71 lines
2.2 KiB
JavaScript
71 lines
2.2 KiB
JavaScript
const { Errors } = require('./enig_error');
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const { getAddressedToInfo } = require('./mail_util');
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const Message = require('./message');
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const { getJson } = require('./http_util');
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// deps
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exports.queryWebFinger = queryWebFinger;
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function queryWebFinger(query, cb) {
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//
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// Accept a variety of formats to query via WebFinger
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// 1) @Username@foo.bar -> query with acct:Username resource
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// 2) http/https URL -> query with resource = URL
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// 3) If not one of the above and a '/' is present in the query,
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// assume https:// and try #2
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//
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// ex: @NuSkooler@toot.community -> https://toot.community/.well-known/webfinger with acct:NuSkooler resource
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const addrInfo = getAddressedToInfo(query);
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let resource;
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let host;
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if (
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addrInfo.flavor === Message.AddressFlavor.ActivityPub ||
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addrInfo.flavor === Message.AddressFlavor.Email
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) {
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host = addrInfo.remote.slice(addrInfo.remote.lastIndexOf('@') + 1);
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if (!host) {
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return cb(Errors.Invalid(`Unsure how to WebFinger "${query}"`));
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}
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resource = `acct:${addrInfo.name}@${host}`;
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} else {
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if (!/^https?:\/\/.+$/.test(query)) {
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resource = `https://${query}`;
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} else {
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resource = query;
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}
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try {
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const url = new URL(resource);
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host = url.host;
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} catch (e) {
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return cb(Errors.Invalid(`Cannot WebFinger "${query}": ${e.message}`));
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}
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}
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resource = encodeURIComponent(resource);
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const webFingerUrl = `https://${host}/.well-known/webfinger?resource=${resource}`;
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getJson(webFingerUrl, {}, (err, json, res) => {
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if (err) {
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return cb(err);
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}
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if (res.statusCode !== 200) {
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// only accept 200
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return cb(Errors.DoesNotExist(`Failed to WebFinger URL ${webFingerUrl}`));
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}
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const contentType = res.headers['content-type'] || '';
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if (!contentType.startsWith('application/jrd+json')) {
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return cb(
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Errors.Invalid(
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`Invalid Content-Type for WebFinger URL ${webFingerUrl}: ${contentType}`
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)
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);
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}
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return cb(null, json);
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});
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}
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