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Differences from zope.server

  • Has no non-stdlib dependencies.
  • No support for non-WSGI servers (no FTP, plain-HTTP, etc); refactorings and slight interface changes as a result. Non-WSGI-supporting code removed.
  • Slight cleanup in the way application response headers are handled (no more "accumulated headers").
  • Supports the HTTP 1.1 "expect/continue" mechanism (required by WSGI spec).
  • Calls "close()" on the app_iter object returned by the WSGI application.
  • Allows trusted proxies to override wsgi.url_scheme for particular requests by supplying the X_FORWARDED_PROTO header.
  • Supports an explicit wsgi.url_scheme parameter for ease of deployment behind SSL proxies.
  • Different adjustment defaults (less conservative).
  • Python 3 compatible.
  • More test coverage (unit tests added, functional tests refactored and more added).
  • Supports convenience waitress.serve function (e.g. from waitress import serve; serve(app) and convenience function.
  • Returns a "real" write method from start_response.
  • Provides a getsockname method of the server FBO figuring out which port the server is listening on when it's bound to port 0.
  • Warns when app_iter bytestream numbytes less than or greater than specified Content-Length.
  • Set content-length header if len(app_iter) == 1 and none provided.
  • Raise an exception if start_response isnt called before any body write.
  • channel.write does not accept non-byte-sequences.
  • Put maintenance check on server rather than channel to avoid a class of DOS.
  • wsgi.multiprocess set (correctly) to False.
  • Ensures header total can not exceed a maximum size.
  • Ensures body total can not exceed a maximum size.
  • Broken chunked encoding request bodies don't crash the server.
  • Handles keepalive/pipelining properly (no out of order responses, no premature channel closes).
  • Send a 500 error to the client when a task raises an uncaught exception (with optional traceback rendering via "expose_traceback" adjustment).
  • Supports HTTP/1.1 chunked responses when application doesn't set a Content-Length header.
  • Dont hang a thread up trying to send data to slow clients.
  • Supports wsgi.file_wrapper protocol.