Mercurial > hg > webserver / changelog

improves cgi error handling and allows requests with empty headers

• Sat, 28 Jan 2017 10:38:34 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 28 Jan 2017 10:38:34 +0100] rev 162
• improves cgi error handling and allows requests with empty headers
  
  also fixes broken windows porting commit

more windows porting

• Thu, 26 Jan 2017 18:53:52 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 26 Jan 2017 18:53:52 +0100] rev 161
• more windows porting

adds set-variable error

• Thu, 26 Jan 2017 17:23:11 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 26 Jan 2017 17:23:11 +0100] rev 160
• adds set-variable error

makes EventHandler public aio

• Wed, 25 Jan 2017 19:19:47 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 25 Jan 2017 19:19:47 +0100] rev 159
• makes EventHandler public

adds reconfig and shutdown handler to srvctrl srvctrl

• Wed, 25 Jan 2017 11:50:19 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 25 Jan 2017 11:50:19 +0100] rev 158
• adds reconfig and shutdown handler to srvctrl

adds pblock operations to set-variable saf

• Tue, 24 Jan 2017 23:19:48 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 24 Jan 2017 23:19:48 +0100] rev 157
• adds pblock operations to set-variable saf

adds unix domain socket for server control ops srvctrl

• Tue, 24 Jan 2017 22:48:14 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 24 Jan 2017 22:48:14 +0100] rev 156
• adds unix domain socket for server control ops

merge

• Tue, 24 Jan 2017 17:36:28 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 24 Jan 2017 17:36:28 +0100] rev 155
• merge

adds set-variable saf

• Tue, 24 Jan 2017 17:36:04 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 24 Jan 2017 17:36:04 +0100] rev 154
• adds set-variable saf
  
  most features of this saf are still not implemented

fixes solaris build

• Sat, 21 Jan 2017 17:05:23 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 21 Jan 2017 17:05:23 +0100] rev 153
• fixes solaris build

improves sessionhandler logging

• Sat, 21 Jan 2017 16:40:59 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 21 Jan 2017 16:40:59 +0100] rev 152
• improves sessionhandler logging

adds more error handling and logging to send_cgi

• Sat, 21 Jan 2017 15:31:17 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 21 Jan 2017 15:31:17 +0100] rev 151
• adds more error handling and logging to send_cgi

fixes socket fd leak when SSL_accept fails

• Sat, 21 Jan 2017 12:46:31 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 21 Jan 2017 12:46:31 +0100] rev 150
• fixes socket fd leak when SSL_accept fails

fixes cgi cleanup

• Mon, 16 Jan 2017 14:41:20 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 16 Jan 2017 14:41:20 +0100] rev 149
• fixes cgi cleanup

removes some unused stuff

• Sun, 15 Jan 2017 18:27:09 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 15 Jan 2017 18:27:09 +0100] rev 148
• removes some unused stuff

ported io.c and some headers to windows

• Sun, 15 Jan 2017 17:53:16 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 15 Jan 2017 17:53:16 +0100] rev 147
• ported io.c and some headers to windows

fixes server user init

• Sat, 14 Jan 2017 11:27:55 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 14 Jan 2017 11:27:55 +0100] rev 146
• fixes server user init

fixes memory leaks in request_stat_path and send_cgi

• Fri, 13 Jan 2017 09:53:55 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 13 Jan 2017 09:53:55 +0100] rev 145
• fixes memory leaks in request_stat_path and send_cgi

fixes cgi fd leak

• Sat, 31 Dec 2016 18:05:40 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 31 Dec 2016 18:05:40 +0100] rev 144
• fixes cgi fd leak

fixes some acl safs

• Fri, 30 Dec 2016 19:43:41 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 30 Dec 2016 19:43:41 +0100] rev 143
• fixes some acl safs

adds new a pathcheck saf and improves content type matchin and improves content type matching

