check whether index is set before using it
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@ -269,7 +269,8 @@ class OC_Installer{
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//download the file if necessary
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if($data['source']=='http') {
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$pathInfo = pathinfo($data['href']);
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$path = \OC::$server->getTempManager()->getTemporaryFile('.' . $pathInfo['extension']);
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$extension = isset($pathInfo['extension']) ? '.' . $pathInfo['extension'] : '';
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$path = \OC::$server->getTempManager()->getTemporaryFile($extension);
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if(!isset($data['href'])) {
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throw new \Exception($l->t("No href specified when installing app from http"));
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}
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