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# Vapor Documentation

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template:
url: https://github.com/CouscousPHP/Template-Dark
title: Vapor Documentation
subTitle: A web framework and server for Swift that works on macOS and Ubuntu.
menu:
sections:
links:
name: Links
items:
website:
text: Qutheory.io
absoluteUrl: http://qutheory.io
example:
text: Example
absoluteUrl: http://example.qutheory.io
github:
text: GitHub
absoluteUrl: https://github.com/qutheory/vapor
twitter:
text: Twitter
absoluteUrl: https://twitter.com/@qutheory
slack:
text: Slack
absoluteUrl: http://slack.qutheory.io
getting-started:
name: Getting Started
items:
getting-started-install-swift-3-macos:
text: Install Swift 3: macOS
relativeUrl: getting-started/install-swift-3-macos.html
getting-started-install-swift-3-ubuntu:
text: Install Swift 3: Ubuntu
relativeUrl: getting-started/install-swift-3-ubuntu.html
getting-started-install-swift-3:
text: Install Swift 3
relativeUrl: getting-started/install-swift-3.html
getting-started-install-toolbox:
text: Install Toolbox
relativeUrl: getting-started/install-toolbox.html
getting-started-hello-world:
text: Hello, World
relativeUrl: getting-started/hello-world.html
guide:
name: Guide
items:
guide-routing:
text: Routing
relativeUrl: guide/routing.html

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---
currentMenu: getting-started-hello-world
---
# Hello, World
This section assumes you have installed Swift 3 and the Vapor Toolbox and have verified they are working.
## New Project
Let's start by creating a new project called Hello, World
```sh
vapor new Hello
```
Vapor's folder structure will probably look familiar to you if you have worked with other web frameworks.
```
.
├── App
│ └── Controllers
│ └── Middleware
│ └── Models
│ └── main.swift
├── Public
├── Resources
│ └── Views
└── Package.swift
```
For our Hello, World project, we will be focusing on the `main.swift` file.
```
.
└── App
└── main.swift
```
Note: The `vapor new` command creates a new project with examples and comments about how to use the framework. You can delete these if you want.
## Droplet
Look for the following line in the `main.swift` file.
```swift
let drop = Droplet()
```
This is where the one and only `Droplet `for this example will be created. The `Droplet` class has a plethora of useful functions on it, and is used extensively.
## Routing
Right after the creation of `drop`, add the following code snippet.
```swift
drop.get("hello") { request in
return "Hello, world!"
}
```
This creates a new route on the `Droplet` that will match all `GET` requests to `/hello`.
All route closures are passed an instance of [Request](/guide/request.html) that contains information such as the URI requested and data sent.
This route simply returns a string, but anything that is [ResponseRepresentable](/guide/routing.html) can be returned. Learn more in the [Routing](/guide/routing.html) section of the guide.
## Serving
At the bottom of the main file, make sure to serve your `Droplet`.
```swift
drop.serve()
```
Save the file, and switch back to the terminal.
## Compiling
A big part of what makes Vapor so great is Swift's state of the art compiler. Let's fire it up. Make sure you are in the root directory of the project and run the following command.
```swift
vapor build
```
Note: `vapor build` runs `swift build` in the background.
The Swift Package Manager will first start by downloading the appropriate dependencies from git. It will then compile and link these dependencies together.
When the process has completed, you will see `Building Project [Done]`
Note: If you see a message like `unable to execute command: Killed`, you need to increase your swap space. This can happen if you are running on a machine with limited memory.
## Run
Boot up the server by running the following command.
```swift
vapor run serve
```
You should see a message `Server starting...`. You can now visit `http://localhost:8080/hello` in your browser.
Note: Certain port numbers require super user access to bind. Simply run `sudo vapor run` to allow access. If you decide to run on a port besides `80`, make sure to direct your browser accordingly.
## Hello, World
You should see the following output in your browser window.
```
Hello, world!
```

