Toby Inkster

NAME

Web::Paste::Simple - simple PSGI-based pastebin-like website

SYNOPSIS

        #!/usr/bin/plackup
        use Web::Paste::Simple;
        Web::Paste::Simple->new(
                storage    => Path::Class::Dir->new(...),
                codemirror => "...",
                template   => Text::Template->new(...),
        )->app;

DESCRIPTION

Web::Paste::Simple is a lightweight PSGI app for operating a pastebin-like website. It provides syntax highlighting via the CodeMirror Javascript library. It should be fast enough for deployment via CGI.

It does not provide any authentication facilities or similar, instead relying on you to use subclassing/roles or Plack middleware to accomplish such things.

Constructor

new(%attrs)

Standard Moose-style constructor.

This class is not based on Moose though; instead it uses Moo.

Attributes

The following attributes are defined:

storage

A Path::Class::Dir indicating the directory where pastes should be stored. Pastes are kept indefinitely. Each is a single file.

codemirror

Path to the CodeMirror syntax highlighter as a string. For example, if CodeMirror is available at http://example.com/js/lib/codemirror.js then this string should be http://example.com/js with no trailing slash.

This defaults to an address on my server, but for production sites, please set up your own copy: it only takes a couple of minutes; just a matter of unzipping a single archive. I offer no guarantees about the continued availability of my copy of CodeMirror.

Nothing is actually done with this variable, but it's passed to the template.

template

A Text::Template template which will be used for all HTML output. The following variables are available to the template...

  • $DATA - the text pasted on the curent page (if any), already HTML escaped

  • $MODE - the currently selected syntax highlighting mode (if any), already HTML escaped

  • @MODES - all configured highlighting modes

  • $CODEMIRROR - the path to codemirror

  • $APP - the blessed Web::Paste::Simple object

  • $REQUEST - a blessed Plack::Request for the current request

  • $PACKAGE - the string "Web::Paste::Simple"

  • $VERSION - the Web::Paste::Simple version number

The default template is minimal, but works.

modes

The list of CodeMirror highlighting modes to offer to the user.

Nothing is actually done with this variable, but it's passed to the template.

default_mode

The default highlighting mode.

uuid_gen

A Data::UUID object used to generate URIs. The default should be fine.

Methods

The following methods may be of interest to people subclassing Web::Paste::Simple.

app

Technically this is another attribute, but one that should not be set in the constructor. Call this method to retrieve the PSGI coderef.

This coderef is built by _build_app (a Moo lazy builder).

dispatch

Basic request router/dispatcher. Given a Plack::Request, returns a Plack::Response.

create_paste

Given a Plack::Request corresponding to an HTTP POST request, saves the paste and returns a Plack::Reponse. The response may be an arror message, success message, or (as per the current implementation) a redirect to the paste's URI.

retrieve_paste

Given a Plack::Request and a paste ID, returns a Plack::Response with a representation of the paste, or an error message.

show_error

Given an error string and optionally an HTTP status code, returns a Plack::Response.

show_template

Given a Plack::Request and a hashref of data (possibly including paste and mode keys) returns a Plack::Response with the rendered template, and the pasted data plugged into it.

make_paste_id

Returns a unique ID string for a paste. The current implementation is a base64-encoded UUID.

BUGS

Please report any bugs to http://rt.cpan.org/Dist/Display.html?Queue=Web-Paste-Simple.

SEE ALSO

Plack, Moo, CodeMirror.

AUTHOR

Toby Inkster <tobyink@cpan.org>.

COPYRIGHT AND LICENCE

This software is copyright (c) 2012 by Toby Inkster.

This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.

DISCLAIMER OF WARRANTIES

THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.