The HTTP spec details a way to use HTTP/1.1 as a platform for transitioning to newer protocols by starting the conversation with HTTP/1.1. There are no restrictions on what that protocol can be.

Ruby FFI bindings to the http-parser library.

This gem allows you to check the Content-Type of any HTTP-accessible asset.

gem to make http and https request

This tunnels HTTPS to HTTP and configures itself using Pow's config.

Provides with the ability to validate url (Rails 4). Allow using http, https and schema-less urls, checks domain zones, IP-based hostnames, name space specifications and hostname characters.

A HTTP client and server library.

NetHttp2 is an HTTP2 client for Ruby.

APISmith provides tools to make working with structured HTTP-based apis even easier.

LHS ia a Rails-Gem, providing an ActiveRecord like interface to access HTTP-JSON-Services from Rails Applications. Special features provided by this gem are: Multiple endpoint configuration per resource, active-record-like query-chains, scopes, error handling, relations, request cycle cache, batc...

Kiev is a logging tool aimed at distributed environments. It logs to JSON, while providing human-readable output in development mode. It integrates nicely with Rails, Sinatra and other Rack-based frameworks, Sidekiq, Que, HTTParty, Her and other Faraday-based HTTP clients.

Faraday Adapter for HTTP.rb

htty is a console application for interacting with web servers. It's a fun way to explore web APIs and to learn the ins and outs of HTTP.

Simple interface for calling httperf via ruby.

fetcher - Fetch Text Documents or Binary Blobs via HTTP, HTTPS

It uses OpenSSL `s_client` command to securely connect with server that requires usage of GOST algorithms and client certificates.

An HTTP client designed for use with JRuby in a threaded environment

Interact with Saferpay's HTTPS Interface with an object-oriented API wrapper built with HTTParty.

a pure ruby http/2 client & server based on http-2

A Rack middleware IP filter that uses Http:BL to exclude suspicious robots.