diff --git a/src/Symfony/Component/HttpClient/Response/CurlResponse.php b/src/Symfony/Component/HttpClient/Response/CurlResponse.php
index a65004675db8d..29f82ac9b7ced 100644
--- a/src/Symfony/Component/HttpClient/Response/CurlResponse.php
+++ b/src/Symfony/Component/HttpClient/Response/CurlResponse.php
@@ -123,6 +123,19 @@ public function __construct(CurlClientState $multi, $ch, array $options = null,
         }
 
         curl_setopt($ch, \CURLOPT_WRITEFUNCTION, static function ($ch, string $data) use ($multi, $id): int {
+            if ('H' === (curl_getinfo($ch, \CURLINFO_PRIVATE)[0] ?? null)) {
+                $multi->handlesActivity[$id][] = null;
+                $multi->handlesActivity[$id][] = new TransportException(sprintf('Unsupported protocol for "%s"', curl_getinfo($ch, \CURLINFO_EFFECTIVE_URL)));
+
+                return 0;
+            }
+
+            curl_setopt($ch, \CURLOPT_WRITEFUNCTION, static function ($ch, string $data) use ($multi, $id): int {
+                $multi->handlesActivity[$id][] = $data;
+
+                return \strlen($data);
+            });
+
             $multi->handlesActivity[$id][] = $data;
 
             return \strlen($data);
diff --git a/src/Symfony/Component/HttpClient/Response/ResponseTrait.php b/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
index 462ed16c89e77..392834373273f 100644
--- a/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
+++ b/src/Symfony/Component/HttpClient/Response/ResponseTrait.php
@@ -270,7 +270,7 @@ private static function addResponseHeaders(array $responseHeaders, array &$info,
         $debug .= "< \r\n";
 
         if (!$info['http_code']) {
-            throw new TransportException('Invalid or missing HTTP status line.');
+            throw new TransportException(sprintf('Invalid or missing HTTP status line for "%s".', implode('', $info['url'])));
         }
     }
 
@@ -350,7 +350,7 @@ public static function stream(iterable $responses, float $timeout = null): \Gene
 
                         if (\is_string($chunk = array_shift($multi->handlesActivity[$j]))) {
                             if (null !== $response->inflate && false === $chunk = @inflate_add($response->inflate, $chunk)) {
-                                $multi->handlesActivity[$j] = [null, new TransportException('Error while processing content unencoding.')];
+                                $multi->handlesActivity[$j] = [null, new TransportException(sprintf('Error while processing content unencoding for "%s".', $response->getInfo('url')))];
                                 continue;
                             }