forked from nextauthjs/next-auth
/
callback.ts
433 lines (389 loc) · 12.7 KB
/
callback.ts
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import oAuthCallback from "../lib/oauth/callback"
import callbackHandler from "../lib/callback-handler"
import { hashToken } from "../lib/utils"
import type { InternalOptions } from "../types"
import type { RequestInternal, OutgoingResponse } from ".."
import type { Cookie, SessionStore } from "../lib/cookie"
import type { User } from "../.."
/** Handle callbacks from login services */
export default async function callback(params: {
options: InternalOptions<"oauth" | "credentials" | "email">
query: RequestInternal["query"]
method: Required<RequestInternal>["method"]
body: RequestInternal["body"]
headers: RequestInternal["headers"]
cookies: RequestInternal["cookies"]
sessionStore: SessionStore
}): Promise<OutgoingResponse> {
const { options, query, body, method, headers, sessionStore } = params
const {
provider,
adapter,
url,
callbackUrl,
pages,
jwt,
events,
callbacks,
session: { strategy: sessionStrategy, maxAge: sessionMaxAge },
logger,
} = options
const cookies: Cookie[] = []
const useJwtSession = sessionStrategy === "jwt"
if (provider.type === "oauth") {
try {
const {
profile,
account,
OAuthProfile,
cookies: oauthCookies,
} = await oAuthCallback({
query,
body,
method,
options,
cookies: params.cookies,
})
if (oauthCookies) cookies.push(...oauthCookies)
try {
// Make it easier to debug when adding a new provider
logger.debug("OAUTH_CALLBACK_RESPONSE", {
profile,
account,
OAuthProfile,
})
// If we don't have a profile object then either something went wrong
// or the user cancelled signing in. We don't know which, so we just
// direct the user to the signin page for now. We could do something
// else in future.
//
// Note: In oAuthCallback an error is logged with debug info, so it
// should at least be visible to developers what happened if it is an
// error with the provider.
if (!profile) {
return { redirect: `${url}/signin`, cookies }
}
// Check if user is allowed to sign in
// Attempt to get Profile from OAuth provider details before invoking
// signIn callback - but if no user object is returned, that is fine
// (that just means it's a new user signing in for the first time).
let userOrProfile = profile
if (adapter) {
const { getUserByAccount } = adapter
const userByAccount = await getUserByAccount({
// @ts-expect-error
providerAccountId: account.providerAccountId,
provider: provider.id,
})
if (userByAccount) userOrProfile = userByAccount
}
try {
const isAllowed = await callbacks.signIn({
user: userOrProfile,
// @ts-expect-error
account,
profile: OAuthProfile,
})
if (!isAllowed) {
return { redirect: `${url}/error?error=AccessDenied`, cookies }
} else if (typeof isAllowed === "string") {
return { redirect: isAllowed, cookies }
}
} catch (error) {
return {
redirect: `${url}/error?error=${encodeURIComponent(
(error as Error).message
)}`,
cookies,
}
}
// Sign user in
// @ts-expect-error
const { user, session, isNewUser } = await callbackHandler({
sessionToken: sessionStore.value,
profile,
// @ts-expect-error
account,
options,
})
if (useJwtSession) {
const defaultToken = {
name: user.name,
email: user.email,
picture: user.image,
sub: user.id?.toString(),
}
const token = await callbacks.jwt({
token: defaultToken,
user,
// @ts-expect-error
account,
profile: OAuthProfile,
isNewUser,
})
// Encode token
const newToken = await jwt.encode({ ...jwt, token })
// Set cookie expiry date
const cookieExpires = new Date()
cookieExpires.setTime(cookieExpires.getTime() + sessionMaxAge * 1000)
const sessionCookies = sessionStore.chunk(newToken, {
expires: cookieExpires,
})
cookies.push(...sessionCookies)
} else {
// Save Session Token in cookie
cookies.push({
name: options.cookies.sessionToken.name,
value: session.sessionToken,
options: {
...options.cookies.sessionToken.options,
expires: session.expires,
},
})
}
// @ts-expect-error
await events.signIn?.({ user, account, profile, isNewUser })
// Handle first logins on new accounts
// e.g. option to send users to a new account landing page on initial login
// Note that the callback URL is preserved, so the journey can still be resumed
if (isNewUser && pages.newUser) {
return {
redirect: `${pages.newUser}${
pages.newUser.includes("?") ? "&" : "?"
}callbackUrl=${encodeURIComponent(callbackUrl)}`,
cookies,
}
}
// Callback URL is already verified at this point, so safe to use if specified
return { redirect: callbackUrl, cookies }
} catch (error) {
if ((error as Error).name === "AccountNotLinkedError") {
// If the email on the account is already linked, but not with this OAuth account
return {
redirect: `${url}/error?error=OAuthAccountNotLinked`,
cookies,
}
} else if ((error as Error).name === "CreateUserError") {
return { redirect: `${url}/error?error=OAuthCreateAccount`, cookies }
}
logger.error("OAUTH_CALLBACK_HANDLER_ERROR", error as Error)
return { redirect: `${url}/error?error=Callback`, cookies }
}
} catch (error) {
if ((error as Error).name === "OAuthCallbackError") {
logger.error("OAUTH_CALLBACK_ERROR", {
error: error as Error,
providerId: provider.id,
})
return { redirect: `${url}/error?error=OAuthCallback`, cookies }
}
logger.error("OAUTH_CALLBACK_ERROR", error as Error)
return { redirect: `${url}/error?error=Callback`, cookies }
}
} else if (provider.type === "email") {
try {
// Verified in `assertConfig`
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
const { useVerificationToken, getUserByEmail } = adapter!
