阿波罗网关:转发子图' set-cookie '报头到网关到客户端

Question

我有一个处理会话的子图微服务。我们通过子图创建的cookie存储会话，并通过set-cookie头设置会话。唯一的问题是我的网关似乎没有将set-cookie头从子图转发到客户端。

这是我的网关的代码

const { ApolloServer } = require('apollo-server');
const { ApolloGateway, RemoteGraphQLDataSource } = require('@apollo/gateway');
const { readFileSync } = require('fs');

const supergraphSdl = readFileSync('./gateway/supergraph.graphql').toString();

class CookieDataSource extends RemoteGraphQLDataSource {
didReceiveResponse({ response, request, context }) {
const cookie = response.http.headers.get('set-cookie');
console.log("Cookie:", cookie)
return response;
}
}

const gateway = new ApolloGateway({
supergraphSdl,
buildService({url}) {
return new CookieDataSource({url});
}
});

const server = new ApolloServer({
gateway,
cors: {
origin: ["http://localhost:3000", "https://studio.apollographql.com"],
credentials: true
},
csrfPrevention: true,
});

server.listen().then(({ url }) => {
console.log(`🚀 Gateway ready at ${url}`);
}).catch(err => {console.error(err)});

版本信息"@apollo/网关":"^ 2.1.2",:"apollo-server ^ 3.10.2",

我可以确认子图正在发回一个set-cookie报头，但是，它没有被传递到客户端。

谢谢!

Answer 1

我最终通过创建添加上下文值的网关数据源来解决这个问题。然后，将子图上下文值的报头传递给响应报头。

import { GatewayGraphQLResponse, GatewayGraphQLRequestContext } from '@apollo/server-gateway-interface';
import { RemoteGraphQLDataSource } from '@apollo/gateway';
import { ApolloServerPlugin, GraphQLRequestContext, GraphQLRequestListener } from '@apollo/server';
interface ServerContext {
passthrough_cookies?: string
}
export class CookieProcessorDataSource extends RemoteGraphQLDataSource {
didReceiveResponse({response, context}: Required<Pick<GatewayGraphQLRequestContext<Record<string, any>>, 'request' | 'response' | 'context'>>): GatewayGraphQLResponse | Promise<GatewayGraphQLResponse> {
context.passthrough_cookies = response.http?.headers.get('set-cookie');
return response;
}
}

export class CookieServerListener implements GraphQLRequestListener<ServerContext> {
public willSendResponse({contextValue, response}: GraphQLRequestContext<ServerContext>): Promise<void> {
if (contextValue.passthrough_cookies !== undefined) {
response.http.headers.set('set-cookie', contextValue.passthrough_cookies);
}
return Promise.resolve()
}
}
export class CookieServerPlugin implements ApolloServerPlugin<ServerContext> {
async requestDidStart() {
return new CookieServerListener();
}
}