actix-website/docs/conn_lifecycle.md

---
title: Connection Lifecycle
---

import MermaidDiagram from "@site/src/components/mermaid_diagram";
import connection_overview from '!!raw-loader!@site/static/img/diagrams/connection_overview.mmd';
import connection_accept from '!!raw-loader!@site/static/img/diagrams/connection_accept.mmd';
import connection_worker from '!!raw-loader!@site/static/img/diagrams/connection_worker.mmd';
import connection_request from '!!raw-loader!@site/static/img/diagrams/connection_request.mmd';

# Architecture overview

After Server has started listening to all sockets, [`Accept`][accept] and [`Worker`][worker] are two main loops responsible for processing incoming client connections.

Once connection accepted Application level protocol processing happens in a protocol specific [`Dispatcher`][dispatcher] loop spawned from [`Worker`][worker].

    Please note, below diagrams are outlining happy-path scenarios only.

<MermaidDiagram value={connection_overview}  />

## Accept loop in more detail

<MermaidDiagram value={connection_accept}  />

Most of code implementation resides in [`actix-server`][server] crate for struct [`Accept`][accept].

## Worker loop in more detail

<MermaidDiagram value={connection_worker}  />

Most of code implementation resides in [`actix-server`][server] crate for struct [`Worker`][worker].

## Request loop roughly

<MermaidDiagram value={connection_request}  />

Most of code implementation for request loop resides in [`actix-web`][web] and [`actix-http`][http] crates.

[server]: https://crates.io/crates/actix-server
[web]: https://crates.io/crates/actix-web
[http]: https://crates.io/crates/actix-http
[accept]: https://github.com/actix/actix-net/blob/master/actix-server/src/accept.rs
[worker]: https://github.com/actix/actix-net/blob/master/actix-server/src/worker.rs
[dispatcher]: https://github.com/actix/actix-web/blob/master/actix-http/src/h1/dispatcher.rs