lwp::simple(3)
NAME
get, head, getprint, getstore, mirror - Procedural LWP
interface
SYNOPSIS
perl -MLWP::Simple -e 'getprint "http://www.sn.no"'
use LWP::Simple;
$content = get("http://www.sn.no/")
if (mirror("http://www.sn.no/", "foo") == RC_NOT_MODIFIED) {
...
}
if (is_success(getprint("http://www.sn.no/"))) {
...
}
DESCRIPTION
This interface is intended for those who want a simplified
view of the libwww-perl library. It should also be suit
able for one-liners. If you need more control or access
to the header fields in the requests sent and responses
received you should use the full object oriented interface
provided by the "LWP::UserAgent" module.
The following functions are provided (and exported) by
this module:
- get($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: ($content_type, $document_length, $modi
fied_time, $expires, $server) - Returns an empty list if it fails. In scalar context
returns TRUE if successful. - getprint($url)
- Get and print a document identified by a URL. The docu
ment is printed to 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, $file)
- Get and store a document identified by a URL, using Ifmodified-since, and checking the Content-Length. Returns the HTTP response code.
- This module also exports the HTTP::Status constants and
procedures. These can be used when you check the response
code from getprint(), getstore() and mirror(). The con stants are:
RC_CONTINUE
RC_SWITCHING_PROTOCOLS
RC_OK
RC_CREATED
RC_ACCEPTED
RC_NON_AUTHORITATIVE_INFORMATION
RC_NO_CONTENT
RC_RESET_CONTENT
RC_PARTIAL_CONTENT
RC_MULTIPLE_CHOICES
RC_MOVED_PERMANENTLY
RC_MOVED_TEMPORARILY
RC_SEE_OTHER
RC_NOT_MODIFIED
RC_USE_PROXY
RC_BAD_REQUEST
RC_UNAUTHORIZED
RC_PAYMENT_REQUIRED
RC_FORBIDDEN
RC_NOT_FOUND
RC_METHOD_NOT_ALLOWED
RC_NOT_ACCEPTABLE
RC_PROXY_AUTHENTICATION_REQUIRED
RC_REQUEST_TIMEOUT
RC_CONFLICT
RC_GONE
RC_LENGTH_REQUIRED
RC_PRECONDITION_FAILED
RC_REQUEST_ENTITY_TOO_LARGE
RC_REQUEST_URI_TOO_LARGE
RC_UNSUPPORTED_MEDIA_TYPE
RC_INTERNAL_SERVER_ERROR
RC_NOT_IMPLEMENTED
RC_BAD_GATEWAY
RC_SERVICE_UNAVAILABLE
RC_GATEWAY_TIMEOUT
RC_HTTP_VERSION_NOT_SUPPORTED- The HTTP::Status classification functions are:
- is_success($rc)
- True if response code indicated a successful request.
- is_error($rc)
- True if response code indicated that an error occured.
- 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).
SEE ALSO
- LWP, LWP::UserAgent, HTTP::Status, lwp-request, lwp-mirror