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== Cowboy (Erlang) == [[File:Cowboy Logo.png|thumb|right|Cowboy Logo]] '''Cowboy''' is a lightweight, efficient, and flexible HTTP server that supports the Elixir programming language. It is written in Erlang, a language known for its fault-tolerant, highly concurrent, and distributed nature. Cowboy is designed to handle high traffic loads and is widely used in the Elixir and Erlang communities for building scalable and performant web applications. === Features === Cowboy offers a wide range of features that make it a popular choice for developing web applications in Elixir. Some of the key features include: ==== HTTP/1.1 and HTTP/2 support ==== Cowboy supports both the HTTP/1.1 and HTTP/2 protocols, allowing developers to take advantage of the latest web standards and enhancements. ==== Routing ==== Cowboy provides a powerful routing system that allows developers to define URL patterns and map them to specific handlers. This makes it easy to build RESTful APIs and handle different types of HTTP requests. ==== WebSockets ==== Cowboy includes built-in support for WebSockets, enabling real-time communication between a web server and clients. This feature is particularly useful for applications that require bidirectional communication, such as chat applications or collaborative tools. ==== Streaming ==== Cowboy supports streaming responses, allowing developers to send data in chunks as it becomes available, rather than waiting for the entire response to be generated. This can greatly improve the performance and responsiveness of web applications, especially when dealing with large datasets or real-time data. ==== Plug-based Middleware ==== Cowboy integrates seamlessly with Elixir's Plug library, which provides a modular way to compose web application pipelines. Developers can easily add custom middleware to handle tasks such as authentication, request logging, or caching. === Getting Started === To get started with Cowboy, you can install it as a dependency in your Elixir project by adding it to your `mix.exs` file: ```elixir defp deps do [ {:cowboy, "~> 2.9"} ] end ``` Once you have added Cowboy as a dependency, you can start using it in your application by defining routes and handlers. Here's a simple example: ```elixir defmodule MyRouter do use Cowboy.Router get "/", handler: MyHandler, action: :index defmodule MyHandler do use Cowboy.Handler def index(conn, _opts) do conn |> send_resp(200, "Hello, Cowboy!") |> Cowboy.Handler.reply(:ok, conn) end end end defmodule MyApp do use Application def start(_type, _args) do children = [ MyRouter ] opts = [port: 4000] Supervisor.start_link(children, opts) end end ``` === Conclusion === Cowboy is a powerful and feature-rich HTTP server for the Elixir programming language. Its lightweight and efficient design, combined with its support for modern web protocols and features, makes it a popular choice for building scalable and high-performance web applications. By leveraging Cowboy's routing, WebSocket support, and other features, Elixir developers can create robust and efficient web applications that meet the demands of today's internet-driven world. == References == {{reflist}} [[Category:Programming languages]] [[Category:Web frameworks]] [[Category:Elixir (programming language)]] [[Category:Erlang (programming language)]]
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