42 lines
1.7 KiB
Markdown
42 lines
1.7 KiB
Markdown
[[template id=plugin name=graphviz author="[[JoshTriplett]]"]]
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[[tag type/chrome type/format]]
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This plugin allows embedding [graphviz](http://www.graphviz.org/) graphs in a
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page. Example usage:
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\[[graph src="a -> b -> c; a -> c;"]]
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Note that graphs will only show up in previews if your browser has
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[[wikipedia data: URI]] support, or if the same graph already exists on that
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page.
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Security implications: graphviz does not seem to have any syntax exploitable to
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perform file access or shell commands on the server. However, the graphviz
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plugin does make denial of service attacks somewhat easier: any user with edit
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privileges can use this plugin to create large files without the need to send
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large amounts of data, allowing them to more quickly fill the disk, run the
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server out of memory, or use up large amounts of bandwidth. Any user can
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already do these things with just the core of ikiwiki, but the graphviz plugin
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allows for an amplification attack, since users can send less data to use large
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amounts of processing time and disk usage.
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The `graph` directive supports the following parameters:
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- `src` - The graphviz source to render.
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- `type` - The type of graph to render: `graph` or `digraph`. Defaults to
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`digraph`.
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- `prog` - The graphviz program to render with: `dot`, `neato`, `fdp`, `twopi`,
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or `circo`. Defaults to `dot`.
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- `height`, `width` - Limit the size of the graph to a given height and width,
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in inches. You must specify both to limit the size; otherwise, graphviz will
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choose a size, without any limit.
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[[if test="enabled(graphviz)" then="""
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Some example graphs:
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[[graph src="a -> b -> c; a -> b;"]]
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[[graph src="a -- b -- c -- a;" prog="circo" type="graph"]]
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"""]]
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This plugin uses the [[cpan Digest::SHA1]] perl module.
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