf/trafficserver/repo
Commit: http://git-wip-us.apache.org/repos/asf/trafficserver/commit/2f0fb7ac
Tree: http://git-wip-us.apache.org/repos/asf/trafficserver/tree/2f0fb7ac
Diff: http://git-wip-us.apache.org/repos/asf/trafficserver/diff/2f0fb7ac

Branch: refs/heads/master
Commit: 2f0fb7acc36bc84cb24c33d6d0ce85c99fa3585c
Parents: 
Author: Bryan Call <bcall@apache.org>
Authored: Mon Nov 7 23:16:42 2011 +0000
Committer: Bryan Call <bcall@apache.org>
Committed: Mon Nov 7 23:16:42 2011 +0000

----------------------------------------------------------------------
 CHANGES          |   11 ++
 LICENSE          |  404 +++++++++++++++++++++++++++++++++++++++++++++++++
 Makefile         |   50 ++++++
 NOTICE           |    5 +
 README           |   95 ++++++++++++
 STATUS           |   21 +++
 example.conf     |   21 +++
 header_filter.cc |  213 ++++++++++++++++++++++++++
 lulu.h           |  108 +++++++++++++
 rules.cc         |  331 ++++++++++++++++++++++++++++++++++++++++
 rules.h          |  168 ++++++++++++++++++++
 11 files changed, 1427 insertions(+), 0 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/CHANGES
----------------------------------------------------------------------
diff --git a/CHANGES b/CHANGES
new file mode 100644
index 0000000..511f257
--- /dev/null
+++ b/CHANGES
@@ -0,0 +1,11 @@
+                                                         -*- coding: utf-8 -*-
+
+Changes with Apache Traffic Server header_filter 1.0
+
+  *) Added support for the "add" and "set" operators, e.g.
+
+        [SEND_REQUEST_HDR]
+            Host =www.ogre.com=
+            X-Append-Header +Added by ATS+
+
+  *) This is a basic plugin for doing header_filtering.

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/LICENSE
----------------------------------------------------------------------
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..bed90de
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,404 @@
+
+                                 Apache License
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+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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+
+Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura,
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+ 1. Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+ 3. The names of its contributors may not be used to endorse or promote
+    products derived from this software without specific prior written
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+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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+CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Any feedback is very welcome.
+http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
+email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
+
+~~~
+
+TK 8.3 License
+
+This software is copyrighted by the Regents of the University of
+California, Sun Microsystems, Inc., and other parties.  The following
+terms apply to all files associated with the software unless explicitly
+disclaimed in individual files.
+
+The authors hereby grant permission to use, copy, modify, distribute,
+and license this software and its documentation for any purpose, provided
+that existing copyright notices are retained in all copies and that this
+notice is included verbatim in any distributions. No written agreement,
+license, or royalty fee is required for any of the authorized uses.
+Modifications to this software may be copyrighted by their authors
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+the new terms are clearly indicated on the first page of each file where
+they apply.
+
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+
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+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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+NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR
+MODIFICATIONS.
+
+GOVERNMENT USE: If you are acquiring this software on behalf of the
+U.S. government, the Government shall have only "Restricted Rights"
+in the software and related documentation as defined in the Federal
+Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2).  If you
+are acquiring the software on behalf of the Department of Defense, the
+software shall be classified as "Commercial Computer Software" and the
+Government shall have only "Restricted Rights" as defined in Clause
+252.227-7013 (c) (1) of DFARs.  Notwithstanding the foregoing, the
+authors grant the U.S. Government and others acting in its behalf
+permission to use and distribute the software in accordance with the
+terms specified in this license.
+
+~~~
+
+BIND license
+
+Copyright (c) 1985, 1989, 1993
+   The Regents of the University of California.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+
+
+
+Portions Copyright (c) 1993 by Digital Equipment Corporation.
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies, and that
+the name of Digital Equipment Corporation not be used in advertising or
+publicity pertaining to distribution of the document or software without
+specific, written prior permission.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL
+WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES
+OF MERCHANTABILITY AND FITNESS.   IN NO EVENT SHALL DIGITAL EQUIPMENT
+CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
+ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+
+
+Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
+Portions Copyright (c) 1996-1999 by Internet Software Consortium.
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+~~~
+
+Copyright (C) 2007 Ariya Hidayat (ariya@kde.org)
+Copyright (C) 2006 Ariya Hidayat (ariya@kde.org)
+Copyright (C) 2005 Ariya Hidayat (ariya@kde.org)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+
+
+For the strlcat, strlcpy in inktomi++/ink_string.cc:
+
+Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/Makefile
----------------------------------------------------------------------
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..15def35
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,50 @@
+#  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.
