There are some ways to check file is corrupted with node.js?

I tried many File System methods, like fs.readFile, fs.open and fs.access but all of them return ok status, and I'm sure my file is corrupted in my tests.

To be more clear, my objective is to check if PDF is readable (not only check if can be generated) and if can be opened. I damaged the file online to test.

There are some ways to check file is corrupted with node.js?

I tried many File System methods, like fs.readFile, fs.open and fs.access but all of them return ok status, and I'm sure my file is corrupted in my tests.

To be more clear, my objective is to check if PDF is readable (not only check if can be generated) and if can be opened. I damaged the file online to test.

• javascript
• node.js

• 3 First define "corrupted". "Doesn't contain what my brain things it should contain" isn't something a puter can test for. – Quentin Commented May 25, 2017 at 14:41
• I updated the question @Quentin – BrTkCa Commented May 25, 2017 at 14:46

2 Answers 2

You could try to parse it with a tool like this and confirm if it was successful.

To expand on that a little, here's some example code lifted from the link:

let fs = require('fs'),
    PDFParser = require("pdf2json");

let pdfParser = new PDFParser();

pdfParser.on("pdfParser_dataError", errData => console.error(errData.parserError) );
pdfParser.on("pdfParser_dataReady", pdfData => {
    fs.writeFile("./pdf2json/test/F1040EZ.json", JSON.stringify(pdfData));
});

pdfParser.loadPDF("./pdf2json/test/pdf/fd/form/F1040EZ.pdf");

Actually, u can use another npm to check file corruption of pdf.

npm i pdf-parse

const pdfParser = require('pdf-parse')
try {
  let bufferData = fs.readFileSync(`${target}/corrupted.pdf`)
  pdfParser(bufferData).then((data) => {
    // do something with data
  }).catch((error) => {
    console.log(error.message)
  })
} catch (error) {
  console.log(error)
}

For corrupted file the error might seem like:
Warning: Indexing all PDF objects
Invalid PDF structure