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Diffstat (limited to 'lib/gitlab/sherlock/middleware.rb')
-rw-r--r-- | lib/gitlab/sherlock/middleware.rb | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/gitlab/sherlock/middleware.rb b/lib/gitlab/sherlock/middleware.rb new file mode 100644 index 00000000000..687332fc5fc --- /dev/null +++ b/lib/gitlab/sherlock/middleware.rb @@ -0,0 +1,41 @@ +module Gitlab + module Sherlock + # Rack middleware used for tracking request metrics. + class Middleware + CONTENT_TYPES = /text\/html|application\/json/i + + IGNORE_PATHS = %r{^/sherlock} + + def initialize(app) + @app = app + end + + # env - A Hash containing Rack environment details. + def call(env) + if instrument?(env) + call_with_instrumentation(env) + else + @app.call(env) + end + end + + def call_with_instrumentation(env) + trans = transaction_from_env(env) + retval = trans.run { @app.call(env) } + + Sherlock.collection.add(trans) + + retval + end + + def instrument?(env) + !!(env['HTTP_ACCEPT'] =~ CONTENT_TYPES && + env['REQUEST_URI'] !~ IGNORE_PATHS) + end + + def transaction_from_env(env) + Transaction.new(env['REQUEST_METHOD'], env['REQUEST_URI']) + end + end + end +end |