React Native Apollo错误："Network error: Network request failed“

Question

在IOS上，应用程序运行正常。但在Android上，我得到了这个错误。这是我在客户端和服务器端的配置。请帮帮我！

错误：Error image

以下是客户端的配置：

import ApolloClient, { createNetworkInterface } from 'apollo-client';
import { SubscriptionClient, addGraphQLSubscriptions } from 'subscriptions-transport-ws';

const networkInterface = createNetworkInterface({ uri: 'http://localhost:3000/graphql' });

const wsClient = new SubscriptionClient('ws://localhost:3000/subscriptions', {
  reconnect: true,
});

const networkInterfaceWithSubscriptions = addGraphQLSubscriptions(
  networkInterface,
  wsClient,
);

export const client = new ApolloClient({
  networkInterface: networkInterfaceWithSubscriptions,
});

下面是服务器上的配置：

import express from 'express';
import {
  graphqlExpress,
  graphiqlExpress,
} from 'graphql-server-express';
import bodyParser from 'body-parser';
import cors from 'cors';
import { execute, subscribe } from 'graphql';
import { createServer } from 'http';
import { SubscriptionServer } from 'subscriptions-transport-ws';
import { schema } from './schema';

const PORT = 3000;
const server = express();

server.use('*', cors({ origin: 'http://localhost:8081' }));
server.use('/graphql', bodyParser.json(), graphqlExpress({ schema }));
server.use('/graphiql', graphiqlExpress({
  endpointURL: '/graphql',
  subscriptionsEndpoint: 'ws://localhost:3000/subscriptions',
}));

// We wrap the express server so that we can attach the WebSocket for subscriptions
const ws = createServer(server);
ws.listen(PORT, () => {
  console.log('GraphQL Server is running');
  // Set up the WebSocket for handling GraphQL subscriptions
  new SubscriptionServer({
    execute,
    subscribe,
    schema
  }, {
    server: ws,
    path: '/subscriptions',
  });
});

我使用的是react-apollo: 1.4.10，apollo-client: 1.9.0-0

Answer 1

基本上，您必须将lochalhost替换为您计算机的IP地址。此问题已在此处报告，https://github.com/apollographql/apollo-client/issues/1757

要检查您的IP地址，请参阅此视频https://www.youtube.com/watch?v=TRFtQzx0Y0M

Answer 2

我也有同样的问题，我在这里找到了我的解决方案https://github.com/apollographql/apollo-client/issues/1757

基本上，您需要在createNetworkInterface函数中使用计算机的ip地址，因此请更改以下内容：

const networkInterface = createNetworkInterface({ uri: 'http://localhost:3000/graphql' });

要这样做：

const networkInterface = createNetworkInterface({ uri: 'http://YOURIPADDRESS:3000/graphql' });

Answer 3

由于我是在模拟器上工作，因此将localhost更改为127.0.0.1对我很有效：

const link = new HttpLink({ uri: 'http://127.0.0.1:3500/graphql' });

const client = new ApolloClient({
  link,
  cache
})