README

Service to route HTTP/REST requests to your own controllers.

BEWARE: This extension is expected to be used by TYPO3 developers and acts as a central hub to route requests to your own business logic.

Features

Support for authenticated method calls
Support for localized calls (taking the language into account)
Support for cached calls and transparent access to the TYPO3 caching framework within your API handler
Support for gzip payload if header HTTP_ACCEPT_ENCODING is present and contains gzip
Support for dynamically generating a documentation of your API
Automatic flushing of cache entries when editing records in Backend (use <table-name>%<uid> in the list of corresponding tags)

In addition, this supports dependency injection for your API handlers, you just need to use @inject or methods prefixed by inject, as well-known when programming with Extbase.

Difference with EXT:routing

Unlike EXT:routing, this extension does not force you to map Extbase controller/actions to route segments but instead basically lets you register a "segment" (typically the first one) and then will simply route the whole request to a handle() method within your controller.

Registration of handlers

First of all you should add a dependency within your ext_emconf.php configuration file, either as a real constraint, or as a suggestion, depending on what you prefer:

$EM_CONF[$_EXTKEY] = [
    // snip
    'constraints' => [
        'depends' => [
            'php' => '5.5.0-7.1.99',
            'typo3' => '7.6.0-8.99.99',
        ],
        'conflicts' => [],
        'suggests' => [
            'simple_api' => '',
        ],
    ],
];

Then, within ext_localconf.php:

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['simple_api']['apiHandlers'][] = [
    'route' => '/some-route',
    'class' => \VENDOR\YourExt\Api\YourClass::class,
];

you may register a pattern instead of a fixed route:

$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['simple_api']['apiPatternHandlers'][] = [
    'route' => '/members/\d+/history',
    'class' => \VENDOR\YourExt\Api\YourClass::class,
];

Your handler must extend \Causal\SimpleApi\Controller\AbstractHandler.

Handler Keys

The registration array supports various keys:

route [mandatory]: The route to register.
class [mandatory]: The class handling requests to the corresponding route.
contentType [optional]: Content type of the payload accepted by a POST request, will decode it automatically before invoking your handler.
methods [optional]: The comma-separated list of HTTP methods accepted by the handler (e.g., "POST"). Defaults to no restrictions.
restricted [optional]: Whether the API call expects an authenticated call (using HTTP_X_AUTHORIZATION header). If restricting access to part of your API, you must register a route with name /authenticate which will get the HTTP_X_AUTHORIZATION header, do something with it and return an array with following keys:
- success => true (or false). Will be passed as _authenticated boolean flag to the API handler
- Custom keys will be prefixed by _ and passed as-is to the API handler (e.g., user will become _user)
- Custom boolean flag demo may be used to specify that the authentication succeeded but with "demonstration" capabilities. This needs to be then handled in your API controller by checking, as expected, boolean flag parameter _demo.
Hint: If HTTP_X_AUTHORIZATION header is present, the authentication will take place and your handler will be invoked regardless of the outcome of the call, if you did not explicitely marked your handler as "restricted".
deprecated [optional]: Boolean flag to mark the corresponding route as deprecated in the documentation.

Payload

Following rules apply with the payload you return from your API handler:

Payload is expected to be an array and will be returned as content-type application/json. If you want to return another content-type (such as an image), you should do it in your own API handler and exit() afterwards.
If an exception is thrown, it is catched and encapsulated into a HTTP 500 error. The only exception is if exception \Causal\SimpleApi\Exception\ForbiddenException is thrown, it will throw a HTTP 403 error instead.
If no handlers are found, a HTTP 404 error is returned.

Known Issues and Workaround

Extbase repositories may be used within your API handlers but you need to manually invoke method includeTCA() from the base class in order for the Extbase mapping to be available to returned objects. This call should typically be part of the initialize() method you can override in your handler and which is called before invoking handle().

BEWARE: If you don't properly include the TCA of your domain model, you may corrupt the Extbase datamap cache by storing incomplete mapping definition into the cache backend for extbase_datamapfactory_datamap (e.g., table cf_extbase_datamapfactory_datamap with out-of-the-box TYPO3 settings). In such case, you will need to flush that cache manually.

Installation

Clone this repository into typo3conf/ext/simple_api:

cd /path/to/typo3conf/ext/
git clone https://github.com/xperseguers/t3ext-simple_api.git simple_api

Alternatively, you may load it via composer:

composer require causal/simple_api

Go to Extension Manager and activate extension simple_api
Add a rewrite rule to your .htaccess. E.g.,
```
RewriteRule ^api/(.*)$ /index.php?eID=simple_api&route=$1 [QSA,L]
```
or, if you are using Nginx:
```
rewrite ^/api/(.*)$ /index.php?eID=simple_api&route=$1 last;
```
This will have the effect of using this extension for handling requests starting with api/.

Hint: If you need to support localization (&L=<some-language-uid>), then you should change the suggesting routing above to include the root page uid of your website (&id=<some-uid>). This is needed because localization mode and default language may differ in complex environments and thus cannot be inferred.

causal / simple_api

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