From 1d8f1fe0772736dd71219d244783c9d671dd7223 Mon Sep 17 00:00:00 2001
From: Mark Felder <feld@feld.me>
Date: Fri, 5 Feb 2021 13:32:21 -0600
Subject: [PATCH] Add a default rule to not attempt to cache any files larger
 than 50MB

This fixes connection failures when trying to retrieve large files.
It is less common in typical Pleroma usage, but it's possible to encounter
this on a cloud instance with lower memory.
---
 installation/pleroma.vcl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/installation/pleroma.vcl b/installation/pleroma.vcl
index 13dad784c..4752510ea 100644
--- a/installation/pleroma.vcl
+++ b/installation/pleroma.vcl
@@ -59,6 +59,13 @@ sub vcl_backend_response {
       set beresp.http.CR = beresp.http.content-range;
     }
 
+    # Bypass cache for large files
+    # 50000000 ~ 50MB
+    if (std.integer(beresp.http.content-length, 0) > 50000000) {
+       set beresp.uncacheable = true;
+       return(deliver);
+    }
+
     # Don't cache objects that require authentication
     if (beresp.http.Authorization && !beresp.http.Cache-Control ~ "public") {
       set beresp.uncacheable = true;