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phoenix
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0.1.0
Productive. Reliable. Fast. A productive web framework that does not compromise speed or maintainability.
Security advisory:
This version has known vulnerabilities.
View advisories
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Files
lib/phoenix.ex
defmodule Phoenix do
@moduledoc """
This is the documentation for the Phoenix project.
By default, Phoenix applications depend on the following packages
across these categories.
## General
* [Ecto](https://hexdocs.pm/ecto) - a language integrated query and
database wrapper
* [ExUnit](https://hexdocs.pm/ex_unit) - Elixir's built-in test framework
* [Gettext](https://hexdocs.pm/gettext) - Internationalization and
localization through [`gettext`](https://www.gnu.org/software/gettext/)
* [Phoenix](https://hexdocs.pm/phoenix) - the Phoenix web framework
(these docs)
* [Phoenix PubSub](https://hexdocs.pm/phoenix_pubsub) - a distributed
pub/sub system with presence support
* [Phoenix HTML](https://hexdocs.pm/phoenix_html) - conveniences for
working with HTML in Phoenix
* [Phoenix View](https://hexdocs.pm/phoenix_view) - a set of functions
for building `Phoenix.View` and working with template languages such
as Elixir's own `EEx`
* [Phoenix LiveView](https://hexdocs.pm/phoenix_live_view) - rich,
real-time user experiences with server-rendered HTML
* [Phoenix LiveDashboard](https://hexdocs.pm/phoenix_live_dashboard) -
real-time performance monitoring and debugging tools for Phoenix
developers
* [Plug](https://hexdocs.pm/plug) - a specification and conveniences
for composable modules in between web applications
* [Swoosh](https://hexdocs.pm/swoosh) - a library for composing,
delivering and testing emails, also used by `mix phx.gen.auth`
* [Telemetry Metrics](https://hexdocs.pm/telemetry_metrics) - common
interface for defining metrics based on Telemetry events
To get started, see our [overview guides](overview.html).
"""
use Application
@doc false
def start(_type, _args) do
# Warm up caches
_ = Phoenix.Template.engines()
_ = Phoenix.Template.format_encoder("index.html")
warn_on_missing_json_library()
# Configure proper system flags from Phoenix only
if stacktrace_depth = Application.get_env(:phoenix, :stacktrace_depth) do
:erlang.system_flag(:backtrace_depth, stacktrace_depth)
end
if Application.fetch_env!(:phoenix, :logger) do
Phoenix.Logger.install()
end
children = [
# Code reloading must be serial across all Phoenix apps
Phoenix.CodeReloader.Server,
{DynamicSupervisor, name: Phoenix.Transports.LongPoll.Supervisor, strategy: :one_for_one}
]
Supervisor.start_link(children, strategy: :one_for_one, name: Phoenix.Supervisor)
end
# TODO v2: swap Poison default with Jason
# From there we can ditch explicit config for new projects
@doc """
Returns the configured JSON encoding library for Phoenix.
To customize the JSON library, including the following
in your `config/config.exs`:
config :phoenix, :json_library, Jason
"""
def json_library do
Application.get_env(:phoenix, :json_library, Poison)
end
@doc """
Returns the `:plug_init_mode` that controls when plugs are
initialized.
We recommend to set it to `:runtime` in development for
compilation time improvements. It must be `:compile` in
production (the default).
This option is passed as the `:init_mode` to `Plug.Builder.compile/3`.
"""
def plug_init_mode do
Application.get_env(:phoenix, :plug_init_mode, :compile)
end
defp warn_on_missing_json_library do
configured_lib = Application.get_env(:phoenix, :json_library)
cond do
configured_lib && Code.ensure_loaded?(configured_lib) ->
true
configured_lib && not Code.ensure_loaded?(configured_lib) ->
IO.warn """
found #{inspect(configured_lib)} in your application configuration
for Phoenix JSON encoding, but module #{inspect(configured_lib)} is not available.
Ensure #{inspect(configured_lib)} is listed as a dependency in mix.exs.
"""
true ->
IO.warn """
Phoenix now requires you to explicitly list which engine to use
for Phoenix JSON encoding. We recommend everyone to upgrade to
Jason by setting in your config/config.exs:
config :phoenix, :json_library, Jason
And then adding {:jason, "~> 1.0"} as a dependency.
If instead you would rather continue using Poison, then add to
your config/config.exs:
config :phoenix, :json_library, Poison
"""
end
end
end