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Posted to commits@trafficserver.apache.org by jp...@apache.org on 2012/02/03 06:05:28 UTC
git commit: TS-821: memcached_remap plugin
Updated Branches:
refs/heads/master ec2338552 -> cbcc55998
TS-821: memcached_remap plugin
Project: http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/repo
Commit: http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/commit/cbcc5599
Tree: http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/tree/cbcc5599
Diff: http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/diff/cbcc5599
Branch: refs/heads/master
Commit: cbcc55998aba7439d60c00b95de02918caef9c70
Parents: ec23385
Author: Opensource AT Navya Prabha <op...@navyaprabha.com>
Authored: Thu Feb 2 21:04:25 2012 -0800
Committer: James Peach <jp...@samba.org>
Committed: Thu Feb 2 21:04:25 2012 -0800
----------------------------------------------------------------------
Makefile | 3 +-
memcached_remap/AUTHORS | 7 +
memcached_remap/Changelog | 2 +
memcached_remap/LICENSE | 427 +++++++++++++++++++++++++++++++
memcached_remap/Makefile | 32 +++
memcached_remap/NOTICE | 5 +
memcached_remap/README | 122 +++++++++
memcached_remap/memcached_remap.cc | 244 ++++++++++++++++++
memcached_remap/sample.py | 18 ++
9 files changed, 859 insertions(+), 1 deletions(-)
----------------------------------------------------------------------
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/Makefile
----------------------------------------------------------------------
diff --git a/Makefile b/Makefile
index 1835ba5..386e6d3 100644
--- a/Makefile
+++ b/Makefile
@@ -22,7 +22,8 @@ TAR = tar chof - "$$tardir"
SUBDIRS = balancer buffer_upload cacheurl combo_handler esi geoip_acl \
header_filter hipes mysql_remap regex_remap \
- stale_while_revalidate stats_over_http
+ stale_while_revalidate stats_over_http \
+ memcached_remap
all:
@for plugin in $(SUBDIRS); do \
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/AUTHORS
----------------------------------------------------------------------
diff --git a/memcached_remap/AUTHORS b/memcached_remap/AUTHORS
new file mode 100644
index 0000000..945968f
--- /dev/null
+++ b/memcached_remap/AUTHORS
@@ -0,0 +1,7 @@
+Author: opensource@navyaprabha.com
+
+memcached_remap plugin
+
+========= CREDITS ===============
+Eric Balsa <er...@apache.org>
+Original concept via mysql_remap plugin
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/Changelog
----------------------------------------------------------------------
diff --git a/memcached_remap/Changelog b/memcached_remap/Changelog
new file mode 100644
index 0000000..3d16c80
--- /dev/null
+++ b/memcached_remap/Changelog
@@ -0,0 +1,2 @@
+1.0.0 20-May-2011
+ * Initial Release for 2.1.8-unstable apache release
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/LICENSE
----------------------------------------------------------------------
diff --git a/memcached_remap/LICENSE b/memcached_remap/LICENSE
new file mode 100644
index 0000000..ca4e0a3
--- /dev/null
+++ b/memcached_remap/LICENSE
@@ -0,0 +1,427 @@
+
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+SOFTWARE.
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+copyright notice and this permission notice appear in all copies.
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+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+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:
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+all copies or substantial portions of the Software.
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+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+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 <To...@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.
+
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+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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+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.
+
+
+INI parsing from
+
+Copyright (c) 2000-2007 by Nicolas Devillard.
+MIT License
+
+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
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+
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+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+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.