+
+TSXS?=tsxs
+CXXFLAGS=-O3 -Wall
+
+all:	header_filter.cc rules.cc
+	$(TSXS) -v -C $? -o header_filter.so
+
+install:
+	$(TSXS) -i -o header_filter.so
+
+clean:
+	rm -f *.lo *.so *.bz2 *.asc *.md5 *.sha1
+
+
+# Don't touch
+PACKAGE=header_filter
+VERSION=1.0
+distdir = $(PACKAGE)-$(VERSION)
+remove_distdir = \
+  { test ! -d "$(distdir)" \
+    || { find "$(distdir)" -type d ! -perm -200 -exec chmod u+w {} ';' \
+         && rm -fr "$(distdir)"; }; }
+
+asf-distdir:
+	@$(remove_distdir)
+	svn export . $(distdir)
+
+asf-dist: asf-distdir
+	tar chof - $(distdir) | bzip2 -9 -c >$(distdir).tar.bz2
+	@$(remove_distdir)
+
+asf-dist-sign: asf-dist
+	md5sum -b $(distdir).tar.bz2 >$(distdir).tar.bz2.md5
+	sha1sum -b $(distdir).tar.bz2 >$(distdir).tar.bz2.sha1
+	gpg2 --armor --output $(distdir).tar.bz2.asc  --detach-sig $(distdir).tar.bz2

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/NOTICE
----------------------------------------------------------------------
diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..5282dde
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,5 @@
+Apache Traffic Server
+Copyright 2011 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/README
----------------------------------------------------------------------
diff --git a/README b/README
new file mode 100644
index 0000000..f10a9ac
--- /dev/null
+++ b/README
@@ -0,0 +1,95 @@
+Apache Traffic Server Header Filter plugin
+==========================================
+
+This is a simple plugin for filtering out headers from requests (or
+responses). Typical configuration is done either with a global
+configuration, in .../etc/trafficserver/plugin.config:
+
+    header_filter.so /usr/local/etc/hdr_filters.conf
+
+
+Or, alternatively, in a per-remap rule configuration 
+
+    map http://a.com/ http://b.com @plugin=header_filter.so @pparam=hdr_filters.conf
+
+
+Even if you don't have a global configuration, if your remap rules
+schedules actions in hooks other than during remap, you must also add the
+header_filter.so to the plugin.config (see above), but without args:
+
+    header_filter.so
+
+
+The configuration files looks like
+
+[READ_REQUEST_HDR]
+	X-From-Someone
+	Cookie
+
+[READ_RESPONSE_HDR]
+	X-From-Server
+	Set-Cookie
+
+[SEND_RESPONSE_HDR]
+	X-Fie "Test"    # Match the entire string
+	X-Foo /Test/    # Match the (Perl) regex
+	X-Bar [Test*    # Match the prefix string
+	X-Fum *Test]    # Match the postfix string
+
+
+Comments are prefixed with #, and in most cases, the regular expression
+matching is the best choice (very little overhead). The pattern matches
+can also take an option '!' to reverse the test. The default action is
+to delete all headers that do (not) match the pattern. E.g.
+
+[SEND_REQUEST_HDR]
+	X-Fie   /test/
+	X-Foo ! /test/i
+
+
+The final "i" qualifier (works on all pattern matches) forces the match or
+comparison to be made case insensitive (just like in Perl).
+
+
+It's also possible to replace or add headers, using the = and +
+operators. For example
+
+[SEND_REQUEST_HDR]
+	Host =www.example.com=
+	X-Foo +ATS+
+
+
+This will force the Host: header to have exactly one value,
+www.example.com, while X-Foo will have at least one header with the value
+ATS, but there could be more instances of the header from the existing
+header in the request.
+
+
+Possible hooks are
+
+	 READ_REQUEST_HDR
+	 SEND_REQUEST_HDR
+	 READ_RESPONSE_HDR
+	 SEND_RESPONSE_HDR
+
+
+If not specified, the default hook to add the rules (headers to filter) is
+READ_REQUEST_HDR. It's completely acceptable (and useful) to configure a
+remap rule to delete headers in a later hook (e.g. when reading a response
+from the server). This is what actually makes the plugin even remotely
+useful.
+
+
+
+BUILDING
+========
+
+A simple
+
+    % make
+    % make install
+
+
+should do it, assuming that you have the tsxs script in your search
+path. This script is installed with your installation of Apache Traffic
+Server.

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/STATUS
----------------------------------------------------------------------
diff --git a/STATUS b/STATUS
new file mode 100644
index 0000000..e6f3c71
--- /dev/null
+++ b/STATUS
@@ -0,0 +1,21 @@
+Traffic Server Header Filter 1.0 STATUS:                                              -*-text-*-
+Last modified at [$Date: 2010-09-23 10:18:00 -0600 (Thu, 23 Sep 2010) $]
+
+The current version of this file can be found at:
+
+  * https://svn.apache.org/repos/asf/trafficserver/plugins/header_filter/STATUS
+
+
+Release history:
+    1.0.0     : Released June 27th, 2011
+
+
+Contributors looking for a mission:
+
+  * Just do an egrep on "TODO" or "XXX" in the source.
