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@ik5 ik5/kernel.rb
Created Oct 6, 2014

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rack log format
module Kernel
def suppress_warnings
original_verbosity = $VERBOSE
$VERBOSE = nil
result = yield
$VERBOSE = original_verbosity
return result
end
end
module Rack
class CommonLogger
Kernel::suppress_warnings do
# Overriding the original constant
FORMAT = %{%s - %s [%s] "%s %s%s %s" %d %s %0.4f\n}
end
def initialize(app, logger=nil)
@app = app
@logger = logger
end
def call(env)
began_at = Time.now
status, header, body = @app.call(env)
header = Utils::HeaderHash.new(header)
log(env, status, header, began_at)
[status, header, body]
end
private
def log(env, status, header, began_at)
now = Time.now
length = extract_content_length(header)
logger = @logger || env['rack.errors']
logger.write FORMAT % [
env['HTTP_X_REAL_IP'] || env['HTTP_X_FORWARDED_FOR'] || env["REMOTE_ADDR"] || "-",
env["REMOTE_USER"] || "-",
now.strftime("%d/%m/%Y %H:%M:%S"),
env["REQUEST_METHOD"],
env["PATH_INFO"],
env["QUERY_STRING"].empty? ? "" : "?"+env["QUERY_STRING"],
env["HTTP_VERSION"],
status.to_s[0..3],
length,
now - began_at ]
end
def extract_content_length(headers)
value = headers['Content-Length'] or return '-'
value.to_s == '0' ? '-' : value
end
end
end
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