grpc-node/packages/grpc-js-xds/test/backend.ts

154 lines
4.7 KiB
TypeScript

/*
* Copyright 2023 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
import { loadPackageDefinition, sendUnaryData, Server, ServerCredentials, ServerOptions, ServerUnaryCall, UntypedServiceImplementation } from "@grpc/grpc-js";
import { loadSync } from "@grpc/proto-loader";
import { ProtoGrpcType } from "./generated/echo";
import { EchoRequest__Output } from "./generated/grpc/testing/EchoRequest";
import { EchoResponse } from "./generated/grpc/testing/EchoResponse";
import * as net from 'net';
import { XdsServer } from "../src";
import { ControlPlaneServer } from "./xds-server";
import { findFreePorts } from 'find-free-ports';
import { XdsServerCredentials } from "../src/xds-credentials";
const loadedProtos = loadPackageDefinition(loadSync(
[
'grpc/testing/echo.proto'
],
{
keepCase: true,
longs: String,
enums: String,
defaults: true,
oneofs: true,
json: true,
includeDirs: [
// Paths are relative to build/test
__dirname + '/../../proto/'
],
})) as unknown as ProtoGrpcType;
const BOOTSTRAP_CONFIG_KEY = 'grpc.TEST_ONLY_DO_NOT_USE_IN_PROD.xds_bootstrap_config';
export class Backend {
private server: Server | null = null;
private receivedCallCount = 0;
private callListeners: (() => void)[] = [];
constructor(private port: number, private useXdsServer: boolean, private creds?: ServerCredentials | undefined, private serverOptions?: ServerOptions) {
}
Echo(call: ServerUnaryCall<EchoRequest__Output, EchoResponse>, callback: sendUnaryData<EchoResponse>) {
// call.request.params is currently ignored
this.addCall();
for (const behaviorEntry of call.metadata.get('rpc-behavior')) {
if (typeof behaviorEntry !== 'string') {
continue;
}
for (const behavior of behaviorEntry.split(',')) {
if (behavior.startsWith('error-code-')) {
const errorCode = Number(behavior.substring('error-code-'.length));
callback({code: errorCode, details: 'rpc-behavior error code'});
return;
}
}
}
callback(null, {message: call.request.message});
}
addCall() {
this.receivedCallCount++;
this.callListeners.forEach(listener => listener());
}
onCall(listener: () => void) {
this.callListeners.push(listener);
}
start(controlPlaneServer: ControlPlaneServer, callback: (error: Error | null, port: number) => void) {
if (this.server) {
throw new Error("Backend already running");
}
if (this.useXdsServer) {
this.server = new XdsServer({...this.serverOptions, [BOOTSTRAP_CONFIG_KEY]: controlPlaneServer.getBootstrapInfoString()});
} else {
this.server = new Server();
}
const server = this.server;
server.addService(loadedProtos.grpc.testing.EchoTestService.service, this as unknown as UntypedServiceImplementation);
const credentials = this.creds ?? ServerCredentials.createInsecure();
server.bindAsync(`[::1]:${this.port}`, credentials, (error, port) => {
if (!error) {
this.port = port;
}
callback(error, port);
});
}
startAsync(controlPlaneServer: ControlPlaneServer): Promise<number> {
return new Promise((resolve, reject) => {
this.start(controlPlaneServer, (error, port) => {
if (error) {
reject(error);
} else {
resolve(port);
}
});
});
}
getPort(): number {
return this.port;
}
getCallCount() {
return this.receivedCallCount;
}
resetCallCount() {
this.receivedCallCount = 0;
}
shutdown(callback: (error?: Error) => void) {
if (this.server) {
this.server.tryShutdown(error => {
this.server = null;
callback(error);
});
} else {
process.nextTick(callback);
}
}
shutdownAsync(): Promise<void> {
return new Promise((resolve, reject) => {
this.shutdown(error => {
if (error) {
reject(error);
} else {
resolve();
}
});
});
}
}
export async function createBackends(count: number, useXdsServer?: boolean, creds?: ServerCredentials | undefined, serverOptions?: ServerOptions): Promise<Backend[]> {
const ports = await findFreePorts(count);
return ports.map(port => new Backend(port, useXdsServer ?? true, creds, serverOptions));
}