HTTPClient

Facade for HTTP client.

HTTPClient is meant to be use'd in custom modules in order to wrap the functionalities provided by supported HTTP clients.

Usage

For example, to build API clients around HTTPClient:

defmodule GitHub do
  use HTTPClient
  
  @endpoint "https://api.github.com"
    
  def read_repo(url, headers, option) do
    get(@endpoint <> url, headers, option)
  end
end

This way, all requests done through the GitHub module will be done to the GitHub API:

GitHub.read_repo("/repos/ChannexIO/http_client", headers, options)
#=> will issue a GET request at https://api.github.com/repos/ChannexIO/http_client

By default requests done through HTTPoison client, to use Finch, for example, add use options:

use HTTPClient, adapter: :finch

Telemetry

HTTPClient uses Telemetry to provide the following events:

• [:http_client, :request, :start] - Executed before sending a request.

  Measurements:

  • :system_time - The system time

  Metadata:

  • :adapter - The name of adapter impelementation.
  • :args - The arguments passed in the request (url, headers, etc.).
  • :method - The method used in the request.

• [:http_client, :request, :stop] - Executed after a request is finished.

  Measurements:

  • :duration - Duration to make the request.

  Metadata:

  • :adapter - The name of adapter impelementation.
  • :args - The arguments passed in the request (url, headers, etc.).
  • :method - The method used in the request.
  • :status_code - This value is optional. The response status code.
  • :error - This value is optional. It includes any errors that occured while making the request.

See the HTTPClient.Telemetry module for details on specific events.

Installation

Can be installed by adding http_client to your list of dependencies in mix.exs:

def deps do
  [
    {:http_client, github: "ChannexIO/http_client"}
  ]
end