vapor-docs/build/1.5/guide/provider.html

563 lines
23 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Vapor Documentation</title>
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Source+Code+Pro">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Quicksand:400,700,300">
<link rel="stylesheet" href="/1.5/styles/vapor-code.css">
<link rel="stylesheet" href="/1.5/styles/main.css">
</head>
<body>
<header>
<a class="logo" href="/1.5/">
<img src="/1.5/images/droplet.svg" alt="Vapor">
<h1>Vapor <em>Docs</em></h1>
</a>
<ul>
<li>
<a href="http://vapor.codes">Home</a>
</li>
<li>
<a href="http://example.vapor.codes">Example</a>
</li>
<li>
<a href="https://github.com/vapor/vapor">GitHub</a>
</li>
<li>
<a href="https://twitter.com/@codevapor">Twitter</a>
</li>
<li>
<a href="http://vapor.team">Slack</a>
</li>
</ul>
</header>
<nav>
<a href="#" class="toggle show"></a>
<a href="#" class="toggle close">&times;</a>
<div class="scroll">
<section>
<h3>Getting Started</h3>
<ul>
<li class="">
<a href="/1.5/getting-started/install-swift-3-macos.html">
Install Swift 3: macOS
</a>
</li>
<li class="">
<a href="/1.5/getting-started/install-swift-3-ubuntu.html">
Install Swift 3: Ubuntu
</a>
</li>
<li class="">
<a href="/1.5/getting-started/install-toolbox.html">
Install Toolbox
</a>
</li>
<li class="">
<a href="/1.5/getting-started/hello-world.html">
Hello, World
</a>
</li>
<li class="">
<a href="/1.5/getting-started/manual.html">
Manual
</a>
</li>
<li class="">
<a href="/1.5/getting-started/xcode.html">
Xcode
</a>
</li>
</ul>
</section>
<section>
<h3>Guide</h3>
<ul>
<li class="">
<a href="/1.5/guide/droplet.html">
Droplet
</a>
</li>
<li class="">
<a href="/1.5/guide/folder-structure.html">
Folder Structure
</a>
</li>
<li class="">
<a href="/1.5/guide/json.html">
JSON
</a>
</li>
<li class="">
<a href="/1.5/guide/config.html">
Config
</a>
</li>
<li class="">
<a href="/1.5/guide/views.html">
Views
</a>
</li>
<li class="">
<a href="/1.5/guide/leaf.html">
Leaf
</a>
</li>
<li class="">
<a href="/1.5/guide/controllers.html">
Controllers
</a>
</li>
<li class="">
<a href="/1.5/guide/middleware.html">
Middleware
</a>
</li>
<li class="">
<a href="/1.5/guide/validation.html">
Validation
</a>
</li>
<li class="active">
<a href="/1.5/guide/provider.html">
Provider
</a>
</li>
<li class="">
<a href="/1.5/guide/sessions.html">
Sessions
</a>
</li>
<li class="">
<a href="/1.5/guide/hash.html">
Hash
</a>
</li>
<li class="">
<a href="/1.5/guide/commands.html">
Commands
</a>
</li>
</ul>
</section>
<section>
<h3>Routing</h3>
<ul>
<li class="">
<a href="/1.5/routing/basic.html">
Basic
</a>
</li>
<li class="">
<a href="/1.5/routing/parameters.html">
Route Parameters
</a>
</li>
<li class="">
<a href="/1.5/routing/query-parameters.html">
Query Parameters
</a>
</li>
<li class="">
<a href="/1.5/routing/group.html">
Group
</a>
</li>
<li class="">
<a href="/1.5/routing/collection.html">
Collection
</a>
</li>
</ul>
</section>
<section>
<h3>Fluent</h3>
<ul>
<li class="">
<a href="/1.5/fluent/driver.html">
Driver
</a>
</li>
<li class="">
<a href="/1.5/fluent/model.html">
Model
</a>
</li>
<li class="">
<a href="/1.5/fluent/query.html">
Query
</a>
</li>
<li class="">
<a href="/1.5/fluent/relation.html">
Relation
</a>
</li>
</ul>
</section>
<section>
<h3>Auth</h3>
<ul>
<li class="">
<a href="/1.5/auth/user.html">
User
</a>
</li>
<li class="">
<a href="/1.5/auth/middleware.html">
Middleware
</a>
</li>
<li class="">
<a href="/1.5/auth/request.html">
Request
</a>
</li>
<li class="">
<a href="/1.5/auth/protect.html">
Protect
</a>
</li>
</ul>
</section>
<section>
<h3>HTTP</h3>
<ul>
<li class="">
<a href="/1.5/http/request.html">
Request
</a>
</li>
<li class="">
<a href="/1.5/http/response.html">
Response