const token = query?.token
const identifier = query?.email
const invite = await useVerificationToken?.({
identifier,
token: hashToken(token, options),
})
const invalidInvite = !invite || invite.expires.valueOf() < Date.now()
if (invalidInvite) {
return { redirect: `${url}/error?error=Verification`, cookies }
}
// If it is an existing user, use that, otherwise use a placeholder
const profile = (identifier
? await getUserByEmail(identifier)
: null) ?? {
email: identifier,
}
/** @type {import("src").Account} */
const account = {
providerAccountId: profile.email,
type: "email",
provider: provider.id,
}
// Check if user is allowed to sign in
try {
const signInCallbackResponse = await callbacks.signIn({
// @ts-expect-error
user: profile,
// @ts-expect-error
account,
// @ts-expect-error
email: { email: identifier },
})
if (!signInCallbackResponse) {
return { redirect: `${url}/error?error=AccessDenied`, cookies }
} else if (typeof signInCallbackResponse === "string") {
return { redirect: signInCallbackResponse, cookies }
}
} catch (error) {
return {
redirect: `${url}/error?error=${encodeURIComponent(
(error as Error).message
)}`,
cookies,
}
}
// Sign user in
// @ts-expect-error
const { user, session, isNewUser } = await callbackHandler({
sessionToken: sessionStore.value,
// @ts-expect-error
profile,
// @ts-expect-error
account,
options,
})
if (useJwtSession) {
const defaultToken = {
name: user.name,
email: user.email,
picture: user.image,
sub: user.id?.toString(),
}
const token = await callbacks.jwt({
token: defaultToken,
user,
// @ts-expect-error
account,
isNewUser,
})
// Encode token
const newToken = await jwt.encode({ ...jwt, token })
// Set cookie expiry date
const cookieExpires = new Date()
cookieExpires.setTime(cookieExpires.getTime() + sessionMaxAge * 1000)
const sessionCookies = sessionStore.chunk(newToken, {
expires: cookieExpires,
})
cookies.push(...sessionCookies)
} else {
// Save Session Token in cookie
cookies.push({
name: options.cookies.sessionToken.name,
value: session.sessionToken,
options: {
...options.cookies.sessionToken.options,
expires: session.expires,
},
})
}
// @ts-expect-error
await events.signIn?.({ user, account, isNewUser })
// Handle first logins on new accounts
// e.g. option to send users to a new account landing page on initial login
// Note that the callback URL is preserved, so the journey can still be resumed
if (isNewUser && pages.newUser) {
return {
redirect: `${pages.newUser}${
pages.newUser.includes("?") ? "&" : "?"
}callbackUrl=${encodeURIComponent(callbackUrl)}`,
cookies,
}
}
// Callback URL is already verified at this point, so safe to use if specified
return { redirect: callbackUrl, cookies }
} catch (error) {
if ((error as Error).name === "CreateUserError") {
return { redirect: `${url}/error?error=EmailCreateAccount`, cookies }
}
logger.error("CALLBACK_EMAIL_ERROR", error as Error)
return { redirect: `${url}/error?error=Callback`, cookies }
}
} else if (provider.type === "credentials" && method === "POST") {
const credentials = body
let user: User
try {
user = (await provider.authorize(credentials, {
query,
body,
headers,
method,
})) as User
if (!user) {
return {
status: 401,
redirect: `${url}/error?${new URLSearchParams({
error: "CredentialsSignin",
provider: provider.id,
})}`,
cookies,
}
}
} catch (error) {
return {
status: 401,
redirect: `${url}/error?error=${encodeURIComponent(
(error as Error).message
)}`,
cookies,
}
}
/** @type {import("src").Account} */
const account = {
providerAccountId: user.id,
type: "credentials",
provider: provider.id,
}
try {
const isAllowed = await callbacks.signIn({
user,
// @ts-expect-error
account,
credentials,
})
if (!isAllowed) {
return {
status: 403,
redirect: `${url}/error?error=AccessDenied`,
cookies,
}
} else if (typeof isAllowed === "string") {
return { redirect: isAllowed, cookies }
}
} catch (error) {
return {
redirect: `${url}/error?error=${encodeURIComponent(
(error as Error).message
)}`,
cookies,
}
}
const defaultToken = {
name: user.name,
email: user.email,
picture: user.image,
sub: user.id?.toString(),
}
const token = await callbacks.jwt({
token: defaultToken,
user,
// @ts-expect-error
account,
isNewUser: false,
})
// Encode token
const newToken = await jwt.encode({ ...jwt, token })
// Set cookie expiry date
const cookieExpires = new Date()
cookieExpires.setTime(cookieExpires.getTime() + sessionMaxAge * 1000)
const sessionCookies = sessionStore.chunk(newToken, {
expires: cookieExpires,
})
cookies.push(...sessionCookies)
// @ts-expect-error
await events.signIn?.({ user, account })
return { redirect: callbackUrl, cookies }
}
return {
status: 500,
body: `Error: Callback for provider type ${provider.type} not supported`,
cookies,
}
}