discourse/lib/freedom_patches/safe_buffer.rb

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# frozen_string_literal: true
# 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
module FreedomPatches
module SafeBuffer
def concat(value, raise_encoding_err = false)
super(value)
rescue Encoding::CompatibilityError
raise if raise_encoding_err
encoding_diags =
+"internal encoding #{Encoding.default_internal}, external encoding #{Encoding.default_external}"
if encoding != Encoding::UTF_8
encoding_diags << " my encoding is #{encoding} "
force_encoding("UTF-8")
unless valid_encoding?
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
if 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
concat(value, _raise = true)
end
ActiveSupport::SafeBuffer.prepend(self)
ActiveSupport::SafeBuffer.class_eval("alias << concat")
end
end