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Next File Transfer Protocol
===========================
Introduction
------------
Next File Transfer uses a simple protocol where a single character defines
a message type.
The following are standard compents of a message:
> <NNNNN> 5 ASCII digits making up a zero-padded number.
> <N bytes> A stream of N bytes.
Put File
--------
The format of the message from the client is:
> A Put file command
> <NNNNN> Length of filename
> <N bytes> The filename
> <NNNNN> Length of the data for the file.
> <N bytes> The data.
The server responds with either:
> OK The command completed OK
or:
> !E There was an error writing the file.
Get File
--------
The format of the message from the client is:
> B Put file command
> <NNNNN> Length of filename
> <N bytes> The filename
The server responds with either:
> OK The command completed OK. The file contents will follow.
> <NNNNN> The length of the following data.
> <N bytes> The data frin from the file.
or:
> !E There was an error reading the file.
Change Directory
----------------
The format of the message from the client is:
> C Change directory command
> NNNNN Length of pathname
> <N bytes> The pathname
The server responds with either:
> OK The command completed OK
or:
> !E There was an error changing to the directory
Create Directory
----------------
The format of the message from the client is:
> D Create directory command
> NNNNN Length of pathname
> <N bytes> The pathname
The server responds with either:
> OK The command completed OK
or:
> !E There was an error creating the directory
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