你可以使用3种主要工具:
- ts-protoc-gen
- @grpc/proto-loader
- grpc_tools_node_protoc_ts
我建议使用proto-loader:
npm i @grpc/proto-loader
你可以这样生成类型:
./node_modules/.bin/proto-loader-gen-types --longs=String --enums=String --defaults --oneofs --grpcLib=@grpc/grpc-js --outDir=proto/ proto/*.proto
这是我在本例中使用的协议文件:
syntax = "proto3";
package example_package;
message ServerMessage {
string server_message = 1;
}
message ClientMessage {
string client_message = 1;
}
service Example {
rpc unaryCall(ClientMessage) returns (ServerMessage) {}
rpc serverStreamingCall(ClientMessage) returns (stream ServerMessage) {}
rpc clientStreamingCall(stream ClientMessage) returns (ServerMessage) {}
rpc bidirectionalStreamingCall(stream ClientMessage) returns (stream ServerMessage) {}
}
一旦类型生成,您可以这样使用它们:
import * as grpc from '@grpc/grpc-js';
import * as protoLoader from '@grpc/proto-loader';
import { ProtoGrpcType } from './proto/example';
import { ClientMessage } from './proto/example_package/ClientMessage';
import { ExampleHandlers } from './proto/example_package/Example';
import { ServerMessage } from './proto/example_package/ServerMessage';
const host = '0.0.0.0:9090';
const exampleServer: ExampleHandlers = {
unaryCall(
call: grpc.ServerUnaryCall<ClientMessage, ServerMessage>,
callback: grpc.sendUnaryData<ServerMessage>
) {
if (call.request) {
console.log(`(server) Got client message: ${call.request.clientMessage}`);
}
callback(null, {
serverMessage: 'Message from server',
});
},
serverStreamingCall(
call: grpc.ServerWritableStream<ClientMessage, ServerMessage>
) {
call.write({
serverMessage: 'Message from server',
});
},
clientStreamingCall(
call: grpc.ServerReadableStream<ClientMessage, ServerMessage>
) {
call.on('data', (clientMessage: ClientMessage) => {
console.log(
`(server) Got client message: ${clientMessage.clientMessage}`
);
});
},
bidirectionalStreamingCall(
call: grpc.ServerDuplexStream<ClientMessage, ServerMessage>
) {
call.write({
serverMessage: 'Message from server',
});
call.on('data', (clientMessage: ClientMessage) => {
console.log(
`(server) Got client message: ${clientMessage.clientMessage}`
);
});
},
};
function getServer(): grpc.Server {
const packageDefinition = protoLoader.loadSync('./proto/example.proto');
const proto = (grpc.loadPackageDefinition(
packageDefinition
) as unknown) as ProtoGrpcType;
const server = new grpc.Server();
server.addService(proto.example_package.Example.service, exampleServer);
return server;
}
if (require.main === module) {
const server = getServer();
server.bindAsync(
host,
grpc.ServerCredentials.createInsecure(),
(err: Error | null, port: number) => {
if (err) {
console.error(`Server error: ${err.message}`);
} else {
console.log(`Server bound on port: ${port}`);
server.start();
}
}
);
}
我在这里创建了各种如何使用TypeScript进行gRPC的示例:https://github.com/badsyntax/grpc-js-types
client.unaryCall
,但目前正在使用的是makeUnaryRequest。您能否为我们提供相应的示例?谢谢! - Simon Soka