Grape API HTTP request error with "error: http request"

[alilland]

Fiddling with Falcon for the first time with a clean Grape API, which is a RACK based API framework

looking at the sinatra example here https://github.com/socketry/falcon/tree/master/examples/sinatra

I figured it might be plug and play to get falcon working, it doesnt appear to be so. Below is my sample code. I've been using Grape for a very long time but im not sure where to start troubleshooting on this one 😕

Im getting the following error when calling http://localhost:3000

  $ falcon serve --port 3000
  0.0s     info: Falcon::Command::Serve [oid=0x938] [ec=0x94c] [pid=6429] [2021-07-24 18:07:27 -0700]
               | Falcon v0.39.2 taking flight! Using Async::Container::Forked {:count=>8}.
               | - Binding to: #<Falcon::Endpoint https://localhost:3000/ {:port=>3000}>
               | - To terminate: Ctrl-C or kill 6429
               | - To reload configuration: kill -HUP 6429
 0.04s     info: Falcon::Controller::Serve [oid=0x960] [ec=0x94c] [pid=6429] [2021-07-24 18:07:27 -0700]
               | Starting Falcon Server on https://localhost:3000/
 0.47s     info: Async::Container::Process::Instance [oid=0xe4c] [ec=0xe60] [pid=6433] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6433
 0.47s     info: Async::Container::Process::Instance [oid=0xe9c] [ec=0xeb0] [pid=6435] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6435
 0.47s     info: Async::Container::Process::Instance [oid=0xe74] [ec=0xe88] [pid=6434] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6434
 0.47s     info: Async::Container::Process::Instance [oid=0xeec] [ec=0xf00] [pid=6437] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6437
 0.47s     info: Async::Container::Process::Instance [oid=0xdfc] [ec=0xe10] [pid=6431] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6431
 0.47s     info: Async::Container::Process::Instance [oid=0xe24] [ec=0xe38] [pid=6432] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6432
 0.47s     info: Async::Container::Process::Instance [oid=0xdd4] [ec=0xde8] [pid=6430] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6430
 0.47s     info: Async::Container::Process::Instance [oid=0xec4] [ec=0xed8] [pid=6436] [2021-07-24 18:07:27 -0700]
               | - Per-process status: kill -USR1 6436
33.39s    error: Async::Task [oid=0xe60] [ec=0xe74] [pid=6431] [2021-07-24 18:08:00 -0700]
               |   OpenSSL::SSL::SSLError: SSL_accept returned=1 errno=0 state=error: http request
               |   → /Users/aronlilland/.rvm/gems/ruby-3.0.0/gems/async-io-1.32.2/lib/async/io/generic.rb:216 in `accept_nonblock'
               |     /Users/aronlilland/.rvm/gems/ruby-3.0.0/gems/async-io-1.32.2/lib/async/io/generic.rb:216 in `async_send'
               |     /Users/aronlilland/.rvm/gems/ruby-3.0.0/gems/async-io-1.32.2/lib/async/io/generic.rb:62 in `block in wrap_blocking_method'
               |     /Users/aronlilland/.rvm/gems/ruby-3.0.0/gems/async-io-1.32.2/lib/async/io/ssl_socket.rb:143 in `block in accept'
               |     /Users/aronlilland/.rvm/gems/ruby-3.0.0/gems/async-1.30.0/lib/async/task.rb:260 in `block in make_fiber'

Gemfile

# frozen_string_literal: true

source 'http://rubygems.org'

ruby '3.0.0'

gem 'falcon'
gem 'grape'
gem 'grape-entity'
gem 'rack'
gem 'rack-contrib'
gem 'rack-cors'

config.ru

# frozen_string_literal: true

require 'rack/cors'
require 'grape'

Bundler.require :default

use Rack::Cors do
  allow do
    origins '*'
    resource '*', headers: :any, methods: %i[get post options put delete patch]
  end
end

require_relative './init'

run Rack::Cascade.new [SAMPLE::API]

init.rb

# frozen_string_literal: true

##
module SAMPLE
  require_relative './settings'

  class API < ::Grape::API
    use Rack::JSONP
    content_type :json, 'application/json'
    default_format :json

    get '/' do
      present :root, { api_name: 'sample', version: '0.0.1' }, with: Grape::Presenters::Presenter
    end
  end
end

settings.rb

# frozen_string_literal: true

API_ROOT = File.dirname(__FILE__)

[ioquatix]

Are you trying to access an https server using http?

Im getting the following error when calling http://localhost:3000

Binding to: #<Falcon::Endpoint https://localhost:3000/ {:port=>3000}>

error: http request

[alilland]

not intentionally, i just ran falcon serve, which seems to output that https verbage

since i dont have any certificates installed it throws an error if I try to curl https... which wouldnt make sense anyway on localhost...

[ioquatix]

Falcon supports HTTP/2 out of the box. HTTP/2 requires TLS. This is also necessary for ALPN. Falcon uses the localhost gem which automatically generates self-signed certificates for localhost. The documentation explains how to use it: https://github.com/socketry/localhost

For curl, you need to specify --insecure although I wish more tools would accept self-signed localhost by default (since there is no option to get a "valid" certificate for localhost).