github.com/urfave/negroni

Added

• With() helper for building a new Negroni struct chaining handlers from
  existing Negroni structs
• Format log output in Logger middleware via a configurable text/template
  string injectable via .SetFormat. Added LoggerDefaultFormat and
  LoggerDefaultDateFormat to configure the default template and date format
  used by the Logger middleware.
• Support for HTTP/2 pusher support via http.Pusher interface for Go 1.8+.
• WrapFunc to convert http.HandlerFunc into a negroni.Handler
• Formatter field added to Recovery middleware to allow configuring how
  panics are output. Default of TextFormatter (how it was output in
  0.2.0) used. HTMLPanicFormatter also added to allow easy outputing of
  panics as HTML.

Fixed

• Written() correct returns false if no response header has been written
• Only implement http.CloseNotifier with the negroni.ResponseWriter if the
  underlying http.ResponseWriter implements it (previously would always
  implement it and panic if the underlying http.ResponseWriter did not.

Changed

• Set default status to 0 in the case that no handler writes status -- was
  previously 200 (in 0.2.0, before that it was 0 so this reestablishes that
  behavior)
• Catch panics thrown by callbacks provided to the Recovery handler
• Recovery middleware will set text/plain content-type if none is set
• ALogger interface to allow custom logger outputs to be used with the
  Logger middleware. Changes embeded field in negroni.Logger from Logger
  to ALogger.
• Default Logger middleware output changed to be more structure and verbose
  (also now configurable, see Added)
• Automatically bind to port specified in $PORT in .Run() if an address is
  not passed in. Fall back to binding to :8080 if no address specified
  (configuable via DefaultAddress).
• PanicHandlerFunc added to Recovery middleware to enhance custom handling
  of panics by providing additional information to the handler including the
  stack and the http.Request. Recovery.ErrorHandlerFunc was also added, but
  deprecated in favor of the new PanicHandlerFunc.