zendframework 3 - service execute twice - zend-framework3

Question

I have created a personalized service to determine the users' language.
I call my service inside the Module class of my Moduel.php like this:
$languageService = $sm->get("LanguageService");
$languageService->setLanguage();
The configuration of the service is instead found inside the global.php configuration file as well as the code below.
'service_manager' => [
'factories' => [
\Application\Service\LanguageService::class => \Application\Service\Factory\LanguageServiceFactory::class
],
'aliases'=>[
'LanguageService'=>\Application\Service\LanguageService::class
]
],
The problem using xdebug the code is executed twice (constructor and methods)
I have noticed that the code is actually executed twice. The first time the url of the request is / therefore my index. The second call is the url /css/bootstrap-select.css.map. I think it's an internal call to the plugin. I do not think the behavior is correct.

Answer 1

The behaviour is correct. You have a problem with your server. I do not know the fix for nginx type, but for Apache, using .htaccess you should add a bit of code that serves files from the public directory straight away instead of going through the application.
By default, the Zend Skeleton Application comes with the following .htaccess file content in the public/ directory (source):
RewriteEngine On
# The following rule tells Apache that if the requested filename
# exists, simply serve it.
RewriteCond %{REQUEST_FILENAME} -s [OR]
RewriteCond %{REQUEST_FILENAME} -l [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^.*$ - [L]
# The following rewrites all other queries to index.php. The
# condition ensures that if you are using Apache aliases to do
# mass virtual hosting or installed the project in a subdirectory,
# the base path will be prepended to allow proper resolution of
# the index.php file; it will work in non-aliased environments
# as well, providing a safe, one-size fits all solution.
RewriteCond %{REQUEST_URI}::$1 ^(/.+)/(.*)::\2$
RewriteRule ^(.*) - [E=BASE:%1]
RewriteRule ^(.*)$ %{ENV:BASE}/index.php [L]
The project root directory does not come with an .htaccess file. If you correctly map your server to use the project public/ directory as the projects access point, you won't need it.
Based on comment discussion, I'm assuming somewhere some config is not correct and is directing the /css/* requests to the project root. To make sure that those requests do not enter the project I have the following .htaccess in my project root:
RewriteEngine On
# If URL to the application is http://foo.com/path/to/ZendSkeletonApplication/
# the set the base to /path/to/ZendSkeletonApplication/
RewriteBase /
# Remove trailing slash
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)/$ /$1 [L,R=301]
# Below is ZF2 default
RewriteRule ^\.htaccess$ - [F]
RewriteCond %{REQUEST_URI} =""
RewriteRule ^.*$ public/index.php [NC,L]
RewriteCond %{REQUEST_URI} !^/public/.*$
RewriteRule ^(.*)$ public/$1
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule ^.*$ - [NC,L]
RewriteRule ^public/.*$ public/index.php [NC,L]
Not very pretty, but it gets the job done.