</a>
</li>
<li class="">
<a href="/1.5/http/body.html">
Body
</a>
</li>
<li class="">
<a href="/1.5/http/response-representable.html">
ResponseRepresentable
</a>
</li>
<li class="">
<a href="/1.5/http/responder.html">
Responder
</a>
</li>
<li class="">
<a href="/1.5/http/client.html">
Client
</a>
</li>
<li class="">
<a href="/1.5/http/server.html">
Server
</a>
</li>
<li class="">
<a href="/1.5/http/cors.html">
CORS
</a>
</li>
</ul>
</section>
<section>
<h3>WebSockets</h3>
<ul>
<li class="">
<a href="/1.5/websockets/droplet.html">
Droplet
</a>
</li>
<li class="">
<a href="/1.5/websockets/custom.html">
Custom
</a>
</li>
</ul>
</section>
<section>
<h3>Testing</h3>
<ul>
<li class="">
<a href="/1.5/testing/modules.html">
Modules
</a>
</li>
<li class="">
<a href="/1.5/testing/basic.html">
Basic
</a>
</li>
</ul>
</section>
<section>
<h3>Deploy</h3>
<ul>
<li class="">
<a href="/1.5/deploy/nginx.html">
Nginx
</a>
</li>
<li class="">
<a href="/1.5/deploy/supervisor.html">
Supervisor
</a>
</li>
</ul>
</section>
<section>
<h3>Version (1.5)</h3>
<ul>
<li class="">
<a href="/1.5/switch/1_5.html">
1.5
</a>
</li>
<li class="">
<a href="/1.5/switch/2_0.html">
2.0
</a>
</li>
</ul>
</section>
</div>
</nav>
<main>
<a href="https://github.com/vapor/documentation/blob/master/CONTRIBUTING.md" class="edit">✎ Edit on GitHub</a>
<h1 id="provider">Provider</h1>
<p>The <code>Provider</code> protocol creates a simple and predictable way for adding functionality and third party packages to your Vapor project.</p>
<h2 id="adding-a-provider">Adding a Provider</h2>
<p>Adding a provider to your application takes 2-3 steps.</p>
<h3 id="add-package">Add Package</h3>
<p>All of Vapor's providers end with the <code>-provider</code> syntax. You can see a list of <a href="https://github.com/vapor?utf8=✓&amp;q=-provider">available providers</a> by searching on our GitHub.</p>
<p>To add the provider to your package, add it as a dependency in your <code>Package.swift</code> file.</p>
<pre><code class="language-swift">let package = Package(
name: "MyApp",
dependencies: [
.Package(url: "https://github.com/vapor/vapor.git", majorVersion: 1, minor: 0),
.Package(url: "https://github.com/vapor/mysql-provider.git", majorVersion: 1, minor: 0)
]
)</code></pre>
<blockquote>
<p>It's important to <code>vapor clean</code> or <code>vapor build --clean</code> after adding new packages.</p>
</blockquote>
<h3 id="import">Import</h3>
<p>Once the provider has been added, you can import it using <code>import VaporFoo</code> where <code>Foo</code> is the name of the provider.</p>
<p>Here is what importing the MySQL provider looks like:</p>
<pre><code class="language-swift">import Vapor
import VaporMySQL
let drop = Droplet()
try drop.addProvider(VaporMySQL.Provider.self)
// ...
drop.run()</code></pre>
<p>Every provider comes with a class named <code>Provider</code>. Append the <code>Type</code> of this class to your <code>providers</code> array in the <code>Droplet</code>'s init method.</p>
<h3 id="config">Config</h3>
<p>Some drivers may require a configuration file. For example, <code>VaporMySQL</code> requires a <code>Config/mysql.json</code> file like the following:</p>
<pre><code class="language-json">{
"host": "localhost",
"user": "root",
"password": "",
"database": "vapor"
}</code></pre>
<p>You will receive an error during the <code>Droplet</code>'s initialization if a configuration file is required.</p>
<h2 id="advanced">Advanced</h2>
<p>You may choose to initialize the provider yourself. </p>
<pre><code class="language-swift">import Vapor
import VaporMySQL
let drop = Droplet()
let mysql = try VaporMySQL.Provider(host: "localhost", user: "root", password: "", database: "vapor")
drop.addProvider(mysql)
...