• Fri, 30 Dec 2016 18:47:26 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 30 Dec 2016 18:47:26 +0100] rev 142
• adds new a pathcheck saf and improves content type matchin and improves content type matching

many fixes

• Fri, 30 Dec 2016 14:15:52 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 30 Dec 2016 14:15:52 +0100] rev 141
• many fixes
  
  fixes pathcheck with more than one saf
  fixes log config
  acl_evaluate sets auth vars now
  fixes session ssl flag
  cgi sets https env
  require_access saf fix

fixes missing FuncStruct initialization in load_modules

• Thu, 29 Dec 2016 10:15:43 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 29 Dec 2016 10:15:43 +0100] rev 140
• fixes missing FuncStruct initialization in load_modules

fixes some memory errors and startup with broken config

• Wed, 28 Dec 2016 17:27:14 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 28 Dec 2016 17:27:14 +0100] rev 139
• fixes some memory errors and startup with broken config

using host header to select virtual server

• Wed, 28 Dec 2016 12:23:51 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 28 Dec 2016 12:23:51 +0100] rev 138
• using host header to select virtual server

adds redirect saf

• Tue, 27 Dec 2016 19:50:20 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 19:50:20 +0100] rev 137
• adds redirect saf

adds simple rewrite saf

• Tue, 27 Dec 2016 19:36:19 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 19:36:19 +0100] rev 136
• adds simple rewrite saf

ucx update

• Tue, 27 Dec 2016 18:42:36 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 18:42:36 +0100] rev 135
• ucx update

adds blockingio config

• Tue, 27 Dec 2016 17:54:00 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 17:54:00 +0100] rev 134
• adds blockingio config

improves event handler and ssl error handling

• Tue, 27 Dec 2016 17:19:00 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 17:19:00 +0100] rev 133
• improves event handler and ssl error handling

fixes broken error response

• Tue, 27 Dec 2016 14:02:28 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 14:02:28 +0100] rev 132
• fixes broken error response

adds find-index saf

• Tue, 27 Dec 2016 13:12:32 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 13:12:32 +0100] rev 131
• adds find-index saf

adds ssl protocol configuration

• Tue, 27 Dec 2016 11:16:39 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 27 Dec 2016 11:16:39 +0100] rev 130
• adds ssl protocol configuration

adds support for ssl cert chain files and improves ssl error handling

• Mon, 26 Dec 2016 16:46:55 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 26 Dec 2016 16:46:55 +0100] rev 129
• adds support for ssl cert chain files and improves ssl error handling

fixes ssl shutdown

• Mon, 26 Dec 2016 15:34:44 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 26 Dec 2016 15:34:44 +0100] rev 128
• fixes ssl shutdown

adds minimal websocket implementation

• Mon, 26 Dec 2016 14:00:10 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 26 Dec 2016 14:00:10 +0100] rev 127
• adds minimal websocket implementation

fixes chunked transfer encoding

• Sun, 30 Oct 2016 11:44:04 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 30 Oct 2016 11:44:04 +0100] rev 126
• fixes chunked transfer encoding

adds more error handling

• Sun, 30 Oct 2016 10:22:00 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 30 Oct 2016 10:22:00 +0100] rev 125
• adds more error handling

using the status code from cgi output now

• Sat, 29 Oct 2016 21:04:10 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 29 Oct 2016 21:04:10 +0200] rev 124
• using the status code from cgi output now

fixes CGI response headers

• Sat, 29 Oct 2016 20:33:46 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 29 Oct 2016 20:33:46 +0200] rev 123
• fixes CGI response headers

lol

• Sat, 29 Oct 2016 20:22:32 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 29 Oct 2016 20:22:32 +0200] rev 122
• lol

adds more CGI stuff

• Sat, 29 Oct 2016 20:02:26 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 29 Oct 2016 20:02:26 +0200] rev 121
• adds more CGI stuff
  
  sets more env vars
  fixes response parser
  NSAPIRequest contains host and port now

adds chdir before cgi execution

• Fri, 28 Oct 2016 19:29:38 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 28 Oct 2016 19:29:38 +0200] rev 120
• adds chdir before cgi execution

adds support for CGI with request bodies

• Thu, 27 Oct 2016 16:56:00 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 27 Oct 2016 16:56:00 +0200] rev 119
• adds support for CGI with request bodies

adds minimal cgi implementation

• Wed, 26 Oct 2016 15:53:56 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 26 Oct 2016 15:53:56 +0200] rev 118
• adds minimal cgi implementation
  
  some env vars still missing
  request body not supported yet

fixes nametrans

• Sun, 23 Oct 2016 11:12:12 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 23 Oct 2016 11:12:12 +0200] rev 117
• fixes nametrans

adds find-pathinfo saf

• Sun, 23 Oct 2016 10:52:54 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 23 Oct 2016 10:52:54 +0200] rev 116
• adds find-pathinfo saf
  
