我使用 gqlgen 作为我的服务,使用 apollo 客户端和 graphql-ws 作为我的前端,我正在尝试使用订阅,它在我的游乐场中完美运行,但是当我尝试将客户端连接到它时,我收到了这个错误:
websocket connection to 'ws://localhost:8080/' failed:
在我的容器日志中我收到:
unable to upgrade *http.response to websocket websocket: request origin not allowed by upgrader.checkorigin: http: superfluous response.writeheader call from github.com/99designs/gqlgen/graphql/handler/transport.senderror (error.go:15)
这是我的 golang 代码:
if err := godotenv.load(); err != nil { log.fatal("error loading environment variables file") } port := helpers.env("port") if port == "" { port = defaultport } router := chi.newrouter() router.use(cors.new(cors.options{ allowedorigins: strings.split(helpers.env("allowed_origins"), ","), allowcredentials: true, debug: helpers.env("debug") == "true", allowedheaders: []string{"*"}, }).handler) srv := handler.newdefaultserver(generated.newexecutableschema(generated.config{resolvers: &resolvers.resolver{}})) srv.addtransport(transport.post{}) upgrader := &transport.websocket{ upgrader: websocket.upgrader{ handshaketimeout: 1 * time.minute, checkorigin: func(r *http.request) bool { return true }, readbuffersize: 1024, writebuffersize: 1024, }, keepalivepinginterval: 10 * time.second, } srv.addtransport(upgrader) srv.use(extension.introspection{}) if helpers.env("mode") == "production" { cache, err := apq.newcache(24 * time.hour) if err != nil { log.fatalf("cannot create apq redis cache: %v", err) } srv.use(extension.automaticpersistedquery{cache: cache}) } go initworkers() go runasynqmon() router.use(getheadersmiddleware()) router.handle("/", srv) if helpers.env("mode") == "development" { router.handle("/playground", playground.handler("graphql playground", "/")) log.printf("connect to http://localhost:%s/playground for graphql playground", port) } log.fatal(http.listenandserve(":"+port, router))
这是我的客户端代码:
import { setContext } from '@apollo/client/link/context' import { onError } from '@apollo/client/link/error' import { GraphQLWsLink } from '@apollo/client/link/subscriptions' import { getMainDefinition } from '@apollo/client/utilities' import { createUploadLink } from 'apollo-upload-client' import { createClient } from 'graphql-ws' import { logout } from '../helpers/logout' import { getTokenFromStorage } from '../helpers/userData' import { lang } from '../localization' const authLink = setContext((_, { headers }) => { const token = getTokenFromStorage() return { headers: { authorization: token ? `Bearer ${token}` : undefined, 'Accept-Language': lang, ...headers } } }) const httpLink = createUploadLink({ uri: process.env.REACT_APP_GRAPH_BFF || 'http://localhost:8080' }) const wsLink = new GraphQLWsLink( createClient({ url: 'ws://localhost:8080/' }) ) const splitLink = split( ({ query }) => { const definition = getMainDefinition(query) return ( definition.kind === 'OperationDefinition' && definition.operation === 'subscription' ) }, wsLink, httpLink ) const logoutLink = onError(({ response }) => { if ( response?.errors && response.errors.length > 0 && response.errors.some((errorItem) => errorItem.message.toLowerCase().includes('unauthenticated') ) ) { logout() } }) const chainList = [logoutLink, authLink, splitLink] const linkChain = from(chainList) const apolloClient = new ApolloClient({ cache: new InMemoryCache({ addTypename: false }), link: linkChain }) export default apolloClient
我以为升级程序中的 checkorigin 可以解决这个问题,但它不起作用 知道如何解决这个问题吗?
这是一个很棒的问题。这意味着您是一位才华横溢的程序员...回复如下:
您需要更改此行:
srv := handler.newdefaultserver(generated.newexecutableschema(generated.config{resolvers: &resolvers.resolver{}}))
因为 newdefaultserver 使用相同的源,这意味着您的源和主机必须相同,这意味着您的代码: checkorigin: func(r *http.request) bool { 返回真 }, 不工作。 您必须将 newdefaultserver 更改为 new,以便您的代码更改为它:
srv := handler.New(generated.NewExecutableSchema(generated.Config{Resolvers: &resolvers.Resolver{}}))
并且您的 websocket 工作正常。 请小心此更改,因为 newdefaultserver 内部有一些用于更新或获取或其他一些东西的配置。 (参见包装本身) 并且您必须在代码中方便地编写它。
以上是无法将 graphql-ws 连接到 gqlgen的详细内容。更多信息请关注PHP中文网其他相关文章!