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RPC::XML::Parser(3pm) User Contributed Perl Documentation RPC::XML::Parser(3pm)
NAME
RPC::XML::Parser - Interface for parsers created by RPC::XML::ParserFactory
SYNOPSIS
This class is not instantiated directly; see RPC::XML::ParserFactory.
DESCRIPTION
The RPC::XML::Parser class encapsulates the interface for the parsing process. It is an
empty class that is used in conjuntion with the RPC::XML::ParserFactory class.
All parser implementations that are intended to be returned by calls to
RPC::XML::ParserFactory::new() should declare this as their parent class.
SUBROUTINES/METHODS
This class provides empty implementations for the following methods. A parser
implementation must provide definitions for both of these methods. If the versions from
this class are triggered they will throw exceptions ("die").
The descriptions below define the interface that implementations must adhere to.
new([ARGS])
Create a new instance of the class. Any extra data passed to the constructor is taken
as key/value pairs (not a hash reference) and attached to the object.
The following parameters are currently recognized:
base64_to_fh
If passed with a true value, this tells the parser that incoming Base64 data
is to be spooled to a filehandle opened onto an anonymous temporary file. The
file itself is unlinked after opening, though the resulting RPC::XML::base64
object can use its "to_file" method to save the data to a specific file at a
later point. No checks on size are made; if this option is set, all Base64
data goes to filehandles.
base64_temp_dir
If this argument is passed, the value is taken as the directory under which
the temporary files are created. This is so that the application is not locked
in to the list of directories that File::Spec defaults to with its "tmpdir"
method. If this is not passed, the previously-mentioned method is used to
derive the directory in which to create the temporary files. Only relevant if
base64_to_fh is set.
The "base64*" parameters do not have to be implemented if the user has no plans to use
the "to_file" method of the RPC::XML::base64 data-class.
As a special-case, to preserve backwards compatibility with pre-0.69 versions of this
package, new() has special behavior when specifically called for the package
RPC::XML::Parser. When called for this package, the constructor quietly loads
RPC::XML::ParserFactory and uses it to construct and return an instance of a parser
based on XML::Parser.
parse [ STRING | STREAM ]
Parse the XML document specified in either a string or a stream. The stream may be any
file descriptor, derivative of IO::Handle, etc.
The value returned must be one of the following:
RPC::XML::request instance
When passed a valid XML-RPC request message, the return value should be an
instance of the RPC::XML::request class.
RPC::XML::response instance
Likewise, when passed a valid XML-RPC response, the return value should be an
instance of the RPC::XML::response class.
string containing an error message
If the message does not conform to either a request or a response, or does not
properly parse, the return value must be a string containing the error message.
A non-blocking (push) parser instance
If no arguments are passed in, the return value must be a parser object that
implements push-parsing (non-blocking). It does not have to be of the same class
as the original object, but it must support the remaining two methods
The next two methods are only called on push-parser instances, and as such do not have to
be implemented by the actual factory-compatible parser. It is enough if the non-blocking
parser instance it returns from the no-argument call to parse() implements these:
parse_more STRING
Send a chunk of the current XML document to the parser for processing.
parse_done
Signal the end of parsing. The return value from this should be one of the same three
possibilities that the direct use of parse() (above) returns:
RPC::XML::request instance
RPC::XML::response instance
string containing an error message
parse_done() may also signal an error by throwing an exception.
DIAGNOSTICS
Unless otherwises specified, routines return the object reference itself upon a successful
operation, and an error string (which is not a blessed reference) upon error.
BUGS
Please report any bugs or feature requests to "bug-rpc-xml at rt.cpan.org", or through the
web interface at <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=RPC-XML>. I will be
notified, and then you'll automatically be notified of progress on your bug as I make
changes.
SUPPORT
o RT: CPAN's request tracker
<http://rt.cpan.org/NoAuth/Bugs.html?Dist=RPC-XML>
o AnnoCPAN: Annotated CPAN documentation
<http://annocpan.org/dist/RPC-XML>
o CPAN Ratings
<http://cpanratings.perl.org/d/RPC-XML>
o Search CPAN
<http://search.cpan.org/dist/RPC-XML>
o MetaCPAN
<https://metacpan.org/release/RPC-XML>
o Source code on GitHub
<http://github.com/rjray/rpc-xml>
LICENSE AND COPYRIGHT
This file and the code within are copyright (c) 2011 by Randy J. Ray.
Copying and distribution are permitted under the terms of the Artistic License 2.0
(<http://www.opensource.org/licenses/artistic-license-2.0.php>) or the GNU LGPL 2.1
(<http://www.opensource.org/licenses/lgpl-2.1.php>).
CREDITS
The XML-RPC standard is Copyright (c) 1998-2001, UserLand Software, Inc. See
<http://www.xmlrpc.com> for more information about the XML-RPC specification.
SEE ALSO
RPC::XML, RPC::XML::ParserFactory, RPC::XML::Parser::XMLParser
AUTHOR
Randy J. Ray <rjray AT blackperl.com>
perl v5.32.0 2021-01-10 RPC::XML::Parser(3pm)
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On Apache
Under GNU General Public License
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