Monthly Downloads: 1,252,422
Programming language: Elixir
License: MIT License
Tags: HTTP    
Latest version: v0.5.2

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An HTTP client with a focus on performance, built on top of Mint and NimblePool.


In order to use Finch, you must start it and provide a :name. Often in your supervision tree:

children = [
  {Finch, name: MyFinch}

Or, in rare cases, dynamically:

Finch.start_link(name: MyFinch)

Once you have started your instance of Finch, you are ready to start making requests:

Finch.build(:get, "https://hex.pm") |> Finch.request(MyFinch)

When using HTTP/1, Finch will parse the passed in URL into a {scheme, host, port} tuple, and maintain one or more connection pools for each {scheme, host, port} you interact with.

You can also configure a pool size and count to be used for specific URLs that are known before starting Finch. The passed URLs will be parsed into {scheme, host, port}, and the corresponding pools will be started. See Finch.start_link/1 for configuration options.

children = [
   name: MyConfiguredFinch,
   pools: %{
     :default => [size: 10],
     "https://hex.pm" => [size: 32, count: 8]

Pools will be started for each configured {scheme, host, port} when Finch is started. For any unconfigured {scheme, host, port}, the pool will be started the first time it is requested. Note pools are not automatically terminated if they are unused, so Finch is best suited when you are requesting a known list of static hosts.


Finch uses Telemetry to provide instrumentation. See the Finch.Telemetry module for details on specific events.

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The package can be installed by adding finch to your list of dependencies in mix.exs:

def deps do
    {:finch, "~> 0.5"}

The docs can be found at https://hexdocs.pm/finch.