fix: address Greptile review comments on PR #230

- Remove Content-Length before re-adding after compression to prevent duplicate headers
- Defer onStart callback into coroutine event loop for SwooleCoroutine adapter consistency
- Add null-coalescing fallback for preg_replace in View::render
- Add void return types to compression setter methods for API consistency

Author: ChiragAgg5k

src/Http/Adapter/SwooleCoroutine/Server.php

@@ -14,6 +14,8 @@ class Server extends Adapter
     protected SwooleServer $server;
     protected const REQUEST_CONTAINER_CONTEXT_KEY = '__utopia_http_request_container';
     protected Container $container;
+    /** @var callable|null */
+    protected $onStartCallback = null;
 
     public function __construct(string $host, ?string $port = null, array $settings = [], ?Container $container = null)
     {
@@ -55,12 +57,15 @@ public function getServer(): SwooleServer
 
     public function onStart(callable $callback)
     {
-        \call_user_func($callback, $this);
+        $this->onStartCallback = $callback;
     }
 
     public function start()
     {
         go(function () {
+            if ($this->onStartCallback) {
+                \call_user_func($this->onStartCallback, $this);
+            }
             $this->server->start();
         });
     }

src/Http/Http.php

@@ -152,23 +152,23 @@ public function __construct(Adapter $server, string $timezone)
     /**
      * Set Compression
      */
-    public function setCompression(bool $compression)
+    public function setCompression(bool $compression): void
     {
         $this->compression = $compression;
     }
 
     /**
      * Set minimum compression size
      */
-    public function setCompressionMinSize(int $compressionMinSize)
+    public function setCompressionMinSize(int $compressionMinSize): void
     {
         $this->compressionMinSize = $compressionMinSize;
     }
 
     /**
      * Set supported compression algorithms
      */
-    public function setCompressionSupported(mixed $compressionSupported)
+    public function setCompressionSupported(mixed $compressionSupported): void
     {
         $this->compressionSupported = $compressionSupported;
     }

src/Http/Response.php

@@ -626,6 +626,7 @@ public function send(string $body = ''): void
 
             if ($algorithm) {
                 $body = $algorithm->compress($body);
+                $this->removeHeader('Content-Length');
                 $this->addHeader('Content-Length', (string) \strlen($body));
                 $this->addHeader('Content-Encoding', $algorithm->getContentEncoding());
                 $this->addHeader('X-Utopia-Compression', 'true');

src/Http/View.php

@@ -293,7 +293,7 @@ public function render(bool $minify = true): string
                 '\\1',
             ];
 
-            $html = \preg_replace($search, $replace, $html);
+            $html = \preg_replace($search, $replace, $html) ?? $html;
 
             // Replacing back with content
             $html = \str_replace(\array_map(function ($el) {