drop.run()</code></pre>
<h2 id="create-a-provider">Create a Provider</h2>
<p>Creating a provider is easy, you just need to create a package with a class <code>Provider</code> that conforms to <code>Vapor.Provider</code>.</p>
<h3 id="example">Example</h3>
<p>Here is what a provider for an example <code>Foo</code> package would look like. All the provider does is take a message, then print the message when the <code>Droplet</code> starts.</p>
<pre><code class="language-swift">import Vapor
public final class Provider: Vapor.Provider {
public let message: String
public let provided: Providable
public convenience init(config: Config) throws {
guard let message = config["foo", "message"].string else {
throw SomeError
}
try self.init(message: message)
}
public init(message: String) throws {
self.message = message
}
public func afterInit(_ drop: Droplet) {
}
public func beforeServe(_ drop: Droplet) {
drop.console.info(message)
}
}</code></pre>
<p>This provider wil require a <code>Config/foo.json</code> file that looks like:</p>
<pre><code class="language-json">{
"message": "The message to output"
}</code></pre>
<p>The provider can also be initialized manually with the <code>init(message: String)</code> init.</p>
</main>
<script src="//code.jquery.com/jquery-1.11.0.min.js"></script>
<script src="/1.5/scripts/highlight.pack.js"></script>
<script>
hljs.registerLanguage("leaf", function (hljs) {
/* Author: Hale Chan <halechan@qq.com> */
return {
c: [
{
cN: 'function',
b: '#+',
e: '[)] ',
rB: true,
eE: false,
c : [
{
b: '[(]',
e: '[)]',
eE: true,
c: [
{
cN: 'string',
b: '"',
e: '"'
},
{
cN: 'title',
b: '[A-Za-z_][A-Za-z_0-9]*'
}
]
},
{
cN: 'keyword',
b: '#+([A-Za-z$_][0-9A-Za-z$_]*)?',
eP: true
},
]
}
]
};
});
</script>
<script>
$(function() {
// Syntax highlighting
hljs.initHighlightingOnLoad();
if (navigator.userAgent.indexOf('Safari') != -1 && navigator.userAgent.indexOf('Chrome') == -1) {
$('body').addClass('safari');
}
$('h1, h2, h3, h4, h5, h6').each(function(key, item) {
var $item = $(item);
var id = $item.attr('id');
if (id) {
var link = $('<a>');
link.attr('href', '#' + id);
$item.wrap(link);
}
})
$('a.toggle').on('click', function(e){
e.preventDefault();
console.log('hi');
var body = $('body');
if (body.hasClass('toggled')) {
body.removeClass('toggled');
} else {
body.addClass('toggled');
}
})
var lastScroll = 0;
var isUp = false;
var win = $(window);
win.on('scroll', function(){
var scrollTop = win.scrollTop();
var scrollBottom = win.scrollTop() + win.height();
var docHeight = $(document).height();
if ( scrollTop < 0 || scrollBottom >= docHeight ){
return;
}
if (scrollTop > (lastScroll + 0) && scrollTop >= 0) {
if (!isUp) {
$('a.toggle.show').addClass('hide')
}
isUp = true;
lastScroll = scrollTop;
} else if (scrollTop < (lastScroll - 0)) {
if (isUp) {
$('a.toggle.show').removeClass('hide')
}
isUp = false;
lastScroll = scrollTop;
}
});
// scroll to the active nav item
$("nav .scroll").animate({
scrollTop: $("nav .active").offset().top - 157
}, 0);
// var lastScrollTop = 0;
// $(window).scroll(function(event){
// var st = $(this).scrollTop();
// if (st > lastScrollTop){
// $('a.toggle.show').addClass('hide')
// } else {
// $('a.toggle.show').removeClass('hide')
// }
// lastScrollTop = st;
// });
});
</script>
<script>
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');
ga('create', 'UA-76177358-4', 'auto');
ga('send', 'pageview');
</script>
</body>
</html>