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# frozen_string_literal: true
module Gitlab
module Metrics
class RequestsRackMiddleware
HTTP_METHODS = {
"delete" => %w(200 202 204 303 400 401 403 404 410 422 500 503),
"get" => %w(200 204 301 302 303 304 307 400 401 403 404 410 412 422 429 500 503),
"head" => %w(200 204 301 302 303 304 400 401 403 404 410 429 500 503),
"options" => %w(200 404),
"patch" => %w(200 202 204 400 403 404 409 416 422 500),
"post" => %w(200 201 202 204 301 302 303 304 400 401 403 404 406 409 410 412 413 415 422 429 500 503),
"propfind" => %w(404),
"put" => %w(200 202 204 400 401 403 404 405 406 409 410 415 422 500),
"report" => %w(404)
}.freeze
def initialize(app)
@app = app
end
def self.http_request_total
@http_request_total ||= ::Gitlab::Metrics.counter(:http_requests_total, 'Request count')
end
def self.rack_uncaught_errors_count
@rack_uncaught_errors_count ||= ::Gitlab::Metrics.counter(:rack_uncaught_errors_total, 'Request handling uncaught errors count')
end
def self.http_request_duration_seconds
@http_request_duration_seconds ||= ::Gitlab::Metrics.histogram(:http_request_duration_seconds, 'Request handling execution time',
{}, [0.05, 0.1, 0.25, 0.5, 0.7, 1, 2.5, 5, 10, 25])
end
def self.initialize_http_request_duration_seconds
HTTP_METHODS.each do |method, statuses|
statuses.each do |status|
http_request_duration_seconds.get({ method: method, status: status.to_s })
end
end
end
def call(env)
method = env['REQUEST_METHOD'].downcase
started = Time.now.to_f
begin
RequestsRackMiddleware.http_request_total.increment(method: method)
status, headers, body = @app.call(env)
elapsed = Time.now.to_f - started
RequestsRackMiddleware.http_request_duration_seconds.observe({ method: method, status: status.to_s }, elapsed)
[status, headers, body]
rescue
RequestsRackMiddleware.rack_uncaught_errors_count.increment
raise
end
end
end
end
end
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