/Alias ODB tree: Difference between revisions

From MidasWiki
Jump to navigation Jump to search
No edit summary
m (Suz moved page /Alias ODB page to /Alias ODB tree)
(No difference)

Revision as of 15:22, 7 August 2014


Purpose

The ODB /Alias tree provides the user with a way to access other webpages via buttons placed on the mhttpd Status Page. It can provide links to external webpages, or symbolic links (short-cuts) to ODB sub-trees.

Creating the /Alias tree

The /Alias tree is optional, and is not present until created by the user.


Keys in the /Alias tree

Any key created under /Alias will appear as a button (i.e. alias-button) on the Status Page, with the same name as the key (except as noted below).

By default, the clicking of an alias-button in the web interface will spawn a new frame. To force the display of the alias page in the same frame, an "&" has to be appended to the name of the alias key. The "&" is stripped off the alias name when it appears as an alias-button (see example).

External links

The following odbedit commands demonstrate how to make a link to an external webpage:

[local:t2kgas:S] cd /Alias
[local:t2kgas:S]create string triumf
String length [32]:
[local:t2kgas:S] set triumf "http://triumf.ca"

This will cause a button triumf on the status page, Clicking on this alias-button will show the contents of the link in a new frame.

Symbolic Links

The /Alias tree may also contain a list of symbolic links to any desired ODB location.

The following odbedit commands demonstrate creating alias-buttons linking to ODB keys :


[local:t2kgas:S] cd /Alias
[local:t2kgas:S] ln /Equipment/TpcGasPlc/Common/ "TPC Common"       *** New frame, no &
[local:t2kgas:S] ln /Equipment/TpcGasPlc/Settings/ "TPC Settings&"  *** Same frame, with &
    (comments are preceded by ***)

This would create two alias-buttons TPC Common and TPC Settings. Clicking on TPC Common would open the page in a new frame. Clicking on TPC Settings would open the page in the same frame (see above).