akkoma/lib/pleroma/web/xml.ex

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# Pleroma: A lightweight social networking server
# Copyright © 2017-2021 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.XML do
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require Logger
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def string_from_xpath(_, :error), do: nil
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def string_from_xpath(xpath, doc) do
try do
{:xmlObj, :string, res} = :xmerl_xpath.string(~c"string(#{xpath})", doc)
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res =
res
|> to_string
|> String.trim()
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if res == "", do: nil, else: res
catch
_e ->
Logger.debug("Couldn't find xpath #{xpath} in XML doc")
nil
end
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end
def parse_document(text) do
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try do
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{doc, _rest} =
text
|> :binary.bin_to_list()
|> :xmerl_scan.string(
quiet: true,
fetch_fun: fn _, _ -> raise "Resolving external entities not supported" end
)
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{:ok, doc}
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rescue
_e ->
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Logger.debug("Couldn't parse XML: #{inspect(text)}")
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:error
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catch
:exit, _error ->
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Logger.debug("Couldn't parse XML: #{inspect(text)}")
:error
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end
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end
end