cookiesnestjsmicroservicesapollo-federationapollo-gateway

Set-cookie headers are not being sent when calls are made through apollo federation gateway NestJs


I have a non monorepo nestJs graphql microservices app, and opted for Apollo federation gateway. I have an authentication server which works fine and sets cookies to header, only problem is when calls are made through apollo gateway set-cookie headers are not being set, and request headers cookies are not passed to microservices.

this is my gatewayModule

@Module({
  imports: [
    GraphQLModule.forRoot<ApolloGatewayDriverConfig>({
      driver: ApolloGatewayDriver,
      gateway: {
        supergraphSdl: new IntrospectAndCompose({
          subgraphs: [
            {
              name: 'users',
              url: 'http://localhost:9999/graphql',
            },
            {
              name: 'posts',
              url: 'http://localhost:9119/graphql',
            },
            {
              name: 'comments',
              url: 'http://localhost:9229/graphql',
            },
          ],
        }),
      },
    }),
  ],
}) 

Solution

  • I have found a solution, add the following class and import it to app.module

    // graphql-data-source.ts
    import {
      GraphQLDataSourceProcessOptions,
      RemoteGraphQLDataSource,
    } from '@apollo/gateway';
    import { GraphQLDataSourceRequestKind } from '@apollo/gateway/dist/datasources/types';
    
    export class GraphQLDataSource extends RemoteGraphQLDataSource {
      didReceiveResponse({ response, context }): typeof response {
        const cookies = response.http.headers?.raw()['set-cookie'] as
          | string[]
          | null;
    
        if (cookies) {
          context?.req.res.append('set-cookie', cookies);
        }
    
        return response;
      }
    
      willSendRequest(params: GraphQLDataSourceProcessOptions) {
        const { request, kind } = params;
    
        if (kind === GraphQLDataSourceRequestKind.INCOMING_OPERATION) {
          const cookie =
            params?.incomingRequestContext.request.http.headers.get('Cookie');
          request.http.headers.set('Cookie', cookie);
        }
      }
    }
    
    
    

    then edit app.module

    ....
     GraphQLModule.forRoot<ApolloGatewayDriverConfig>({
          driver: ApolloGatewayDriver,
          gateway: {
            buildService: (args) => new GraphQLDataSource(args),
            supergraphSdl: new IntrospectAndCompose({
              subgraphs: [
    ....