[HttpClient] ignore the body of responses to HEAD requests

Author: nicolas-grekas

CurlHttpClient.php

@@ -197,6 +197,8 @@ public function request(string $method, string $url, array $options = []): Respo
         if ('POST' === $method) {
             // Use CURLOPT_POST to have browser-like POST-to-GET redirects for 301, 302 and 303
             $curlopts[CURLOPT_POST] = true;
+        } elseif ('HEAD' === $method) {
+            $curlopts[CURLOPT_NOBODY] = true;
         } else {
             $curlopts[CURLOPT_CUSTOMREQUEST] = $method;
         }

Response/MockResponse.php

@@ -176,7 +176,7 @@ protected static function perform(ClientState $multi, array &$responses): void
                 try {
                     $offset = 0;
                     $chunk[1]->getStatusCode();
-                    $response->headers = $chunk[1]->getHeaders(false);
+                    $chunk[1]->getHeaders(false);
                     self::readResponse($response, $chunk[0], $chunk[1], $offset);
                     $multi->handlesActivity[$id][] = new FirstChunk();
                 } catch (\Throwable $e) {

Response/NativeResponse.php

@@ -174,8 +174,16 @@ private function open(): void
             $this->inflate = null;
         }
 
-        $this->multi->openHandles[$this->id] = [$h, $this->buffer, $this->inflate, $this->content, $this->onProgress, &$this->remaining, &$this->info];
         $this->multi->handlesActivity[$this->id] = [new FirstChunk()];
+
+        if ('HEAD' === $context['http']['method']) {
+            $this->multi->handlesActivity[$this->id][] = null;
+            $this->multi->handlesActivity[$this->id][] = null;
+
+            return;
+        }
+
+        $this->multi->openHandles[$this->id] = [$h, $this->buffer, $this->inflate, $this->content, $this->onProgress, &$this->remaining, &$this->info];
     }
 
     /**