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Move the EXIF-block replacement into JpegStream (PR 19356 follow-up)

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Currently we modify the EXIF-block in place, which may end up "breaking" the JPEG-data of the original PDF document since e.g. saving it from the viewer no longer contains the real EXIF-block.
Hence the EXIF-block replacement is moved into the `JpegStream` class, such that we can copy the data before doing the replacement.
This commit is contained in:
Jonas Jenwald 2025-02-20 12:36:25 +01:00
parent 63b397f49d
commit d5ce35f744
3 changed files with 54 additions and 12 deletions
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23
test/unit/api_spec.js
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@ -2235,6 +2235,29 @@ describe("api", function () {
expect(data.length).toEqual(basicApiFileLength);
});
it("gets data from PDF document with JPEG image containing EXIF-data (bug 1942064)", async function () {
const typedArrayPdf = await DefaultFileReaderFactory.fetch({
path: TEST_PDFS_PATH + "bug1942064.pdf",
});
// Sanity check to make sure that we fetched the entire PDF file.
expect(typedArrayPdf instanceof Uint8Array).toEqual(true);
expect(typedArrayPdf.length).toEqual(10719);
const loadingTask = getDocument(typedArrayPdf.slice());
const pdfDoc = await loadingTask.promise;
const page = await pdfDoc.getPage(1);
// Trigger parsing of the JPEG image.
await page.getOperatorList();
const data = await pdfDoc.getData();
expect(data instanceof Uint8Array).toEqual(true);
// Ensure that the EXIF-block wasn't modified.
expect(typedArrayPdf).toEqual(data);
await loadingTask.destroy();
});
it("gets download info", async function () {
const downloadInfo = await pdfDocument.getDownloadInfo();
expect(downloadInfo).toEqual({ length: basicApiFileLength });