View Component 25.4
View Component Help

# URLPrefix

A prefix to apply to relative or inline (constructed) link URLs in the document. Use this prefix to direct the links to your viewing client application.

By default, when the View component returns a file that contains a subdocument, such as an image, it replaces the link to the subdocument with a root-relative path that defines a View component action to find and return the image URLs. This option works in the majority of cases.

You might need to set `URLPrefix` if you use a reverse proxy that maps a path other than the root to View (for example, if you need to prefix all your links with `http://myproxy.com/view/`).

You might also need to set `URLPrefix` if the default links do not work, and the absolute links generated after you set UseAbsoluteURLDefaults configuration parameter to `True` do not work either. Here you can use `URLPrefix` to point to the View component by host name, or to point to a Web server to serve up the links.

When you specify a URL prefix, View replaces all links to subdocuments with this prefix and a LinkSpec.

To view a subdocument, use the GetLink action, and pass the link to the subdocument in the LinkSpec parameter. For example:

    URLPrefix=http://ViewserverHostname:14000/action=GetLink&noaci=True&linkspec=

You can specify a default value for `UrlPrefix` in the DefaultURLPrefix configuration parameter. If you do not set `UrlPrefix` or DefaultURLPrefix, View uses a root-relative GetLink action, for example `/action=getlink&noaci=true&links=links&linkspec=` (`links` is the value of the Links parameter in the original View action).

If `UrlPrefix` points to a Web server, View uses the Web server to serve up links. For example:

    URLPrefix=http://apacheserver/alias/

NOTE: By default, View does not add the specified `UrlPrefix` to absolute links (full URLs). To edit these links, use the AbsoluteLinkPrefix configuration parameter.

NOTE: You can also use EmbedImages to base64 encode any images in the converted documents and include the data in the response, rather than using links.

Actions: | GetLink ViewGetDocInfo View
Type: | String
Default: | DefaultURLPrefix
Example: | `URLPrefix=http://myview:8080/action=GetLink&NoACI=True&LinkSpec=`
See Also: | EmbedImages AbsoluteLinkPrefix configuration parameter DefaultURLPrefix configuration parameter RedirectAbsoluteLinks configuration parameter

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Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery View Component 25.4

Topic Title: URLPrefix