|--help||Prints a short summary of the options.|
|--name=STRING||Specifies the published name of the method being encoded. This is the name by which it will be visible to clients of the server.|
|--namespace=STRING||Specifies a namespace that the code of the method will be evaluated in, when the XPL file is loaded by a server instance.|
|--type=STRING||Specify the type for the resulting file. Type here refers to whether the container tag used in the resulting XML will specify a <B>procedureB> or a <B>methodB>. The default is <B>methodB>. The string is treated case-independant, and only the first character (m or p) is actually regarded.|
|--version=STRING||Specify a version stamp for the code routine.|
|--hidden||If this is passe, the resulting file will include a tag that tells the server daemon to not make the routine visible through any introspection interfaces.|
|--signature=STRING [ --signature=STRING ... ]||Specify one or more signatures for the method. Signatures should be the type names as laid out in the documentation in RPC::XML, with the elements separated by a colon. You may also separate them with spaces, if you quote the argument. This option may be specified more than once, as some methods may have several signatures.|
|--helptext=STRING||Specify the help text for the method as a simple string on the command line. Not suited for terribly long help strings.|
|--helpfile=FILE||Read the help text for the method from the file specified.|
|--code=FILE||Read the actual code for the routine from the file specified. If this option is not given, the code is read from the standard input file descriptor.|
|--output=FILE||Write the resulting XML representation to the specified file. If this option is not given, then the output goes to the standard output file descriptor.|
This is a special, all-in-one option. If passed, all other options are
The value is used as the base element for reading information from a file named <B>BASEB>.base. This file will contain specification of the name, version, hidden status, signatures and other method information. Each line of the file should look like one of the following:
Any other lines than the above patterns are ignored.
If no code has been read, then the tool will exit with an error message.
The file format for these published routines is a very simple XML dialect. This is less due to XML being an ideal format than it is the availability of the parser, given that the <B>RPC::XML::ServerB> class will already have the parser code in core. Writing a completely new format would not have gained anything.
The Document Type Declaration for the format can be summarized by:
<!ELEMENT proceduredef (name, namespace?, version?, hidden?, signature+, help?, code)> <!ELEMENT methoddef (name, namespace?, version?, hidden?, signature+, help?, code)> <!ELEMENT functiondef (name, namespace?, version?, hidden?, signature+, help?, code)> <!ELEMENT name (#PCDATA)> <!ELEMENT namespace (#PCDATA)> <!ELEMENT version (#PCDATA)> <!ELEMENT hidden EMPTY> <!ELEMENT signature (#PCDATA)> <!ELEMENT help (#PCDATA)> <!ELEMENT code (#PCDATA)> <!ATTLIST code language (#PCDATA)>
The file rpc-method.dtd that comes with the distribution has some commentary in addition to the actual specification.
A file is (for now) limited to one definition. This is started by the one of the opening tags <methoddef>, <functiondef> or <proceduredef>. This is followed by exactly one <name> container specifying the method name, an optional version stamp, an optional hide-from-introspection flag, one or more <signature> containers specifying signatures, an optional <help> container with the help text, then the <code> container with the actual program code. All text should use entity encoding for the symbols:
& C<&> (ampersand) E<lt> C<<> (less-than) E<gt> C<>> (greater-than)
The parsing process within the server class will decode the entities. To make things easier, the tool scans all text elements and encodes the above entities before writing the file.
This is not Programming 101, nor is it Perl for the Somewhat Dim. The code that is passed in via one of the *.xpl files gets passed to eval with next to no modification (see below). Thus, badly-written or malicious code can very well wreak havoc on your server. This is not the fault of the server code. The price of the flexibility this system offers is the responsibility on the part of the developer to ensure that the code is tested and safe.
Code itself is treated as verbatim as possible. Some edits may occur on the server-side, as it make the code suitable for creating an anonymous subroutine from. The <B>make_methodB> tool will attempt to use a CDATA section to embed the code within the XML document, so that there is no need to encode entities or such. This allows for the resulting *.xpl files to be syntax-testable with perl -cx. You can aid this by ensuring that the code does not contain either of the two following character sequences:
The first is the CDATA terminator. If it occurs naturally in the code, it would trigger the end-of-section in the parser. The second is the familiar Perl token, which is inserted so that the remainder of the XML document does not clutter up the Perl parser.
The <B>RPC::XMLB> distribution comes with a number of default methods in a subdirectory called (cryptically enough) methods. Each of these is expressed as a set of (*.base, *.code, *.help) files. The Makefile.PL file configures the resulting Makefile such that these are used to create *.xpl files using this tool, and then install them.
Most problems come out in the form of error messages followed by an abrupt exit.
The tool exits with a status of 0 upon success, and 255 otherwise.
I dont much like this approach to specifying the methods, but I liked my other ideas even less.
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 youll automatically be notified of progress on your bug as I make changes.
o RT: CPANs request tracker
o AnnoCPAN: Annotated CPAN documentation o CPAN Ratings o Search CPAN o Source code on GitHub
This module and the code within are released under the terms of the Artistic License 2.0 (http://www.opensource.org/licenses/artistic-license-2.0.php). This code may be redistributed under either the Artistic License or the GNU Lesser General Public License (LGPL) version 2.1 (http://www.opensource.org/licenses/lgpl-2.1.php).
The <B>XML-RPCB> standard is Copyright (c) 1998-2001, UserLand Software, Inc. See <http://www.xmlrpc.com> for more information about the XML-RPC specification.
Randy J. Ray <email@example.com>
|perl v5.20.3||MAKE_METHOD (1)||2011-08-15|