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====== iframe Plugin ======
<code>
---- plugin ----
description: Allows external URLs to be loaded into an iframe in your DokuWiki page
author     : Christopher Smith
email      : chris@jalakai.co.uk
type       : syntax
lastupdate : 2023-08-17
compatible : Lemming, Anteater, Rincewind, Angua, Adora Belle, Weatherwax, Binky, Ponder Stibbons, Hrun, Detritus, Elenor of Tsort, Frusterick Manners, Greebo, Hogfather, Igor
depends    : 
conflicts  : 
similar    : 
tags       : embed, include
</code>
  * downloadurl: https://github.com/Chris--S/dokuwiki-plugin-iframe/archive/master.zip
  * sourcerepo : https://github.com/Chris--S/dokuwiki-plugin-iframe
  * bugtracker : https://github.com/Chris--S/dokuwiki-plugin-iframe/issues

----

This plugin allows you to embed other web sites in a DokuWiki page using an iframe.


===== Download and Installation =====

Search and install the plugin using the [[doku>plugin:extension|Extension Manager]]. Refer to [[doku>:Plugins]] on how to install plugins manually.


==== Revision History ====

For more recent revisions please check [[https://github.com/Chris--S/dokuwiki-plugin-iframe/commits/master|github commit list]]

  * 2023-08-17
    * fix PHP8 warnings
    * add 'fullscreen' parameter
  * 2016-02-02
    * fix method signatures to match those of parent class
  * 2015-08-09/10
    * put plugin information into plug.info.txt
    * add translation strings for French, German & Dutch
  * 2015-07-31
    * move code into github
  * 2008-10-13
    * more relaxed syntax
    * new parameters
  * 2006-12-17
    * update for stricter type/error checking in php 5 (thanks Ilya)
    * add support for controlling settings through config plugin
  * 2006-05-01 --- (darcs version only, others to follow) settings moved to use [[doku>devel:common plugin functions]] making them editable via the [[doku>plugin:config|configuration manager]] in the admin menu.
  * 2005-10-17 --- Released.


==== Manual Installation ====

To install the plugin manually, download the source to your plugin folder, ''lib/plugins'' and extract its contents.  That will create a new plugin folder, ''lib/plugins/iframe'', and install the plugin.

The folder will contain:

  conf/default.php                       default settings
  conf/metadata.php                      settings information for the config plugin
  lang/xx/lang.php                       language strings for config plugin
  syntax.php                             plugin script


===== Syntax and Usage =====

Simple:

  {{url>http://www.example.com/somepage.html}}

Complete Syntax:

  {{url>someurl width,height noscroll noborder alignment fullscreen|alternate-text}}

That is an URL to embed, followed by several optional parameters. The following parameters are recognized:

  * //width// and //height// are optional. When only one value is given it is assumed to be the height. Otherwise the first value is width and the second value is height. You can give the values in ''px'', ''em'', ''pt'' or ''%''. When no unit is given ''px'' <del>is</del> is NOT assumed (you have to give the value). Defaults values are: width - 98%, height - 400px.
  * ''noscroll'' will disable the scrollbars of the iframe
  * ''noborder'' will disable the frame border, note that your CSS might still add borders or may disable them without using this setting
  * Optionally an //alignment// can be given as ''left'' or ''right'' to have the iframe floating to the left or right. Should be used with a width.
  * ''fullscreen'' will include the allowfullscreen attribute.
  * An //alternate text// is optional. If not specified an empty string will be used.

See the plugin in action:

{{url>https://www.frangipani.org/}}

===== Configuration =====

The plugin has one configuration setting, which can be set via the admin/configuration settings page.

  * $js_ok --- default value - ''false'', set to ''true'' to enable JavaScript URLs.

:!: This should never be enabled in public wikis as it opens a XSS security hole.


===== Acknowledgments =====

The plugin was created in response to an idea mentioned by [[styno@hotmail.com|Styno]].

This plugin was used as a basis for [[plugin:google_cal]] by [[Kite@puzzlers.org|Kite]]


====== Known Problems ======

===== Mixed Content (HTTPS vs. HTTP) =====

Modern web browsers will by default NOT embed stuff from "HTTP-only" sources in an [[wp>HTTPS]] environment((older browsers may just inform the user about mixed content, but will mix it)) - browsers will show dialogs on top or bottom of the page's window (noted for IE and SeaMonkey) or a symbol at the beginning (Firefox) or the end (Chrome) of the URL bar, allowing situative or general settings for "mixed content". :-D Should be no problem if you keep your site consistent (use relative url paths for local sources), but may be confusing in test cases.


====== Discussion ======

This used to be the right spot for this, but maybe not these days?

First a big thanks to Christopher for this plugins, it's because I want to use it a lot more in my newest wiki that I took the time to figure out why it was broken(it's not).

Some one (like me) upgrading their DokuWiki from the 2008-05-05 release using the older release of this plugin (2006-12-17) will think its broken.

I know I did, but after studying the source code and doing some experiments I realized what is really wrong is that the syntax changed, (a lot) between then and now.  The old 2006 release **requires** brackets for its arguments, the 2008 release chokes on brackets and creates bad URL's.  I suspect this is well known to people who follow the forums, but a surprise to those like me who simply visit the plugin pages every few years.  To fix simply change your pages that use this plugin from using brackets to using a leading space and all will be well.  Examples (all url's point to a private, off Internet server):

^  Iframe release \\ year  ^         Example valid usage                 ^  ^
|  2006-12-17  | %%{{url>http://asimov/DokuWiki/[80%,400px]|iFrame not installed}}%% | OLD SYNTAX |
|  2008-10-31  | %%{{url>http://asimov/DokuWiki/%%** 80%,400px**%%|iFrame not installed}}%% | NEW SYNTAX |
|  2008-10-31  | %%{{url>http://asimov/DokuWiki/|iFrame not installed}}%% | |
|  2006-12-17  | %%{{url>http://asimov/DokuWiki/|iFrame not installed}}%% | |

Notice how if no arguments are given, then the same syntax works fine for both releases.  Perhaps this is why this
plugin is tagged as 'broken' by some?  Also keep in mind the original 2006 release only supported frame width, height.
New version supports floats, and invisible borders. (which I think is really cool)

Regardless, it's a great plugin, thank you Christopher Smith for your work then and now.

PS. Yes I know doc above says the same thing, but sometimes you have to hit people over the head before they listen.

====== Tip to use together with survey-tool ======

The iFrame is a great means to link your Wiki to for example Survey-tools like SurveyGizmo. In wiki's with registered users you can even use the username as a key to string together the two environments, by using the value of @USER@ as URL parameter sguid. The result is great, persistent dynamic content in the iFrame specific for the current user.

To achieve this, a very small addition to iFrame is needed so that it accepts @USER@ as a variable. In syntax.php, line 96 simply replace:

<code>'src'   => $data['url'], </code>

with

<code>'src'   => str_replace('@USER@', $_SERVER['REMOTE_USER'], $data['url']), </code>

That's all.

Independent from this: A useful extension of this plugin to avoid security problems would be, to restrict the possible URL's through a list in the configuration.

 --- [[user>harald|Harald]] //2014/03/22 11:53//
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