I need to use cURL to upload some files to an SFTP server, it has to be using cURL because I'll be later using cURL_multi etc to transfer files simultaneously (unless anyone knows a command line library which supports FTP, SFTP using password, SFTP using key, and supports up to 10 simultaneous transfers).
The problem I have is cURL is running painfully slowly. Uploading using the standard SFTP client on Ubuntu 12.04, I'm getting around 70Kb/s (this is fine, that's just the speed of the server), but when using cURL, it's around 35Kb/s, half the speed of SFTP :/
Does anyone know of any ways I can speed up cURL, preferably without having to recompile cURL, but I will if I need to.
Here's the command for SFTP:
/usr/bin/sftp -oProtocol=2 -oIdentityFile=/path/to/key.pri -oPort=5000 -oStrictHostKeyChecking=no email@example.com
put filename.wav when it's connected...
and with cURL:
curl -v -u username: --key /path/to/key.pri --pubkey /path/to/key.pub -T /path/to/filename.wav sftp://thedomain.com:5000/folder/TEST/filename.wav --insecure
This is the cURL version info:
curl 7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/188.8.131.52 libidn/1.23 libssh2/1.2.8 librtmp/2.3
Protocols: dict file ftp ftps gopher http https imap imaps ldap pop3 pop3s rtmp rtsp scp sftp smtp smtps telnet tftp
Features: GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP
Surely it can't be this slow for everyone?