Hi all,
Today, I have been working in a tracing facility for Cherokee..
Basically it allows you to define a environment variable which the
definition of what you want to trace. Let's see a few examples
about how it works:
===
# CHEROKEE_TRACE="handler" /usr/sbin/cherokee
handler_redir.c:0244 ( cherokee_handler_redir_new): URL: (null)
handler_redir.c:0087 ( build_regexs_list): Added pattern
"^/projects/(.+)/$"
handler_redir.c:0159 ( match_and_substitute): subject = "/projects/example/"
+ len("")
handler_redir.c:0160 ( match_and_substitute): pcre_exec:
subject="/projects/example/" -> 2
handler_redir.c:0192 ( match_and_substitute): Hidden redirect to:
request="/index.php" query_string="pagename=example"
===
===
# CHEROKEE_TRACE="thread" /usr/sbin/cherokee
thread.c:0524 ( process_active_connections): conn on phase n=3:
Reading header
thread.c:0697 ( process_active_connections): Setup connection begins:
request="/projects/example/"
thread.c:0524 ( process_active_connections): conn on phase n=6:
Setup connection
thread.c:0697 ( process_active_connections): Setup connection begins:
request="/index.php"
thread.c:0524 ( process_active_connections): conn on phase n=7:
Init connection
thread.c:0524 ( process_active_connections): conn on phase n=11:
Lingering close
===
.. and, now let's try with CHEROKEE_TRACE="handler,thread"
===
thread.c:0524 ( process_active_connections): conn on phase n=3:
Reading header
thread.c:0697 ( process_active_connections): Setup connection begins:
request="/projects/example/"
handler_redir.c:0244 ( cherokee_handler_redir_new): URL: (null)
handler_redir.c:0087 ( build_regexs_list): Added pattern
"^/projects/(.+)/$"
handler_redir.c:0159 ( match_and_substitute): subject = "/projects/example/"
+ len("")
handler_redir.c:0160 ( match_and_substitute): pcre_exec:
subject="/projects/example/" -> 2
handler_redir.c:0192 ( match_and_substitute): Hidden redirect to:
request="/index.php" query_string="pagename=example"
thread.c:0524 ( process_active_connections): conn on phase n=6:
Setup connection
thread.c:0697 ( process_active_connections): Setup connection begins:
request="/index.php"
thread.c:0524 ( process_active_connections): conn on phase n=7:
Init connection
thread.c:0524 ( process_active_connections): conn on phase n=11:
Lingering close
===
Pretty handy, don't you think? :-)
Ah, there is an special value "all" which activates all the tracing
check points.
This feature carries a performance penalty for the server, so it is
NOT enabled by default, you will need to compile Cherokee using the
--enable-trace in order to activate it.
--
Greetings, alo.
http://www.alobbs.com
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