Website visited statistics

For counting the visited amount, first of all, add one configuration in config/environment.rb
RAILS_DEFAULT_LOGGER = Logger.new("#{RAILS_ROOT}/log/#{RAILS_ENV}.log", "daily")

1. get the request statistics
cat production.log.20070702|grep "200 OK"|wc -l

2. get the URL visited statistics
cat production.log.20070702 | grep "200 OK" | awk '{print $17}'|sort|uniq -c | sort -r -n > stat.log

RoR: lighttpd proxy setting

For accessing other servers' resources transparently, setting up the web server to support reverse proxy.

In lighttpd, the steps:
1. add 'mod_proxy' in server module group;
2. set up the server as:
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$HTTP["host"] == "rails.qiang.com" {
server.document-root = "/rails/sample/public"
url.rewrite = ( "^/$" => "index.html", "^([^.]+)$" => "$1.html" )
server.error-handler-404 = "/dispatch.fcgi"
server.errorlog = "/rails/sample/lighttpd.log"
fastcgi.server = ( ".fcgi" =>
( "localhost" =>
(
"min-procs" => 2,
"max-procs" => 4,
"socket" => "/tmp/stage-fcgi.socket",
"bin-path" => "/rails/sample/public/dispatch.fcgi",
"bin-environment" => ("RAILS_ENV" => "rail")
)
))

proxy.server = ( "/other" => ( "other" => ("host" => "1.1.1.1/other", "port" => 80)))
}
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For apache, please read the followed link: http://www.apachetutor.org/admin/reverseproxies.

RoR: unexpected nil when trying to parse a query string

While sending a HTTP post message that contains a substring '&&' in the body to a ruby on rails application, there is a error reported:

==================================================
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.include?
/public/../config/../vendor/rails/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb:49:in `parse_request_parameters'
/public/../config/../vendor/rails/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb:47:in `parse_request_parameters'
/public/../config/../vendor/rails/actionpack/lib/action_controller/cgi_process.rb:71:in `request_parameters'
/public/../config/../vendor/rails/actionpack/lib/action_controller/request.rb:13:in `parameters'
/public/../config/../vendor/rails/actionpack/lib/action_controller/session_management.rb:122:in `set_session_options_without_components'
/public/../config/../vendor/rails/actionpack/lib/action_controller/components.rb:178:in `set_session_options'
/public/../config/../vendor/rails/actionpack/lib/action_controller/session_management.rb:116:in `process'
/public/../config/../vendor/rails/railties/lib/dispatcher.rb:38:in `dispatch'
/public/../config/../vendor/rails/railties/lib/fcgi_handler.rb:150:in `process_request'
/public/../config/../vendor/rails/railties/lib/fcgi_handler.rb:54:in `process!'
/usr/lib/ruby/site_ruby/1.8/fcgi.rb:612:in `each_cgi'
/usr/lib/ruby/site_ruby/1.8/fcgi.rb:609:in `each_cgi'
/public/../config/../vendor/rails/railties/lib/fcgi_handler.rb:53:in `process!'
/public/../config/../vendor/rails/railties/lib/fcgi_handler.rb:23:in `process!'
/public/dispatch.fcgi:24
==================================================

The error occurred because '&' is the separator of different name/value pair in a message body, such as "name1=value1&name2=value2", and rails framework doesn't handle the string "&&" properly. According to a bug report and its patch in rubyonrails.org (http://dev.rubyonrails.org/ticket/5714), we need to change "/vendor/rails/actionpack/lib/action_controller/cgi_ext/cgi_methods.rb" line 47 from

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for key, value in params
value = [value] if key =~ /.*\[\]$/
unless key.include?('[')
# much faster to test for the most common case first (GET)
# and avoid the call to build_deep_hash
parsed_params[key] = get_typed_value(value[0])
else
build_deep_hash(get_typed_value(value[0]), parsed_params, get_levels(key))
end
end
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to

==================================================
for key, value in params
if (not key.nil?)
value = [value] if key =~ /.*\[\]$/
unless key.include?('[')
# much faster to test for the most common case first (GET)
# and avoid the call to build_deep_hash
parsed_params[key] = get_typed_value(value[0])
else
build_deep_hash(get_typed_value(value[0]), parsed_params, get_levels(key))
end
end
end
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