req 在 Apollo Server 上下文中始终未定义

Posted 2023-03-10

【中文标题】req 在 Apollo Server 上下文中始终未定义

【英文标题】：req always undefined in Apollo Server context

【发布时间】：2019-07-15 02:30:26

【问题描述】：

我对 apollo-server 上下文有疑问。我写了以下代码：

const  ApolloServer  = require("apollo-server-azure-functions");
const  typeDefs, resolvers  = require('../graphql_schema/schema');

const server = new ApolloServer(
    typeDefs,
    resolvers, 
    context: ( req ) => 
      console.log(req);
      return 
        req: req
      
    ,
    introspection: false,
    playground: true,
  );

  module.exports = server.createHandler();

但是 req 变量总是未定义的。 有人有想法吗？

我正在使用以下版本的阿波罗

"apollo-server": "^2.4.2",
"apollo-server-azure-functions": "^2.4.2",

非常感谢。

【参考方案1】：

我有解决问题的办法。

context: ( req ) =>... 

不要解构req，应该是：

context: (req) => ...

---

const  ApolloServer  = require("apollo-server-azure-functions");
const  typeDefs, resolvers  = require('../graphql_schema/schema');

const server = new ApolloServer(
    typeDefs,
    resolvers, 
    context: (req) => 
      return 
        accesstoken: GetAccessToken(req.request)
      
    ,
    introspection: false,
    playground: true,
  );

  const GetAccessToken = function (request)
    const token = (request.headers.authorization || '').replace('BEARER ', '');
    return token;
  

  module.exports = server.createHandler();

【参考方案2】：

需要在顶部定义req参数

const  ApolloServer  = require("apollo-server-azure-functions");
const  typeDefs, resolvers  = require('../graphql_schema/schema');

const server = new ApolloServer(
    typeDefs,
    resolvers,
    req,
    context: ( req ) => 
      console.log(req);
      return 
        req: req
      
    ,
    introspection: false,
    playground: true,
  );

  module.exports = server.createHandler();