我遵循[相同的文档代码][1]使用WebSocket graphql创建订阅服务器，把它不与graphql-ws和ws一起工作当我删除serverql定义时，代码工作，它也适用于旧的订阅库“subscription-transfer-ws”my index.js
const { ApolloServer } = require('apollo-server-express')
const { ApolloServerPluginDrainHttpServer } = require('apollo-server-core')
const express = require('express')
const http = require('http')
const { makeExecutableSchema } = require('@graphql-tools/schema')
const { upperDirectiveTransformer } = require('./directives/uppercase')
const { WebSocketServer } = require ('ws');
const { useServer } = require('graphql-ws/lib/use/ws');
const { typeDefs } = require('./typeDefs')
const { resolvers } = require('./resolvers')
const jwt = require('jsonwebtoken');
const JWT_SECRET = 'f1BtnWgD3VKY';
const users = [
{
"id":1,
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1,
"isGraduated":true,
"friends":[
{
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1
},
{
"name":"Harman",
"email":"[email protected]",
"gender":"male",
"mobile":"158-265-8979",
"cumulativeGPA":87.9
},
{
"name":"Oliver",
"email":"[email protected]",
"gender":"female",
"mobile":"500-958-5193",
"cumulativeGPA":67.9
}
],
"age":28,
"image" : {"name":"ghklk.png", "height": 50 , "width":30},
"idea": "auction",
"grantedAmount": 12000
},
{
"id":2,
"name":"Lyndell",
"email":"[email protected]",
"gender":"male",
"mobile":"165-705-3521",
"cumulativeGPA":90.6,
"isGraduated":false,
"friends":[
{
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1
},
{
"name":"Harman",
"email":"[email protected]",
"gender":"male",
"mobile":"158-265-8979",
"cumulativeGPA":87.9
},
{
"name":"Oliver",
"email":"[email protected]",
"gender":"female",
"mobile":"500-958-5193",
"cumulativeGPA":67.9
}
],
"age":23,
"image" : {"name":"ghklk.png", "height": 50, "width":30},
"idea": "e-collage",
"grantedAmount": 0
},
]
async function startApolloServer(typeDefs, resolvers) {
const app = express()
const httpServer = http.createServer(app)
let schema = makeExecutableSchema({
typeDefs,
resolvers
})
schema = upperDirectiveTransformer(schema, 'upper')
const wsServer = new WebSocketServer({
server: httpServer,
path: '/graphql'
})
const serverCleanup = useServer({ schema }, wsServer);
const server = new ApolloServer({
schema,
plugins: [
ApolloServerPluginDrainHttpServer({ httpServer }),
{
async serverWillStart() {
return {
async drainServer() {
serverCleanup.dispose();
}
}
}
}
],
context: ({ req }) => {
const auth = req ? req.headers.authorization : null
try{
const decodedToken = jwt.verify(auth.slice(4), JWT_SECRET)
const user = users.find(user => user.id == decodedToken.id)
return { user }
}catch(err){
return null
}
}
})
await server.start()
server.applyMiddleware({ app })
await new Promise(resolve => httpServer.listen({ port: 4000 }, resolve))
console.log(`🚀 Server ready at http://localhost:4000${server.graphqlPath}`);
return { server, app }
}
startApolloServer(typeDefs, resolvers)字符串
我的解析器.js
const users = [
{
"id":1,
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1,
"isGraduated":true,
"friends":[
{
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1
},
{
"name":"Harman",
"email":"[email protected]",
"gender":"male",
"mobile":"158-265-8979",
"cumulativeGPA":87.9
},
{
"name":"Oliver",
"email":"[email protected]",
"gender":"female",
"mobile":"500-958-5193",
"cumulativeGPA":67.9
}
],
"age":28,
"image" : {"name":"ghklk.png", "height": 50 , "width":30},
"idea": "auction",
"grantedAmount": 12000
},
{
"id":2,
"name":"Lyndell",
"email":"[email protected]",
"gender":"male",
"mobile":"165-705-3521",
"cumulativeGPA":90.6,
"isGraduated":false,
"friends":[
{
"name":"Magdalena",
"email":"[email protected]",
"gender":"male",
"mobile":"734-324-1043",
"cumulativeGPA":92.1
},
{
"name":"Harman",
"email":"[email protected]",
"gender":"male",
"mobile":"158-265-8979",
"cumulativeGPA":87.9
},
{
"name":"Oliver",
"email":"[email protected]",
"gender":"female",
"mobile":"500-958-5193",
"cumulativeGPA":67.9
}
],
"age":23,
"image" : {"name":"ghklk.png", "height": 50, "width":30},
"idea": "e-collage",
"grantedAmount": 0
}]
const { PubSub } = require('graphql-subscriptions')
const pubSub = new PubSub()
const resolvers = {
Gender: {
MALE: 'male',
FEMALE: 'female',
},
Query: {
getUserByID: (_, {id}) => users.find(user => user.id == id),
users: () => users,
},
Mutation: {
createUser: async (_, args) => {
if (users.find(user => user.email === args.email)) {
throw new Error('user already exist')
}
const user = { ...args, id: users.length + 1 };
users = users.concat(user);
pubSub.publish('USER_ADDED', { userAdded: user })
return user
}
},
Subscription: {
userAdded: {
subscribe: () => pubSub.asyncIterator(['USER_ADDED']),
}
}
};
module.exports = { resolvers };型
typeDefs.js
const { gql } = require('apollo-server-express');
const typeDefs = gql`
type User {
id: ID!
name: String!
email: String!
gender: Gender!
mobile: String!
cumulativeGPA:Float!
isGraduated: Boolean
friends: [Friend]!
age: Int!
image: Image
}
enum Gender {
MALE
FEMALE
}
type Friend{
name: String!
email: String!
gender: Gender!
mobile: String!
cumulativeGPA:Float!
}
type Image{
name: String!
height: Int!
width: Int!
}
type Query {
users: [User]
getUserByID(id: ID!): User
}
type Mutation {
createUser(
name: String!
email: String!
gender: Gender!
mobile: String!
cumulativeGPA:Float!
isGraduated: Boolean
friends: [FriendInput]!
age: Int!
image: ImageInput
): User
}
type Subscription {
userAdded: User
}
input ImageInput{
name: String!
height: Int!
width: Int!
}
input FriendInput{
name: String!
email: String!
gender: Gender!
mobile: String!
cumulativeGPA:Float!
}
`;
module.exports = { typeDefs };型
没有客户端，只是我需要尝试从服务器端订阅apollo-sandbox [1]：https://www.apollographql.com/docs/apollo-server/data/subscriptions/
1条答案
按热度按时间mbskvtky1#
我遇到了类似的问题，对我起作用的是以下几点：
1.进入Apollo Studio沙盒中的“Explorer Settings”（齿轮图标）。
1.点击“编辑”
1.将“订阅”端点设置为“ws：//localhost：4000/graphql”
1.将“实现”更改为“graphql-ws”
1.保存并重试订阅操作