+
+  * Review the bug database at: https://issues.apache.org/jira/browse/TS
+
+      - Download, test and review patches attached to open bugs
+
+  * Open bugs in the bug database.

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/example.conf
----------------------------------------------------------------------
diff --git a/example.conf b/example.conf
new file mode 100644
index 0000000..8914b9e
--- /dev/null
+++ b/example.conf
@@ -0,0 +1,21 @@
+#
+# This following will:
+#    - nuke the cookie headers (all of them)
+#    - Replace the Host: header with www.ogre.com
+#    - Add a header X-Append-Header: Added by ATS
+#
+[READ_RESPONSE_HDR]
+  Set-Cookie
+  Expires
+  Vary /user-agent/i
+  X-Foo ! "test"
+
+
+#
+# There can only ever be one Host: header (the plugin assures that since we use the set-operator)
+# but there can be more than one X-Append-Header (since we use the add-operator).
+#
+[SEND_REQUEST_HDR]
+	Cookie
+	Host =www.ogre.com=
+	X-Append-Header +Added by ATS+

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/header_filter.cc
----------------------------------------------------------------------
diff --git a/header_filter.cc b/header_filter.cc
new file mode 100644
index 0000000..48425d1
--- /dev/null
+++ b/header_filter.cc
@@ -0,0 +1,213 @@
+/*
+  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.
+*/
+
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// 
+// Main entry points for the plugin hooks etc.
+//
+#include <ts/ts.h>
+#include <ts/remap.h>
+#include <stdio.h>
+
+#include "rules.h"
+
+using namespace ::HeaderFilter;
+
+// Global plugin rules
+Rules global;
+int arg_idx;
+
+// TODO: Maybe we should use wrappers for TSmalloc() for pcre_malloc (and _free),
+// but since we only compile at config time, it's really not that important.
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Continuation
+//
+static int
+cont_header_filter(TSCont contp, TSEvent event, void *edata)
+{
+  TSHttpTxn txnp = (TSHttpTxn) edata;
+  TSHttpHookID hook = TS_HTTP_LAST_HOOK;
+  TSMBuffer reqp;
+  TSMLoc hdr_loc;
+
+  // Get the resources necessary to process this event
+  switch (event) {
+  case TS_EVENT_HTTP_READ_REQUEST_HDR:
+    if (TS_SUCCESS == TSHttpTxnClientReqGet(txnp, &reqp, &hdr_loc))
+      hook = TS_HTTP_READ_REQUEST_HDR_HOOK;
+    break;
+  case TS_EVENT_HTTP_SEND_REQUEST_HDR:
+    if (TS_SUCCESS == TSHttpTxnServerReqGet(txnp, &reqp, &hdr_loc))
+      hook = TS_HTTP_SEND_REQUEST_HDR_HOOK;
+    break;
+  case TS_EVENT_HTTP_READ_RESPONSE_HDR:
+    if (TS_SUCCESS == TSHttpTxnServerRespGet(txnp, &reqp, &hdr_loc))
+      hook = TS_HTTP_READ_RESPONSE_HDR_HOOK;
+    break;
+  case TS_EVENT_HTTP_SEND_RESPONSE_HDR:
+    if (TS_SUCCESS == TSHttpTxnClientRespGet(txnp, &reqp, &hdr_loc))
+      hook = TS_HTTP_SEND_RESPONSE_HDR_HOOK;
+    break;
+  default:
+    TSError("header_filter: unknown event for this plugin");
+    TSDebug(PLUGIN_NAME, "unknown event for this plugin");
+    break;
+  }
+
+  if (hook != TS_HTTP_LAST_HOOK) {
+    Rules* from_remap;
+
+    global.execute(reqp, hdr_loc, hook);
+
+    if (TS_HTTP_READ_REQUEST_HDR_HOOK != hook) { // Don't run the hook handled by remap plugin
+      if ((from_remap = (Rules*)TSHttpTxnArgGet(txnp, arg_idx))) {
+        from_remap->execute(reqp, hdr_loc, hook);
+      }
+    }
+    TSHandleMLocRelease(reqp, TS_NULL_MLOC, hdr_loc);
+  }
+
+  TSHttpTxnReenable(txnp, TS_EVENT_HTTP_CONTINUE);
+  return 0;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Initialize the InkAPI plugin for the global hooks we support.
