[BUGFIX] Use full url to the distribution images in XML file

extensions/ter_fe2/Classes/Service/ExtensionIndexService.php

@@ -16,6 +16,8 @@ use Psr\Log\LoggerAwareInterface;
 use Psr\Log\LoggerAwareTrait;
 use T3o\Ter\Api\Configuration;
 use T3o\Ter\Exception\InternalServerErrorException;
+use TYPO3\CMS\Core\Resource\ResourceFactory;
+use TYPO3\CMS\Core\Site\SiteFinder;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 
 /**
@@ -117,6 +119,13 @@ class ExtensionIndexService implements LoggerAwareInterface
         $dom = new \DOMDocument('1.0', 'utf-8');
         $dom->formatOutput = true;
         $extensionsObj = $dom->appendChild(new \DOMElement('extensions'));
+        $distributionBaseUrl = implode(
+            '',
+            [
+                (string)GeneralUtility::makeInstance(SiteFinder::class)->getSiteByIdentifier('extensions')->getBase() . '/',
+                ResourceFactory::getInstance()->getDefaultStorage()->getFolder('ter')->getPublicUrl()
+            ]
+        );
 
         // Create the nested XML structure:
         foreach ($extensionsAndVersionsArr as $extensionKey => $extensionVersionsArr) {
@@ -144,10 +153,22 @@ class ExtensionIndexService implements LoggerAwareInterface
                     $distributionImage = $prefixDistributionFilePath . 'Distribution.png';
                     $distributionWelcomeImage = $prefixDistributionFilePath . 'DistributionWelcome.png';
                     if (is_file($this->basePath . $distributionImage)) {
-                        $versionObj->appendChild(new \DOMElement('distributionImage', $this->xmlentities($distributionImage)));
+                        $distributionImageUrl = $distributionBaseUrl . $distributionImage;
+                        $versionObj->appendChild(
+                            new \DOMElement(
+                                'distributionImage',
+                                $this->xmlentities($distributionImageUrl)
+                            )
+                        );
                     }
                     if (is_file($this->basePath . $distributionWelcomeImage)) {
-                        $versionObj->appendChild(new \DOMElement('distributionImageWelcome', $this->xmlentities($distributionWelcomeImage)));
+                        $distributionWelcomeImageUrl = $distributionBaseUrl . $distributionWelcomeImage;
+                        $versionObj->appendChild(
+                            new \DOMElement(
+                                'distributionImageWelcome',
+                                $this->xmlentities($distributionWelcomeImageUrl)
+                            )
+                        );
                     }
                 }
                 $versionObj->appendChild(