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module Rack
# Rack::CommonLogger forwards every request to an +app+ given, and
# logs a line in the Apache common log format to the +logger+, or
# rack.errors by default.
class CommonLogger
def initialize(app, logger=nil)
@app = app
@logger = logger
end
def call(env)
dup._call(env)
end
def _call(env)
@env = env
@logger ||= self
@time = Time.now
@status, @header, @body = @app.call(env)
[@status, @header, self]
end
def close
@body.close if @body.respond_to? :close
end
# By default, log to rack.errors.
def <<(str)
@env["rack.errors"].write(str)
@env["rack.errors"].flush
end
def each
length = 0
@body.each { |part|
length += part.size
yield part
}
@now = Time.now
# Common Log Format: http://httpd.apache.org/docs/1.3/logs.html#common
# lilith.local - - [07/Aug/2006 23:58:02] "GET / HTTP/1.1" 500 -
# %{%s - %s [%s] "%s %s%s %s" %d %s\n} %
@logger << %{%s - %s [%s] "%s %s%s %s" %d %s %0.4f\n} %
[
@env['HTTP_X_FORWARDED_FOR'] || @env["REMOTE_ADDR"] || "-",
@env["REMOTE_USER"] || "-",
@now.strftime("%d/%b/%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.zero? ? "-" : length.to_s),
@now - @time
]
end
end
end
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