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This makes it a bit more visually distinguished from the paragraph before. I think that's a good thing as it's essentially a completely separate topic.
54 lines
1.7 KiB
Markdown
54 lines
1.7 KiB
Markdown
---
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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
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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 zero or more parameters that can be
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extracted from a request (ie, `impl FromRequest`) and returns a type that can be
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converted into an `HttpResponse` (ie, `impl Responder`):
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{{< include-example example="getting-started" section="setup" >}}
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Next, create an `App` instance and register the request handler with the application's
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`route` on a *path* and with a particular *HTTP method*. After that, the application
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instance can be used with `HttpServer` to listen for incoming connections. The server
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accepts a function that should return an application factory.
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{{< include-example example="getting-started" section="main" >}}
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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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### Auto-reloading
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If you want, you can have an automatically reloading server during development
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that recompiles on demand. This isn't necessary, but it makes rapid prototyping
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more convenient as you can see changes instantly upon saving.
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To see how this can be accomplished, have a look at the [autoreload pattern][autoload].
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[autoload]: ../autoreload/
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