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89 lines
2.9 KiB
Markdown
89 lines
2.9 KiB
Markdown
# Shlink Common
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This library provides some utils and conventions for web apps. It's main purpose is to be used on [Shlink](https://github.com/shlinkio/shlink) project, but any PHP project can take advantage.
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Most of the elements it provides require a [PSR-11] container, and it's easy to integrate on [expressive] applications thanks to the `ConfigProvider` it includes.
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## Install
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Install this library using composer:
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composer require shlinkio/shlink-common
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> This library is also an expressive module which provides its own `ConfigProvider`. Add it to your configuration to get everything automatically set up.
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## Cache
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A [doctrine cache] adapter is registered, which returns different instances depending on your configuration:
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* An `ArrayCache` instance when the `debug` config is set to true or when the APUc extension is not installed and the `cache.redis` config is not defined.
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* An `ApcuCache`instance when no `cache.redis` is defined and the APCu extension is installed.
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* A `PredisCache` instance when the `cache.redis` config is defined.
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Any of the adapters will use the namespace defined in `cache.namespace` config entry.
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```php
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<?php
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declare(strict_types=1);
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return [
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'debug' => false,
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'cache' => [
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'namespace' => 'my_namespace',
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'redis' => [
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'servers' => [
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'tcp://1.1.1.1:6379',
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'tcp://2.2.2.2:6379',
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'tcp://3.3.3.3:6379',
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],
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],
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],
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];
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```
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When the `cache.redis` config is provided, a set of servers is expected. If only one server is provided, this library will treat it as a regular server, but if several servers are defined, it will treat them as a redis cluster and expect the servers to be configured as such.
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## Middlewares
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This module provides a set of useful middlewares, all registered as services in the container:
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* **CloseDatabaseConnectionMiddleware**:
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Should be an early middleware in the pipeline. It makes use of the EntityManager that ensure the database connection is closed at the end of the request.
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It should be used when serving an app with a non-blocking IO server (like Swoole or ReactPHP), which persist services between requests.
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* **LocaleMiddleware**:
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Sets the locale in the translator, based on the `Accapt-Language` header.
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* **IpAddress** (from [akrabat/ip-address-middleware] package):
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Improves detection of the remote IP address.
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The set of headers which are inspected in order to search for the address can be customized using this configuration:
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```php
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<?php
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declare(strict_types=1);
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return [
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'ip_address_resolution' => [
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'headers_to_inspect' => [
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'CF-Connecting-IP',
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'True-Client-IP',
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'X-Real-IP',
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'Forwarded',
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'X-Forwarded-For',
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'X-Forwarded',
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'X-Cluster-Client-Ip',
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'Client-Ip',
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],
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],
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];
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```
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