[I] help request: Is it possible for grpc-transcode plugin to handle grpc stream? [apisix]

[via GitHub]

BustDot opened a new issue, #12319:
URL: https://github.com/apache/apisix/issues/12319

   ### Description
   
   Currently I want to send http request to apisix and keep the client 
receiving update in http format from grpc server, which can achieve SSE-like 
function. Is it possible for grpc-transcode plugin to handle grpc stream? e.g.:
   ```
   syntax = "proto3";
   
   package helloworld;
   option go_package = "./proto";
   
   service Greeter {
     // Unary RPC.
     rpc SayHello (HelloRequest) returns (HelloReply) {}
     rpc GetErrResp (HelloRequest) returns (HelloReply) {}
     rpc Plus (PlusRequest) returns (PlusReply) {}
     rpc SayHelloAfterDelay (HelloRequest) returns (HelloReply) {}
   
     // Server side streaming.
     rpc SayHelloServerStream (HelloRequest) returns (stream HelloReply) {}
   
     // Client side streaming.
     rpc SayHelloClientStream (stream HelloRequest) returns (HelloReply) {}
   
     // Bidirectional streaming.
     rpc SayHelloBidirectionalStream (stream HelloRequest) returns (stream 
HelloReply) {}
   }
   
   enum Gender {
       GENDER_UNKNOWN = 0;
       GENDER_MALE = 1;
       GENDER_FEMALE = 2;
   }
   
   message Person {
       string name = 1;
       int32 age = 2;
   }
   
   message HelloRequest {
     string name = 1;
     repeated string items = 2;
     Gender gender = 3;
     Person person = 4;
   }
   
   message HelloReply {
     string message = 1;
     repeated string items = 2;
     Gender gender = 3;
   }
   
   message PlusRequest {
     int64 a = 1;
     int64 b = 2;
   }
   
   message PlusReply {
     int64 result = 1;
   }
   
   message ErrorDetail {
     int64 code = 1;
     string message = 2;
     string type = 3;
   }
   ```
   This is the example proto file from 
https://github.com/api7/grpc_server_example/blob/master/proto/helloworld.proto. 
How to configure APISIX to make it handle the SayHelloServerStream rpc?
   
   ### Environment
   
   - APISIX version (run `apisix version`): 3.12.0
   - Operating system (run `uname -a`):
   - OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
   - 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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