How to set a maximum size limit to PHP cURL downloads?

by

I have another answer that addresses the situation even better to leave here for posterity.

CURLOPT_WRITEFUNCTION is good for this but CURLOPT_PROGRESSFUNCTION is the best.

// We need progress updates to break the connection mid-way
curl_setopt($cURL_Handle, CURLOPT_BUFFERSIZE, 128); // more progress info
curl_setopt($cURL_Handle, CURLOPT_NOPROGRESS, false);
curl_setopt($cURL_Handle, CURLOPT_PROGRESSFUNCTION, function(
    $DownloadSize, $Downloaded, $UploadSize, $Uploaded
){
    // If $Downloaded exceeds 1KB, returning non-0 breaks the connection!
    return ($Downloaded > (1 * 1024)) ? 1 : 0;
});

Keep in mind that even if the PHP.net states^ for CURLOPT_PROGRESSFUNCTION:

A callback accepting five parameters.

My local tests have featured only four (4) parameters as the 1st (handle) is not present.

More Related Contents:

  1. How to get file_get_contents() to work with HTTPS?
  2. PHP CURL & HTTPS
  3. curl POST format for CURLOPT_POSTFIELDS
  4. How do I make an asynchronous GET request in PHP?
  5. PHP cURL custom headers
  6. Setting Curl’s Timeout in PHP
  7. Keeping session alive with Curl and PHP
  8. Save image from url with curl PHP
  9. What’s the net::ERR_HTTP2_PROTOCOL_ERROR about?
  10. How to use CURL via a proxy?
  11. Copy Image from Remote Server Over HTTP
  12. Async curl request in PHP
  13. Manually parse raw multipart/form-data data with PHP
  14. Posting raw image data as multipart/form-data in curl
  15. How to get response using cURL in PHP
  16. curl_exec() always returns false
  17. Get Element by ClassName with DOMdocument() Method
  18. SFTP from within PHP
  19. Correct way to set Bearer token with cURL
  20. Run composer with a PHP script in browser
  21. How can I send cookies using PHP curl in addition to CURLOPT_COOKIEFILE?
  22. Send XML data to webservice using php curl
  23. Is making asynchronous HTTP requests possible with PHP?
  24. Can anyone give me an example for PHP’s CURLFile class?
  25. PHP Multiple Curl Requests
  26. upload multiple files to php server using curl command line
  27. Post data and retrieve the response using PHP Curl?
  28. cURL — cookies and sessions
  29. download a file from ftp using curl and php
  30. PHP cURL: how to set body to binary data?

Leave a Comment