Possible solution for https://phabricator.wikimedia.org/T286542 from 567bc5a9359923b06470c483bfa116ac213d1066 in https://gerrit.wikimedia.org/r/mediawiki/core

stream.patch

diff --git a/includes/http/GuzzleHttpRequest.php b/includes/http/GuzzleHttpRequest.php
index 74edf8e861..3936aae52a 100644
--- a/includes/http/GuzzleHttpRequest.php
+++ b/includes/http/GuzzleHttpRequest.php
@@ -42,6 +42,7 @@ use Psr\Http\Message\RequestInterface;
 class GuzzleHttpRequest extends MWHttpRequest {
        public const SUPPORTS_FILE_POSTS = true;
 
+       protected $stream = null;
        protected $handler = null;
        protected $sink = null;
        /** @var array */
@@ -67,6 +68,9 @@ class GuzzleHttpRequest extends MWHttpRequest {
                if ( isset( $options['sink'] ) ) {
                        $this->sink = $options['sink'];
                }
+               if ( isset( $options['stream'] ) ) {
+                       $this->stream = $options['stream'];
+               }
        }
 
        /**
@@ -126,7 +130,12 @@ class GuzzleHttpRequest extends MWHttpRequest {
                if ( $this->proxy ) {
                        $this->guzzleOptions['proxy'] = $this->proxy;
                }
-
+               if ( $this->stream ) {
+                       $this->guzzleOptions['stream'] = $this->stream;
+                       if ( $this->timeout === 'default' ) {
+                               $this->timeout = null;
+                       }
+               }
                $this->guzzleOptions['timeout'] = $this->timeout;
                $this->guzzleOptions['connect_timeout'] = $this->connectTimeout;
                $this->guzzleOptions['version'] = '1.1';
diff --git a/includes/http/HttpRequestFactory.php b/includes/http/HttpRequestFactory.php
index 2b55db8431..b7ffac00ac 100644
--- a/includes/http/HttpRequestFactory.php
+++ b/includes/http/HttpRequestFactory.php
@@ -87,6 +87,7 @@ class HttpRequestFactory {
         *    - password            Password for HTTP Basic Authentication
         *    - originalRequest     Information about the original request (as a WebRequest object or
         *                          an associative array with 'ip' and 'userAgent').
+        *    - stream              Stream the response and don't wait for the end of the body.
         * @phpcs:ignore Generic.Files.LineLength
         * @phan-param array{timeout?:int|string,connectTimeout?:int|string,postData?:string|array,proxy?:?string,noProxy?:bool,sslVerifyHost?:bool,sslVerifyCert?:bool,caInfo?:?string,maxRedirects?:int,followRedirects?:bool,userAgent?:string,method?:string,logger?:\Psr\Log\LoggerInterface,username?:string,password?:string,originalRequest?:\WebRequest|array{ip:string,userAgent:string}} $options
         * @param string $caller The method making this request, for profiling
@@ -102,18 +103,20 @@ class HttpRequestFactory {
                if ( !isset( $options['logger'] ) ) {
                        $options['logger'] = $this->logger;
                }
-               $options['timeout'] = $this->normalizeTimeout(
-                       $options['timeout'] ?? null,
-                       $options['maxTimeout'] ?? null,
-                       $this->options->get( 'HTTPTimeout' ),
-                       $this->options->get( 'HTTPMaxTimeout' )
-               );
-               $options['connectTimeout'] = $this->normalizeTimeout(
-                       $options['connectTimeout'] ?? null,
-                       $options['maxConnectTimeout'] ?? null,
-                       $this->options->get( 'HTTPConnectTimeout' ),
-                       $this->options->get( 'HTTPMaxConnectTimeout' )
-               );
+               if ( !isset($options['stream']) || $options['stream'] !== true ){
+                       $options['timeout'] = $this->normalizeTimeout(
+                               $options['timeout'] ?? null,
+                               $options['maxTimeout'] ?? null,
+                               $this->options->get( 'HTTPTimeout' ),
+                               $this->options->get( 'HTTPMaxTimeout' )
+                       );
+                       $options['connectTimeout'] = $this->normalizeTimeout(
+                               $options['connectTimeout'] ?? null,
+                               $options['maxConnectTimeout'] ?? null,
+                               $this->options->get( 'HTTPConnectTimeout' ),
+                               $this->options->get( 'HTTPMaxConnectTimeout' )
+                       );
+               }
 
                switch ( Http::$httpEngine ) {
                        case 'guzzle':
diff --git a/includes/http/MWHttpRequest.php b/includes/http/MWHttpRequest.php
index e365658b17..cc523263b8 100644
--- a/includes/http/MWHttpRequest.php
+++ b/includes/http/MWHttpRequest.php
@@ -111,7 +111,7 @@ abstract class MWHttpRequest implements LoggerAwareInterface {
 
                if ( isset( $options['timeout'] ) && $options['timeout'] != 'default' ) {
                        $this->timeout = $options['timeout'];
-               } else {
+               } elseif ( !isset($options['stream']) || $options['stream'] !== true ) {
                        // The timeout should always be set by HttpRequestFactory, so this
                        // should only happen if the class was directly constructed
                        wfDeprecated( __METHOD__ . ' without the timeout option', '1.35' );
@@ -120,7 +120,7 @@ abstract class MWHttpRequest implements LoggerAwareInterface {
                }
                if ( isset( $options['connectTimeout'] ) && $options['connectTimeout'] != 'default' ) {
                        $this->connectTimeout = $options['connectTimeout'];
-               } else {
+               } elseif ( !isset($options['stream']) || $options['stream'] !== true ) {
                        // The timeout should always be set by HttpRequestFactory, so this
                        // should only happen if the class was directly constructed
                        wfDeprecated( __METHOD__ . ' without the connectTimeout option', '1.35' );