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/Makefile
----------------------------------------------------------------------
diff --git a/memcached_remap/Makefile b/memcached_remap/Makefile
new file mode 100644
index 0000000..3b220e5
--- /dev/null
+++ b/memcached_remap/Makefile
@@ -0,0 +1,32 @@
+# 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?=$(shell which tsxs)
+
+# you may need to change the path to memcached.h
+export CPPFLAGS+=-Wall $(shell pkg-config --cflags libmemcached)
+
+# you may need to adjust the path
+export LDFLAGS += $(shell pkg-config --libs libmemcached)
+
+all: memcached_remap.cc
+ $(TSXS) -v -C $? -o memcached_remap.so
+
+install: all
+ $(TSXS) -i -o memcached_remap.so
+
+clean:
+ rm -f *.lo *.so src/*.lo src/*.so
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/NOTICE
----------------------------------------------------------------------
diff --git a/memcached_remap/NOTICE b/memcached_remap/NOTICE
new file mode 100644
index 0000000..c19f064
--- /dev/null
+++ b/memcached_remap/NOTICE
@@ -0,0 +1,5 @@
+Apache Traffic Server
+Copyright 2010 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/README
----------------------------------------------------------------------
diff --git a/memcached_remap/README b/memcached_remap/README
new file mode 100644
index 0000000..3ad0461
--- /dev/null
+++ b/memcached_remap/README
@@ -0,0 +1,122 @@
+Apache Traffic Server Memcached-based remap plugin
+==============================================
+
+This is a plugin which is based on the mysql_remap code (http://svn.apache.org/repos/asf/trafficserver/plugins/mysql_remap/)
+that allows us to do dynamic reverse proxy (dynamic remap) based on the
+information present in the memcached database.
+
+ (decision via memcached)
+[Browser] <----> [Apache Traffic Server] <----------> [Backend Servers]
+ (decision via memcached)
+
+NOTE: memcached is used only as decision making place. All communication
+happens via HTTP between above components
+
+##################
+# QUICK HOWTO #
+##################
+
+The following steps are for Fedora-14 System, same will apply to your
+server too (please change things accordingly, if any)
+
+1. Install memcached
+
+sudo yum install memcached python-memcached
+
+2. Compile and Install the memcached_remap plugin
+
+[user@ memcached_remap]$ gmake
+/usr/local/bin/tsxs -C memcached_remap.cc -o memcached_remap.so
+ compiling memcached_remap.cc -> memcached_remap.lo
+ linking -> memcached_remap.so
+
+[user@ memcached_remap]$ sudo gmake install
+/usr/local/bin/tsxs -C memcached_remap.cc -o memcached_remap.so
+ compiling memcached_remap.cc -> memcached_remap.lo
+ linking -> memcached_remap.so
+/usr/local/bin/tsxs -i -o memcached_remap.so
+ installing memcached_remap.so ->
+/usr/local/libexec/trafficserver/memcached_remap.so
+
+3. Start the Traffic Server in Plugin Mode (to debug any issues)
+
+/usr/local/bin/traffic_server -T "memcached_remap"
+
+3. Start the memcached
+
+sudo service memcached
+
+4. Start apache on port 8080 (change configs accordingly)
+
+sudo service httpd start
+
+5. Add some keys into the memcached for testing (via python shell)
+
+[user@ memcached_remap]$ python
+Python 2.7 (r27:82500, Sep 16 2010, 18:02:00)
+[GCC 4.5.1 20100907 (Red Hat 4.5.1-3)] on linux2
+Type "help", "copyright", "credits" or "license" for more information.
