This library deals with the highly platform specific task of opening
a web page. In addition, is provides a mechanism similar to
absolute_file_name/3
that expands compound terms to concrete URLs. For example, the
SWI-Prolog home page can be opened using:
?- www_open_url(swipl(.)).
- www_open_url(+Url)
- Open URL in running version of the users’browser or start a new
browser. This predicate tries the following steps:
- If a prolog flag (see set_prolog_flag/2)
browser
is set and this is the name of a known executable, use this. The flag
may be set to Command-Mode, where mode is one of fg
or bg, requesting Command to run in foreground or
background mode. Default is bg.
- On Windows, use
win_shell(open, URL)
- Find a generic‘open’comment. Candidates are
xdg-open,
open or gnome-open.
- If a environment variable
BROWSER is set and this is
the name of a known executable, use this.
- Try to find a known browser. @tbd Figure out the right tool in step
3 as it is not uncommon that multiple are installed.
- [multifile]known_browser(+FileBaseName,
-Compatible)
- True if browser FileBaseName has a remote protocol compatible
to
Compatible.
- expand_url_path(+Spec,
-URL)
- Expand URL specifications similar to absolute_file_name/3.
The predicate url_path/2 plays the role of file_search_path/2.
- Errors
existence_error(url_path, Spec) if the location is not
defined.
