stream_wrapper_example.services.yml

#
# As part of our demo, we implement a simple "file system" that lets us read and
# write files out of the session object. This isn't very practical, but it's a
# simple way to demonstrate what you can do with PHP's stream wrappers.
#
# To get a stream wrapper to work to define a stream wrapper class, we need to
# register that with the system.  We can either do this manually by calling up
# the 'stream_wrapper.manager' service, but the better way to do this is to have
# the system autoload it by tagging the service, as we do here.
#
# We also want to securely serve up our fake session files. We'd like to use the
# same nice file paths that Core uses for private files.  Since Drupal 8 no
# longer allows us to have "menu tails" (i.e., extra/parts/of/the/path after the
# default part of the path), we need to get some router superpowers. Our route
# (in stream_wrapper_example.routing.yml) will "gather up" the path with with a
# regular expression.  But we need to do a little more that that.  We also need
# to convince the routing system to see our weird, extra long route route. We do
# that using a "Path Processor". We register the path_process.sessions service
# with special tags to get it loaded for when the Drupal's routing system
# decides which path should get used.
#
# @see src/StreamWrapper/SessionStreamWrapper.php
# @see src/PathProcessor/PathProcessorSessions.php
# @see stream_wrapper_example.routing.yml
#
services:
  stream_wrapper_example.stream_wrapper:
    class: Drupal\stream_wrapper_example\StreamWrapper\SessionStreamWrapper
    tags:
      - { name: stream_wrapper, scheme: session }
    arguments: ['@stream_wrapper_example.session_helper']

  stream_wrapper_example.session_helper:
    class: Drupal\stream_wrapper_example\SessionHelper
    arguments: ['@request_stack']

  path_processor.sessions:
    class: Drupal\stream_wrapper_example\PathProcessor\PathProcessorSessions
    tags:
      - { name: path_processor_inbound, priority: 200 }