public function handle($request, Closure $next, $options = [])
    {
        $response = $next($request);

        if (! $request->isMethodCacheable() || ! $response->getContent()) {
            return $response;
        }

        if (is_string($options)) {
            $options = $this->parseOptions($options);
        }

        if (isset($options['etag']) && $options['etag'] === true) {
            $options['etag'] = md5($response->getContent());
        }

        $response->setCache($options);
        $response->isNotModified($request);

        return $response;
    }
public function handle($request, Closure $next, $options = [])
    {
        $response = $next($request);

        if (! $request->isMethodCacheable() || ! $response->getContent()) {
            return $response;
        }

        if (is_string($options)) {
            $options = $this->parseOptions($options);
        }

        if (isset($options['etag']) && $options['etag'] === true) {
            $options['etag'] = md5($response->getContent());
        }

        $response->setCache($options);
        $response->isNotModified($request);

        return $response;
    }
public function handle ( $ request , Closure $ next , $ options = [ ] ) { $ response = $ next ( $ request ) ; if ( ! $ request -> isMethodCacheable ( ) || ! $ response -> getContent ( ) ) { return $ response ; } if ( is_string ( $ options ) ) { $ options = $ this -> parseOptions ( $ options ) ; } if ( isset ( $ options [ 'etag' ] ) && $ options [ 'etag' ] === true ) { $ options [ 'etag' ] = md5 ( $ response -> getContent ( ) ) ; } $ response -> setCache ( $ options ) ; $ response -> isNotModified ( $ request ) ; return $ response ; }
Add cache related HTTP headers.

@param  \Illuminate\Http\Request  $request
@param  \Closure  $next
@param  string|array  $options
@return \Symfony\Component\HttpFoundation\Response

@throws \InvalidArgumentException
Add cache related HTTP headers .