From 76ca6147ec563749ec626586c5409f72b2d4493c Mon Sep 17 00:00:00 2001
From: Your Name <aa@bb.com>
Date: Sat, 15 Aug 2026 14:25:59 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D{hi}=E6=8F=A1=E6=89=8B?=
 =?UTF-8?q?=E6=8B=92=E7=BB=9D=E6=9C=AA=E6=90=BA=E5=B8=A6tenant=E5=AD=97?=
 =?UTF-8?q?=E6=AE=B5=E7=9A=84=E5=AE=A2=E6=88=B7=E7=AB=AF?=
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多租户改造给{hi}握手消息加了必填的tenant字段，但目前的im_webapp(以及
现有iOS/Android客户端)都是标准Tinode SDK，不知道要发这个新字段，导致
每次连接握手都被判定为malformed(400)，前端表现为反复断线重连。

改为tenant为空时回退到默认租户"default"(对应迁移脚本里seed的那条记录)，
不再直接拒绝；显式携带tenant code的客户端行为不受影响，仅长度校验保留。
---
 server/session.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/server/session.go b/server/session.go
index be601f8..a644a83 100644
--- a/server/session.go
+++ b/server/session.go
@@ -801,9 +801,15 @@ func (s *Session) hello(msg *ClientComMessage) {
 		}
 
 		tenantCode := strings.TrimSpace(msg.Hi.Tenant)
-		if tenantCode == "" || len(tenantCode) > 64 {
+		if tenantCode == "" {
+			// Clients that predate the tenant-aware protocol (stock Tinode
+			// webapp/mobile SDKs never send this field) fall back to the
+			// default tenant rather than being rejected. Clients that do
+			// send an explicit code are unaffected.
+			tenantCode = "default"
+		} else if len(tenantCode) > 64 {
 			s.queueOut(ErrMalformed(msg.Id, "", msg.Timestamp))
-			logs.Warn.Println("s.hello: tenant code is missing or invalid", s.sid)
+			logs.Warn.Println("s.hello: tenant code is invalid", s.sid)
 			return
 		}
 		if store.Tenants == nil {