forked from mystiq/hydrogen-web
54 lines
1.9 KiB
JavaScript
54 lines
1.9 KiB
JavaScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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function normalizeHomeserver(homeserver) {
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try {
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return new URL(homeserver).origin;
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} catch (err) {
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return new URL(`https://${homeserver}`).origin;
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}
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}
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async function getWellKnownResponse(homeserver, request) {
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const requestOptions = {format: "json", timeout: 30000, method: "GET"};
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try {
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const wellKnownUrl = `${homeserver}/.well-known/matrix/client`;
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return await request(wellKnownUrl, requestOptions).response();
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} catch (err) {
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if (err.name === "ConnectionError") {
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// don't fail lookup on a ConnectionError,
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// there might be a missing CORS header on a 404 response or something,
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// which won't be a problem necessarily with homeserver requests later on ...
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return null;
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} else {
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throw err;
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}
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}
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}
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export async function lookupHomeserver(homeserver, request) {
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homeserver = normalizeHomeserver(homeserver);
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const wellKnownResponse = await getWellKnownResponse(homeserver, request);
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if (wellKnownResponse && wellKnownResponse.status === 200) {
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const {body} = wellKnownResponse;
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const wellKnownHomeserver = body["m.homeserver"]?.["base_url"];
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if (typeof wellKnownHomeserver === "string") {
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homeserver = normalizeHomeserver(wellKnownHomeserver);
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}
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}
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return homeserver;
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}
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