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Use blob for previews

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This commit is contained in:
R4SAS 2019-06-12 05:29:19 +03:00
parent ff6b9bd8f9
commit dcbefcc1c3
1 changed files with 69 additions and 1 deletions
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70
js/privatebin.js
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@ -2547,7 +2547,8 @@ jQuery.PrivateBin = (function($, RawDeflate) {
$attachmentLink.attr('download', fileName);
}
me.handleAttachmentPreview($attachmentPreview, attachmentData);
//me.handleAttachmentPreview($attachmentPreview, attachmentData);
me.handleBlobAttachmentPreview($attachmentPreview, blobUrl, mediaType);
};
/**
@ -2819,6 +2820,73 @@ jQuery.PrivateBin = (function($, RawDeflate) {
}
};
/**
* handle the preview of files decoded to blob that can either be an image, video, audio or pdf element
*
* @name AttachmentViewer.handleBlobAttachmentPreview
* @function
* @argument {jQuery} $targetElement element where the preview should be appended
* @argument {string} file as a blob URL
* @argument {string} mime type
*/
me.handleBlobAttachmentPreview = function ($targetElement, blobUrl, mimeType) {
if (blobUrl) {
attachmentHasPreview = true;
if (mimeType.match(/image\//i)) {
$targetElement.html(
$(document.createElement('img'))
.attr('src', blobUrl)
.attr('class', 'img-thumbnail')
);
} else if (mimeType.match(/video\//i)) {
$targetElement.html(
$(document.createElement('video'))
.attr('controls', 'true')
.attr('autoplay', 'true')
.attr('class', 'img-thumbnail')
.append($(document.createElement('source'))
.attr('type', mimeType)
.attr('src', blobUrl))
);
} else if (mimeType.match(/audio\//i)) {
$targetElement.html(
$(document.createElement('audio'))
.attr('controls', 'true')
.attr('autoplay', 'true')
.append($(document.createElement('source'))
.attr('type', mimeType)
.attr('src', blobUrl))
);
} else if (mimeType.match(/\/pdf/i)) {
// PDFs are only displayed if the filesize is smaller than about 1MB (after base64 encoding).
// Bigger filesizes currently cause crashes in various browsers.
// See also: https://code.google.com/p/chromium/issues/detail?id=69227
// Firefox crashes with files that are about 1.5MB
// The performance with 1MB files is bearable
if (data.length > 1398488) {
Alert.showError('File too large, to display a preview. Please download the attachment.'); //TODO: is this error really neccessary?
return;
}
// Fallback for browsers, that don't support the vh unit
var clientHeight = $(window).height();
$targetElement.html(
$(document.createElement('embed'))
.attr('src', blobUrl)
.attr('type', 'application/pdf')
.attr('class', 'pdfPreview')
.css('height', clientHeight)
);
} else {
attachmentHasPreview = false;
}
}
};
/**
* attaches the file attachment drag & drop handler to the page
*