  nametrans sets ntrans-base when possible
  using path instead of ppath after nametrans

improves logging

• Sat, 22 Oct 2016 11:27:39 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 22 Oct 2016 11:27:39 +0200] rev 115
• improves logging
  
  replaces some printf calls with log_ereport
  in non-daemon mode, log output is also written to stdout

fixed keep alive bug

• Wed, 10 Feb 2016 12:19:56 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 10 Feb 2016 12:19:56 +0100] rev 114
• fixed keep alive bug

fixed Solaris 11 build

• Tue, 09 Feb 2016 22:53:59 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 09 Feb 2016 22:53:59 +0100] rev 113
• fixed Solaris 11 build

merge

• Tue, 10 Nov 2015 21:18:51 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 10 Nov 2015 21:18:51 +0100] rev 112
• merge

fixed NetBSD build and an uninitialized struct member

• Mon, 02 Nov 2015 11:13:38 +0000
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 02 Nov 2015 11:13:38 +0000] rev 111
• fixed NetBSD build and an uninitialized struct member

refactored IO system

• Tue, 10 Nov 2015 21:11:06 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 10 Nov 2015 21:11:06 +0100] rev 110
• refactored IO system

experimental BSD support

• Sat, 31 Oct 2015 20:10:21 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 31 Oct 2015 20:10:21 +0100] rev 109
• experimental BSD support

fixed ssl

• Sat, 31 Oct 2015 18:02:07 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 31 Oct 2015 18:02:07 +0100] rev 108
• fixed ssl

removed old webdav and expression code

• Sat, 31 Oct 2015 16:39:12 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 31 Oct 2015 16:39:12 +0100] rev 107
• removed old webdav and expression code

added minimal ssl support

• Sat, 31 Oct 2015 15:01:07 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 31 Oct 2015 15:01:07 +0100] rev 106
• added minimal ssl support

using readdir_r instead of readdir

• Wed, 28 Oct 2015 17:59:34 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 28 Oct 2015 17:59:34 +0100] rev 105
• using readdir_r instead of readdir

implemented range requests

• Fri, 23 Oct 2015 17:28:09 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 23 Oct 2015 17:28:09 +0200] rev 104
• implemented range requests

added date header to response

• Sat, 17 Oct 2015 23:05:23 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 17 Oct 2015 23:05:23 +0200] rev 103
• added date header to response

added etag and conditional request implementation from Open Web Server

• Sat, 17 Oct 2015 22:24:38 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 17 Oct 2015 22:24:38 +0200] rev 102
• added etag and conditional request implementation from Open Web Server

added support for absolute URIs and improved keep alive

• Sat, 17 Oct 2015 21:17:34 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 17 Oct 2015 21:17:34 +0200] rev 101
• added support for absolute URIs and improved keep alive

fixed solaris build

• Sat, 17 Oct 2015 18:07:04 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 17 Oct 2015 18:07:04 +0200] rev 100
• fixed solaris build

ucx update

• Fri, 16 Oct 2015 19:23:49 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 16 Oct 2015 19:23:49 +0200] rev 99
• ucx update

solaris makefile fixes

• Mon, 06 Apr 2015 16:36:25 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 06 Apr 2015 16:36:25 +0200] rev 98
• solaris makefile fixes

added ldap group support

• Sun, 17 Aug 2014 15:15:32 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 17 Aug 2014 15:15:32 +0200] rev 97
• added ldap group support

added document-root and pfx2dir nametrans safs

• Mon, 04 Nov 2013 10:55:27 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 04 Nov 2013 10:55:27 +0100] rev 96
• added document-root and pfx2dir nametrans safs

added error directive for custom error pages

• Sun, 03 Nov 2013 16:41:42 +0100
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 03 Nov 2013 16:41:42 +0100] rev 95
• added error directive for custom error pages

minor fixes in snprintf and build system

• Mon, 14 Oct 2013 13:36:28 +0200
• by Mike Becker <universe@uap-core.de> [Mon, 14 Oct 2013 13:36:28 +0200] rev 94
• minor fixes in snprintf and build system

fixed solaris build

• Mon, 09 Sep 2013 12:15:54 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 09 Sep 2013 12:15:54 +0200] rev 93
• fixed solaris build

fixed some includes

• Mon, 09 Sep 2013 11:55:14 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 09 Sep 2013 11:55:14 +0200] rev 92
• fixed some includes

