FG
💻 Software🌐 Web & Full-Stack

Download zip file

Fresh3 days ago
Mar 14, 20260 views
Confidence Score55%
55%

Problem

I am looking for some help with my current issue. I am trying to download a zip file using `res.download`. My code for downloading the file is very simple [code block] bulk-output.zip is file that sits in the root of my repository. When I download this file from the browser I get the following error when unzipping the file. Any thoughts on what is wrong here? I imagine the problem is on my end but I am unable to nail down the problem.

Error Output

error when unzipping the file.

Unverified for your environment

Select your OS to check compatibility.

1 Fix

Canonical Fix
Unverified Fix
New Fix – Awaiting Verification

Fix Zip File Download Issue in Express

Medium Risk

The issue may arise from incorrect file path resolution or improper handling of the response stream in the Express application. If the file is not found or if the response is not correctly set up, the downloaded file could be corrupted, leading to errors when unzipping.

Awaiting Verification

Be the first to verify this fix

  1. 1

    Verify File Path

    Ensure that the path to 'bulk-output.zip' is correct. If the file is located in the root of your repository, use the 'path' module to resolve the absolute path.

    javascript
    const path = require('path');
const filePath = path.join(__dirname, 'bulk-output.zip');
  2. 2

    Use res.download Correctly

    Modify the download code to ensure it uses the correct file path. This will help Express locate the file correctly when sending the response.

    javascript
    res.download(filePath, 'bulk-output.zip', (err) => {
  if (err) {
    console.error('Download error:', err);
    res.status(err.status).end();
  }
});
  3. 3

    Set Proper Headers

    Ensure that the correct headers are set for the response. This can help prevent issues with file handling in the browser.

    javascript
    res.setHeader('Content-Type', 'application/zip');
res.setHeader('Content-Disposition', 'attachment; filename=bulk-output.zip');
  4. 4

    Test the Download

    After making the changes, test the download functionality in your browser. Make sure to clear the browser cache or use an incognito window to avoid cached responses.

Validation

Confirm that the downloaded zip file can be unzipped without errors. You can also check the file size to ensure it matches the original file size on the server.

Sign in to verify this fix

Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

expressnode.jsapi