+//
+void
+TSPluginInit(int argc, const char *argv[])
+{
+  TSPluginRegistrationInfo info;
+
+  info.plugin_name = const_cast<char*>(PLUGIN_NAME);
+  info.vendor_name = const_cast<char*>("Apache");
+  info.support_email = const_cast<char*>("users@trafficserver.apache.org");
+
+  if (!TSPluginRegister(TS_SDK_VERSION_3_0 , &info)) {
+    TSError("header_filter: plugin registration failed.\n"); 
+  }
+
+  // Parse the rules file
+  if ((argc > 1)) {
+    if (!global.parse_file(argv[1]))
+      TSError("header_filter: failed to parse configuration file");
+  }
+
+  TSCont cont = TSContCreate(cont_header_filter, NULL);
+
+  for (int i=TS_HTTP_READ_REQUEST_HDR_HOOK; i < TS_HTTP_LAST_HOOK; ++i) {
+    if (global.supported_hook(static_cast<TSHttpHookID>(i))) {
+      TSDebug(PLUGIN_NAME, "Registering hook %d", i);
+      TSHttpHookAdd(static_cast<TSHttpHookID>(i), cont);
+    }
+  }
+  if (TSHttpArgIndexReserve(PLUGIN_NAME, "Filter out headers in various hooks", &arg_idx) != TS_SUCCESS) {
+    TSError("header_filter: failed to reserve private data slot");
+  }
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Initialize the plugin as a remap plugin.
+//
+TSReturnCode
+TSRemapInit(TSRemapInterface* api_info, char *errbuf, int errbuf_size)
+{
+  if (!api_info) {
+    strncpy(errbuf, "[tsremap_init] - Invalid TSRemapInterface argument", errbuf_size - 1);
+    return TS_ERROR;
+  }
+
+  if (api_info->size < sizeof(TSRemapInterface)) {
+    strncpy(errbuf, "[tsremap_init] - Incorrect size of TSRemapInterface structure", errbuf_size - 1);
+    return TS_ERROR;
+  }
+
+  if (api_info->tsremap_version < TSREMAP_VERSION) {
+    snprintf(errbuf, errbuf_size - 1, "[tsremap_init] - Incorrect API version %ld.%ld",
+             api_info->tsremap_version >> 16, (api_info->tsremap_version & 0xffff));
+    return TS_ERROR;
+  }
+
+  TSDebug(PLUGIN_NAME, "remap plugin is succesfully initialized");
+  return TS_SUCCESS;                     /* success */
+}
+
+
+TSReturnCode
+TSRemapNewInstance(int argc, char* argv[], void** ih, char* errbuf, int errbuf_size)
+{
+  if (argc < 3) {
+    TSError("Unable to create remap instance, need rules file");
+    return TS_ERROR;
+  } else {
+    Rules* conf = new(Rules);
+
+    conf->parse_file(argv[2]);
+    *ih = static_cast<void*>(conf);
+  }
+
+  return TS_SUCCESS;
+}
+
+void
+TSRemapDeleteInstance(void* ih)
+{
+  Rules* conf = static_cast<Rules*>(ih);
+
+  delete conf;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Main entry point when used as a remap plugin.
+//
+TSRemapStatus
+TSRemapDoRemap(void* ih, TSHttpTxn rh, TSRemapRequestInfo *rri)
+{
+  if (NULL == ih) {
+    TSDebug(PLUGIN_NAME, "No Rules configured, falling back to default mapping rule");
+  } else {
+    Rules* confp = static_cast<Rules*>(ih);
+
+    TSHttpTxnArgSet(rh, arg_idx, static_cast<void*>(ih)); // Save for later hooks
+    confp->execute(rri->requestBufp, rri->requestHdrp, TS_HTTP_READ_REQUEST_HDR_HOOK);
+  }
+
+  return TSREMAP_NO_REMAP;
+}
+
+
+/*
+  local variables:
+  mode: C++
+  indent-tabs-mode: nil
+  c-basic-offset: 2
+  c-comment-only-line-offset: 0
+  c-file-offsets: ((statement-block-intro . +)
+  (label . 0)
+  (statement-cont . +)
+  (innamespace . 0))
+  end:
+
+  Indent with: /usr/bin/indent -ncs -nut -npcs -l 120 logstats.cc
+*/

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/lulu.h
----------------------------------------------------------------------
diff --git a/lulu.h b/lulu.h
new file mode 100644
index 0000000..47b08d0
--- /dev/null
+++ b/lulu.h
@@ -0,0 +1,108 @@
+/*
+  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.
+*/
+
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// 
+// Implement the classes for the various types of hash keys we support.
+//
+#ifndef __LULU_H__
+#define __LULU_H__ 1
+
+// Define UNUSED properly.
+#if ((__GNUC__ >= 3) || ((__GNUC__ == 2) && (__GNUC_MINOR__ >= 7)))
+#define UNUSED __attribute__ ((unused))
+#else
+#define UNUSED
+#endif /* #if ((__GNUC__ >= 3) || ((__GNUC__ == 2) && (__GNUC_MINOR__ >= 7))) */
+
+#include <sys/types.h>
+
+// Memory barriers on i386 / linux / gcc
+#if defined(__i386__)
+#define mb()  __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
+#define rmb() __asm__ __volatile__ ( "lock; addl $0,0(%%esp)" : : : "memory" )
+#define wmb() __asm__ __volatile__ ( "" : : : "memory")
+#elif defined(__x86_64__)
+#define mb()  __asm__ __volatile__ ( "mfence" : : : "memory")
+#define rmb() __asm__ __volatile__ ( "lfence" : : : "memory")
+#define wmb() __asm__ __volatile__ ( "" : : : "memory")
+#else
+#error "Define barriers"
+#endif
+
+// Used for Debug etc.
