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<?php |
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namespace CWP\Core\Control; |
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use SilverStripe\Control\HTTPRequest; |
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use SilverStripe\Control\Middleware\HTTPMiddleware; |
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use SilverStripe\Core\Config\Configurable; |
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use SilverStripe\Core\Environment; |
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/** |
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* Initialises CWP-specific configuration settings, to avoid _config.php. |
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*/ |
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class InitialisationMiddleware implements HTTPMiddleware |
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{ |
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use Configurable; |
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/** |
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* Enable egress proxy. This works on the principle of setting http(s)_proxy environment variables, |
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* which will be automatically picked up by curl. This means RestfulService and raw curl |
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* requests should work out of the box. Stream-based requests need extra manual configuration. |
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* Refer to https://www.cwp.govt.nz/guides/core-technical-documentation/common-web-platform-core/en/how-tos/external_http_requests_with_proxy |
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* |
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* @config |
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* @var bool |
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*/ |
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private static $egress_proxy_default_enabled = true; |
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/** |
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* Configure the list of domains to bypass proxy by setting the NO_PROXY environment variable. |
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* 'services.cwp.govt.nz' needs to be present for Solr and Docvert internal CWP integration. |
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* 'localhost' is necessary for accessing services on the same instance such as tika-server for text extraction. |
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* |
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* @config |
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* @var string[] |
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*/ |
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private static $egress_proxy_exclude_domains = [ |
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'services.cwp.govt.nz', |
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'localhost', |
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]; |
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public function process(HTTPRequest $request, callable $delegate) |
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{ |
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if ($this->config()->get('egress_proxy_default_enabled')) { |
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$this->configureEgressProxy(); |
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} |
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$this->configureProxyDomainExclusions(); |
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return $delegate($request); |
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} |
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/** |
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* If the outbound egress proxy details have been defined in environment variables, configure the proxy |
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* variables that are used to configure it. |
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*/ |
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protected function configureEgressProxy() |
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{ |
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if (!Environment::getEnv('SS_OUTBOUND_PROXY') |
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|| !Environment::getEnv('SS_OUTBOUND_PROXY_PORT') |
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) { |
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return; |
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} |
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$proxy = Environment::getEnv('SS_OUTBOUND_PROXY'); |
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$proxyPort = Environment::getEnv('SS_OUTBOUND_PROXY_PORT'); |
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Environment::setEnv('http_proxy', $proxy . ':' . $proxyPort); |
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Environment::setEnv('https_proxy', $proxy . ':' . $proxyPort); |
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} |
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/** |
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* Configure any domains that should be excluded from egress proxy rules and provide them to the environment |
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*/ |
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protected function configureProxyDomainExclusions() |
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{ |
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$noProxy = $this->config()->get('egress_proxy_exclude_domains'); |
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if (empty($noProxy)) { |
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return; |
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} |
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if (!is_array($noProxy)) { |
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$noProxy = [$noProxy]; |
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} |
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// Merge with exsiting if needed. |
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if (Environment::getEnv('NO_PROXY')) { |
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$noProxy = array_merge(explode(',', Environment::getEnv('NO_PROXY')), $noProxy); |
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} |
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Environment::setEnv('NO_PROXY', implode(',', array_unique($noProxy))); |
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} |
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} |
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silverstripe /
cwp-core
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