使用模式拼接的Graphql Yoga传递标头

Question

我试图通过jq-yoga api网关将jwt传递给其他graphql-yoga微服务。我似乎无法使其正常工作，并且我能找到的所有帖子都直接使用了apollo服务器。当我运行以下graphqlContext是未定义的。

async function createRemoteSchema(uri: string) {
    const ContextLink = setContext((_, previousContext) => ({
        headers: {
            authorization: previousContext.graphqlContext.headers.authorization,
        },
    }));
    const link = ApolloLink.from([ContextLink, new HttpLink({ uri, fetch })]);
    const schema = await introspectSchema(link);

    const executableSchema = makeRemoteExecutableSchema({
        schema,
        link,
    });

    return executableSchema;
}


const remoteSchemas = await Promise.all(['http://localhost:8080','http://localhost:8081'].map(createRemoteSchema));

const schema = mergeSchemas({
    schemas: [
        ...remoteSchemas,
        makeExecutableSchema({
            typeDefs,
            resolvers
        }),
    ],

});


const graphql = new GraphQLServer({
    schema,
    context: ({ request }) => ({
        headers: request ? request.headers : null
    })
});