+static const char* PLUGIN_NAME = "header_filter";
+static const char* PLUGIN_NAME_DBG = "header_filter_dbg";
+
+
+// From the atomic portions of ATS
+typedef int int32;
+typedef unsigned int intu32;
+typedef long long int64;
+typedef unsigned long long intu64;
+
+typedef volatile int32 vint32;
+typedef volatile int64 vint64;
+typedef volatile void *vvoidp;
+typedef vint32 *pvint32;
+typedef vint64 *pvint64;
+typedef vvoidp *pvvoidp;
+
+#if defined(__GNUC__) && (__GNUC__ >= 4) && (__GNUC_MINOR__ >= 1)
+
+/* see http://gcc.gnu.org/onlinedocs/gcc-4.1.2/gcc/Atomic-Builtins.html */
+static inline int32 ink_atomic_swap(pvint32 mem, int32 value) { return __sync_lock_test_and_set(mem, value); }
+static inline int64 ink_atomic_swap64(pvint64 mem, int64 value) { return __sync_lock_test_and_set(mem, value); }
+static inline void *ink_atomic_swap_ptr(vvoidp mem, void *value) { return __sync_lock_test_and_set((void**)mem, value); }
+static inline int ink_atomic_cas(pvint32 mem, int old, int new_value) { return __sync_bool_compare_and_swap(mem, old, new_value); }
+static inline int64 ink_atomic_cas64(pvint64 mem, int64 old, int64 new_value) { return __sync_bool_compare_and_swap(mem, old, new_value); }
+static inline int ink_atomic_cas_ptr(pvvoidp mem, void* old, void* new_value) { return __sync_bool_compare_and_swap(mem, old, new_value); }
+static inline int ink_atomic_increment(pvint32 mem, int value) { return __sync_fetch_and_add(mem, value); }
+static inline int64 ink_atomic_increment64(pvint64 mem, int64 value) { return __sync_fetch_and_add(mem, value); }
+static inline void *ink_atomic_increment_ptr(pvvoidp mem, intptr_t value) { return __sync_fetch_and_add((void**)mem, value); }
+#else
+// TODO: Deal with this case?
+#failure
+#endif
+
+
+// From google styleguide: http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml
+#define DISALLOW_COPY_AND_ASSIGN(TypeName)      \
+  TypeName(const TypeName&);                    \
+  void operator=(const TypeName&)
+
+
+#endif // __LULU_H__
+
+
+
+/*
+  local variables:
+  mode: C++
+  indent-tabs-mode: nil
+  c-basic-offset: 2
+  c-comment-only-line-offset: 0
+  c-file-offsets: ((statement-block-intro . +)
+  (label . 0)
+  (statement-cont . +)
+  (innamespace . 0))
+  end:
+
+  Indent with: /usr/bin/indent -ncs -nut -npcs -l 120 logstats.cc
+*/

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/rules.cc
----------------------------------------------------------------------
diff --git a/rules.cc b/rules.cc
new file mode 100644
index 0000000..62a50cf
--- /dev/null
+++ b/rules.cc
@@ -0,0 +1,331 @@
+/*
+  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.
+*/
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// 
+// Implemenation details for the rules class.
+//
+#include <fstream>
+#include <ts/ts.h>
+
+#include "rules.h"
+
+namespace HeaderFilter {
+
+const char* QUAL_DELIMITERS = "!/\"*[+=";
+
+
+// RulesEntry implementations
+void
+RulesEntry::append(RulesEntry* entry)
+{
+  RulesEntry* n = this;
+
+  while (NULL != n->_next)
+    n = n->_next;
+  n->_next = entry;
+}
+
+inline void
+add_header(TSMBuffer& reqp, TSMLoc& hdr_loc, const char* hdr, int hdr_len, const char* val, int val_len)
+{
+  if (val_len <= 0) {
+    TSDebug(PLUGIN_NAME, "\tWould set header %s to an empty value, skipping", hdr);
+  } else {
+    TSMLoc new_field;
+
+    if (TS_SUCCESS == TSMimeHdrFieldCreateNamed(reqp, hdr_loc, hdr, hdr_len, &new_field)) {
+      if (TS_SUCCESS == TSMimeHdrFieldValueStringInsert(reqp, hdr_loc, new_field, -1,  val, val_len))
+        if (TS_SUCCESS == TSMimeHdrFieldAppend(reqp, hdr_loc, new_field))
+          TSDebug(PLUGIN_NAME, "\tAdded header %s: %s", hdr, val);
+      TSHandleMLocRelease(reqp, hdr_loc, new_field);
+    }
+  }
+}
+
+void
+RulesEntry::execute(TSMBuffer& reqp, TSMLoc& hdr_loc) const
