From 16719ec28f775d8b9ef447c988409d41107fe74f Mon Sep 17 00:00:00 2001
From: Daniil Gentili <daniil@daniil.it>
Date: Fri, 11 Sep 2020 09:30:08 +0200
Subject: [PATCH] Check output buffering level

---
 .devcontainer/devcontainer.json                | 6 ++++--
 src/danog/MadelineProto/MTProtoTools/Files.php | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 862e037b..18f45011 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -4,7 +4,7 @@
 		"dockerfile": "Dockerfile",
 		"args": { 
 			// Update VARIANT to pick a PHP version: 7, 7.4, 7.3
-			"VARIANT": "7",
+			"VARIANT": "7.4",
 			"INSTALL_NODE": "true",
 			"NODE_VERSION": "lts/*"
 		}
@@ -18,7 +18,9 @@
 	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
 		"felixfbecker.php-debug",
-		"felixfbecker.php-intellisense"
+		"felixfbecker.php-intellisense",
+                "getpsalm.psalm-vscode-plugin",
+                "junstyle.php-cs-fixer"
 	]
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
diff --git a/src/danog/MadelineProto/MTProtoTools/Files.php b/src/danog/MadelineProto/MTProtoTools/Files.php
index 41c91417..fd176839 100644
--- a/src/danog/MadelineProto/MTProtoTools/Files.php
+++ b/src/danog/MadelineProto/MTProtoTools/Files.php
@@ -946,8 +946,10 @@ trait Files
         if (!\in_array($result->getCode(), [Status::OK, Status::PARTIAL_CONTENT])) {
             yield Tools::echo($result->getCodeExplanation());
         } elseif ($result->shouldServe()) {
-            \ob_end_flush();
-            \ob_implicit_flush();
+            if (\ob_get_level()) {
+                \ob_end_flush();
+                \ob_implicit_flush();
+            }
             yield from $this->downloadToStream($messageMedia, \fopen('php://output', 'w'), $cb, ...$result->getServeRange());
         }
     }