51 lines
1.3 KiB
Elixir
51 lines
1.3 KiB
Elixir
# Pleroma: A lightweight social networking server
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# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
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# SPDX-License-Identifier: AGPL-3.0-only
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defmodule Pleroma.Web.RichMedia.Parser.TTL.AwsSignedUrl do
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@behaviour Pleroma.Web.RichMedia.Parser.TTL
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@impl Pleroma.Web.RichMedia.Parser.TTL
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def ttl(data, _url) do
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image = Map.get(data, :image)
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if is_aws_signed_url(image) do
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image
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|> parse_query_params()
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|> format_query_params()
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|> get_expiration_timestamp()
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else
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{:error, "Not aws signed url #{inspect(image)}"}
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end
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end
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defp is_aws_signed_url(image) when is_binary(image) and image != "" do
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%URI{host: host, query: query} = URI.parse(image)
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String.contains?(host, "amazonaws.com") and String.contains?(query, "X-Amz-Expires")
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end
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defp is_aws_signed_url(_), do: nil
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defp parse_query_params(image) do
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%URI{query: query} = URI.parse(image)
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query
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end
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defp format_query_params(query) do
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query
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|> String.split(~r/&|=/)
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|> Enum.chunk_every(2)
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|> Map.new(fn [k, v] -> {k, v} end)
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end
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defp get_expiration_timestamp(params) when is_map(params) do
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{:ok, date} =
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params
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|> Map.get("X-Amz-Date")
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|> Timex.parse("{ISO:Basic:Z}")
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{:ok, Timex.to_unix(date) + String.to_integer(Map.get(params, "X-Amz-Expires"))}
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end
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end
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