29 lines
833 B
JavaScript
29 lines
833 B
JavaScript
const DATA_URL_PATTERN = /^data:([^/]+\/[^,;]+(?:[^,]*?))(;base64)?,([\s\S]*)$/
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export default function dataURItoBlob (dataURI, opts, toFile) {
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// get the base64 data
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const dataURIData = DATA_URL_PATTERN.exec(dataURI)
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// user may provide mime type, if not get it from data URI
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const mimeType = opts.mimeType ?? dataURIData?.[1] ?? 'plain/text'
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let data
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if (dataURIData[2] != null) {
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const binary = atob(decodeURIComponent(dataURIData[3]))
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const bytes = new Uint8Array(binary.length)
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for (let i = 0; i < binary.length; i++) {
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bytes[i] = binary.charCodeAt(i)
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}
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data = [bytes]
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} else {
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data = [decodeURIComponent(dataURIData[3])]
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}
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// Convert to a File?
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if (toFile) {
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return new File(data, opts.name || '', { type: mimeType })
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}
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return new Blob(data, { type: mimeType })
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}
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