I would like to run script as a cronjob and only get the image if it has been updated.
Honing in on this, I'd say a better bet is to use LWP::Simple's mirror method:
use LWP::Simple qw(mirror);
my $result = mirror("http://host.example.com/url/foo.jpg", "localfile.
+jpg");
if ($result == 304) {
print "no update needed\n":
} elsif ($result = 200) {
print "New image has arrived!\n";
} else {
die "Bad mirror status: $result\n";
}
This is presuming that the image is either a static file, updated from time to time, or that the image is dynamically generated but with a proper handling of "if-modified-since".
Using mirror with a proper webserver guarantees minimal web traffic. I use it to mirror web pages and images a lot. I've even written a few columns using it. {grin}
-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|