akkoma/lib/pleroma/http/http.ex

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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.HTTP do
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@moduledoc """
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Wrapper for `Tesla.request/2`.
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"""
alias Pleroma.HTTP.Connection
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alias Pleroma.HTTP.Request
alias Pleroma.HTTP.RequestBuilder, as: Builder
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alias Tesla.Client
alias Tesla.Env
require Logger
@type t :: __MODULE__
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@doc """
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Performs GET request.
See `Pleroma.HTTP.request/5`
"""
@spec get(Request.url() | nil, Request.headers(), keyword()) ::
nil | {:ok, Env.t()} | {:error, any()}
def get(url, headers \\ [], options \\ [])
def get(nil, _, _), do: nil
def get(url, headers, options), do: request(:get, url, "", headers, options)
@doc """
Performs POST request.
See `Pleroma.HTTP.request/5`
"""
@spec post(Request.url(), String.t(), Request.headers(), keyword()) ::
{:ok, Env.t()} | {:error, any()}
def post(url, body, headers \\ [], options \\ []),
do: request(:post, url, body, headers, options)
@doc """
Builds and performs http request.
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# Arguments:
`method` - :get, :post, :put, :delete
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`url` - full url
`body` - request body
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`headers` - a keyworld list of headers, e.g. `[{"content-type", "text/plain"}]`
`options` - custom, per-request middleware or adapter options
# Returns:
`{:ok, %Tesla.Env{}}` or `{:error, error}`
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"""
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@spec request(atom(), Request.url(), String.t(), Request.headers(), keyword()) ::
{:ok, Env.t()} | {:error, any()}
def request(method, url, body, headers, options) when is_binary(url) do
with uri <- URI.parse(url),
received_adapter_opts <- Keyword.get(options, :adapter, []),
adapter_opts <- Connection.options(uri, received_adapter_opts),
options <- put_in(options[:adapter], adapter_opts),
params <- Keyword.get(options, :params, []),
request <- build_request(method, headers, options, url, body, params),
client <- Tesla.client([Tesla.Middleware.FollowRedirects], tesla_adapter()),
pid <- Process.whereis(adapter_opts[:pool]) do
pool_alive? =
if tesla_adapter() == Tesla.Adapter.Gun && pid do
Process.alive?(pid)
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else
false
end
request_opts =
adapter_opts
|> Enum.into(%{})
|> Map.put(:env, Pleroma.Config.get([:env]))
|> Map.put(:pool_alive?, pool_alive?)
response =
request(
client,
request,
request_opts
)
Connection.after_request(adapter_opts)
response
end
end
@spec request(Client.t(), keyword(), map()) :: {:ok, Env.t()} | {:error, any()}
def request(%Client{} = client, request, %{env: :test}), do: request_try(client, request)
def request(%Client{} = client, request, %{body_as: :chunks}) do
request_try(client, request)
end
def request(%Client{} = client, request, %{pool_alive?: false}) do
request_try(client, request)
end
def request(%Client{} = client, request, %{pool: pool, timeout: timeout}) do
try do
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:poolboy.transaction(
pool,
&Pleroma.Pool.Request.execute(&1, client, request, timeout + 500),
timeout + 1_000
)
rescue
e ->
{:error, e}
catch
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:exit, {:timeout, _} ->
Logger.warn("Receive response from pool failed #{request[:url]}")
{:error, :recv_pool_timeout}
:exit, e ->
{:error, e}
end
end
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@spec request_try(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}
def request_try(client, request) do
try do
Tesla.request(client, request)
rescue
e ->
{:error, e}
catch
:exit, e ->
{:error, e}
end
end
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defp build_request(method, headers, options, url, body, params) do
Builder.new()
|> Builder.method(method)
|> Builder.headers(headers)
|> Builder.opts(options)
|> Builder.url(url)
|> Builder.add_param(:body, :body, body)
|> Builder.add_param(:query, :query, params)
|> Builder.convert_to_keyword()
end
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defp tesla_adapter, do: Application.get_env(:tesla, :adapter)
end