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index.js
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index.js
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import { OAuth2Client } from 'google-auth-library'
export default getAuthenticator
function getAuthenticator({
clientId,
tokenRetriever = getToken,
test = {},
}) {
const authClient = new OAuth2Client(clientId)
return async function authenticate(ctx, next) {
const token = tokenRetriever(ctx.request)
ctx.assert(token, 401, 'authorization token not found')
if (test != undefined && test.token === token) {
ctx.state.user = test.user
await next()
return
}
try {
ctx.state.user = await verifyToken(authClient, token)
} catch(e) {
ctx.throw(401, e)
}
await next()
}
}
function getToken(request) {
return request.headers.authorization
}
function verifyToken(authClient, idToken) {
return new Promise((resolve, reject) => {
authClient.verifyIdToken({ idToken }, (error, result) => {
if (error) {
reject(error)
} else {
resolve(result.getPayload())
}
})
})
}