142 lines
5.1 KiB
Markdown
142 lines
5.1 KiB
Markdown
[[!toc levels=2]]
|
|
|
|
Mediawiki is a dynamically-generated wiki which stores it's data in a
|
|
relational database. Pages are marked up using a proprietary markup. It is
|
|
possible to import the contents of a Mediawiki site into an ikiwiki,
|
|
converting some of the Mediawiki conventions into Ikiwiki ones.
|
|
|
|
The following instructions describe ways of obtaining the current version of
|
|
the wiki. We do not yet cover importing the history of edits.
|
|
|
|
Another set of instructions and conversion tools (which imports the full history)
|
|
can be found at <http://github.com/mithro/media2iki>
|
|
|
|
## Step 1: Getting a list of pages
|
|
|
|
The first bit of information you require is a list of pages in the Mediawiki.
|
|
There are several different ways of obtaining these.
|
|
|
|
### Parsing the output of `Special:Allpages`
|
|
|
|
Mediawikis have a special page called `Special:Allpages` which list all the
|
|
pages for a given namespace on the wiki.
|
|
|
|
If you fetch the output of this page to a local file with something like
|
|
|
|
wget -q -O tmpfile 'http://your-mediawiki/wiki/Special:Allpages'
|
|
|
|
You can extract the list of page names using the following python script. Note
|
|
that this script is sensitive to the specific markup used on the page, so if
|
|
you have tweaked your mediawiki theme a lot from the original, you will need
|
|
to adjust this script too:
|
|
|
|
import sys
|
|
from xml.dom.minidom import parse, parseString
|
|
|
|
dom = parse(sys.argv[1])
|
|
tables = dom.getElementsByTagName("table")
|
|
pagetable = tables[-1]
|
|
anchors = pagetable.getElementsByTagName("a")
|
|
for a in anchors:
|
|
print a.firstChild.toxml().\
|
|
replace('&','&').\
|
|
replace('<','<').\
|
|
replace('>','>')
|
|
|
|
Also, if you have pages with titles that need to be encoded to be represented
|
|
in HTML, you may need to add further processing to the last line.
|
|
|
|
Note that by default, `Special:Allpages` will only list pages in the main
|
|
namespace. You need to add a `&namespace=XX` argument to get pages in a
|
|
different namespace. The following numbers correspond to common namespaces:
|
|
|
|
* 10 - templates (`Template:foo`)
|
|
* 14 - categories (`Category:bar`)
|
|
|
|
Note that the page names obtained this way will not include any namespace
|
|
specific prefix: e.g. `Category:` will be stripped off.
|
|
|
|
### Querying the database
|
|
|
|
If you have access to the relational database in which your mediawiki data is
|
|
stored, it is possible to derive a list of page names from this.
|
|
|
|
## Step 2: fetching the page data
|
|
|
|
Once you have a list of page names, you can fetch the data for each page.
|
|
|
|
### Method 1: via HTTP and `action=raw`
|
|
|
|
You need to create two derived strings from the page titles: the
|
|
destination path for the page and the source URL. Assuming `$pagename`
|
|
contains a pagename obtained above, and `$wiki` contains the URL to your
|
|
mediawiki's `index.php` file:
|
|
|
|
src=`echo "$pagename" | tr ' ' _ | sed 's,&,&,g'`
|
|
dest=`"$pagename" | tr ' ' _ | sed 's,&,__38__,g'`
|
|
|
|
mkdir -p `dirname "$dest"`
|
|
wget -q "$wiki?title=$src&action=raw" -O "$dest"
|
|
|
|
You may need to add more conversions here depending on the precise page titles
|
|
used in your wiki.
|
|
|
|
If you are trying to fetch pages from a different namespace to the default,
|
|
you will need to prefix the page title with the relevant prefix, e.g.
|
|
`Category:` for category pages. You probably don't want to prefix it to the
|
|
output page, but you may want to vary the destination path (i.e. insert an
|
|
extra directory component corresponding to your ikiwiki's `tagbase`).
|
|
|
|
### Method 2: via HTTP and `Special:Export`
|
|
|
|
Mediawiki also has a special page `Special:Export` which can be used to obtain
|
|
the source of the page and other metadata such as the last contributor, or the
|
|
full history, etc.
|
|
|
|
You need to send a `POST` request to the `Special:Export` page. See the source
|
|
of the page fetched via `GET` to determine the correct arguments.
|
|
|
|
You will then need to write an XML parser to extract the data you need from
|
|
the result.
|
|
|
|
### Method 3: via the database
|
|
|
|
It is possible to extract the page data from the database with some
|
|
well-crafted queries.
|
|
|
|
## Step 3: format conversion
|
|
|
|
The next step is to convert Mediawiki conventions into Ikiwiki ones.
|
|
|
|
### categories
|
|
|
|
Mediawiki uses a special page name prefix to define "Categories", which
|
|
otherwise behave like ikiwiki tags. You can convert every Mediawiki category
|
|
into an ikiwiki tag name using a script such as
|
|
|
|
import sys, re
|
|
pattern = r'\[\[Category:([^\]]+)\]\]'
|
|
|
|
def manglecat(mo):
|
|
return '[[!tag %s]]' % mo.group(1).strip().replace(' ','_')
|
|
|
|
for line in sys.stdin.readlines():
|
|
res = re.match(pattern, line)
|
|
if res:
|
|
sys.stdout.write(re.sub(pattern, manglecat, line))
|
|
else: sys.stdout.write(line)
|
|
|
|
## Step 4: Mediawiki plugin
|
|
|
|
The [[plugins/contrib/mediawiki]] plugin can be used by ikiwiki to interpret
|
|
most of the Mediawiki syntax.
|
|
|
|
## External links
|
|
|
|
[[sabr]] used to explain how to [import MediaWiki content into
|
|
git](http://u32.net/Mediawiki_Conversion/index.html?updated), including full
|
|
edit history, but as of 2009/10/16 that site is not available. A copy of the
|
|
information found on this website is stored at <http://github.com/mithro/media2iki>
|
|
|
|
|