HTMLSanitizer.jl

HTML sanitization in Julia
Author JuliaComputing
Popularity
3 Stars
Updated Last
2 Years Ago
Started In
December 2019

HTMLSanitizer

Build Status

Whitelist-based HTML sanitizer inspired by sanitize and html-pipeline.

HTMLSanitizer.jl parses your source HTML with Gumbo.jl and then filters tags and attributes according to a whitelist. The default whitelists are fairly close to GitHubs pipeline for rendering markdown to HTML.

Usage

julia> sanitize("<a onclick='javascript:alert(0)'>YO DAWG</a>")
"<a>YO DAWG</a>"
julia> sanitize("""<img src="https://github.com/JuliaComputing/HTMLSanitizer.jl/raw/master/./foo.jpg" longdesc="javascript:alert(1)"></img>""")
"<img src=\"./foo.jpg\"></img>"
julia> whitelist = deepcopy(HTMLSanitizer.WHITELIST)
Dict{Symbol,Any} with 4 entries:
  :protocols       => Dict("del"=>Dict("cite"=>["http", "https", :relative]),"ins"=>D…
  :attributes      => Dict{Any,Array{String,1}}("del"=>["cite"],"ins"=>["cite"],:ALL=…
  :elements        => ["h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b"  …  …
  :remove_contents => ["script"]

julia> append!(whitelist[:elements], ["body", "head"]); # body and head are not allowed by default

julia> HTMLSanitizer.sanitize("""
        <html><head></head><body onload!#\$%&()*~+-_.,:;?@[/|\\]^`=alert("XSS")></body></html>
       """, isfragment = false, whitelist = whitelist)
"<HTML><head></head><body></body></HTML>"

Whitelists

Two whitelists are provided: HTMLSanitizer.WHITELIST and HTMLSanitizer.LIMITED. Check out the implementation if you want to know what exactly is whitelisted.

Used By Packages