ucx update

• Sun, 08 Sep 2013 23:27:07 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 08 Sep 2013 23:27:07 +0200] rev 91
• ucx update

load_modules supports nsapi module init functions

• Wed, 31 Jul 2013 13:02:06 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 31 Jul 2013 13:02:06 +0200] rev 90
• load_modules supports nsapi module init functions

fixed solaris build

• Wed, 31 Jul 2013 11:35:57 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 31 Jul 2013 11:35:57 +0200] rev 89
• fixed solaris build

ucx update

• Tue, 16 Jul 2013 12:14:13 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 16 Jul 2013 12:14:13 +0200] rev 88
• ucx update

fixed pathcheck behavior

• Thu, 11 Jul 2013 14:21:23 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 11 Jul 2013 14:21:23 +0200] rev 87
• fixed pathcheck behavior

replaced usage of deprecated openldap functions

• Tue, 09 Jul 2013 20:56:01 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 09 Jul 2013 20:56:01 +0200] rev 86
• replaced usage of deprecated openldap functions

replaced propfind parser with new libxml2 parser

• Tue, 09 Jul 2013 17:16:26 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 09 Jul 2013 17:16:26 +0200] rev 85
• replaced propfind parser with new libxml2 parser

added initial java plugin code

• Mon, 08 Jul 2013 11:10:54 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 08 Jul 2013 11:10:54 +0200] rev 84
• added initial java plugin code

added minimal nsapi conditions

• Mon, 01 Jul 2013 18:05:13 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 01 Jul 2013 18:05:13 +0200] rev 83
• added minimal nsapi conditions

added some nsapi stuff

• Sun, 30 Jun 2013 15:11:48 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 30 Jun 2013 15:11:48 +0200] rev 82
• added some nsapi stuff

preparation for admin interface

• Fri, 28 Jun 2013 14:52:35 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 28 Jun 2013 14:52:35 +0200] rev 81
• preparation for admin interface

fixed chunked transfer encoding

• Wed, 26 Jun 2013 17:14:45 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 26 Jun 2013 17:14:45 +0200] rev 80
• fixed chunked transfer encoding

fixed some memory leaks

• Wed, 26 Jun 2013 15:09:54 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Wed, 26 Jun 2013 15:09:54 +0200] rev 79
• fixed some memory leaks

added keep-alive support

• Tue, 25 Jun 2013 22:18:59 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 25 Jun 2013 22:18:59 +0200] rev 78
• added keep-alive support

some fixes

• Tue, 25 Jun 2013 15:45:13 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Tue, 25 Jun 2013 15:45:13 +0200] rev 77
• some fixes

removed config.mk

• Mon, 24 Jun 2013 14:41:32 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 24 Jun 2013 14:41:32 +0200] rev 76
• removed config.mk

merge

• Sun, 23 Jun 2013 13:51:49 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 23 Jun 2013 13:51:49 +0200] rev 75
• merge

listeners can be dynamically added

• Sun, 23 Jun 2013 13:49:17 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 23 Jun 2013 13:49:17 +0200] rev 74
• listeners can be dynamically added

added file system ACLs for linux

• Sat, 22 Jun 2013 13:54:41 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 22 Jun 2013 13:54:41 +0200] rev 73
• added file system ACLs for linux

some fixes

• Sat, 22 Jun 2013 13:08:36 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sat, 22 Jun 2013 13:08:36 +0200] rev 72
• some fixes

ucx update

• Fri, 21 Jun 2013 12:10:44 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Fri, 21 Jun 2013 12:10:44 +0200] rev 71
• ucx update

fixed some warnings

• Thu, 20 Jun 2013 14:07:46 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 20 Jun 2013 14:07:46 +0200] rev 70
• fixed some warnings

compiles on os x

• Thu, 20 Jun 2013 13:27:07 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Thu, 20 Jun 2013 13:27:07 +0200] rev 69
• compiles on os x

some fixes for mod_jk

• Mon, 27 May 2013 12:28:56 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Mon, 27 May 2013 12:28:56 +0200] rev 68
• some fixes for mod_jk

dynamic thread pool

• Sun, 26 May 2013 22:05:41 +0200
• by Olaf Wintermann <olaf.wintermann@gmail.com> [Sun, 26 May 2013 22:05:41 +0200] rev 67
• dynamic thread pool