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5 XWiki supports [[multi-tenancy>>platform:Features.ScalabilityPerformance]] which means your instance can have several wikis. This page helps you understand how to configure XWiki to access the correct wiki. Check [[XWiki URL Format>>platform:DevGuide.Standard URL Format]] to better understand the current URL scheme.
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7 XWiki supports 2 URL modes: Path-based and Domain based modes.
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9 {{velocity}}
10 {{info}}The documentation below is for XWiki 5.0 and beyond. For earlier versions, use [[this documentation>>path:$xwiki.getURL("Documentation.AdminGuide.Virtualization.AccessWiki.WebHome", "viewrev", "rev=5.1")]]{{/info}}
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13 = Path-based wiki access =
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15 This is the default mode if you haven't touched the XWiki configuration (##xwiki.virtual.usepath## property in the ##xwiki.cfg## file).
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17 The URL format for this mode is: ##http:~/~/host/xwiki/wiki/wikialias/view/Space/Page##.
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19 The important part of the URL is ##/wiki/wikialias##. Specifically it means:
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21 * ##wiki##: this is just a fixed value used by XWiki to identify the URL as a path-based URL. If you wish to set a value different than ##wiki## you can configure it in ##xwiki.cfg## with the property ##xwiki.virtual.usepath.servletpath##.(((
22 {{warning}}
23 Don't forget to set the ##xwiki.authentication.logoutpage## property accordingly. Change the ##wiki## part in the property value for the right alias.
24 {{/warning}}
25 )))
26 * ##wikialias##: this is used by XWiki to find the wiki descriptor (see below for more about wiki descriptors). The following algorithm is used:
27 ** First XWiki tries to find a page that contains a ##XWikiServerClass## object with the ##server## field having a value of ##wikialias##. If it finds one then it computes the name of the wiki by extracting it from that page name. Indeed, pages containing wiki descriptors must be named with the format ##XWikiServer<wikiid>##. For example if a page named ##XWikiServerTest## exists and it contains a ##XWikiServerClass## object with a ##server## field value of ##somewiki## then the URL ##http:~/~/host/xwiki/wiki/somewiki/...## will target the ##test## wiki (the value is lowercased from the page name when extracted).
28 ** If no wiki descriptor can be located then XWiki tries to find a page named ##XWikiServer<wikialias>## and having a ##XWikiServerClass## object in it. If it's found then the target wiki is ##wikialias##.
29 ** If no such page is found then the behavior depends on the value of the configuration property named ##xwiki.virtual.failOnWikiDoesNotExist## (located in your ##xwiki.cfg## file). If the value is ##0## (which is the default) then the wiki served is the main wiki. If the value is ##1## then an error saying that the wiki doesn't exist is displayed.
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31 Note that if no ##/wiki/wikialias## path is found in the URL then XWiki continues to look for a wiki using the domain-based algorithm explained below.
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33 = Domain-based wiki access =
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35 {{info}}
36 This was the default mode prior to XWiki 3.3. After the release of XWiki 3.3 the path-based mode was configured to be the default since it's the easiest to use.
37 {{/info}}
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39 The URL format for this mode is: ##{{{http://domain/xwiki/bin/view/Space/Page}}}##. The information about which wiki is targeted is part of the ##domain## part of the URL.
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41 The following algorithm is used by XWiki:
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43 * First it tries to find a page that contains a ##XWikiServerClass## object with the ##server## field having a value of ##domain##. If it finds one then it computes the name of the wiki by extracting it from that page name. Indeed, pages containing wiki descriptors must be named with the format ##XWikiServer<wikiid>##. For example if a page named ##XWikiServerTest## exists and it contains a ##XWikiServerClass## object with a ##server## field value of ##somewiki## then the URL ##http:~/~/somewiki/xwiki/bin/...## will target the ##test## wiki (the value is lowercased from the page name when extracted).
44 * If no wiki descriptor can be located then XWiki performs some checks:
45 ** If the ##domain## value is an IP (e.g. 127.0.0.1, 85.65.12.36, etc.) or has the value of ##localhost## then XWiki considers you're targeting the main wiki
46 ** If not, then XWiki tries to split the domain name and takes the first part before the "." (dot) character. For example if you have a domain name of ##prefix.domain.com## then it extracts ##prefix##. It then performs some additional checks:
47 *** if the value of ##prefix## is ##www## and there's no wiki alias named ##www## (i.e. there's no page with a ##XWikiServerClass## object having a ##server## field value of ##www##) then XWiki considers you're targeting the main wiki.
48 *** If not, then XWiki tries to find a page named ##XWikiServer<prefix>## and having a ##XWikiServerClass## object in it. If it's found then the target wiki is ##prefix##.
49 *** If no such page is found then the behavior depends on the value of the configuration property named ##xwiki.virtual.failOnWikiDoesNotExist## (located in your ##xwiki.cfg## file). If the value is ##0## (which is the default) then the wiki served is the main wiki. If the value is ##1## then an error saying that the wiki doesn't exist is displayed.
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51 {{info}}
52 Note that in this mode you need to configure your DNS or modify your ##/etc/hosts## file in your operating system (see [[Hosts file documentation on Wikipedia>>http://en.wikipedia.org/wiki/Hosts_file]] for details).
53 {{/info}}

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