karlosmid’s gists

karlosmid / 431_error.ex

Created August 14, 2021 14:28

HTTP 431 logged by Cowboy HTTP server

Cowboy returned 431 because it was unable to parse the request headers. This may happen because there are no headers, or there are too many headers or the header name or value are too large (such as a large cookie). You can customize those values when configuring your http/https server. The configuration option and default values are shown below: protocol_options: [ max_header_name_length: 64, max_header_value_length: 4096, max_headers: 100 ]

karlosmid / error.ex

Last active August 14, 2021 14:32

Cowboy error for HTTP 431

[error] [early_error_time: -576460745611033000, partial_req: %{headers: %{"accept" => "*/*", "host" => "localhost:5000", "user-agent" => "curl/7.64.1"}, method: "GET", path: "/healthcheck", peer: {{127, 0, 0, 1}, 51940}, qs: "", ref: YourAppName.Endpoint.HTTP, version: :"HTTP/1.1"}, pid: #PID<0.718.0>, reason: {:connection_error, :limit_reached, :"A header value is larger than configuration allows. (RFC7230 3.2.5, RFC6585 5)"}, ref: YourAppName.Endpoint.HTTP, resp_headers: %{"connection" => "close", "content-length" => "0"}, resp_status: 431, streamid: 1]

karlosmid / telemetry.ex

Created August 14, 2021 14:22

Handle the broken HTTP request

	defmodule YourAppName.LogIncompleteRequestHandler do
	require Logger

	def handle_event([:cowboy, :request, :early_error], _response, request, nil) do
	Logger.error(IO.inspect(request))
	end
	end

karlosmid / application.ex

Created August 14, 2021 14:17

how to log broken HTTP request in Phoenix

	:ok = :telemetry.attach(
	"cowboy-request-handler",
	[:cowboy, :request, :early_error],
	&YourAppName.LogIncompleteRequestHandler.handle_event/4,
	nil
	)

karlosmid / function_guards.ex

Created February 23, 2021 20:52

Example of function guards

	defmodule Vat do
	@moduledoc """
	Elixir In Action book example for function overloading
	"""
	def price(%{country: :germany, price: price}), do: calc_total_price(1.19, price)
	def price(%{country: :greece, price: price}), do: calc_total_price(1.24, price)
	def price(%{country: :croatia, price: price}), do: calc_total_price(1.25, price)
	def price(unknown), do: {:unknown_country_data, unknown}

	defp calc_total_price(vat, price) when vat > 1.20, do: "Expensive country: " <> "#{vat * price}"

karlosmid / forbid_add_column.html

Created February 19, 2021 14:21

Forbid adding columns to jExcel

	<html>
	<script src="https://bossanova.uk/jspreadsheet/v3/jexcel.js"></script>
	<link rel="stylesheet" href="https://bossanova.uk/jspreadsheet/v3/jexcel.css" type="text/css" />
	<script src="https://jsuites.net/v3/jsuites.js"></script>
	<link rel="stylesheet" href="https://jsuites.net/v3/jsuites.css" type="text/css" />

	<div id='my-spreadsheet'></div>

	<script>
	data = [

karlosmid / function_overload_no_exception.ex

Created February 12, 2021 16:18

	defmodule Vat do
	@moduledoc """
	Elixir In Action book example for function overloading
	"""
	def price(%{country: :germany, price: price}), do: 1.19 * price
	def price(%{country: :greece, price: price}), do: 1.24 * price
	def price(%{country: :croatia, price: price}), do: 1.25 * price
	def price(unknown), do: {:unknown_country_data, unknown}
	end

karlosmid / function_overload.ex

Created February 12, 2021 13:56

Example for Elixir function overloading

	defmodule Vat do
	@moduledoc """
	Elixir In Action book example for function overloading
	"""
	def price(%{country: :germany, price: price}), do: 1.19 * price
	def price(%{country: :greece, price: price}), do: 1.24 * price
	def price(%{country: :croatia, price: price}), do: 1.25 * price
	end

karlosmid / test_helpers.exs

Created February 7, 2021 16:46

test helpers file for Mox

	Mox.defmock(ExKeyCDN.MockZone, for: ExKeyCDN.ZoneBehaviour)
	Application.put_env(:exkeycdn, :zone, ExKeyCDN.MockZone)

karlosmid / zone_test.exs

Last active February 7, 2021 16:45

ExKeyCDN Zone test using Mox

	defmodule ExKeyCDN.ZoneTest do
	use ExUnit.Case, async: true

	import Mox

	# Make sure mocks are verified when the test exits
	setup :verify_on_exit!

	describe "list/0" do
	test "mock" do

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