From f321d6a4de0e32068d31c1605c5a93efe6568b0b Mon Sep 17 00:00:00 2001
From: Zak Henry <zak@cloudnc.com>
Date: Fri, 23 Aug 2024 18:37:18 +1200
Subject: [PATCH] fix(web): fix empty trailer parsing causing infinite parser
 loop (#1883)

---
 tonic-web/src/call.rs | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tonic-web/src/call.rs b/tonic-web/src/call.rs
index 2bdcdc60c..4b66e44f0 100644
--- a/tonic-web/src/call.rs
+++ b/tonic-web/src/call.rs
@@ -304,9 +304,10 @@ where
                         }
                     }
                     FindTrailers::IncompleteBuf => continue,
-                    FindTrailers::Done(len) => {
-                        Poll::Ready(Some(Ok(Frame::data(buf.split_to(len).freeze()))))
-                    }
+                    FindTrailers::Done(len) => Poll::Ready(match len {
+                        0 => None,
+                        _ => Some(Ok(Frame::data(buf.split_to(len).freeze()))),
+                    }),
                 };
             }
         }