syntax = "proto3";

package http.responsewriter;

import "google/protobuf/empty.proto";

option go_package = "github.com/ava-labs/avalanchego/proto/pb/http/responsewriter";

// Writer is an http.ResponseWriter see: https://pkg.go.dev/net/http#ResponseWriter
service Writer {
  // Write writes the data to the connection as part of an HTTP reply
  rpc Write(WriteRequest) returns (WriteResponse);
  // WriteHeader sends an HTTP response header with the provided
  // status code
  rpc WriteHeader(WriteHeaderRequest) returns (google.protobuf.Empty);
  // Flush is a no-op
  rpc Flush(google.protobuf.Empty) returns (google.protobuf.Empty);
  // Hijack lets the caller take over the connection
  rpc Hijack(google.protobuf.Empty) returns (HijackResponse);
}

message Header {
  // key is a element key in a key value pair
  string key = 1;
  // values are a list of strings coresponding to the key
  repeated string values = 2;
}

message WriteRequest {
  // headers represents the key-value pairs in an HTTP header
  repeated Header headers = 1;
  // payload is the write request in bytes
  bytes payload = 2;
}

message WriteResponse {
  // written is the number of bytes written in body
  int32 written = 1;
}

message WriteHeaderRequest {
  // headers represents the key-value pairs in an HTTP header
  repeated Header headers = 1;
  // status_code must be a valid HTTP 1xx-5xx status code
  int32 status_code = 2;
}

message HijackResponse {
  // local_network is the name of the network (for example, "tcp", "udp")
  string local_network = 1;
  // local_string is string form of address
  string local_string = 2;
  // remote_network is the name of the network (for example, "tcp", "udp")
  string remote_network = 3;
  // remote_string is string form of address
  string remote_string = 4;
  // server_addr is the address of the gRPC server serving the Conn, Reader
  // and Writer services which facilitate Hijacking
  string server_addr = 5;
}