powerbi-visuals-utils-dataviewutils
Version:
46 lines • 2.27 kB
JavaScript
/*
* Power BI Visualizations
*
* Copyright (c) Microsoft Corporation
* All rights reserved.
* MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the ""Software""), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
export function isImageUrlAllowed(url) {
// Excludes all URLs that don't contain .gif .jpg .png or .svg extensions and don't start from "http(s)://".
// Base64 incoded images are allowable too.
return (/^https?:\/\/.+\.(gif|jpg|png|svg)$/i).test(url) || (/^data:image\/(gif|jpeg|png|svg\+xml);base64,/i).test(url);
}
export function isFileImage(url, imageCheckResultCallBack) {
let request = new XMLHttpRequest();
request.onreadystatechange = function () {
if (request.readyState !== this.HEADERS_RECEIVED) {
return;
}
let contentType = request.getResponseHeader("Content-Type"), supportedTypes = ["image/png", "image/jpeg", "image/gif", "image/svg+xml"];
if (supportedTypes.indexOf(contentType) > -1) {
return imageCheckResultCallBack(true, contentType);
}
return imageCheckResultCallBack(false, contentType);
};
request.open("HEAD", url, true);
request.send();
}
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