SFTP example or documentation

[Mathew Simon]

Hi,

Are there any example or documentation available on how to use LIBCURL
to implement a SFTP session either to upload or download a file or to
get a directory listing. I tried to use the curleasy with a URL of
sftp://..... I am able to make an initial connection to the SFTP server,
but it aborts due to some reason. The verbose output I got is quoted
below and it doesn't mean much.

Text: About to connect() to qa-ftp.xxx.com port 9922 (#0)
Text: Trying 66.xxx.xxx.43...
Text: connected
Text: Connected to qa-ftp.xxx.com (66.xxx.xxx.43) port 9922 (#0)
Text: Closing connection #0
Text: Error in the SSH layer

How do I get more info on the problem or other debugging info on the SSH
part? I am using the August-18 snapshot for both LIBCURL and LIBSSH2. I
used the following "setopts".

url = "sftp://qa-ftp.xxx.com";
curl_easy_setopt(pCurl->mpCurl, CURLOPT_URL, url);
curl_easy_setopt(pCurl->mpCurl, CURLOPT_USERPWD, FtpUserPasswd.c_str());
curl_easy_setopt(pCurl->mpCurl, CURLOPT_PORT, 9922);
curl_easy_setopt(pCurl->mpCurl, CURLOPT_SSH_AUTH_TYPES,
CURLSSH_AUTH_PASSWORD);

Using a SFTP client program like "WinSCP", I am able to connect to that
server and hence I know that my user-ID and password work and that my
Win-XP machine, which is behind a firewall, can successfully connect to
that Server of a major company.

Thanks,
Mathew Simon

[Andre Guibert de Bruet]

Post by Mathew Simon
Are there any example or documentation available on how to use LIBCURL
to implement a SFTP session either to upload or download a file or to
get a directory listing. I tried to use the curleasy with a URL of
sftp://..... I am able to make an initial connection to the SFTP server,
but it aborts due to some reason. The verbose output I got is quoted
below and it doesn't mean much.

I do not know of one. Then again, I have not looked at the libcurl
docs or google'd for one in a while.

Post by Mathew Simon
Text: About to connect() to qa-ftp.xxx.com port 9922 (#0)
Text: Trying 66.xxx.xxx.43...
Text: connected
Text: Connected to qa-ftp.xxx.com (66.xxx.xxx.43) port 9922 (#0)
Text: Closing connection #0
Text: Error in the SSH layer

When debugging ssh-related problems, I find that running sshd with
the -d flag gives a good idea of why a connection attempt is failing
(Or succeeding!). If you need more verbose output, give it another -
d. Running with 3 -d flags is not recommended unless you are running
under script(1) or logging the output via some other mechanism, as it
produces TONS of output.

Post by Mathew Simon
How do I get more info on the problem or other debugging info on the SSH
part? I am using the August-18 snapshot for both LIBCURL and
LIBSSH2. I
used the following "setopts".
url = "sftp://qa-ftp.xxx.com";
curl_easy_setopt(pCurl->mpCurl, CURLOPT_URL, url);
curl_easy_setopt(pCurl->mpCurl, CURLOPT_USERPWD, FtpUserPasswd.c_str
());
curl_easy_setopt(pCurl->mpCurl, CURLOPT_PORT, 9922);
curl_easy_setopt(pCurl->mpCurl, CURLOPT_SSH_AUTH_TYPES,
CURLSSH_AUTH_PASSWORD);
Using a SFTP client program like "WinSCP", I am able to connect to that
server and hence I know that my user-ID and password work and that my
Win-XP machine, which is behind a firewall, can successfully
connect to
that Server of a major company.

This would validate that the sshd is sane. Give sshd the -d flag(s).

Cheers,

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[Daniel Stenberg]

Are there any example or documentation available on how to use LIBCURL to
implement a SFTP session either to upload or download a file or to get a
directory listing.

I don't think we have any examples for the SSH protocols just yet, but they
should work pretty much the same way you use other protocols... The
documentation is there though.

We will appreciate all fine examples and howtos people submit!