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import * as Router from '@koa/router';
import config from '../config';
import parseAcct from '../misc/acct/parse';
import Acct from '../misc/acct/type';
import { links } from './nodeinfo';
import { escapeAttribute, escapeValue } from '../prelude/xml';
import { Users } from '../models';
import { User } from '../models/entities/user';
// Init router
const router = new Router();
const XRD = (...x: { element: string, value?: string, attributes?: Record<string, string> }[]) =>
`<?xml version="1.0" encoding="UTF-8"?><XRD xmlns="http://docs.oasis-open.org/ns/xri/xrd-1.0">${x.map(({ element, value, attributes }) =>
`<${
Object.entries(typeof attributes === 'object' && attributes || {}).reduce((a, [k, v]) => `${a} ${k}="${escapeAttribute(v)}"`, element)
}${
typeof value === 'string' ? `>${escapeValue(value)}</${element}` : '/'
}>`).reduce((a, c) => a + c, '')}</XRD>`;
const allPath = '/.well-known/(.*)';
const webFingerPath = '/.well-known/webfinger';
const jrd = 'application/jrd+json';
const xrd = 'application/xrd+xml';
router.use(allPath, async (ctx, next) => {
ctx.set({
'Access-Control-Allow-Headers': 'Accept',
'Access-Control-Allow-Methods': 'GET, OPTIONS',
'Access-Control-Allow-Origin': '*',
'Access-Control-Expose-Headers': 'Vary',
});
await next();
});
router.options(allPath, async ctx => {
ctx.status = 204;
});
router.get('/.well-known/host-meta', async ctx => {
ctx.set('Content-Type', xrd);
ctx.body = XRD({ element: 'Link', attributes: {
type: xrd,
template: `${config.url}${webFingerPath}?resource={uri}`
}});
});
router.get('/.well-known/host-meta.json', async ctx => {
ctx.set('Content-Type', jrd);
ctx.body = {
links: [{
rel: 'lrdd',
type: jrd,
template: `${config.url}${webFingerPath}?resource={uri}`
}]
};
});
router.get('/.well-known/nodeinfo', async ctx => {
ctx.body = { links };
});
router.get(webFingerPath, async ctx => {
const fromId = (id: User['id']): Record<string, any> => ({
id,
host: null,
isSuspended: false
});
const generateQuery = (resource: string) =>
resource.startsWith(`${config.url.toLowerCase()}/users/`) ?
fromId(resource.split('/').pop()!) :
fromAcct(parseAcct(
resource.startsWith(`${config.url.toLowerCase()}/@`) ? resource.split('/').pop()! :
resource.startsWith('acct:') ? resource.slice('acct:'.length) :
resource));
const fromAcct = (acct: Acct): Record<string, any> | number =>
!acct.host || acct.host === config.host.toLowerCase() ? {
usernameLower: acct.username,
host: null,
isSuspended: false
} : 422;
if (typeof ctx.query.resource !== 'string') {
ctx.status = 400;
return;
}
const query = generateQuery(ctx.query.resource.toLowerCase());
if (typeof query === 'number') {
ctx.status = query;
return;
}
const user = await Users.findOne(query);
if (user == null) {
ctx.status = 404;
return;
}
const subject = `acct:${user.username}@${config.host}`;
const self = {
rel: 'self',
type: 'application/activity+json',
href: `${config.url}/users/${user.id}`
};
const profilePage = {
rel: 'http://webfinger.net/rel/profile-page',
type: 'text/html',
href: `${config.url}/@${user.username}`
};
const subscribe = {
rel: 'http://ostatus.org/schema/1.0/subscribe',
template: `${config.url}/authorize-follow?acct={uri}`
};
if (ctx.accepts(jrd, xrd) === xrd) {
ctx.body = XRD(
{ element: 'Subject', value: subject },
{ element: 'Link', attributes: self },
{ element: 'Link', attributes: profilePage },
{ element: 'Link', attributes: subscribe });
ctx.type = xrd;
} else {
ctx.body = {
subject,
links: [self, profilePage, subscribe]
};
ctx.type = jrd;
}
ctx.vary('Accept');
ctx.set('Cache-Control', 'public, max-age=180');
});
// Return 404 for other .well-known
router.all(allPath, async ctx => {
ctx.status = 404;
});
export default router;
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