+>>> import memcache
+>>> mc = memcache.Client(['127.0.0.1:11211'], debug=0)
+>>> print mc.get("http://localhost:80/")
+http://localhost:8080/
+>>> print mc.get("http://localhost:80/")
+http://localhost:8080/
+>>> mc.set("http://127.0.0.1:80/", "http://127.0.0.1:8080");
+True
+>>> print mc.get("http://127.0.0.1:80/")
+http://127.0.0.1:8080
+>>>
+
+6. Do sample query on localhost port 80
+
+[user@ ~]$ curl -v http://127.0.0.1/ -s > /dev/null
+* About to connect() to 127.0.0.1 port 80 (#0)
+* Trying 127.0.0.1... connected
+* Connected to 127.0.0.1 (127.0.0.1) port 80 (#0)
+> GET / HTTP/1.1
+> User-Agent: curl/7.21.0 (x86_64-redhat-linux-gnu) libcurl/7.21.0
+> NSS/3.12.8.0 zlib/1.2.5 libidn/1.18 libssh2/1.2.4
+> Host: 127.0.0.1
+> Accept: */*
+>
+< HTTP/1.1 200 OK
+< Date: Wed, 09 Mar 2011 15:48:25 GMT
+< Server: ATS/2.1.6-unstable
+< Last-Modified: Sat, 05 Mar 2011 16:15:13 GMT
+< ETag: "618ef-38b-49dbe914322ed"
+< Accept-Ranges: bytes
+< Content-Length: 907
+< Content-Type: text/html; charset=UTF-8
+< Age: 0
+< Connection: keep-alive
+<
+{ [data not shown]
+* Connection #0 to host 127.0.0.1 left intact
+* Closing connection #0
+
+7. Thats it !
+
+################################
+# SUPPORTED KEYS IN MEMCACHED #
+################################
+
+The advantage of memcached is that, its a hash table.
+
+KEY FORMAT: [PROTOCOL]://[SERVER]:[PORT]/
+--------------------------------------------
+(Even ending / is important!)
+
+PROTOCOL can be any word in a-z, A-Z chars
+SERVER can be any string which isn't a colon character
+PORT should be a number
+/ should end with a slash
+
+VALUE FORMAT: [PROTOCOL]://[SERVER]:[PORT]/
+--------------------------------------------
+(Even ending / is important!)
+
+PROTOCOL can be any word created from a-z, A-Z chars
+SERVER can be any string which isn't a colon character
+PORT should be a number
+/ should end with a slash
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/memcached_remap.cc
----------------------------------------------------------------------
diff --git a/memcached_remap/memcached_remap.cc b/memcached_remap/memcached_remap.cc
new file mode 100644
index 0000000..e4b16d8
--- /dev/null
+++ b/memcached_remap/memcached_remap.cc
@@ -0,0 +1,244 @@
+/*
+ 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.
+*/
+
+#include <ts/ts.h>
+#include <ts/remap.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+// change this on your box
+#include <libmemcached/memcached.h>
+
+// global settings
+static const char *PLUGIN_NAME = "memcached_remap";
+
+// memcached related global variables
+memcached_server_st *servers;
+memcached_st *memc;
+
+bool do_memcached_remap(TSCont contp, TSHttpTxn txnp)
+{
+ TSMBuffer reqp;
+ TSMLoc hdr_loc, url_loc, field_loc;
+ bool ret_val = false;
+
+ const char *request_host;
+ int request_host_length = 0;
+ const char *request_scheme;
+ int request_scheme_length = 0;
+ int request_port = 80;
+ char ikey[1024];
+ char *m_result = NULL;
+ size_t oval_length;
+ uint32_t flags;
+ memcached_return_t lrc;
+
+ if (TSHttpTxnClientReqGet((TSHttpTxn) txnp, &reqp, &hdr_loc) !=
+ TS_SUCCESS) {
