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phoenix
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1.0.6
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0.2.3
0.2.2
0.2.1
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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.
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Files
lib/phoenix/endpoint/render_errors.ex
defmodule Phoenix.Endpoint.RenderErrors do
# This module is used to catch failures and render them using a view.
#
# This module is automatically used in `Phoenix.Endpoint` where it
# overrides `call/2` to provide rendering. Once the error is
# rendered, the error is reraised unless it is a NoRouteError.
#
# ## Options
#
# * `:view` - the name of the view we render templates against
# * `:format` - the format to use when none is available from the request
#
@moduledoc false
@already_sent {:plug_conn, :sent}
import Plug.Conn
import Phoenix.Controller
@doc false
defmacro __using__(opts) do
quote do
@before_compile Phoenix.Endpoint.RenderErrors
@phoenix_handle_errors unquote(opts)
end
end
@doc false
defmacro __before_compile__(_) do
quote location: :keep do
defoverridable [call: 2]
def call(conn, opts) do
try do
super(conn, opts)
catch
kind, reason ->
Phoenix.Endpoint.RenderErrors.__catch__(conn, kind, reason, @phoenix_handle_errors)
end
end
end
end
@doc false
def __catch__(_conn, :error, %Plug.Conn.WrapperError{} = wrapper, opts) do
%{conn: conn, kind: kind, reason: reason, stack: stack} = wrapper
__catch__(conn, kind, reason, stack, opts)
end
def __catch__(conn, kind, reason, opts) do
__catch__(conn, kind, reason, System.stacktrace, opts)
end
defp __catch__(_conn, :error, %Phoenix.Router.NoRouteError{} = reason, stack, opts) do
maybe_render(reason.conn, :error, reason, stack, opts)
end
defp __catch__(conn, kind, reason, stack, opts) do
maybe_render(conn, kind, reason, stack, opts)
:erlang.raise(kind, reason, stack)
end
## Rendering
# Made public with @doc false for testing.
@doc false
def render(conn, kind, reason, stack, opts) do
conn = fetch_query_params(conn)
case fetch_format(conn, opts) do
%{halted: true} = conn ->
conn
conn ->
reason = Exception.normalize(kind, reason, stack)
format = get_format(conn)
status = status(kind, reason)
format = "#{status}.#{format}"
conn
|> put_layout(false)
|> put_view(opts[:view])
|> put_status(status)
|> render(format, %{kind: kind, reason: reason, stack: stack})
end
end
defp maybe_render(conn, kind, reason, stack, opts) do
receive do
@already_sent ->
send self(), @already_sent
%{conn | state: :sent}
after
0 ->
render conn, kind, reason, stack, opts
end
end
defp fetch_format(conn, opts) do
case get_format(conn) do
format when is_binary(format) -> conn
_ -> conn |> fetch_query_params |> accepts(Keyword.fetch!(opts, :accepts))
end
end
defp status(:error, error), do: Plug.Exception.status(error)
defp status(:throw, _throw), do: 500
defp status(:exit, _exit), do: 500
end