Provides a default implementation for HTTPoison functions.

This module is meant to be use‘d in custom modules in order to wrap the functionalities provided by HTTPoison. For example, this is very useful to build API clients around HTTPoison:

defmodule GitHub do
  use HTTPoison.Base

  @endpoint "https://api.github.com"

  defp process_url(url) do
    @endpoint <> url
  end
end

The example above shows how the GitHub module can wrap HTTPoison functionalities to work with the GitHub API in particular; this way, for example, all requests done through the GitHub module will be done to the GitHub API:

GitHub.get("/users/octocat/orgs")
#=> will issue a GET request at https://api.github.com/users/octocat/orgs

Overriding functions

HTTPoison.Base defines the following list of functions, all of which can be overridden (by redefining them). The following list also shows the typespecs for these functions and a short description.

# Called in order to process the url passed to any request method before
# actually issuing the request.
@spec process_url(binary) :: binary
defp process_url(url)

# Called to arbitrarily process the request body before sending it with the
# request.
@spec process_request_body(term) :: binary
defp process_request_body(body)

# Called to arbitrarily process the request headers before sending them
# with the request.
@spec process_request_headers(term) :: [{binary, term}]
defp process_request_headers(headers)

# Called before returning the response body returned by a request to the
# caller.
@spec process_response_body(binary) :: term
defp process_response_body(body)

# Used when an async request is made; it's called on each chunk that gets
# streamed before returning it to the streaming destination.
@spec process_response_chunk(binary) :: term
defp process_response_chunk(chunk)

# Called to process the response headers before returning them to the
# caller.
@spec process_headers([{binary, term}]) :: term
defp process_headers(headers)

# Used to arbitrarily process the status code of a response before
# returning it to the caller.
@spec process_status_code(integer) :: term
defp process_status_code(status_code)