61 lines
2.4 KiB
TypeScript
61 lines
2.4 KiB
TypeScript
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/*
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Copyright 2015, 2016 OpenMarket Ltd
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Copyright 2017 Vector Creations Ltd
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Copyright 2018, 2019 New Vector Ltd
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Copyright 2019 Michael Telatynski <7t3chguy@gmail.com>
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Copyright 2020 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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// @ts-ignore
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import olmWasmPath from "olm/olm.wasm";
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import Olm from 'olm';
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export function loadOlm() {
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/* Load Olm. We try the WebAssembly version first, and then the legacy,
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* asm.js version if that fails. For this reason we need to wait for this
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* to finish before continuing to load the rest of the app. In future
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* we could somehow pass a promise down to react-sdk and have it wait on
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* that so olm can be loading in parallel with the rest of the app.
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*
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* We also need to tell the Olm js to look for its wasm file at the same
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* level as index.html. It really should be in the same place as the js,
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* ie. in the bundle directory, but as far as I can tell this is
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* completely impossible with webpack. We do, however, use a hashed
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* filename to avoid caching issues.
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*/
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return Olm.init({
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locateFile: () => olmWasmPath,
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}).then(() => {
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console.log("Using WebAssembly Olm");
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}).catch((e) => {
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console.log("Failed to load Olm: trying legacy version", e);
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return new Promise((resolve, reject) => {
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const s = document.createElement('script');
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s.src = 'olm_legacy.js'; // XXX: This should be cache-busted too
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s.onload = resolve;
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s.onerror = reject;
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document.body.appendChild(s);
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}).then(() => {
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// Init window.Olm, ie. the one just loaded by the script tag,
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// not 'Olm' which is still the failed wasm version.
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return window.Olm.init();
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}).then(() => {
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console.log("Using legacy Olm");
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}).catch((e) => {
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console.log("Both WebAssembly and asm.js Olm failed!", e);
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});
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});
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}
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