Ensure HTTP server port is available (#852)

* Ensure HTTP server port is available

* Uses specific code for frankenphp

* Update InteractsWithServers.php

* Update StartRoadRunnerCommand.php

---------

Co-authored-by: Nuno Maduro <[email protected]>
Co-authored-by: Taylor Otwell <[email protected]>

Author: 3 people

src/Commands/Concerns/InteractsWithServers.php

@@ -144,6 +144,26 @@ protected function getPort()
         return $this->option('port') ?? config('octane.port') ?? $_ENV['OCTANE_PORT'] ?? '8000';
     }
 
+    /**
+     * Ensure the Octane HTTP server port is available.
+     *
+     * @return void
+     */
+    protected function ensurePortIsAvailable(): void
+    {
+        $host = $this->getHost();
+
+        $port = $this->getPort();
+
+        $connection = @fsockopen($host, $port);
+
+        if (is_resource($connection)) {
+            @fclose($connection);
+
+            throw new InvalidArgumentException("Unable to start server. Port {$port} is already in use.");
+        }
+    }
+
     /**
      * Returns the list of signals to subscribe.
      */

src/Commands/StartFrankenPhpCommand.php

@@ -59,7 +59,7 @@ class StartFrankenPhpCommand extends Command implements SignalableCommandInterfa
     public function handle(ServerProcessInspector $inspector, ServerStateFile $serverStateFile)
     {
         $this->ensureFrankenPhpWorkerIsInstalled();
-        $this->ensureHostsAreAvailable();
+        $this->ensurePortIsAvailable();
 
         $frankenphpBinary = $this->ensureFrankenPhpBinaryIsInstalled();
 
@@ -116,7 +116,7 @@ public function handle(ServerProcessInspector $inspector, ServerStateFile $serve
      *
      * @return void
      */
-    protected function ensureHostsAreAvailable()
+    protected function ensurePortIsAvailable()
     {
         $host = $this->getHost();
 

src/Commands/StartRoadRunnerCommand.php

@@ -64,6 +64,8 @@ public function handle(ServerProcessInspector $inspector, ServerStateFile $serve
 
         $roadRunnerBinary = $this->ensureRoadRunnerBinaryIsInstalled();
 
+        $this->ensurePortIsAvailable();
+
         if ($inspector->serverIsRunning()) {
             $this->error('RoadRunner server is already running.');
 

src/Commands/StartSwooleCommand.php

@@ -60,6 +60,8 @@ public function handle(
             return 1;
         }
 
+        $this->ensurePortIsAvailable();
+
         if ($inspector->serverIsRunning()) {
             $this->error('Server is already running.');