+{
+  if (_q_type == QUAL_ADD) {
+    add_header(reqp, hdr_loc, _header, _h_len, _qualifier, _q_len);
+  } else {
+    TSMLoc field = TSMimeHdrFieldFind(reqp, hdr_loc, _header, _h_len);
+    bool first_set = true;
+
+    while (field) {
+      TSMLoc tmp;
+      int val_len = 0;
+      const char* val = NULL;
+      bool nuke = false;
+      
+      if (_q_type != QUAL_NONE)
+        val = TSMimeHdrFieldValueStringGet(reqp, hdr_loc, field, 0, &val_len);
+
+      switch (_q_type) {
+      case QUAL_NONE:
+        nuke = true;
+        break;
+      case QUAL_REGEX:
+        if (val_len > 0) {
+          nuke = pcre_exec(_rex,            // the compiled pattern
+                           _extra,          // Extra data from study (maybe)
+                           val,                // the subject string
+                           val_len,            // the length of the subject
+                           0,                  // start at offset 0 in the subject
+                           0,                  // default options
+                           NULL,               // no output vector for substring information
+                           0) >= 0;
+        }
+        break;
+
+      case QUAL_STRING:
+        if (static_cast<size_t>(val_len) == _q_len) {
+          if (_options & PCRE_CASELESS) {
+            nuke = !strncasecmp(_qualifier, val, val_len);
+          } else {
+            nuke = !memcmp(_qualifier, val, val_len);
+          }
+        }
+        break;
+
+      case QUAL_PREFIX:
+        if (static_cast<size_t>(val_len) >= _q_len) {
+          if (_options & PCRE_CASELESS) {
+            nuke = !strncasecmp(_qualifier, val, _q_len);
+          } else {
+            nuke = !memcmp(_qualifier, val, _q_len);
+          }
+        }
+        break;
+
+      case QUAL_POSTFIX: 
+        if (static_cast<size_t>(val_len) >= _q_len) {
+          if (_options & PCRE_CASELESS) {
+            nuke = !strncasecmp(_qualifier, val + val_len - _q_len, _q_len);
+          } else {
+            nuke = !memcmp(_qualifier, val + val_len - _q_len, _q_len);
+          }
+        }
+        break;
+      case QUAL_SET:
+        if (first_set) {
+          nuke = false;
+          first_set = false;
+          if (TS_SUCCESS == TSMimeHdrFieldValueStringSet(reqp, hdr_loc, field, -1, _qualifier, _q_len))
+            TSDebug(PLUGIN_NAME, "\tSet header:  %s: %s", _header, _qualifier);
+        } else {
+          // Nuke all other "duplicates" of this header
+          nuke = true;
+        }
+        
+      default:
+        break;
+      }
+
+      tmp = TSMimeHdrFieldNextDup(reqp, hdr_loc, field);
+      if (_inverse)
+        nuke = !nuke;
+      if (nuke) {
+        if (TS_SUCCESS == TSMimeHdrFieldDestroy(reqp, hdr_loc, field))
+          TSDebug(PLUGIN_NAME, "\tDeleting header %.*s", _h_len, _header);
+      }
+      TSHandleMLocRelease(reqp, hdr_loc, field);
+      field = tmp;
+    }
+  }
+}
+
+
+// Rules class implementations
+Rules::~Rules()
+{
+  TSDebug(PLUGIN_NAME_DBG, "Calling DTOR for Rules");
+
+  for (int i = 0; i < TS_HTTP_LAST_HOOK; ++i)
+    delete _entries[i];
+}
+
+RulesEntry*
+Rules::add_entry(const TSHttpHookID hook, const std::string& s, const std::string& q, QualifierTypes type, bool inverse, int options)
+{
+  RulesEntry* e = new(RulesEntry)(s, q, type, inverse, options);
+
+  TSAssert(supported_hook(hook));
+  if (NULL == _entries[hook]) {
+    _entries[hook] = e;
+  } else {
+    _entries[hook]->append(e);
+  }
+  
+  return e;
+}
+
+bool
+Rules::parse_file(const char* filename)
+{
+  std::ifstream f;
+  TSHttpHookID hook = TS_HTTP_READ_REQUEST_HDR_HOOK;
+  int lineno = 0;
+
+  // TODO: Should we support "glob" here, to specify more than one filename?
+  // TODO: Should we support a 'default' prefix here for the rules?
