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battledotnet.ts
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battledotnet.ts
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import type { H3Event } from 'h3'
import { eventHandler, getQuery, sendRedirect } from 'h3'
import { withQuery } from 'ufo'
import { defu } from 'defu'
import { randomUUID } from 'uncrypto'
import { handleMissingConfiguration, handleAccessTokenErrorResponse, getOAuthRedirectURL, requestAccessToken } from '../utils'
import { useRuntimeConfig, createError } from '#imports'
import type { OAuthConfig } from '#auth-utils'
export interface OAuthBattledotnetConfig {
/**
* Battle.net OAuth Client ID
* @default process.env.NUXT_OAUTH_BATTLEDOTNET_CLIENT_ID
*/
clientId?: string
/**
* Battle.net OAuth Client Secret
* @default process.env.NUXT_OAUTH_BATTLEDOTNET_CLIENT_SECRET
*/
clientSecret?: string
/**
* Battle.net OAuth Scope
* @default []
* @see https://develop.battle.net/documentation/guides/using-oauth
* @example ['openid', 'wow.profile', 'sc2.profile', 'd3.profile']
*/
scope?: string[]
/**
* Battle.net OAuth Region
* @default EU
* @see https://develop.battle.net/documentation/guides/using-oauth
* @example EU (possible values: US, EU, APAC)
*/
region?: string
/**
* Battle.net OAuth Authorization URL
* @default 'https://oauth.battle.net/authorize'
*/
authorizationURL?: string
/**
* Battle.net OAuth Token URL
* @default 'https://oauth.battle.net/token'
*/
tokenURL?: string
/**
* Extra authorization parameters to provide to the authorization URL
* @see https://develop.battle.net/documentation/guides/using-oauth/authorization-code-flow
*/
authorizationParams?: Record<string, string>
/**
* Redirect URL to to allow overriding for situations like prod failing to determine public hostname
* @default process.env.NUXT_OAUTH_BATTLEDOTNET_REDIRECT_URL or current URL
*/
redirectURL?: string
}
export function defineOAuthBattledotnetEventHandler({ config, onSuccess, onError }: OAuthConfig<OAuthBattledotnetConfig>) {
return eventHandler(async (event: H3Event) => {
config = defu(config, useRuntimeConfig(event).oauth?.battledotnet, {
authorizationURL: 'https://oauth.battle.net/authorize',
tokenURL: 'https://oauth.battle.net/token',
authorizationParams: {},
}) as OAuthBattledotnetConfig
const query = getQuery<{ code?: string, error?: string }>(event)
if (query.error) {
const error = createError({
statusCode: 401,
message: `Battle.net login failed: ${query.error || 'Unknown error'}`,
data: query,
})
if (!onError) throw error
return onError(event, error)
}
if (!config.clientId || !config.clientSecret) {
return handleMissingConfiguration(event, 'battledotnet', ['clientId', 'clientSecret'], onError,
)
}
const redirectURL = config.redirectURL || getOAuthRedirectURL(event)
if (!query.code) {
config.scope = config.scope || ['openid']
config.region = config.region || 'EU'
if (config.region === 'CN') {
config.authorizationURL = 'https://oauth.battlenet.com.cn/authorize'
config.tokenURL = 'https://oauth.battlenet.com.cn/token'
}
// Redirect to Battle.net Oauth page
return sendRedirect(
event,
withQuery(config.authorizationURL as string, {
client_id: config.clientId,
redirect_uri: redirectURL,
scope: config.scope.join(' '),
state: randomUUID(), // Todo: handle PKCE flow
response_type: 'code',
...config.authorizationParams,
}),
)
}
config.scope = config.scope || []
if (!config.scope.includes('openid')) {
config.scope.push('openid')
}
const tokens = await requestAccessToken(config.tokenURL as string, {
headers: {
Authorization: `Basic ${Buffer.from(`${config.clientId}:${config.clientSecret}`).toString('base64')}`,
},
params: {
grant_type: 'authorization_code',
scope: config.scope.join(' '),
redirect_uri: redirectURL,
code: query.code,
},
})
if (tokens.error) {
return handleAccessTokenErrorResponse(event, 'battle.net', tokens, onError)
}
const accessToken = tokens.access_token
// TODO: improve typing
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const user: any = await $fetch('https://oauth.battle.net/userinfo', {
headers: {
'User-Agent': `Battledotnet-OAuth-${config.clientId}`,
'Authorization': `Bearer ${accessToken}`,
},
})
if (!user) {
const error = createError({
statusCode: 500,
message: 'Could not get Battle.net user',
data: tokens,
})
if (!onError) throw error
return onError(event, error)
}
return onSuccess(event, {
user,
tokens,
})
})
}