akkoma/lib/pleroma/http/adapter_helper.ex

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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.HTTP.AdapterHelper do
@moduledoc """
Configure Tesla.Client with default and customized adapter options.
"""
@defaults [name: MyFinch, pool_timeout: 5_000, receive_timeout: 5_000]
@type proxy_type() :: :socks4 | :socks5
@type host() :: charlist() | :inet.ip_address()
alias Pleroma.HTTP.AdapterHelper
require Logger
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@type proxy :: {Connection.proxy_type(), Connection.host(), pos_integer(), list()}
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@callback options(keyword(), URI.t()) :: keyword()
@spec format_proxy(String.t() | tuple() | nil) :: proxy() | nil
def format_proxy(nil), do: nil
def format_proxy(proxy_url) do
case parse_proxy(proxy_url) do
{:ok, type, host, port} -> {type, host, port, []}
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_ -> nil
end
end
@spec maybe_add_proxy(keyword(), proxy() | nil) :: keyword()
def maybe_add_proxy(opts, nil), do: opts
def maybe_add_proxy(opts, proxy) do
Keyword.put(opts, :proxy, proxy)
end
def maybe_add_proxy_pool(opts, nil), do: opts
def maybe_add_proxy_pool(opts, proxy) do
Logger.info("Using HTTP Proxy: #{inspect(proxy)}")
opts
|> maybe_add_pools()
|> maybe_add_default_pool()
|> maybe_add_conn_opts()
|> put_in([:pools, :default, :conn_opts, :proxy], proxy)
end
defp maybe_add_pools(opts) do
if Keyword.has_key?(opts, :pools) do
opts
else
Keyword.put(opts, :pools, %{})
end
end
defp maybe_add_default_pool(opts) do
pools = Keyword.get(opts, :pools)
if Map.has_key?(pools, :default) do
opts
else
put_in(opts, [:pools, :default], [])
end
end
defp maybe_add_conn_opts(opts) do
conn_opts = get_in(opts, [:pools, :default, :conn_opts])
unless is_nil(conn_opts) do
opts
else
put_in(opts, [:pools, :default, :conn_opts], [])
end
end
@doc """
Merge default connection & adapter options with received ones.
"""
@spec options(URI.t(), keyword()) :: keyword()
def options(%URI{} = uri, opts \\ []) do
@defaults
|> Keyword.merge(opts)
|> AdapterHelper.Default.options(uri)
end
defp proxy_type("http"), do: {:ok, :http}
defp proxy_type("https"), do: {:ok, :https}
defp proxy_type(_), do: {:error, :unknown}
@spec parse_proxy(String.t() | tuple() | nil) ::
{:ok, proxy_type(), host(), pos_integer()}
| {:error, atom()}
| nil
def parse_proxy(nil), do: nil
def parse_proxy(""), do: nil
def parse_proxy(proxy) when is_binary(proxy) do
with %URI{} = uri <- URI.parse(proxy),
{:ok, type} <- proxy_type(uri.scheme) do
{:ok, type, uri.host, uri.port}
else
e ->
Logger.warn("Parsing proxy failed #{inspect(proxy)}, #{inspect(e)}")
{:error, :invalid_proxy}
end
end
def parse_proxy(proxy) when is_tuple(proxy) do
with {type, host, port} <- proxy do
{:ok, type, host, port}
else
_ ->
Logger.warn("Parsing proxy failed #{inspect(proxy)}")
{:error, :invalid_proxy}
end
end
@spec parse_host(String.t() | atom() | charlist()) :: charlist() | :inet.ip_address()
def parse_host(host) when is_list(host), do: host
def parse_host(host) when is_atom(host), do: to_charlist(host)
def parse_host(host) when is_binary(host) do
host = to_charlist(host)
case :inet.parse_address(host) do
{:error, :einval} -> host
{:ok, ip} -> ip
end
end
@spec format_host(String.t()) :: charlist()
def format_host(host) do
host_charlist = to_charlist(host)
case :inet.parse_address(host_charlist) do
{:error, :einval} ->
:idna.encode(host_charlist)
{:ok, _ip} ->
host_charlist
end
end
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end