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New Relic's Open-Source Elixir Agent
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lib/new_relic/util/http.ex
defmodule NewRelic.Util.HTTP do
@moduledoc false
@gzip {~c"content-encoding", ~c"gzip"}
def post(url, body, headers) when is_binary(body) do
headers = [@gzip | Enum.map(headers, fn {k, v} -> {~c"#{k}", ~c"#{v}"} end)]
request = {~c"#{url}", headers, ~c"application/json", :zlib.gzip(body)}
with {:ok, {{_, status_code, _}, _headers, body}} <-
:httpc.request(:post, request, http_options(), []) do
{:ok, %{status_code: status_code, body: to_string(body)}}
end
end
def post(url, body, headers) do
body = NewRelic.JSON.encode!(body)
post(url, body, headers)
rescue
error ->
NewRelic.log(:debug, "Unable to JSON encode: #{inspect(body)}")
{:error, Exception.message(error)}
end
def get(url, headers \\ [], opts \\ []) do
headers = Enum.map(headers, fn {k, v} -> {~c"#{k}", ~c"#{v}"} end)
request = {~c"#{url}", headers}
with {:ok, {{_, status_code, _}, _, body}} <-
:httpc.request(:get, request, http_options(opts), []) do
{:ok, %{status_code: status_code, body: to_string(body)}}
end
end
# Certs are from `CAStore`.
# https://github.com/elixir-mint/castore
# SSL configured according to EEF Security guide:
# https://erlef.github.io/security-wg/secure_coding_and_deployment_hardening/ssl
defp http_options(opts \\ []) do
env_opts = Application.get_env(:new_relic_agent, :httpc_request_options, [])
[
connect_timeout: 1000,
ssl: [
verify: :verify_peer,
cacertfile: CAStore.file_path(),
customize_hostname_check: [
match_fun: :public_key.pkix_verify_hostname_match_fun(:https)
]
]
]
|> Keyword.merge(opts)
|> Keyword.merge(env_opts)
end
end