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<title>SWI-Prolog 7.3.6 Reference Manual: Section A.16</title><link rel="home" href="index.html">
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<h2 id="sec:www_browser"><a id="sec:A.16"><span class="sec-nr">A.16</span> <span class="sec-title">library(www_browser):
Activating your Web-browser</span></a></h2>
<a id="sec:www_browser"></a>
<p>This library deals with the very system-dependent task of opening a
web page in a browser. See also <code>library(url)</code> and the HTTP
package.
<dl class="latex">
<dt class="pubdef"><a id="www_open_url/1"><strong>www_open_url</strong>(<var>+URL</var>)</a></dt>
<dd class="defbody">
Open <var>URL</var> in an external web browser. The reason to place this
in the library is to centralise the maintenance on this highly platform-
and browser-specific task. It distinguishes between the following cases:
<p>
<ul class="latex">
<li><i>MS-Windows</i><br>
If it detects MS-Windows it uses <a id="idx:winshell2:1958"></a><a class="pred" href="system.html#win_shell/2">win_shell/2</a>
to open the <var>URL</var>. The behaviour and browser started depends on
the version of Windows and Windows-shell configuration, but in general
it should be the behaviour expected by the user.
<p>
<li><i>Other platforms</i><br>
On other platforms it tests the environment variable (see <a id="idx:getenv2:1959"></a><a class="pred" href="system.html#getenv/2">getenv/2</a>)
named <code>BROWSER</code> or uses <b>netscape</b> if this variable is
not set. If the browser is either <code>mozilla</code> or <code>netscape</code>,
<a id="idx:wwwopenurl1:1960"></a><a class="pred" href="www_browser.html#www_open_url/1">www_open_url/1</a>
first tries to open a new window on a running browser using the <code>-remote</code>
option of Netscape. If this fails or the browser is not <code>mozilla</code>
or <code>netscape</code> the system simply passes the URL as first
argument to the program.
</ul>
</dd>
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