How to modify LXR library source

[AlexPham]

Hi.

I have LXR install at $lxr_root

and LXR libraries are located at $lxr_root/lib/LXR

For example:

In $lxr_root/lib/LXR/Markup.pm , we have this condition when LXR trying to open a graphic file;

*

} elsif ($pathname =~ m/\.($graphic)$/) {
    # Graphic files are detected by their extension
        &$outfun('<b>Image: </b>');
        &$outfun('<img src="'
                . $config->{'sourceaccess'}
                . '/' . $config->variable('v')
                . $pathname
                . '" border="0"'
                . " alt=\"**No access to $pathname or browser cannot display this format\">");***

Now if I wanna change the message , to "We can not open $pathname".

I modified Markup.pm code like:

" alt=\"We can not open $pathname">");*

and F5 the page, but it not work.

Could you please guide me how to make changes in $lxr_root/lib/LXR/$lib.pm to take affect.

Thank you so much.

Alex

[Andre-Littoz]

Hi,

Unless you made a mistake while copying your modified line, a reverse slash is missing. The line should read:

" alt=\"We can not open $pathname\">");

i.e. the double quote before > must be escaped; otherwise the string is closed before >, > is considered a comparison operator and a new string opens with ); and terminates somewhere in subsequent lines.

All that results in a Perl syntax error, which you could confirm by displaying the web-server error log.

André

[AlexPham]

Hi

The original sentence is look like this:

. " alt=\"No access to $pathname or browser cannot display this format\">");

Even if I just add a word in the middle , just like:

. " alt=\"No access or permission to $pathname or browser cannot display this format\">");

It still not work.

Thank you.

Alex

[Andre-Littoz]

Well, modifying a live Perl script, i.e. one the web server has already interpreted and the browser already seen, is not that easy because it may reside in one cache or another.

Force the web server to recompile the modified script. The simplest way is to restart the server. For Apache, command is apachectl restart or apache2ctl restart depending on distribution. You may also use (Linux commands):

systemctl restart apache.service    # for Apache
systemctl restart lighttpd.service  # for lighttpd

Empty your browser cache so that the browser does not use a stale page. The procedure depends on the browser. For Firefox, menu Edit->Preferences, then Advanced tab and click the appropriate button.

After these steps, reload the page.

A symptom for out-of-balance behaviour (for browser+server) can be found in the browser error log: an error like page xxx did not send HTTP headers is an indication of a stale script.

Does that help?

[AlexPham]

Hi.

It worked.

Thank you for your help.

Alex