: How to get a github release filesize using CURL without downloading a file? For a project I need to fetch the file size of a GitHub release file using CURL without actually downloading the

For a project I need to fetch the file size of a GitHub release file using CURL without actually downloading the entire file.

$url = 'https://github.com/atom/atom/releases/download/v1.10.2/AtomSetup.exe'

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch, CURLOPT_NOBODY, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);

$data = curl_exec($ch);
$size = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);

curl_close($ch);

echo $size;
echo $data;

As I have figured out CURLOPT_NOBODY allows me to just get the size of the file (from it's header) without actually downloading the entire file. If I remove line I do get the filesize but that also downloads the entire file, and that's something I'm trying to avoid.

CURLOPT_NOBODY also replaces "GET" request with "HEAD" and I guess that's the part of the problem.

I have also tried setting up CURLOPT_USERAGENT, CURLOPT_COOKIEFILE and CURLOPT_COOKIEJAR but that didn't work out.

Any help is warm welcome!

Here is the complete CURL output:

HTTP/1.1 302 Found
Server: GitHub.com
Date: Mon, 06 Feb 2017 16:19:08 GMT
Content-Type: text/html; charset=utf-8
Status: 302 Found
Cache-Control: no-cache
Vary: X-PJAX
Location: github-cloud.s3.amazonaws.com/releases/3228505/5b5e9204-7507-11e6-8019-f5a3bc356747.exe?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIA ▶
X-UA-Compatible: IE=Edge,chrome=1
Set-Cookie: _gh_sess=eyJzZXNzaW9uX2lkIjoiNWFjZWNhZDEzMjFmMmFkNmFjOGMxOTIwNzRlNGQzNTEiLCJzcHlfcmVwbyI6ImF0b20vYXRvbSIsInNweV9yZXBvX2F0IjoxNDg2Mzk3OTQ4fQ%3D%3D--2 ▶
X-Request-Id: 4d192195dc74c4f6a056710d3fd30be9
X-Runtime: 0.120950
Content-Security-Policy: default-src 'none'; base-uri 'self'; connect-src 'self' uploads.github.com status.github.com collector.githubapp.com api.github.com www ▶
Strict-Transport-Security: max-age=31536000; includeSubdomains; preload
Public-Key-Pins: max-age=5184000; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho="; pin-sha2 ▶
X-Content-Type-Options: nosniff
X-Frame-Options: deny
X-XSS-Protection: 1; mode=block
Vary: Accept-Encoding
X-Served-By: 97b025644def4c59b05efb255b209cda
X-GitHub-Request-Id: CF4C:3E44:58EC2B1:8D98E31:5898A1FB

HTTP/1.1 403 Forbidden
x-amz-request-id: 962EAB609235815D
x-amz-id-2: 1uccfAjq9MwgFo5BUGLhFkCjCNhkQKpVnAU9s6AF0pNy0fPqnEw6Se+UOa1RESRxyAmtoZXKImw=
Content-Type: application/xml
Transfer-Encoding: chunked
Date: Mon, 06 Feb 2017 16:19:07 GMT
Server: AmazonS3