我尝试执行gRPC服务的HTTP/1.x请求，但出现以下错误。

io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2Exception: Unexpected HTTP/1.x request: GET /author/1 
    at io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2Exception.connectionError(Http2Exception.java:109) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.readClientPrefaceString(Http2ConnectionHandler.java:317) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2ConnectionHandler$PrefaceDecoder.decode(Http2ConnectionHandler.java:247) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:453) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:510) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:449) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:279) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:357) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:379) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:365) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:166) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:722) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:658) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:584) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:496) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at io.grpc.netty.shaded.io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[grpc-netty-shaded-1.51.0.jar:1.51.0]
    at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na]

我的.proto文件如下。

syntax = "proto3";
package com.myapp.grpc_server.proto;

option java_multiple_files = true;

import "google/api/annotations.proto";

message Book {
  int32 book_id = 1;
  string title = 2;
  float book_price = 3;
  int32 pages = 4;
  int32 author_id = 5;
}

message Author {
  int32 author_id = 1;
  string first_name = 2;
  string last_name = 3;
  string gender = 4;
  int32 book_id = 5;
}

service BookAuthorService {
  //unary - synchronous - client will send one request and one response will be received.
  rpc getAuthor(Author) returns (Author) {
    option (google.api.http) = {
      get: "/author/{id}"
    };
  }
}

My proto directory containing my .proto file along with annotations.proto and http.proto files copied from googleapis github.com/googleapis/googleapis

generated sources after compiling

GrpcService类

package com.myapp.grpcserver.service;

import com.myapp.grpc_server.proto.Author;
import com.myapp.grpc_server.proto.Book;
import com.myapp.grpc_server.proto.BookAuthorServiceGrpc;
import com.myapp.grpcserver.setup.TempDB;
import io.grpc.stub.StreamObserver;
import net.devh.boot.grpc.server.service.GrpcService;

@GrpcService
public class BookAuthorService extends BookAuthorServiceGrpc.BookAuthorServiceImplBase {

    @Override
    public void getAuthor(Author request, StreamObserver<Author> responseObserver) {
        TempDB.authors.stream()
                .filter(author -> author.getAuthorId() == request.getAuthorId())
                .findFirst()
                .ifPresent(responseObserver::onNext);
        responseObserver.onCompleted();
    }
}

我在定义的端点上使用浏览器发出GET请求，但出现了上述错误。请建议我错在哪里以及我需要做什么。请分享任何Java中的工作示例，因为grpc-gateway的官方文档在Go中。