NAME

App::BrowserUtils - Utilities related to browsers, particularly modern GUI ones

VERSION

This document describes version 0.010 of App::BrowserUtils (from Perl distribution App-BrowserUtils), released on 2020-08-18.

SYNOPSIS

DESCRIPTION

This distribution includes several utilities related to browsers:

Supported browsers: Firefox on Linux, Opera on Linux, Chrome on Linux, and Vivaldi on Linux.

FUNCTIONS

browsers_are_paused

Usage:

 browsers_are_paused(%args) -> [status, msg, payload, meta]

Check whether browsers are paused.

Browser is defined as paused if all of its processes are in 'stop' state.

This function is not exported.

Arguments ('*' denotes required arguments):

  • quiet => true

  • users => array[unix::local_uid]

    Kill browser processes that belong to certain user(s) only.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

pause_browsers

Usage:

 pause_browsers(%args) -> [status, msg, payload, meta]

Pause (kill -STOP) browsers.

A modern browser now runs complex web pages and applications. Despite browser's power management feature, these pages/tabs on the browser often still eat considerable CPU cycles even though they only run in the background. Stopping (kill -STOP) the browser processes is a simple and effective way to stop CPU eating on Unix. It can be performed whenever you are not using your browser for a little while, e.g. when you are typing on an editor or watching a movie. When you want to use your browser again, simply unpause it.

This function is not exported.

Arguments ('*' denotes required arguments):

  • users => array[unix::local_uid]

    Kill browser processes that belong to certain user(s) only.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

ps_browsers

Usage:

 ps_browsers(%args) -> [status, msg, payload, meta]

List browser processes.

This function is not exported.

Arguments ('*' denotes required arguments):

  • users => array[unix::local_uid]

    Kill browser processes that belong to certain user(s) only.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

restart_browsers

Usage:

 restart_browsers(%args) -> [status, msg, payload, meta]

Restart browsers.

For each of the requested browser, first check whether browser processes (that run the current user) exist. If they do then terminate the browser first. After that, start the browser again.

Example on the CLI:

 % restart-browsers --restart-firefox

To customize command:

 % restart-browsers --start-firefox --firefox-cmd 'firefox -P myprofile'

when starting each browser, console output will be captured and returned in function metadata. Will wait for 2/5/10 seconds and check if the browsers have been started. If all browsers can't be started, will return 500; otherwise will return 200 but report the browsers that failed to start to the STDERR.

This function is not exported.

This function supports dry-run operation.

Arguments ('*' denotes required arguments):

  • chrome_cmd => array[str]|str (default: "google-chrome")

  • firefox_cmd => array[str]|str (default: "firefox")

  • opera_cmd => array[str]|str (default: "opera")

  • quiet => true

  • restart_chrome => bool

  • restart_firefox => bool

  • restart_opera => bool

  • restart_vivaldi => bool

  • vivaldi_cmd => array[str]|str (default: "vivaldi")

Special arguments:

  • -dry_run => bool

    Pass -dry_run=>1 to enable simulation mode.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

start_browsers

Usage:

 start_browsers(%args) -> [status, msg, payload, meta]

Start browsers.

For each of the requested browser, check whether browser processes (that run as the current user) exist and if not then start the browser. If browser processes exist, even if all are paused, then no new instance of the browser will be started.

when starting each browser, console output will be captured and returned in function metadata. Will wait for 2/5/10 seconds and check if the browsers have been started. If all browsers can't be started, will return 500; otherwise will return 200 but report the browsers that failed to start to the STDERR.

Example on the CLI:

 % start-browsers --start-firefox

To customize command to use to start:

 % start-browsers --start-firefox --firefox-cmd 'firefox -P myprofile'

This function is not exported.

This function supports dry-run operation.

Arguments ('*' denotes required arguments):

  • chrome_cmd => array[str]|str (default: "google-chrome")

  • firefox_cmd => array[str]|str (default: "firefox")

  • opera_cmd => array[str]|str (default: "opera")

  • quiet => true

  • start_chrome => bool

  • start_firefox => bool

  • start_opera => bool

  • start_vivaldi => bool

  • vivaldi_cmd => array[str]|str (default: "vivaldi")

Special arguments:

  • -dry_run => bool

    Pass -dry_run=>1 to enable simulation mode.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

terminate_browsers

Usage:

 terminate_browsers(%args) -> [status, msg, payload, meta]

Terminate (kill -KILL) browsers.

This function is not exported.

Arguments ('*' denotes required arguments):

  • users => array[unix::local_uid]

    Kill browser processes that belong to certain user(s) only.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

unpause_browsers

Usage:

 unpause_browsers(%args) -> [status, msg, payload, meta]

Unpause (resume, continue, kill -CONT) browsers.

This function is not exported.

Arguments ('*' denotes required arguments):

  • users => array[unix::local_uid]

    Kill browser processes that belong to certain user(s) only.

Returns an enveloped result (an array).

First element (status) is an integer containing HTTP status code (200 means OK, 4xx caller error, 5xx function error). Second element (msg) is a string containing error message, or 'OK' if status is 200. Third element (payload) is optional, the actual result. Fourth element (meta) is called result metadata and is optional, a hash that contains extra information.

Return value: (any)

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-BrowserUtils.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-BrowserUtils.

BUGS

Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-BrowserUtils

When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.

SEE ALSO

Utilities using this distribution: App::FirefoxUtils, App::ChromeUtils, App::OperaUtils, App::VivaldiUtils

App::BrowserOpenUtils

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

This software is copyright (c) 2020, 2019 by perlancar@cpan.org.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.