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handler.js
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handler.js
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'use strict';
const {
ApolloServer
} = require('apollo-server-lambda');
const jwt = require('jsonwebtoken');
const jwkToPem = require('jwk-to-pem');
const jwks = require('./jwks');
const resolvers = require('./resolvers');
const typeDefs = require('./schema');
const getUser = idToken => {
const NO_USER = {};
if (!idToken) return NO_USER;
try {
const pem = jwkToPem(jwks.keys[0]);
const user = jwt.verify(idToken, pem);
if (user) return user;
} catch (err) {
console.error('Failed to authenticate user', err);
}
return NO_USER;
};
const server = new ApolloServer({
typeDefs,
resolvers,
context: ({
event,
context,
}) => {
const idToken = event.headers.Authorization || '';
const user = getUser(idToken);
return {
context,
event,
functionName: context.functionName,
headers: event.headers,
user
};
}
});
exports.graphql = server.createHandler({
cors: {
credentials: true,
origin: '*',
},
});