Konstrukt::Doc::Tutorial::Usage::Blog - Using the blog plugin to create a blog


This tutorial will teach you how to set up a website and use an existing application plugin.

It will show you how easy it is to integrate full featured applications like a blog into your website.


First of all, you have to create the directories, database and the configuration file needed for your website.

1. Create the directories cache, log and page somewhere in a directory of your choice. Apache will need read and write access to this directories. Your directory structure should look like this:
        cache/           #the directory where the objects get cached
         \- ...
        logs/            #your apache logs might be stored here
         |- access.log
         \- error.log
        page/            #the document root: all your pages and \
         \- ...
2. Create a MySQL database. For exmple create a database called "blog" for the user "blog" with the password "foobar":
        CREATE DATABASE blog;
        GRANT ALL ON blog.* TO blog@'%' IDENTIFIED by 'foobar';
3. Create a new vhost for this website. Advice on this can be found in the installation documentation.
4. Create the page configuration file page/konstrukt.settings and enter this settings:
        #the plugins should create the database tables and templates automatically
        #the web server will need write-access to your document root
        autoinstall 1
        #activate the session management
        session/use 1
        #specify the database we want to use
        dbi/source dbi:mysql:blog:localhost
        dbi/user   blog
        dbi/pass   foobar
        #anonymous visitors can create blog
        #entries and have admin rights
        blog/userlevel_write          0
        blog/userlevel_admin          0
4. Restart your apache and you're done with the setup!


Now we will create the web page, that will contain the blog.

Create a file index.html inside the page directory:

                <head><title>my blog</title></head>
                        <& blog / &>

That's already enough to embed a blog in your website!


Point your web browser to this page. You will see a page, that says, that there are no blog entries, yet. On the right you should see a link to create a new entry. Click on it and add an entry. You can even use wiki syntax to format your blog entry.

After you added the entry, it will be shown and you can edit and delete it.

That's it! All needed database tables and templates have been created automatically (take a look into your database and in the page directory). You can wasily customize the look and feel by modifying the default templates.


It's a good idea to keep common components like the layout in separate templates.

Create a new template file layout.template in the directory page/templates:

                <head><title><+$ title $+>default title<+$ / $+></title></head>
                        <+$ content $+>no content specified for this page<+$ / $+>

Now chage index.html to look like that:

        <& template src="/templates/layout.template" title="my blog" &>
                <$ content $>
                        <& blog / &>
                <$ / $>
        <& / &>

The page will then load the layout template and put the specified title (which is "my blog") and the specified content (which is the blog) into it. You now can easily reuse your layout on other pages and only have to touch one file, when the layout changes.


Probably it's not your intention that every visitor can edit blog entries. In reality you just want a registered user to do that.

Remove the lines:

        blog/userlevel_write          0
        blog/userlevel_admin          0

from your konstrukt.settings. Now only registered users with the appropriate permissions can write blog entries. (The existing entry can still be edited as it has been created by an anonymous user.)

You now need to use the usermanagement to create a user and log in.

Create a file login.html and put this code into it:

        <& template src="/templates/layout.template" title="usermanagement" &>
                <$ content $>
                        <& perl &>
                                #preload plugins, which will react on events (register, deregister)
                                #that may be fired by the basic user management
                                use_plugin 'usermanagement::level';
                                use_plugin 'usermanagement::personal';
                        <& / &>
                        <& usermanagement::basic / &>
                <$ / $>
        <& / &>

This page will use the basic usermanagement plugin to allow users to register themselves on the website and to log in.

In the registration progress a mail with the initial password will be sent to the specified email address. So maybe you have to configure your mail settings, if the defaults don't fit.

Point your web browser to login.html and register yourself with your email address. You'll get your initial password sent to that address and then can log in with your email address and your password. You then can edit blog entries again.

Take a look at Konstrukt::Plugin::usermanagement::level and "CONFIGURATION" in Konstrukt::Plugin::blog to adjust the user permissions.


Copyright 2006 Thomas Wittek (mail at gedankenkonstrukt dot de). All rights reserved.

This document is free software. It is distributed under the same terms as Perl itself.


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Parent: Konstrukt::Doc