InterceptedURLs Property
Applies To: HTMLRenderer
Description
The InterceptedURLs property is a 2-column matrix that specifies whether the HTMLRenderer will attempt to satisfy a request for a resource from the workspace or, via the CEF, from the internet. If directed to the workspace, the request will trigger an HTTPRequest event if the protocol is http, or a WebSocketUpgrade event if the protocol is ws.
The first column is a wild-carded character scalar or vector containing a pattern to match. The second column is numeric indicating whether or not the HTMLRenderer should trigger an event as shown in the table below. InterceptedURLs may contain any number of rows.
| Value | Meaning |
|---|---|
| 0 | Ignore request; pass to CEF for fulfilment |
| 1 | Trigger an HTTPRequest or WebSocketUpgrade (automatic) in the workspace |
| 2 | Trigger an HTTPRequest or WebSocketUpgrade (manual) in the workspace |
If the requested url is a relative rather than an absolute URL, it is prepended by the string http://dyalog_root/. So, for example, if the HTML property contains :
<link rel="stylesheet" href="style.css">
<script src="app.js"></script>
the HTMLRenderer will request http://dyalog_root/style.css and http://dyalog_root/app.js respectively.
When the value of InterceptedURLs is its default ( (0 2⍴'') it is treated as if it were set to ((1 2⍴'*://dyalog_root/*' 1). So by default, requests for a relative URL will fire an event in the workspace while absolute URL will be directed by the CEF to the internet.
Note that if code in the page creates a web socket intended for internal use, with anything other than dyalog_root as the URL, the URL must match a pattern in InterceptedURLs with 1 in the second column. The following example does not require a matching pattern in InterceptedURLs.
// Create a new WebSocket.
window.socket = new WebSocket('ws://dyalog_root/');
Examples
The following will trigger an event for all requested URLs.
InterceptedURLs ← 1 2⍴'*' 1
The following will attempt to retrieve from the net URLs containing '.dyalog.com' and trigger an HTTPRequest event for all other requested URLs.
InterceptedURLs ← 2 2⍴'*.dyalog.com*' 0 '*' 1