poppler.pdfInfo always reports 0 bytes in fileSize if PDF file is Buffer

[nhvu1988]

Prerequisites

• I have written a descriptive issue title

• I have searched existing issues to ensure it has not already been reported

• I agree to follow the Code of Conduct that this project adheres to

API/app/plugin version

5.1.5

Node.js version

16

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

20.04

Description

The poppler.pdfInfo always reports 0 bytes in fileSize if the PDF file is Buffer.

Steps to Reproduce

Add the below code to index.test.js and run to see it

test("Should list info of PDF file as Buffer as a JSON object", async () => {
	const poppler = new Poppler(testBinaryPath);
	const attachmentFile = await fs.promises.readFile(file);

	const res = await poppler.pdfInfo(attachmentFile, {
		printAsJson: true,
	});

	expect(res).toMatchObject({
		tagged: "yes",
		userProperties: "no",
		suspects: "no",
		form: "AcroForm",
		javaScript: "no",
		pages: "16",
		encrypted: "no",
		pageSize: "595.276 x 841.89 pts (A4)",
		pageRot: "0",
		fileSize: "583094 bytes",
		optimized: "no",
		pdfVersion: "1.3",
	});
});

The test reports is

  ● Node-Poppler Module › pdfInfo Function › Should list info of PDF file as Buffer as a JSON object

    expect(received).toMatchObject(expected)

    - Expected  - 1
    + Received  + 1

    @@ -1,8 +1,8 @@
      Object {
        "encrypted": "no",
    -   "fileSize": "583094 bytes",
    +   "fileSize": "0 bytes",
        "form": "AcroForm",
        "javaScript": "no",
        "optimized": "no",
        "pageRot": "0",
        "pageSize": "595.276 x 841.89 pts (A4)",

      414 |                     });
      415 |
    > 416 |                     expect(res).toMatchObject({
          |                                 ^
      417 |                             tagged: "yes",
      418 |                             userProperties: "no",
      419 |                             suspects: "no",

      at Object.toMatchObject (src/index.test.js:416:16)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 90 passed, 91 total
Snapshots:   0 total
Time:        32.347 s, estimated 33 s
Ran all test suites.

Expected Behaviour

It should report correct fileSize.

[Fdawgs]

Thanks for reporting this @nhvu1988! I'll take a look soon.