External preview extension
The External Preview feature helps you preview documents based on an external URL request.
This option is only available if you have enabled the External Preview extension.
Two parameters are passed in the URL request:
- The document uuid.
- The downloadUrl.
Configuration
| Field / Property | Type | Description |
|---|---|---|
|
extension.external.preview |
List |
Each row is a pair of values that declare preview content; the format is: mime-type;url application/illustrator;http://localhost:8180/openkm/test.jsp When you embed a URL in an iframe that belongs to a different subdomain from the application's domain, you must include that domain in the configuration; otherwise, the browser will block it for security reasons. You can find more information about the okm.content.security.policy configuration parameter in the section Experimental configuration parameters |
More information is available at Configuration parameters.
Sample
Configuration
Create a file named test.jsp and copy it to the $TOMCAT_HOME/webapps/openkm folder.
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>External URL request example</title>
</head>
<body>
Request parameters
<br />
<br />
<b>uuid:</b><%=request.getParameter("uuid")%><br />
<br />
<b>dowloadUrl:</b><%=request.getParameter("downloadUrl")%><br />
</body>
</html>Usage
- Choose a document with one of the MIME types set in the configuration parameters.
- Open the Preview tab. The external URL based on the document's MIME type will be shown.
