TYPO3 Core

OK, i didn't know that - sorry. Documentation only said "can be injected via constructor in a class", so i thought ...

It's used like this in frontend context (simplified example, upgraded from v12):

    public function render(): string
    {
        $uriBuilder = GeneralUtility::makeInstance(UriBuilder::class);

        $request = $GLOBALS['TYPO3_REQUEST'];
        $uriBuilderRequest = new Request(
            $request->withAttribute('extbase', new ExtbaseRequestParameters())
        );

        $uri = $uriBuilder
            ->reset()
            ->setRequest($uriBuilderRequest)
            ->setTargetPageType(1234567)
            ->setCreateAbsoluteUri(true)
            ->uriFor(
                'download',
                [ 'guid' => $guid ],
                'Download',
                'ExtensionName',
                'PluginName'
            );

        return $uri;
    }

The hint to the f:link.action ViewHelper was helpful - replacing

$request = $GLOBALS['TYPO3_REQUEST'];

$request = $this->renderingContext->getAttribute(ServerRequestInterface::class);

Thanks for getting back so quick. I'll see to update the docs to specifically mention this, and will close the issue when I have done so, yes?

yes, thank's for your help