1Net::CLI::Interact::TraUnsseprorCto:n:tBraisbeu(t3e)d PeNrelt:D:oCcLuIm:e:nItnatteiroanct::Transport::Base(3)
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6 Net::CLI::Interact::Transport::Base - Spawns an Interactive CLI Session
7
9 This module provides a generic cross-platform API with the purpose of
10 interacting with a command line interface.
11 On Windows the IPC::Run module is used and on Unix when IO::Pty is
13 available (it requires a compiler) Net::Telnet, else "IPC::Run". In all
14 cases, a program such as openssh is started and methods provided to
15 send and receive data from the interactive session.
16 You should not use this class directly, but instead inherit from it in
18 specific Transport that will set the application command line name, and
19 marshall any runtime options. The OS platform is detected
20 automatically.
21
23 init
24 This method must be called before any other, to bootstrap the
25 application wrapper module (IPC::Run or Net::Telnet). However, via
26 Net::CLI::Interact's "cmd", "match" or "find_prompt" it will be called
27 for you automatically.
28 Two attributes of the specific loaded Transport are used. First the
30 Application set in "app" is of course required, plus the options in the
31 Transport's "runtime_options" are retrieved, if set, and passed as
32 command line arguments to the Application.
33 connect_ready
35 Returns True if "connect" has been called successfully, otherwise
36 returns False.
37 disconnect
39 Undefines the application wrapper flushes any output data buffer such
40 that the next call to "cmd" or "macro" will cause a new connection to
41 be made. Useful if you intentionally timeout a command and end up with
42 junk in the output buffer.
43 do_action
45 When passed a Net::CLI::Interact::Action instance, will execute the
46 contained instruction on the connected CLI. This might be a command to
47 "send", or a regular expression to "match" in the output.
48 Features of the commands and prompts are supported, such as
50 Continuation matching (and slurping), and sending without an output
51 record separator.
52 On failing to succeed with a Match, the module will time-out (see
54 "timeout", below) and raise an exception.
55 Output returned after issuing a command is stored within the Match
57 Action's "response" and "response_stash" slots by this method, with the
58 latter then marshalled into the correct "send" Action by the ActionSet.
59 put( @data )
61 Items in @data are joined together by an empty string and sent as input
62 to the connected program's interactive session.
63 pump
65 Attempts to retrieve pending output from the connected program's
66 interactive session. Returns true if there is new data available in the
67 buffer, else will time-out and raise a Perl exception. See "buffer" and
68 "timeout".
69 flush
71 Empties the buffer used for response data returned from the connected
72 CLI, and returns that data as a single text string (possibly with
73 embedded newlines).
74 timeout( $seconds? )
76 When "do_action" is polling for response data matching a regular
77 expression Action, it will eventually time-out and throw an exception
78 if nothing matches and no more data arrives.
79 The number of seconds to wait is set via this method, which will also
81 return the current value of "timeout". The default value is 10 seconds.
82 irs_re
84 Returns the Regular Expression reference used to split lines of
85 response from the connected device. In the end, you will only receive
86 data from this module separated by the "ors" value (by default a
87 newline character). The "irs_re" is used internally by the module and
88 is:
89 qr/(?:\015\012|\015|\012)/ # i.e. CRLF or CR or LF
91 ors
93 Line separator character(s) appended to a command sent to the connected
94 CLI. This defaults to a newline on the application's platform.
95 logger
97 Slot for storing a reference to the application's Logger object.
98 is_win32
100 Returns true if the current platform is Windows. Can be called as
101 either a class or instance method.
102 app
104 Location and name of the program used to establish an interactive CLI
105 session. On Unix platforms this will be "ssh" (openssh), "telnet", or
106 "cu" (serial line). On Windows this must be the "plink.exe" program.
107 connect_options
109 Slot for storing a set of options for the specific loaded Transport,
110 passed by the user of Net::CLI::Interact as a hash ref. Do not access
111 this directly, but instead use "runtime_options" from the specific
112 Transport class.
113 wrapper
115 Slot for storing the application wrapper instance (IPC::Run or
116 Net::Telnet). Do not mess with this unless you know what you are
117 doing.
118 buffer
120 After "pump" returns successfully, the output most recently received is
121 stored in this slot. Do not access this directly, but instead use the
122 "flush" method.
123 stash
125 During long sections of output, this slot allows more efficient
126 detection of matches. Older data is placed here, and only the most
127 recent line of data is stored in the "buffer". That's why "flush" is
128 the only way to ensure you get all the output data in one go.
129
131 FIXME: On Unix, when the Telnet transport is selected but "IP::Pty" is
132 unavailable, "Net::Telnet" can still be used, but currently "IPC::Run"
133 is used instead.
134perl v5.32.0 2020-07N-e2t8::CLI::Interact::Transport::Base(3)