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Use blob URI for saving attachments (#432)

This commit is contained in:
R4SAS 2019-06-12 04:37:17 +03:00
parent a459c4692c
commit ff6b9bd8f9
1 changed files with 21 additions and 20 deletions
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41
js/privatebin.js
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@ -2514,32 +2514,33 @@ jQuery.PrivateBin = (function($, RawDeflate) {
*/ */
me.setAttachment = function(attachmentData, fileName) me.setAttachment = function(attachmentData, fileName)
{ {
// data URI format: data:[<mediaType>][;base64],<data>
// position in data URI string of where data begins
const base64Start = attachmentData.indexOf(',') + 1;
// position in data URI string of where mediaType ends
const mediaTypeEnd = attachmentData.indexOf(';');
// extract mediaType
const mediaType = attachmentData.substring(5, mediaTypeEnd);
// extract data and convert to binary
const decodedData = atob(attachmentData.substring(base64Start));
// Transform into a Blob
const buf = new Uint8Array(decodedData.length);
for (let i = 0; i < decodedData.length; ++i) {
buf[i] = decodedData.charCodeAt(i);
}
const blob = new window.Blob([ buf ], { type: mediaType });
// IE does not support setting a data URI on an a element // IE does not support setting a data URI on an a element
// Convert dataURI to a Blob and use msSaveBlob to download // Using msSaveBlob to download
if (window.Blob && navigator.msSaveBlob) { if (window.Blob && navigator.msSaveBlob) {
$attachmentLink.off('click').on('click', function () { $attachmentLink.off('click').on('click', function () {
// data URI format: data:[<mediaType>][;base64],<data>
// position in data URI string of where data begins
const base64Start = attachmentData.indexOf(',') + 1;
// position in data URI string of where mediaType ends
const mediaTypeEnd = attachmentData.indexOf(';');
// extract mediaType
const mediaType = attachmentData.substring(5, mediaTypeEnd);
// extract data and convert to binary
const decodedData = atob(attachmentData.substring(base64Start));
// Transform into a Blob
const buf = new Uint8Array(decodedData.length);
for (let i = 0; i < decodedData.length; ++i) {
buf[i] = decodedData.charCodeAt(i);
}
const blob = new window.Blob([ buf ], { type: mediaType });
navigator.msSaveBlob(blob, fileName); navigator.msSaveBlob(blob, fileName);
}); });
} else { } else {
$attachmentLink.attr('href', attachmentData); $attachmentLink.attr('href', window.URL.createObjectURL(blob));
} }
if (typeof fileName !== 'undefined') { if (typeof fileName !== 'undefined') {