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LWP::Simple(3) User Contributed Perl Documentation LWP::Simple(3)
NAME
LWP::Simple - simple procedural interface to LWP
SYNOPSIS
perl -MLWP::Simple -e ’getprint "http://www.sn.no"’
use LWP::Simple;
$content = get("http://www.sn.no/");
die "Couldn’t get it!" unless defined $content;
if (mirror("http://www.sn.no/", "foo") == RC_NOT_MODIFIED) {
...
}
if (is_success(getprint("http://www.sn.no/"))) {
...
}
DESCRIPTION
This module is meant for people who want a simplified view of the libwww-perl
library. It should also be suitable for one-liners. If you need more control or
access to the header fields in the requests sent and responses received, then you
should use the full object-oriented interface provided by the "LWP::UserAgent" mod-
ule.
The following functions are provided (and exported) by this module:
get($url)
The get() function will fetch the document identified by the given URL and
return it. It returns "undef" if it fails. The $url argument can be either a
simple string or a reference to a URI object.
You will not be able to examine the response code or response headers (like
’Content-Type’) when you are accessing the web using this function. If you need
that information you should use the full OO interface (see LWP::UserAgent).
head($url)
Get document headers. Returns the following 5 values if successful: ($con-
tent_type, $document_length, $modified_time, $expires, $server)
Returns an empty list if it fails. In scalar context returns TRUE if success-
ful.
getprint($url)
Get and print a document identified by a URL. The document is printed to the
selected default filehandle for output (normally STDOUT) as data is received
from the network. If the request fails, then the status code and message are
printed on STDERR. The return value is the HTTP response code.
getstore($url, $file)
Gets a document identified by a URL and stores it in the file. The return value
is the HTTP response code.
mirror($url, $file)
Get and store a document identified by a URL, using If-modified-since, and
checking the Content-Length. Returns the HTTP response code.
This module also exports the HTTP::Status constants and procedures. You can use
them when you check the response code from getprint(), getstore() or mirror(). The
constants are:
RC_CONTINUE
RC_SWITCHING_PROTOCOLS
RC_OK
RC_CREATED
RC_ACCEPTED
RC_NON_AUTHORITATIVE_INFORMATION
RC_NO_CONTENT
RC_RESET_CONTENT
RC_PARTIAL_CONTENT
RC_MULTIPLE_CHOICES
RC_MOVED_PERMANENTLY
RC_MOVED_TEMPORARILY
RC_SEE_OTHER
RC_NOT_MODIFIED
RC_USE_PROXY
RC_BAD_REQUEST
RC_UNAUTHORIZED
RC_PAYMENT_REQUIRED
RC_FORBIDDEN
RC_NOT_FOUND
RC_METHOD_NOT_ALLOWED
RC_NOT_ACCEPTABLE
RC_PROXY_AUTHENTICATION_REQUIRED
RC_REQUEST_TIMEOUT
RC_CONFLICT
RC_GONE
RC_LENGTH_REQUIRED
RC_PRECONDITION_FAILED
RC_REQUEST_ENTITY_TOO_LARGE
RC_REQUEST_URI_TOO_LARGE
RC_UNSUPPORTED_MEDIA_TYPE
RC_INTERNAL_SERVER_ERROR
RC_NOT_IMPLEMENTED
RC_BAD_GATEWAY
RC_SERVICE_UNAVAILABLE
RC_GATEWAY_TIMEOUT
RC_HTTP_VERSION_NOT_SUPPORTED
The HTTP::Status classification functions are:
is_success($rc)
True if response code indicated a successful request.
is_error($rc)
True if response code indicated that an error occurred.
The module will also export the LWP::UserAgent object as $ua if you ask for it
explicitly.
The user agent created by this module will identify itself as "LWP::Simple/#.##"
(where "#.##" is the libwww-perl version number) and will initialize its proxy
defaults from the environment (by calling $ua->env_proxy).
CAVEAT
Note that if you are using both LWP::Simple and the very popular CGI.pm module, you
may be importing a "head" function from each module, producing a warning like "Pro-
totype mismatch: sub main::head ($) vs none". Get around this problem by just not
importing LWP::Simple’s "head" function, like so:
use LWP::Simple qw(!head);
use CGI qw(:standard); # then only CGI.pm defines a head()
Then if you do need LWP::Simple’s "head" function, you can just call it as
"LWP::Simple::head($url)".
SEE ALSO
LWP, lwpcook, LWP::UserAgent, HTTP::Status, lwp-request, lwp-mirror
perl v5.8.6 2004-04-06 LWP::Simple(3)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache/1.3.41 (Unix) PHP/5.2.5 mod_perl/1.30 mod_gzip/1.3.26.1a
Under GNU General Public License
2008-11-21 09:15 @38.103.63.58 CrawledBy CCBot/1.0 (+http://www.commoncrawl.org/bot.html)