Manual Reference Pages - NET::CLI::INTERACT::TRANSPORT::BASE (3)
Net::CLI::Interact::Transport::Base - Spawns an Interactive CLI Session
This module provides a generic cross-platform API with the purpose of
interacting with a command line interface.
On Windows the IPC::Run module is used and on Unix when IO::Pty is
available (it requires a compiler) Net::Telnet, else IPC::Run. In all
cases, a program such as openssh is started and methods provided to send and
receive data from the interactive session.
You should not use this class directly, but instead inherit from it in
specific Transport that will set the application command line name, and
marshall any runtime options. The OS platform is detected automatically.
This method must be called before any other, to bootstrap the application
wrapper module (IPC::Run or Net::Telnet). However, via Net::CLI::Interacts
cmd, match or find_prompt it will be called for you automatically.
Two attributes of the specific loaded Transport are used. First the
Application set in app is of course required, plus the options in the
Transports runtime_options are retrieved, if set, and passed as command
line arguments to the Application.
Returns True if connect has been called successfully, otherwise returns
Undefines the application wrapper flushes any output data buffer such that
the next call to cmd or macro will cause a new connection to be made.
Useful if you intentionally timeout a command and end up with junk in the
When passed a Net::CLI::Interact::Action instance, will execute the
contained instruction on the connected CLI. This might be a command to
send, or a regular expression to match in the output.
Features of the commands and prompts are supported, such as Continuation
matching (and slurping), and sending without an output record separator.
On failing to succeed with a Match, the module will time-out (see timeout,
below) and raise an exception.
Output returned after issuing a command is stored within the Match Actions
response and response_stash slots by this method, with the latter then
marshalled into the correct send Action by the
put( CW@data )
Items in @data are joined together by an empty string and sent as input to
the connected programs interactive session.
Attempts to retrieve pending output from the connected programs interactive
session. Returns true if there is new data available in the buffer, else
will time-out and raise a Perl exception. See buffer and timeout.
Empties the buffer used for response data returned from the connected CLI, and
returns that data as a single text string (possibly with embedded newlines).
timeout( CW$seconds? )
When do_action is polling for response data matching a regular expression
Action, it will eventually time-out and throw an exception if nothing matches
and no more data arrives.
The number of seconds to wait is set via this method, which will also return
the current value of timeout. The default value is 10 seconds.
Returns the Regular Expression reference used to split lines of reponse from
the connected device. In the end, you will only receive data from this module
separated by the ors value (by default a newline character). The irs_re
is used internally by the module and is:
qr/(?:\015\012|\015|\012)/ # i.e. CRLF or CR or LF
Line separator character(s) appended to a command sent to the connected CLI.
This defaults to a newline on the applications platform.
Slot for storing a reference to the applications
Returns true if the current platform is Windows. Can be called as either a
class or instance method.
Location and name of the program used to establish an interactive CLI session.
On Unix platforms this will be ssh (openssh), telnet, or cu (serial
line). On Windows this must be the plink.exe program.
Slot for storing a set of options for the specific loaded Transport, passed by
the user of Net::CLI::Interact as a hash ref. Do not access this directly, but
instead use runtime_options from the specific Transport class.
Slot for storing the application wrapper instance (IPC::Run or Net::Telnet).
Do not mess with this unless you know what you are doing.
After pump returns successfully, the output most recently received is
stored in this slot. Do not access this directly, but instead use the flush
During long sections of output, this slot allows more efficient detection of
matches. Older data is placed here, and only the most recent line of data is
stored in the buffer. Thats why flush is the only way to ensure you get
all the output data in one go.
<B>FIXMEB>: On Unix, when the Telnet transport is selected but IP::Pty is
unavailable, Net::Telnet can still be used, but currently IPC::Run is
Oliver Gorwits <email@example.com>
COPYRIGHT AND LICENSE
This software is copyright (c) 2014 by Oliver Gorwits.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
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