= ApacheLogProcessor * http://uwruby.com/2009/04/hello-here-is-your-week-4-homework/ == DESCRIPTION: An apache log processor. For this project you will: * Provide a commandline tool that safely modifies files * Change IP Address at the beginning of the line in an Apache logfile * Must be multithreaded * Must maintain log order * Cache name lookups across invocations * Age the cache items (expire lookups) * Commandline option to limit number of threads (you should determine a sensible default) * Look at “resolv” for DNS lookups * This homework can be completed using only tools from ruby’s standard library The file format will look like this: 208.77.188.166 - - [29/Apr/2009:16:07:38 -0700] "GET / HTTP/1.1" 200 1342 75.119.201.189 - - [29/Apr/2009:16:07:44 -0700] "GET /favicon.ico HTTP/1.1" 200 1406 75.146.57.34 - - [29/Apr/2009:16:08:38 -0700] "GET / HTTP/1.1" 304 - 75.119.201.189 - - [29/Apr/2009:16:09:53 -0700] "GET / HTTP/1.1" 200 1340 208.77.188.166 - - [29/Apr/2009:16:11:51 -0700] "GET / HTTP/1.1" 304 - 75.146.57.34 - - [29/Apr/2009:16:12:00 -0700] "GET / HTTP/1.1" 304 - 75.119.201.189 - - [29/Apr/2009:16:13:15 -0700] "GET / HTTP/1.1" 304 - 208.77.188.166 - - [29/Apr/2009:16:13:15 -0700] "GET / HTTP/1.1" 304 - 75.119.201.189 - - [29/Apr/2009:16:13:17 -0700] "GET / HTTP/1.1" 304 - 75.146.57.34 - - [29/Apr/2009:16:13:50 -0700] "GET / HTTP/1.1" 200 1294 75.146.57.34 - - [29/Apr/2009:16:13:55 -0700] "GET /stylesheets/main.css?1240264242 HTTP/1.1" 200 2968 74.125.67.100 - - [29/Apr/2009:16:13:55 -0700] "GET /stylesheets/home.css?1240264242 HTTP/1.1" 200 7829 We want the file to end up looking like this: example.com - - [29/Apr/2009:16:07:38 -0700] "GET / HTTP/1.1" 200 1342 example.com - - [29/Apr/2009:16:07:44 -0700] "GET /favicon.ico HTTP/1.1" 200 1406 example.com - - [29/Apr/2009:16:08:38 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:09:53 -0700] "GET / HTTP/1.1" 200 1340 example.com - - [29/Apr/2009:16:11:51 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:12:00 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:13:15 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:13:15 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:13:17 -0700] "GET / HTTP/1.1" 304 - example.com - - [29/Apr/2009:16:13:50 -0700] "GET / HTTP/1.1" 200 1294 example.com - - [29/Apr/2009:16:13:55 -0700] "GET /stylesheets/main.css?1240264242 HTTP/1.1" 200 2968 example.com - - [29/Apr/2009:16:13:55 -0700] "GET /stylesheets/home.css?1240264242 HTTP/1.1" 200 7829 These domain names aren’t correct, but your output format should be similar. Here is an example session using the command line tool you will write for your homework: $ apache_lookup my_logs.log After execution you should be able to examine my_logs.log and see that the ip addresses have been replaced with domain names. You should also be able to do this: $ apache_lookup -t 100 my_logs.log The above execution should spawn 100 threads to process your logfile. This homework MUST be test driven. We will dock points for non-test driven code. You MUST turn your homework in as a tar.gz or as a gem. Remember to email the mailing list, use IRC, start early, test all the time, and have fun! == FEATURES/PROBLEMS: * Multi-threaded * Maintains log order * Caches name lookups across invocations * Customizable thread count == SYNOPSIS: Regular usage: $ apache_lookup my_logs.log Thread count specified: $ apache_lookup -t 100 my_logs.log == REQUIREMENTS: * No special gems. Just Ruby standard library. == INSTALL: * N/A == LICENSE: (The MIT License) Copyright (c) 2009 Peter Held 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.
pheld/ApacheLogProcessor
multi-threaded command line tool for replacing IP addresses with names in Apache log files
Ruby