nginxに全文検索エンジンGroongaを組み込んでnginxを全文検索サーバーにするngx_http_groongaを紹介します。

Rack middleware to reject crappy http accept headers, Returns '406 Not Acceptable' status when unsupported type is requested.

rack-bert-rpc is rack middleware that provides a BERT-RPC server implemenation for using BERT-RPC over HTTP

Removes specified cookies from HTTP request and / or response on user defined pages.

Computes the final length of a Rack response body and adds an HTTP header with the value.

Rack middleware for declaratively setting the HTTP ContentSecurityPolicy (W3C CSP Level 2/3) security header to help prevent against XSS and other browser based attacks.

Rackish authentication for Rack apps. Provides access to the `Authorization` HTTP header.

Rack middleware implementing an IP whitelist of HTTP verbs.

Rack middleware for creating faking responses for HTTP web services that an application under test communicates with

Reject HTTP TRACE requests via middleware.

Rack middleware to check HTTP request methods and reject ones you don't want

Simple Rack middleware for setting the locale.country via GeoIP using the MaxMind GeoIP database, and setting the locale.languages based on the HTTP_ACCEPT_LANGUAGE header.

Rack::HttpEnforcer is a simple Rack middleware to enforce http connections

Just use Rack::HTTPCat in your application for all requests to have a link to the https://http.cat for their status under the HTTP-Cat header.

Provides Rails helper methods wrapping the HTTP headers set by Rack::Html5.

any request in the rack layer, returns any json response(Content-Type: application/json) and http status.

Rackful provides a minimal interface for developing ReSTful web services with Rack and Ruby. Instead of writing HTTP method handlers, you’ll implement resource objects, which expose their state at URLs. This version is not backward compatible with v0.1.x.

an easy way to deal with simple http request

A fast and functional (API and paradigm) HTTP client, using only Ruby's standard library as dependency. e.g: Net::HTTP and URI.

Antbird is a yet another low level API client for the Elasticsearch HTTP interface.