DNS resolver for asyncio.

  https://pypi.python.org/pypi/aiodns

  The library for writing single-threaded concurrent code using
  coroutines, multiplexing I/O access over sockets and other
  resources, running network clients and servers, and other
  related primitives.

  Reference implementation of :pep:`3156`

  https://pypi.python.org/pypi/asyncio/

  Brotli is a generic-purpose lossless compression algorithm that
  compresses data using a combination of a modern variant
  of the LZ77 algorithm, Huffman coding and second order context modeling,
  with a compression ratio comparable to the best currently available
  general-purpose compression methods. It is similar in speed with deflate
  but offers more dense compression.

  The specification of the Brotli Compressed Data Format is defined :rfc:`7932`

  https://pypi.org/project/Brotli/

  An alternative implementation of :term:`Brotli` built using the CFFI
  library. This implementation supports PyPy correctly.

  https://pypi.org/project/brotlicffi/

  Any object that can be called. Use :func:`callable` to check
  that.

   Gunicorn 'Green Unicorn' is a Python WSGI HTTP Server for
   UNIX.

   http://gunicorn.org/

   An Internationalized Domain Name in Applications (IDNA) is an
   industry standard for encoding Internet Domain Names that contain in
   whole or in part, in a language-specific script or alphabet,
   such as Arabic, Chinese, Cyrillic, Tamil, Hebrew or the Latin
   alphabet-based characters with diacritics or ligatures, such as
   French. These writing systems are encoded by computers in
   multi-byte Unicode. Internationalized domain names are stored
   in the Domain Name System as ASCII strings using Punycode
   transcription.

   A technique for communicating between HTTP client and server
   when connection is not closed after sending response but kept
   open for sending next request through the same socket.

   It makes communication faster by getting rid of connection
   establishment for every request.

  Nginx [engine x] is an HTTP and reverse proxy server, a mail
  proxy server, and a generic TCP/UDP proxy server.

  https://nginx.org/en/

  A mechanism for encoding information in a Uniform Resource
  Locator (URL) if URL parts don't fit in safe characters space.

  Currently the most popular synchronous library to make
  HTTP requests in Python.

  https://requests.readthedocs.io

  Applying :term:`percent-encoding` to non-safe symbols and decode
  percent encoded safe symbols back.

  According to :rfc:`3986` allowed path symbols are::

     allowed       = unreserved / pct-encoded / sub-delims
                     / ":" / "@" / "/"

     pct-encoded   = "%" HEXDIG HEXDIG

     unreserved    = ALPHA / DIGIT / "-" / "." / "_" / "~"

     sub-delims    = "!" / "$" / "&" / "'" / "(" / ")"
                     / "*" / "+" / "," / ";" / "="

  A concept reflects the HTTP **path**, every resource corresponds
  to *URI*.

  May have a unique name.

  Contains :term:`route`\'s for different HTTP methods.

   A part of :term:`resource`, resource's *path* coupled with HTTP method.

   An endpoint that returns HTTP response.

   A protocol providing full-duplex communication channels over a
   single TCP connection. The WebSocket protocol was standardized
   by the IETF as :rfc:`6455`

  A library for operating with URL objects.

  https://pypi.python.org/pypi/yarl

  ``.netrc`` documentation: https://www.gnu.org/software/inetutils/manual/html_node/The-_002enetrc-file.html