+  f.open(filename, std::ios::in);
+  if (!f.is_open()) {
+    TSError("unable to open %s", filename);
+    return false;
+  }
+  TSDebug(PLUGIN_NAME, "Parsing config file %s", filename);
+  while (!f.eof()) {
+    bool inverse = false;
+    int options = 0;
+    QualifierTypes type = QUAL_NONE;
+    std::string line, word, qualifier;
+    std::string::size_type pos1, pos2;
+
+    getline(f, line);
+    ++lineno;
+    if (line.empty())
+      continue;
+
+    pos1 = line.find_first_not_of(" \t\n");
+    if (pos1 != std::string::npos) {
+      if (line[pos1] == '#') {
+        continue; // Skip comments
+      } else {
+        pos2 = line.find_first_of("# \t\n", pos1+1); // end of word
+        if (pos2 == std::string::npos) {
+          word = line.substr(pos1);
+          pos1 = pos2;
+        } else {
+          word = line.substr(pos1, pos2-pos1);
+          pos1 = line.find_first_of(QUAL_DELIMITERS, pos2+1);
+        }
+
+        if (word == "[READ_REQUEST_HDR]") {
+          hook = TS_HTTP_READ_REQUEST_HDR_HOOK;
+        } else if (word == "[SEND_REQUEST_HDR]") {
+          hook = TS_HTTP_SEND_REQUEST_HDR_HOOK;
+        } else if (word == "[READ_RESPONSE_HDR]") {
+          hook = TS_HTTP_READ_RESPONSE_HDR_HOOK;
+        } else if (word == "[SEND_RESPONSE_HDR]") {
+          hook = TS_HTTP_SEND_RESPONSE_HDR_HOOK;
+        } else  if (word.empty()) {
+          // Error case, but shouldn't happen?
+        } else {
+          // Treat everything else as headers (+ possibly a qualifier)
+          if (pos1 != std::string::npos) { // Found a specifier
+            if (line[pos1] == '!') {
+              inverse = true;
+              pos1 =  line.find_first_of(QUAL_DELIMITERS, pos1+1);
+            }
+            if (pos1 != std::string::npos) {
+              char trailer = ' ';
+
+              switch (line[pos1]) {
+              case '/':
+                type = QUAL_REGEX;
+                trailer = '/';
+                break;
+              case '"':
+                type = QUAL_STRING;
+                trailer = '"';
+                break;
+              case '*':
+                type = QUAL_POSTFIX;
+                trailer = ']';
+                break;
+              case '[':
+                type = QUAL_PREFIX;
+                trailer = '*';
+                break;
+              case '+':
+                type = QUAL_ADD;
+                inverse = false; // Can never inverse the add operator
+                trailer = '+';
+                break;
+              case '=':
+                type = QUAL_SET;
+                inverse = false; // Can never inverse the set operator
+                trailer = '=';
+                break;
+              default:
+                // TODO: Error case?
+                break;
+              }
+                
+              pos2 = line.find_first_of(trailer, pos1+1);
+              if (pos2 != std::string::npos) {
+                qualifier = line.substr(pos1+1, pos2-pos1-1);
+                if (line[pos2+1] == 'i')
+                  options |= PCRE_CASELESS;
+                TSDebug(PLUGIN_NAME, "Adding '%s' to hook %d, type is %d, qualifier is %c %s (%c)",
+                        word.c_str(), hook, type, inverse ? '!' : ' ', qualifier.c_str(), options & PCRE_CASELESS ? 'i' : ' ');
+                add_entry(hook, word, qualifier, type, inverse, options);
+              } else {
+                TSError("Missing trailing delimiter in qualifier");
+              }
+            } else {
+              TSError("Missing leading delimiter in qualifier");
+            }
+          } else {
+            // No qualifier, so we'll nuke this header for all values
+            TSDebug(PLUGIN_NAME, "Adding %s to hook %d (unqualified)", word.c_str(), hook);
+            add_entry(hook, word);
+          }
+        }
+      }
+    }
+  }
+
+  return true;
+}
+
+
+void
+Rules::execute(TSMBuffer& reqp, TSMLoc& hdr_loc, const TSHttpHookID hook) const
+{
+  TSAssert(supported_hook(hook));
+
+  if (_entries[hook]) {
+    RulesEntry* n = _entries[hook];
+
+    TSDebug(PLUGIN_NAME, "Executing rules(s) for hook %d", hook);
+    do {
+      n->execute(reqp, hdr_loc);
+    } while (NULL != (n = n->next()));
+  }
+}
+
+
+} // End of namespace ::HeaderFilter
+
+
+/*
+  local variables:
+  mode: C++
+  indent-tabs-mode: nil
+  c-basic-offset: 2
+  c-comment-only-line-offset: 0
+  c-file-offsets: ((statement-block-intro . +)
+  (label . 0)
+  (statement-cont . +)
+  (innamespace . 0))
+  end:
+
+  Indent with: /usr/bin/indent -ncs -nut -npcs -l 120 logstats.cc
+*/

http://git-wip-us.apache.org/repos/asf/trafficserver/blob/2f0fb7ac/rules.h
----------------------------------------------------------------------
diff --git a/rules.h b/rules.h
new file mode 100644
index 0000000..99043ca
--- /dev/null
+++ b/rules.h
@@ -0,0 +1,168 @@
+/*
+    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.
+*/
+
+//////////////////////////////////////////////////////////////////////////////////////////////
+// 
+// Class for holding a set of configurations. There would be one global configuration, used
+// by all hooks / requests, and one optional configuration for each remap rule.
