honkoma/lib/pleroma/http/http.ex

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# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 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.AdapterHelper
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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__
@type method() :: :get | :post | :put | :delete | :head
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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)
@spec head(Request.url(), Request.headers(), keyword()) :: {:ok, Env.t()} | {:error, any()}
def head(url, headers \\ [], options \\ []), do: request(:head, url, "", headers, options)
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@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, :head
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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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"""
@spec request(method(), Request.url(), String.t(), Request.headers(), keyword()) ::
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{:ok, Env.t()} | {:error, any()}
def request(method, url, body, headers, options) when is_binary(url) do
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uri = URI.parse(url)
adapter_opts = AdapterHelper.options(uri, options[:adapter] || [])
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case AdapterHelper.get_conn(uri, adapter_opts) do
{:ok, adapter_opts} ->
options = put_in(options[:adapter], adapter_opts)
params = options[:params] || []
request = build_request(method, headers, options, url, body, params)
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adapter = Application.get_env(:tesla, :adapter)
client = Tesla.client([Pleroma.HTTP.Middleware.FollowRedirects], adapter)
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maybe_limit(
fn ->
request(client, request)
end,
adapter,
adapter_opts
)
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# Connection release is handled in a custom FollowRedirects middleware
err ->
err
end
end
@spec request(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}
def request(client, request), do: Tesla.request(client, request)
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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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@prefix Pleroma.Gun.ConnectionPool
defp maybe_limit(fun, Tesla.Adapter.Gun, opts) do
ConcurrentLimiter.limit(:"#{@prefix}.#{opts[:pool] || :default}", fun)
end
defp maybe_limit(fun, _, _) do
fun.()
end
end