TWiki External Links
URLs starting with file , ftp , gopher , http , https , irc , mailto , news , nntp and telnet are linked automatically if preceded by whitespace or parenthesis. External links are indicated with a trailing icon, and open up in a new browser tab or window; the behavior of both can be set in configure or preferences variables. Links can be prevented with an ! exclamation point prefix.
Note: if a link is written directly as HTML (<a href="http://...">...</a> ), it is not subject to the external link conversion.
Preferences Variables
Users can customize the behavior of the external links (typically in the WebPreferences page).
Variable |
Value |
Description |
EXTERNALLINKSINNEWWINDOW |
on/off |
Open external links in a new browser tab or window |
EXTERNALLINKSICON |
on/off |
Show a trailing icon |
INTERNALLINKDOMAINS |
(see below) |
Add domain names that should not be regarded as "external" |
The value of INTERNALLINKDOMAINS is expected to be a comma-separated list of domain names.
Each domain name entry should be any of the below:
- A proper domain name (such as
www.example.com ) - not including any of the subdomains
- A domain name with a preceding dot (such as
.example.com ) - indicating any subdomains (e.g. foo.example.com ) but not including the domain itself (example.com )
- A single dot (.) - indicating any "one-word" domain names, typically used in an intranet.
- A topic name in the format
topic:TopicName or topic:WebName.TopicName . The WebName defaults to the base web (%BASEWEB%) in the current context.
If a topic name is specified, the topic is expected to contain a table, where the left-most column is for the domains.
| *Domain* |
| twiki1.example.com |
| twiki2.example.com |
| twiki3.example.com |
Configuration
Administrators can configure the default settings of the external link behaviors. (configure)
Config |
Default |
Description<-- --> |
$cfg{Links}{InternalLinkDomains} |
(unset) |
Add domain names that should not be regarded as "external" |
$cfg{Links}{ExternalLinksInNewWindow} |
on |
Open external links in a new browser tab or window |
$cfg{Links}{ExternalLinksIcon} |
on |
Show a trailing icon |
See above for the value of InternalLinkDomains . The WebName in the topic:TopicName defaults to the system web (%SYSTEMWEB%, or "TWiki"). |