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@uppy/utils: improve support of data URI in dataURItoBlob (#3080)

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This commit is contained in:
Antoine du Hamel 2021-08-06 12:08:32 +02:00
parent 6cd5309544
commit 0cccb686fd
1 changed files with 16 additions and 20 deletions
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36
packages/@uppy/utils/src/dataURItoBlob.js
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@ -1,32 +1,28 @@
const DATA_URL_PATTERN = /^data:([^/]+\/[^,;]+(?:[^,]*?))(;base64)?,([\s\S]*)$/
module.exports = function dataURItoBlob (dataURI, opts, toFile) {
// get the base64 data
const data = dataURI.split(',')[1]
const dataURIData = DATA_URL_PATTERN.exec(dataURI)
// user may provide mime type, if not get it from data URI
let mimeType = opts.mimeType || dataURI.split(',')[0].split(':')[1].split(';')[0]
const mimeType = opts.mimeType ?? dataURIData?.[1] ?? 'plain/text'
// default to plain/text if data URI has no mimeType
if (mimeType == null) {
mimeType = 'plain/text'
}
const binary = atob(data)
const array = []
for (let i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i))
}
let bytes
try {
bytes = new Uint8Array(array)
} catch (err) {
return null
let data
if (dataURIData[2] != null) {
const binary = atob(decodeURIComponent(dataURIData[3]))
const bytes = new Uint8Array(binary.length)
for (let i = 0; i < binary.length; i++) {
bytes[i] = binary.charCodeAt(i)
}
data = [bytes]
} else {
data = [decodeURIComponent(dataURIData[3])]
}
// Convert to a File?
if (toFile) {
return new File([bytes], opts.name || '', { type: mimeType })
return new File(data, opts.name || '', { type: mimeType })
}
return new Blob([bytes], { type: mimeType })
return new Blob(data, { type: mimeType })
}