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CentOS 7.0 - man page for lwp::simple (centos section 3)

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" 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 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, $modified_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 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/#.##" 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 "Prototype
       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 v5.16.3				    2012-02-18				   LWP::Simple(3)


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