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39 lines
989 B
39 lines
989 B
2 years ago
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import assertString from './util/assertString';
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var validMediaType = /^[a-z]+\/[a-z0-9\-\+]+$/i;
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var validAttribute = /^[a-z\-]+=[a-z0-9\-]+$/i;
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var validData = /^[a-z0-9!\$&'\(\)\*\+,;=\-\._~:@\/\?%\s]*$/i;
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export default function isDataURI(str) {
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assertString(str);
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var data = str.split(',');
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if (data.length < 2) {
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return false;
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}
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var attributes = data.shift().trim().split(';');
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var schemeAndMediaType = attributes.shift();
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if (schemeAndMediaType.substr(0, 5) !== 'data:') {
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return false;
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}
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var mediaType = schemeAndMediaType.substr(5);
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if (mediaType !== '' && !validMediaType.test(mediaType)) {
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return false;
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}
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for (var i = 0; i < attributes.length; i++) {
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if (!(i === attributes.length - 1 && attributes[i].toLowerCase() === 'base64') && !validAttribute.test(attributes[i])) {
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return false;
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}
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}
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for (var _i = 0; _i < data.length; _i++) {
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if (!validData.test(data[_i])) {
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return false;
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}
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}
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return true;
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}
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