discourse/lib/freedom_patches/safe_buffer.rb

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# For some reason safe buffer is getting invalid encoding in some cases
# we work around the issue and log the problems
#
# The alternative is a broken website when this happens
class ActiveSupport::SafeBuffer
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def concat(value, raise_encoding_err = false)
if !html_safe? || value.html_safe?
super(value)
else
super(ERB::Util.h(value))
end
rescue Encoding::CompatibilityError
if raise_encoding_err
raise
else
encoding_diags = "internal encoding #{Encoding.default_internal}, external encoding #{Encoding.default_external}"
unless encoding == Encoding::UTF_8
encoding_diags << " my encoding is #{encoding} "
self.force_encoding("UTF-8")
unless valid_encoding?
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encode!("utf-16", "utf-8", invalid: :replace)
encode!("utf-8", "utf-16")
end
Rails.logger.warn("Encountered a non UTF-8 string in SafeBuffer - #{self} - #{encoding_diags}")
end
unless value.encoding == Encoding::UTF_8
encoding_diags << " attempted to append encoding #{value.encoding} "
value = value.dup.force_encoding("UTF-8").scrub
Rails.logger.warn("Attempted to concat a non UTF-8 string in SafeBuffer - #{value} - #{encoding_diags}")
end
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concat(value, _raise = true)
end
end
alias << concat
end