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68 lines
1.8 KiB
Markdown
68 lines
1.8 KiB
Markdown
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---
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title: Getting Started
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menu: docs_basics
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weight: 130
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---
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# Getting Started
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Let’s write our first actix web application!
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## Hello, world!
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Start by creating a new binary-based Cargo project and changing into the new directory:
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```bash
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cargo new hello-world --bin
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cd hello-world
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```
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Now, add `actix-web` as dependencies of your project by ensuring your `Cargo.toml`
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contains the following:
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```ini
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[dependencies]
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actix-web = "{{< actix-version "actix-web" >}}"
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```
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In order to implement a web server, we first need to create a request handler.
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A request handler is a function that accepts an `HttpRequest` instance as its only parameter
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and returns a type that can be converted into `HttpResponse`:
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Filename: `src/main.rs`
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```rust
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extern crate actix_web;
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use actix_web::{HttpRequest, Responder, App, server};
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fn index(req: _HttpRequest) -> Responder {
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"Hello world!"
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}
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```
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Next, create an `Application` instance and register the request handler with
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the application's `resource` on a particular *HTTP method* and *path* and
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after that, the application instance can be used with `HttpServer` to listen
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for incoming connections. The server accepts a function that should return an
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`HttpHandler` instance. For simplicity `server::new` could be used, this
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function is shortcut for `HttpServer::new`:
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```rust
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fn main() {
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server::new(|| {
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App::new()
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.resource("/", |r| r.f(index))
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})
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.bind("127.0.0.1:8088").unwrap()
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.run();
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}
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```
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That's it! Now, compile and run the program with `cargo run`.
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Head over to ``http://localhost:8088/`` to see the results.
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If you want you can have an automatic reloading server during development
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that recompiles on demand. To see how this can be accomplished have a look
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at the [autoreload pattern](../autoreload/).
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