+//
+#ifndef __RULES_H__
+#define __RULES_H__ 1
+
+#include <string>
+#include <string.h>
+#include <ts/ts.h>
+#include <pcre.h>
+#include "lulu.h"
+
+namespace HeaderFilter {
+
+// The delimiters might look arbitrary, but are choosen to make parsing trivial
+enum QualifierTypes {
+  QUAL_NONE = 0,
+  QUAL_REGEX = 1,		// Regular expression, /match/
+  QUAL_STRING = 2,		// Full string, "match"
+  QUAL_PREFIX = 3,		// Sub-string prefix, [match*
+  QUAL_POSTFIX = 4,		// Sub-string postfix, *match]
+  // This is a semi-hack, but whatever (for now, until we get Lua module done!
+  QUAL_ADD = 5,			// Add the header +string+
+  QUAL_SET = 6			// Set the header =string=, leaving only one header with the new value
+};
+
+
+class RulesEntry
+{
+public:
+  RulesEntry(const std::string& s, const std::string& q, QualifierTypes type, bool inverse, int options)
+    : _header(NULL), _h_len(0), _qualifier(NULL), _q_len(0), _q_type(type), _rex(NULL), _extra(NULL),
+      _inverse(inverse), _options(options), _next(NULL)
+  {
+    if (s.length() > 0) {
+      _header = TSstrdup(s.c_str());
+      _h_len = s.length();
+    }
+    
+    if (q.length() > 0) {
+      _qualifier = TSstrdup(q.c_str());
+      _q_len = q.length();
+      if (_q_type == QUAL_REGEX) {
+        const char* error;
+        int erroffset;
+
+        _rex = pcre_compile(_qualifier,           // the pattern
+                            _options,             // default options
+                            &error,               // for error message
+                            &erroffset,           // for error offset
+                            NULL);                // use default character tables
+        if (!_rex)
+          TSError("header_filter: PCRE failed on %s at offset %d: %s\n", _qualifier, erroffset, error);
+      }
+    }
+
+    TSDebug(PLUGIN_NAME_DBG, "Calling CTOR for RulesEntry, header is %s, qualifier is %s", _header, _qualifier);
+  }
+
+  ~RulesEntry()
+  {
+    TSDebug(PLUGIN_NAME_DBG, "Calling DTOR for RulesEntry");
+    delete _next; // Potentially "deep" recursion, but should be OK.
+    if (_header)
+      TSfree(_header);
+
+    if (QUAL_REGEX == _q_type) {
+      if (_rex)
+        pcre_free(_rex);
+      if (_extra)
+        pcre_free(_extra);
+    }
+    if (_qualifier)
+      TSfree(_qualifier);
+  }
+
+  void append(RulesEntry* entry);
+  void execute(TSMBuffer& reqp, TSMLoc& hdr_loc) const; // This is really the meat of the app
+  RulesEntry* next() const { return _next; }
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(RulesEntry);
+
+  char* _header;
+  size_t _h_len,;
+  char* _qualifier;
+  size_t _q_len;
+  QualifierTypes _q_type;
+  pcre* _rex;
+  pcre_extra* _extra;
+  bool _inverse;
+  int _options;
+  RulesEntry* _next;
+};
+
+
+class Rules
+{
+public:
+  Rules()
+  {
+    TSDebug(PLUGIN_NAME_DBG, "Calling CTOR for Rules");
+    memset(_entries, 0, sizeof(_entries));
+  }
+
+  virtual ~Rules();
+
+  RulesEntry* add_entry(const TSHttpHookID hook, const std::string& s, const std::string& q="", QualifierTypes type = QUAL_NONE,
+                        bool inverse=false, int options=0);
+  bool parse_file(const char* filename);
+
+  bool supported_hook(const TSHttpHookID hook) const
+  {
+    return ((hook == TS_HTTP_READ_REQUEST_HDR_HOOK) ||
+	    (hook == TS_HTTP_SEND_REQUEST_HDR_HOOK) ||
+	    (hook == TS_HTTP_READ_RESPONSE_HDR_HOOK) ||
+	    (hook == TS_HTTP_SEND_RESPONSE_HDR_HOOK));
+  }
+
+  void execute(TSMBuffer& reqp, TSMLoc& hdr_loc, const TSHttpHookID hook) const;
+
+private:
+  DISALLOW_COPY_AND_ASSIGN(Rules);
+
+  RulesEntry* _entries[TS_HTTP_LAST_HOOK]; // One possible set of entries for each hook
+};
+
+} // End of namespace ::HeaderFilter
+
+
+#endif // __RULES_H__
+
+
+
+/*
+  local variables:
+  mode: C++
+  indent-tabs-mode: nil
+  c-basic-offset: 2
+  c-comment-only-line-offset: 0
+  c-file-offsets: ((statement-block-intro . +)
+  (label . 0)
+  (statement-cont . +)
+  (innamespace . 0))
+  end:
+
+  Indent with: /usr/bin/indent -ncs -nut -npcs -l 120 logstats.cc
+*/


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