mirror of
https://github.com/restic/restic.git
synced 2024-07-19 11:17:31 +02:00
49 lines
1.7 KiB
Markdown
49 lines
1.7 KiB
Markdown
|
# Request Based SFTP API
|
||
|
|
|
||
|
|
The request based API allows for custom backends in a way similar to the http
|
||
|
|
package. In order to create a backend you need to implement 4 handler
|
||
|
|
interfaces; one for reading, one for writing, one for misc commands and one for
|
||
|
|
listing files. Each has 1 required method and in each case those methods take
|
||
|
|
the Request as the only parameter and they each return something different.
|
||
|
|
These 4 interfaces are enough to handle all the SFTP traffic in a simplified
|
||
|
|
manner.
|
||
|
|
|
||
|
|
The Request structure has 5 public fields which you will deal with.
|
||
|
|
|
||
|
|
- Method (string) - string name of incoming call
|
||
|
|
- Filepath (string) - path of file to act on
|
||
|
|
- Attrs ([]byte) - byte string of file attribute data
|
||
|
|
- Target (string) - target path for renames and sym-links
|
||
|
|
|
||
|
|
Below are the methods and a brief description of what they need to do.
|
||
|
|
|
||
|
|
### Fileread(*Request) (io.Reader, error)
|
||
|
|
|
||
|
|
Handler for "Get" method and returns an io.Reader for the file which the server
|
||
|
|
then sends to the client.
|
||
|
|
|
||
|
|
### Filewrite(*Request) (io.Writer, error)
|
||
|
|
|
||
|
|
Handler for "Put" method and returns an io.Writer for the file which the server
|
||
|
|
then writes the uploaded file to.
|
||
|
|
|
||
|
|
### Filecmd(*Request) error
|
||
|
|
|
||
|
|
Handles "SetStat", "Rename", "Rmdir", "Mkdir" and "Symlink" methods. Makes the
|
||
|
|
appropriate changes and returns nil for success or an filesystem like error
|
||
|
|
(eg. os.ErrNotExist).
|
||
|
|
|
||
|
|
### Fileinfo(*Request) ([]os.FileInfo, error)
|
||
|
|
|
||
|
|
Handles "List", "Stat", "Readlink" methods. Gathers/creates FileInfo structs
|
||
|
|
with the data on the files and returns in a list (list of 1 for Stat and
|
||
|
|
Readlink).
|
||
|
|
|
||
|
|
|
||
|
|
## TODO
|
||
|
|
|
||
|
|
- Add support for API users to see trace/debugging info of what is going on
|
||
|
|
inside SFTP server.
|
||
|
|
- Consider adding support for SFTP file append only mode.
|
||
|
|
|