Class: HrrRbSftp::Protocol::Version1::Packets::SSH_FXP_READ

Inherits:
Packet show all
Defined in:
lib/hrr_rb_sftp/protocol/version1/packets/005_ssh_fxp_read.rb

Overview

This class implements SFTP protocol version 1 SSH_FXP_READ packet type, format, and responder.

Constant Summary collapse

TYPE =

Represents SSH_FXP_READ packet type.

5
FORMAT =

Represents SSH_FXP_READ packet format.

[
  [DataTypes::Byte,   :"type"      ],
  [DataTypes::Uint32, :"request-id"],
  [DataTypes::String, :"handle"    ],
  [DataTypes::Uint64, :"offset"    ],
  [DataTypes::Uint32, :"len"       ],
]

Instance Attribute Summary

Attributes included from Loggable

#logger

Instance Method Summary collapse

Methods inherited from Packet

#context, #handles, #initialize, #version

Methods inherited from Common::Packets::Packet

#decode, #encode, #initialize

Methods included from Loggable

#log_debug, #log_error, #log_fatal, #log_info, #log_warn

Constructor Details

This class inherits a constructor from HrrRbSftp::Protocol::Version1::Packets::Packet

Instance Method Details

#respond_to(request) ⇒ Hash{Symbol=>Object}

Responds to SSH_FXP_READ request.

Parameters:

  • request (Hash{Symbol=>Object}) —

    SSH_FXP_READ request represented in Hash.

Returns:

  • (Hash{Symbol=>Object}) —

    Response represented in Hash. In case of success, its type is SSH_FXP_DATA. In other cases, its type is SSH_FXP_STATUS.



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# File 'lib/hrr_rb_sftp/protocol/version1/packets/005_ssh_fxp_read.rb', line 33

def respond_to request
  begin
    raise "Specified handle does not exist" unless handles.has_key?(request[:"handle"])
    log_debug { "file = handles[#{request[:"handle"].inspect}]" }
    file = handles[request[:"handle"]]
    log_debug { "file.pos = #{request[:"offset"].inspect}" }
    file.pos = request[:"offset"]
    unless file.eof?
      log_debug { "data = file.read(#{request[:"len"].inspect})" }
      data = file.read(request[:"len"])
      {
        :"type"          => SSH_FXP_DATA::TYPE,
        :"request-id"    => request[:"request-id"],
        :"data"          => data,
      }
    else
      {
        :"type"          => SSH_FXP_STATUS::TYPE,
        :"request-id"    => request[:"request-id"],
        :"code"          => SSH_FXP_STATUS::SSH_FX_EOF,
        :"error message" => "End of file",
        :"language tag"  => "",
      }
    end
  rescue => e
    log_error { [e.backtrace[0], ": ", e.message, " (", e.class.to_s, ")\n\t", e.backtrace[1..-1].join("\n\t")].join }
    {
      :"type"          => SSH_FXP_STATUS::TYPE,
      :"request-id"    => request[:"request-id"],
      :"code"          => SSH_FXP_STATUS::SSH_FX_FAILURE,
      :"error message" => e.message,
      :"language tag"  => "",
    }
  end
end