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XFA - Don't create images for unsupported mime types

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This commit is contained in:
Calixte Denizet 2021-09-13 21:49:36 +02:00
parent 064c21d360
commit 9812e35916
1 changed files with 43 additions and 0 deletions
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43
src/core/xfa/template.js
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@ -123,6 +123,30 @@ const DEFAULT_TAB_INDEX = 5000;
const HEADING_PATTERN = /^H(\d+)$/;
// Allowed mime types for images
const MIMES = new Set([
"image/gif",
"image/jpeg",
"image/jpg",
"image/pjpeg",
"image/png",
"image/apng",
"image/x-png",
"image/bmp",
"image/x-ms-bmp",
"image/tiff",
"image/tif",
]);
const IMAGES_HEADERS = [
[[0x42, 0x4d], "image/bmp"],
[[0xff, 0xd8, 0xff], "image/jpeg"],
[[0x49, 0x49, 0x2a, 0x00], "image/tiff"],
[[0x4d, 0x4d, 0x00, 0x2a], "image/tiff"],
[[0x47, 0x49, 0x46, 0x38, 0x39, 0x61], "image/gif"],
[[0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a], "image/png"],
];
function getBorderDims(node) {
if (!node || !node.border) {
return { w: 0, h: 0 };
@ -3321,6 +3345,10 @@ class Image extends StringObject {
}
[$toHTML]() {
if (this.contentType && !MIMES.has(this.contentType.toLowerCase())) {
return HTMLResult.EMPTY;
}
let buffer =
this[$globalData].images && this[$globalData].images.get(this.href);
if (!buffer && (this.href || !this[$content])) {
@ -3337,6 +3365,21 @@ class Image extends StringObject {
return HTMLResult.EMPTY;
}
if (!this.contentType) {
for (const [header, type] of IMAGES_HEADERS) {
if (
buffer.length > header.length &&
header.every((x, i) => x === buffer[i])
) {
this.contentType = type;
break;
}
}
if (!this.contentType) {
return HTMLResult.EMPTY;
}
}
// TODO: Firefox doesn't support natively tiff (and tif) format.
const blob = new Blob([buffer], { type: this.contentType });
let style;