+ TSDebug(PLUGIN_NAME, "could not get request data");
+ return false;
+ }
+
+ if (TSHttpHdrUrlGet(reqp, hdr_loc, &url_loc) != TS_SUCCESS) {
+ TSDebug(PLUGIN_NAME, "couldn't retrieve request url");
+ goto release_hdr;
+ }
+
+
+ field_loc =
+ TSMimeHdrFieldFind(reqp, hdr_loc, TS_MIME_FIELD_HOST,
+ TS_MIME_LEN_HOST);
+
+ if (!field_loc) {
+ TSDebug(PLUGIN_NAME, "couldn't retrieve request HOST header");
+ goto release_url;
+ }
+
+ request_host =
+ TSMimeHdrFieldValueStringGet(reqp, hdr_loc, field_loc, 0,
+ &request_host_length);
+ if (request_host == NULL || strlen(request_host) < 1) {
+ TSDebug(PLUGIN_NAME, "couldn't find request HOST header");
+ goto release_field;
+ }
+
+ request_scheme = TSUrlSchemeGet(reqp, url_loc, &request_scheme_length);
+ request_port = TSUrlPortGet(reqp, url_loc);
+
+ TSDebug(PLUGIN_NAME, " +++++MEMCACHED REMAP+++++ ");
+
+ TSDebug(PLUGIN_NAME,
+ "\nINCOMING REQUEST ->\n ::: from_scheme_desc: %.*s\n ::: from_hostname: %.*s\n ::: from_port: %d",
+ request_scheme_length, request_scheme, request_host_length,
+ request_host, request_port);
+
+ snprintf(ikey, 1024, "%.*s://%.*s:%d/", request_scheme_length,
+ request_scheme, request_host_length, request_host,
+ request_port);
+
+ TSDebug(PLUGIN_NAME, "querying for the key %s\n", ikey);
+ m_result =
+ memcached_get(memc, ikey, strlen(ikey), &oval_length, &flags,
+ &lrc);
+
+ char oscheme[1024], ohost[1024];
+ int oport;
+
+ if (lrc == MEMCACHED_SUCCESS) {
+ TSDebug(PLUGIN_NAME, "got the response from server : %s\n",
+ m_result);
+ TSDebug(PLUGIN_NAME, "scanf result : %d\n",
+ sscanf(m_result, "%[a-zA-Z]://%[^:]:%d", oscheme, ohost,
+ &oport));
+ if (sscanf
+ (m_result, "%[a-zA-Z]://%[^:]:%d", oscheme, ohost,
+ &oport) == 3) {
+ if (m_result)
+ free(m_result);
+ TSDebug(PLUGIN_NAME, "\nOUTGOING REQUEST ->\n ::: to_scheme_desc: %s\n ::: to_hostname: %s\n ::: to_port: %d", oscheme, ohost, oport); //row[0],row[1],row[2]);
+ TSMimeHdrFieldValueStringSet(reqp, hdr_loc, field_loc, 0,
+ ohost, -1);
+ TSUrlHostSet(reqp, url_loc, ohost, -1);
+ TSUrlSchemeSet(reqp, url_loc, oscheme, -1);
+ TSUrlPortSet(reqp, url_loc, oport);
+ ret_val = true;
+ } else {
+ if (m_result)
+ free(m_result);
+ goto not_found;
+ }
+ } else {
+ TSDebug(PLUGIN_NAME,
+ "didn't get any response from the server %d, %d, %d\n",
+ lrc, flags, oval_length);
+ goto not_found;
+ }
+
+ goto free_stuff; // free the result set after processed
+
+ not_found:
+ //lets build up a nice 404 message for someone
+ if (!ret_val) {
+ TSHttpHdrStatusSet(reqp, hdr_loc, TS_HTTP_STATUS_NOT_FOUND);
+ TSHttpTxnSetHttpRetStatus(txnp, TS_HTTP_STATUS_NOT_FOUND);
+ }
+ free_stuff:
+#if (TS_VERSION_NUMBER < 2001005)
+ if (request_host)
+ TSHandleStringRelease(reqp, hdr_loc, request_host);
+ if (request_scheme)
+ TSHandleStringRelease(reqp, hdr_loc, request_scheme);
+#endif
+ release_field:
+ if (field_loc)
+ TSHandleMLocRelease(reqp, hdr_loc, field_loc);
+ release_url:
+ if (url_loc)
+ TSHandleMLocRelease(reqp, hdr_loc, url_loc);
+ release_hdr:
+ if (hdr_loc)
+ TSHandleMLocRelease(reqp, TS_NULL_MLOC, hdr_loc);
+
+ return ret_val;
+}
+