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---
currentMenu: getting-started-install-swift-3-macos
---
# Install Swift 3: macOS
To use Vapor on macOS, you need to have Xcode 8 installed and selected.
## Download
To download Xcode 8, visit [Apple Developer Downloads](https://developer.apple.com/download/) or [Swift.org Downloads](https://swift.org/download/#using-downloads)
## Install
After Xcode 8 has downloaded, drag it into your Applications folder and open it. It may take a while to verify the download.
## Select
Select Xcode 8 for your Command Line Tools.
- Open Xcode 8 and go to Preferences (`cmd`+`,`)
- Select the Locations tab
- Under Command Line Tools choose `Xcode 8.0 (xxxxx)`
## Swift
You can now move on to [Install Swift 3](/getting-started/install-swift-3.html)

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currentMenu: getting-started-install-swift-3-ubuntu
---
# Install Swift 3: Ubuntu
To use Swift 3 on Ubuntu, you need to have its dependencies installed.
## Install
Depending on your flavor of Ubuntu, you may need some additional tools for the compiler. We'll err on the safe side and install everything you should need
```sh
sudo apt-get update
sudo apt-get install clang libicu-dev binutils git
```
## Swift
You can now move on to [Install Swift 3](/getting-started/install-swift-3.html)

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currentMenu: getting-started-install-swift-3
---
# Install Swift 3
This section assumes you have followed the operating system specific instructions for either macOS or Ubuntu.
To use Vapor, you must have Swift 3 installed. Each version of Vapor relies on a single Development Snapshot of Swift 3. Vapor 0.15 relies on `DEVELOPMENT-SNAPSHOT-2016-07-25-a`.
## Swiftenv
[Swiftenv](https://github.com/kylef/swiftenv) allows you to easily install, and switch between multiple versions of Swift.
### Install
Clone the program to your home directory.
```sh
git clone https://github.com/kylef/swiftenv.git ~/.swiftenv
```
Initialize Swiftenv in your Bash profile.
```sh
export SWIFTENV_ROOT="$HOME/.swiftenv"
export PATH="$SWIFTENV_ROOT/bin:$PATH"
eval "$(swiftenv init -)"
```
Note: macOS uses `~/.bash_profile` and Ubuntu uses `~/.bashrc`
### Verify
Open a new terminal window and run `swiftenv --version`. You should see something like the following.
```sh
$ swiftenv --version
swiftenv 1.1.0
```
## Download Snapshot
Now that Swiftenv has been installed, the development snapshot of Swift 3 can be downloaded.
```sh
swiftenv install DEVELOPMENT-SNAPSHOT-2016-07-25-a
```
This will download and install the snapshot. You can then make that snapshot globally available as `swift`.
```sh
swiftenv global DEVELOPMENT-SNAPSHOT-2016-07-25-a
```
### Verify
Run `swiftenv versions` to list the versions of Swift 3 installed.
```sh
$ swiftenv versions
* DEVELOPMENT-SNAPSHOT-2016-07-25-a (set by /Users/vapor/.swiftenv/version)
```
## Check
To ensure that your environment has been correctly configured, run the check script.
```sh
curl -sL check.qutheory.io | bash
```

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---
currentMenu: getting-started-install-toolbox
---
# Install Toolbox
Vapor's command line interface provides shortcuts and assistance for commons tasks.
## Install
Run the following script to install the [Toolbox](https://github.com/qutheory/toolbox).
```sh
curl -sL toolbox.qutheory.io | bash
```
Note: You must have the correct version of Swift 3 installed.
## Verify
Make sure the Toolbox installed successfully by running the help query. You should see a print out of the available commands. You can run the `--help` option on any Toolbox command.
```sh
vapor --help
```
## Updating
The toolbox can update itself. This may be useful if you experience any issues in the future.
```sh
vapor self update
```

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currentMenu: guide-routing
---
# Routing
This is how routing works.
```swift
let drop = Droplet()
```