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August 31, 2018 13:04
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A TYPO3 Flow HTTP component that detects the user agent language and redirects to the corresponding URL if no language has been requested explicitly.
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| <?php | |
| namespace Wwwision\Test\Http; | |
| /* * | |
| * This script belongs to the TYPO3 Flow package "Wwwision.Test". * | |
| * * | |
| * */ | |
| use TYPO3\Flow\Annotations as Flow; | |
| use TYPO3\Flow\Http\Component\ComponentChain; | |
| use TYPO3\Flow\Http\Component\ComponentContext; | |
| use TYPO3\Flow\Http\Component\ComponentInterface; | |
| use TYPO3\Flow\I18n\Detector; | |
| use TYPO3\Flow\I18n\Locale; | |
| use TYPO3\Neos\Domain\Service\ContentDimensionPresetSourceInterface; | |
| /** | |
| * A HTTP component that detects the user agent language and redirects to a corresponding section | |
| */ | |
| class DetectLanguageComponent implements ComponentInterface { | |
| /** | |
| * @Flow\Inject | |
| * @var Detector | |
| */ | |
| protected $localeDetector; | |
| /** | |
| * @Flow\Inject | |
| * @var ContentDimensionPresetSourceInterface | |
| */ | |
| protected $contentDimensionPresetSource; | |
| /** | |
| * @var array | |
| */ | |
| protected $options; | |
| /** | |
| * @param array $options The component options | |
| */ | |
| public function __construct(array $options = array()) { | |
| $this->options = $options; | |
| } | |
| /** | |
| * @param ComponentContext $componentContext | |
| * @return void | |
| */ | |
| public function handle(ComponentContext $componentContext) { | |
| $httpRequest = $componentContext->getHttpRequest(); | |
| $requestPath = $httpRequest->getUri()->getPath(); | |
| $firstRequestPathSegment = explode('/', ltrim($requestPath, '/'))[0]; | |
| if (in_array($firstRequestPathSegment, $this->options['ignoreSegments'])) { | |
| return; | |
| } | |
| $preset = $this->contentDimensionPresetSource->findPresetByUriSegment('language', $firstRequestPathSegment); | |
| // first request path segment corresponds to a valid language preset -> no need to redirect | |
| if ($preset !== NULL) { | |
| return; | |
| } | |
| $detectedLocale = $this->localeDetector->detectLocaleFromHttpHeader($httpRequest->getHeader('Accept-Language')); | |
| if (!$detectedLocale instanceof Locale) { | |
| return; | |
| } | |
| $uri = $httpRequest->getUri(); | |
| $uri->setPath('/' . $detectedLocale->getLanguage() . $requestPath); | |
| $httpResponse = $componentContext->getHttpResponse(); | |
| $httpResponse->setContent(sprintf('<html><head><meta http-equiv="refresh" content="0;url=%s"/></head></html>', htmlentities((string)$uri, ENT_QUOTES, 'utf-8'))); | |
| $httpResponse->setStatus(303); | |
| $httpResponse->setHeader('Location', (string)$uri); | |
| $componentContext->setParameter(ComponentChain::class, 'cancel', TRUE); | |
| } | |
| } |
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| TYPO3: | |
| Flow: | |
| http: | |
| chain: | |
| 'preprocess': | |
| chain: | |
| 'detectLanguage': | |
| component: 'Wwwision\Test\Http\DetectLanguageComponent' | |
| componentOptions: | |
| ignoreSegments: ['', 'neos'] |
How much this affects the site SEO?
Please have a look at my fork:
Added ignorePattern instead of ignoreSegments. Also handled to not redirect if no preset exists for detected language.
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I would suggest to match the languages from
Accept-Languageagainst the configured dimension presets (which have to follow some convention or need an additionallocaleIdentifier), that's safer because not every locale will be available as a language preset in most systems.