RogueJin opened a new issue, #10254:
URL: https://github.com/apache/apisix/issues/10254

   ### Current Behavior
   
   The response from grpc server has a trailing header but APISIX grpcweb 
plugin truncates it and causes client error.
   
   
![WeChatWorkScreenshot_5b0438bc-c91a-43d9-be01-ec214bad4fd3](https://github.com/apache/apisix/assets/21214103/7f16a335-326b-4035-94e3-6b40e304c3e7)
   
   
![WeChatWorkScreenshot_862b930d-6e49-4acc-869f-de6de27ebbef](https://github.com/apache/apisix/assets/21214103/98048e5e-6fc1-41b7-aadd-a2d6a3b3863b)
   
   
   The related code of grpc-dotnet could be checked here:
   
[https://github.com/grpc/grpc-dotnet/blob/46480fca2fccddb3391cf267004f281afe87571d/src/Grpc.Net.Client/Internal/GrpcProtocolHelpers.cs#L386](url)
   
![WeChatWorkScreenshot_543b9c2f-e7ad-496e-a179-5c7dd0bf2e00](https://github.com/apache/apisix/assets/21214103/a7ea9f00-2ef9-4247-b810-0f6524b98fef)
   
   
   ### Expected Behavior
   
   Trailing headers could be reserved for client.
   
   ### Error Logs
   
   _No response_
   
   ### Steps to Reproduce
   
   1. run APISIX via docker compose
   2. setup upstream grpcweb api
   3. config route
   ``` json
   {
     "uri": "/*",
     "name": "grpcweb",
     "plugins": {
       "cors": {},
       "grpc-web": {}
     },
     "upstream_id": "479432631159620291",
     "status": 1
   }
   ```
   5. curl
   ``` bash
   curl http://localhost:9080/xxxxxxxxx -X OPTIONS -v
   ```
   
   ### Environment
   
   - APISIX version (run `apisix version`): 3.5.0
   - Operating system (run `uname -a`):
   
   Linux 49c5eb4d90cd 5.15.49-linuxkit-pr 
https://github.com/apache/apisix/pull/1 SMP PREEMPT Thu May 25 07:27:39 UTC 
2023 aarch64 GNU/Linux
   
   - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
   nginx version: openresty/1.21.4.1
   built by gcc 10.2.1 20210110 (Debian 10.2.1-6)
   built with OpenSSL 1.1.1s 1 Nov 2022
   TLS SNI support enabled
   
   - etcd version, if relevant (run `curl 
http://127.0.0.1:9090/v1/server_info`):
   - APISIX Dashboard version, if relevant:
   - Plugin runner version, for issues related to plugin runners:
   - LuaRocks version, for installation issues (run `luarocks --version`):
   


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