Versioned File Server

#Installation 1.Download a copy using: git clone https://github.com/imran91/CS733.git

2.Change directory to : cd $GOPATH/src/github.com/imran91/CS733/Assignment1

3.Run the test script using : go test

#Command Specification

1. Write: create a file, or update the file’s contents if it already exists.
   write <filename> <numbytes> [<exptime>]\r\n
   <content bytes>\r\n
   

   The server responds with the following:
   OK <version>\r\n
   

2. Read: Given a filename, retrieve the corresponding file:
   read <filename>\r\n
   

   The server responds with the following format (or one of the errors described later)
   CONTENTS <version> <numbytes> <exptime> \r\n
   <content bytes>\r\n
   

3. Compare and swap. This replaces the old file contents with the new content provided the version is still the same.
   cas <filename> <version> <numbytes> [<exptime>]\r\n
   <content bytes>\r\n
   

   The server responds with the new version if successful
   OK <version>\r\n
   

4. Delete file
   delete <filename>\r\n
   

   The server response (if successful)
   OK\r\n

#Errors

1. ERR_VERSION <newversion>\r\n (the contents were not updated because of a version mismatch. The latest version is returned)
2. ERR_FILE_NOT_FOUND\r\n (the filename doesn’t exist)
3. ERR_CMD_ERR\r\n (the command is not formatted correctly)
4. ERR_INTERNAL\r\n (remaining errors)