+static int memcached_remap(TSCont contp, TSEvent event, void *edata)
+{
+ TSHttpTxn txnp = (TSHttpTxn) edata;
+ TSEvent reenable = TS_EVENT_HTTP_CONTINUE;
+
+ if (event == TS_EVENT_HTTP_READ_REQUEST_HDR) {
+ TSDebug(PLUGIN_NAME, "Reading Request");
+ TSSkipRemappingSet(txnp, 1);
+ if (!do_memcached_remap(contp, txnp)) {
+ reenable = TS_EVENT_HTTP_ERROR;
+ }
+ }
+
+ TSHttpTxnReenable(txnp, reenable);
+ return 1;
+}
+
+void TSPluginInit(int argc, const char *argv[])
+{
+ TSPluginRegistrationInfo info;
+ memcached_return_t rc;
+ //FILE *fp;
+ //char servers_string[8192];
+
+ info.plugin_name = const_cast < char *>(PLUGIN_NAME);
+ info.vendor_name = const_cast < char *>("Apache Software Foundation");
+ info.support_email = const_cast < char *>("eric@ericbalsa.com");
+
+ TSDebug(PLUGIN_NAME, "about to init memcached\n");
+ if (TSPluginRegister(TS_SDK_VERSION_2_0, &info) != TS_SUCCESS) {
+ TSError("memcached_remap: plugin registration failed.\n");
+ return;
+ }
+
+ // parse the configuration file
+ // TODO: this is still under testing 1.0.2 version should have this feature
+ /*
+ if(argc < 1) {
+ TSError("memcached_remap: you should pass a configuration file as argument to plugin with list of servers.\n");
+ return;
+ }
+
+ fp = fopen(argv[0], "r");
+ if(!fp) {
+ TSError("memcached_remap: Failed to open the configuration file %s\n", argv[0]);
+ return;
+ }
+
+ while(!feof(fp)) {
+ fscanf(fp,"servers=%[^\n] ", servers_string);
+ }
+
+ fclose(fp);
+ */
+
+ // initialize the memcache
+ //fp = NULL;
+ //snprintf(servers_string, 1,"%c",'h');
+ memc = memcached_create(NULL);
+
+ //servers = memcached_servers_parse(servers_string);
+
+ servers = memcached_server_list_append(NULL, "localhost", 11211, &rc);
+ if (rc != MEMCACHED_SUCCESS) {
+ TSError
+ ("memcached_remap: plugin registration failed while adding servers.\n");
+ return;
+ }
+
+ rc = memcached_server_push(memc, servers);
+ if (rc != MEMCACHED_SUCCESS) {
+ TSError
+ ("memcached_remap: plugin registration failed while adding to pool.\n");
+ return;
+ }
+
+ TSCont cont = TSContCreate(memcached_remap, TSMutexCreate());
+
+ TSHttpHookAdd(TS_HTTP_READ_REQUEST_HDR_HOOK, cont);
+
+ TSDebug(PLUGIN_NAME,
+ "plugin is succesfully initialized [plugin mode]");
+ return;
+}
http://git-wip-us.apache.org/repos/asf/trafficserver-plugins/blob/cbcc5599/memcached_remap/sample.py
----------------------------------------------------------------------
diff --git a/memcached_remap/sample.py b/memcached_remap/sample.py
new file mode 100755
index 0000000..555d9ed
--- /dev/null
+++ b/memcached_remap/sample.py
@@ -0,0 +1,18 @@
+#!/usr/bin/python
+
+# Author: opensource@navyaprabha.com
+# Description: Sample script to add keys to memcached for use with YTS/memcached_remap plugin
+
+import memcache
+
+# connect to local server
+mc = memcache.Client(['127.0.0.1:11211'], debug=0)
+
+# Add couple of keys
+mc.set("http://127.0.0.1:80/", "http://127.0.0.1:8080");
+mc.set("http://localhost:80/", "http://localhost:8080");
+
+# Print the keys that are saved
+print "response-1 is '%s'" %(mc.get("http://127.0.0.1:80/"))
+print "response-2 is '%s'" %(mc.get("http://localhost:80/"))
+