68 lines
2.5 KiB
JavaScript
68 lines
2.5 KiB
JavaScript
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/*
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Copyright 2018 New Vector Ltd
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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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import Promise from 'bluebird';
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import request from 'browser-request';
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export async function getVectorConfig(relativeLocation) {
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if (relativeLocation === undefined) relativeLocation = '';
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if (relativeLocation !== '' && !relativeLocation.endsWith('/')) relativeLocation += '/';
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try {
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const configJson = await getConfig(`${relativeLocation}config.${document.domain}.json`);
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// 404s succeed with an empty json config, so check that there are keys
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if (Object.keys(configJson).length === 0) {
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throw new Error(); // throw to enter the catch
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}
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return configJson;
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} catch (e) {
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return await getConfig(relativeLocation + "config.json");
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}
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}
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function getConfig(configJsonFilename) {
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let deferred = Promise.defer();
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request(
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{ method: "GET", url: configJsonFilename },
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(err, response, body) => {
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if (err || response.status < 200 || response.status >= 300) {
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// Lack of a config isn't an error, we should
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// just use the defaults.
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// Also treat a blank config as no config, assuming
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// the status code is 0, because we don't get 404s
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// from file: URIs so this is the only way we can
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// not fail if the file doesn't exist when loading
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// from a file:// URI.
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if (response) {
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if (response.status == 404 || (response.status == 0 && body == '')) {
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deferred.resolve({});
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}
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}
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deferred.reject({err: err, response: response});
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return;
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}
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// We parse the JSON ourselves rather than use the JSON
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// parameter, since this throws a parse error on empty
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// which breaks if there's no config.json and we're
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// loading from the filesystem (see above).
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deferred.resolve(JSON.parse(body));
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}
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);
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return deferred.promise;
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}
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