如何在使用sftp上传文件时修复PHP curl错误CURLE_SSH（79）

Question

I'm trying to reproduce the following command to upload a file via sftp on my PHP app:

curl -T /var/repo/file -u user:password sftp://server.com/folder/

The above commands works just fine (I had to recompile libcurl on my ubuntu box in order to make it work, though). However, when I tried to use PHP's curl library, things didn't go so well for me.

The code I'm using is the following:

$ch = curl_init();
$localfile = 'file';
$fp = fopen($localfile, 'r');

curl_setopt($ch, CURLOPT_URL, 'sftp://server.com/folder/');
curl_setopt($ch, CURLOPT_UPLOAD, 1);
curl_setopt($ch, CURLOPT_USERPWD, 'user:password');
curl_setopt($ch, CURLOPT_PROTOCOLS, CURLPROTO_SFTP);
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_exec ($ch);
$error_no = curl_errno($ch);
curl_close ($ch);

if ($error_no == 0) {
    $error = 'File uploaded succesfully.';
} else {
    $error = 'File upload error.';
}
echo $error.' '.$error_no;

This gives back error 79: CURLE_SSH (79) which I dont know how to fix. Have you faced this problem? How did you fix it? Any ideas?

Thanks!

Answer 1

It means libcurl got some kind of error from the "SSH layer" (libssh2). If you enable VERBOSE you might see further details.

You're using fairly old libcurl and libssh2 versions so it is not unthinkable that you can fix this problem simply by upgrading those to modern versions.