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sftp: fix issue with WS_FTP by working around failing RealPath

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albertony 2022-07-19 09:15:50 +02:00 committed by Nick Craig-Wood
parent f1166757ba
commit f0396070eb
1 changed files with 14 additions and 3 deletions
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17
backend/sftp/sftp.go
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@ -935,11 +935,22 @@ func NewFsWithConnection(ctx context.Context, f *Fs, name string, root string, m
// It appears that WS FTP doesn't like relative paths,
// and the openssh sftp tool also uses absolute paths.
if !path.IsAbs(f.root) {
path, err := c.sftpClient.RealPath(f.root)
// Trying RealPath first, to perform proper server-side canonicalize.
// It may fail (SSH_FX_FAILURE reported on WS FTP) and will then resort
// to simple path join with current directory from Getwd (which can work
// on WS FTP, even though it is also based on RealPath).
absRoot, err := c.sftpClient.RealPath(f.root)
if err != nil {
fs.Debugf(f, "Failed to resolve path - using relative paths: %v", err)
fs.Debugf(f, "Failed to resolve path using RealPath: %v", err)
cwd, err := c.sftpClient.Getwd()
if err != nil {
fs.Debugf(f, "Failed to to read current directory - using relative paths: %v", err)
} else {
f.absRoot = path.Join(cwd, f.root)
fs.Debugf(f, "Relative path joined with current directory to get absolute path %q", f.absRoot)
}
} else {
f.absRoot = path
f.absRoot = absRoot
fs.Debugf(f, "Relative path resolved to %q", f.absRoot)
}
}