Created
September 10, 2013 05:21
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A simple rack to log api performance.
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class APIProfiler | |
def initialize(app, config = {}) | |
@app = app | |
# default print out log to STDOUT, otherwise you can inject rails logger | |
@config = config | |
@config[:logger] = Logger.new(STDOUT) unless config[:logger] | |
@config[:log_level] = :info unless config[:logger_level] | |
@config[:filter] = lambda { false } unless config[:filter] #turn off by default | |
end | |
=begin | |
def initialize(app, config = {}) | |
@app = app | |
@config = config | |
# @config[:size_threshold] = 20000 unless config[:size_threshold] | |
@config[:time_threshold] = 5000 unless config[:time_threshold] | |
# default print out log to STDOUT, otherwise you can inject rails logger | |
@config[:logger] = Logger.new(STDOUT) unless config[:logger] | |
@config[:log_level] = :info unless config[:logger_level] | |
end | |
=end | |
def call(env) | |
dup._call(env) | |
end | |
def _call(env) | |
@status, @headers, @response = @app.call(env) | |
# only time is default setted | |
_log(env) if @config[:filter].call(env, @status, @headers, @response) | |
[@status, @headers, self] | |
end | |
def _log(env) | |
@config[:logger].send @config[:log_level], "!! SLOW | #{@headers['X-Runtime'].to_i} | #{env['REQUEST_METHOD']} | #{env['PATH_INFO']} | #{env['rack.request.form_vars']}" | |
end | |
def each(&block) | |
@response.each(&block) | |
end | |
def to_s | |
end | |
end |
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config.middleware.insert_after ActionController::Failsafe, 'APIProfiler', { | |
:logger => config.logger, | |
:filter => lambda { |env, status, headers, response| headers['X-Runtime'].to_i > 500 } | |
} unless RAILS_ENV == 'production' |
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