I'm having trouble figuring out how to log messages with Sinatra. I'm not looking to log requests, but rather custom messages at certain points in my app. For example, when fetching a URL I would like to log "Fetching #{url}".
Here's what I'd like:
- The ability to specify log levels (ex:
logger.info("Fetching #{url}")) - In development and testing environments, the messages would be written to the console.
- In production, only write out messages matching the current log level.
I'm guessing this can easily be done in config.ru, but I'm not 100% sure which setting I want to enable, and if I have to manually create a Logger object myself (and furthermore, which class of Logger to use: Logger, Rack::Logger, or Rack::CommonLogger).
(I know there are similar questions on StackOverflow, but none seem to directly answer my question. If you can point me to an existing question, I will mark this one as a duplicate).
Answer
Sinatra 1.3 will ship with such a logger object, exactly usable as above. You can use edge Sinatra as described in "The Bleeding Edge". Won't be that long until we'll release 1.3, I guess.
To use it with Sinatra 1.2, do something like this:
require 'sinatra'
use Rack::Logger
helpers do
def logger
request.logger
end
end