无法使用 Apollo-Client HttpLink 连接到 GraphQL 服务器

Question

运行在模拟器上。

Error: Network error: Network request failed
    at new ApolloError (bundle.umd.js:92)
    at Object.error (bundle.umd.js:1323)
    at notifySubscription (Observable.js:134)
    at onNotify (Observable.js:165)
    at SubscriptionObserver.error (Observable.js:224)
    at bundle.umd.js:1100
    at Set.forEach (<anonymous>)
    at Object.error (bundle.umd.js:1099)
    at notifySubscription (Observable.js:134)
    at onNotify (Observable.js:165)

import ApolloClient, { gql, HttpLink, ApolloLink , concat } from "apollo-boost";
const httpLink = new HttpLink({ 
    uri: 'http://localhost:4000' 
});
const client = new ApolloClient({ 
    link:  httpLink, //using uri: 'http://localhost:4000' works.
});

"apollo-boost": "^0.4.3",
"react-apollo": "^2.5.8",
"graphql": "^14.4.2",

        <key>NSAppTransportSecurity</key>
    <dict>
        <key>NSAllowsArbitraryLoads</key>
        <true/>
        <key>NSExceptionDomains</key>
        <dict>
            <key>localhost</key>
            <dict>
                <key>NSExceptionAllowsInsecureHTTPLoads</key>
                <true/>
            </dict>
        </dict>
    </dict>

Answer 1

Apollo Boost 明确不接受链接。它旨在成为一种快速开始使用 Apollo Client 的方法，而无需下载通常需要的所有包。 Apollo Boost 在后台为您创建所有链接。如果您想自己明确定义它们，migrate to the regular client.

无法使用 Apollo-Client HttpLink 连接到 GraphQL 服务器

Cannot connect to GraphQL server using Apollo-Client HttpLink

http

apollo

app-transport-security

apollo-server

apollo-client