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87 lines
2.5 KiB
87 lines
2.5 KiB
defmodule Microformats2 do
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def parse(url) do
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response = HTTPotion.get(url, follow_redirects: true)
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if HTTPotion.Response.success?(response) do
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parse(response.body, url)
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else
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:error
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end
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end
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def parse(content, url) do
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doc =
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Floki.parse(content)
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|> Floki.filter_out("template")
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|> Floki.filter_out("style")
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|> Floki.filter_out("script")
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|> Floki.filter_out(:comment)
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rels = Microformats2.Rels.parse(doc, url)
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items = Microformats2.Items.parse(doc, doc, url)
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%{items: items, rels: rels[:rels], rel_urls: rels[:rel_urls]}
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end
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def attr_list(node, attr \\ "class") do
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Floki.attribute(node, attr) |> List.first() |> to_string |> String.split(" ", trim: true)
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end
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def blank?(nil), do: true
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def blank?(""), do: true
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def blank?([]), do: true
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def blank?(_), do: false
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def stripped_or_nil(nil), do: nil
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def stripped_or_nil(val), do: String.trim(val)
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def is_rootlevel?(node) when is_tuple(node) do
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attr_list(node, "class")
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|> Enum.any?(fn cls -> is_a?(cls, "h") end)
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end
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def is_rootlevel?(class_name) when is_bitstring(class_name) do
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is_a?(class_name, "h")
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end
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def is_a?("h-" <> _, wanted), do: wanted == "h"
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def is_a?("p-" <> _, wanted), do: wanted == "p"
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def is_a?("e-" <> _, wanted), do: wanted == "e"
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def is_a?("u-" <> _, wanted), do: wanted == "u"
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def is_a?("dt-" <> _, wanted), do: wanted == "dt"
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def is_a?(_, _), do: false
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def has_a?(node, wanted) do
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attr_list(node) |> Enum.filter(fn class -> is_a?(class, wanted) end) |> blank?
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end
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def abs_uri(url, base_url, doc) do
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parsed = URI.parse(url)
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parsed_base = URI.parse(base_url)
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cond do
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# absolute URI
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not Microformats2.blank?(parsed.scheme) ->
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url
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# protocol relative URI
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Microformats2.blank?(parsed.scheme) and not Microformats2.blank?(parsed.host) ->
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URI.to_string(%{parsed | scheme: parsed_base.scheme})
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true ->
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base_element = Floki.find(doc, "base")
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new_base =
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if base_element == nil or Microformats2.blank?(Floki.attribute(base_element, "href")) do
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base_url
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else
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abs_uri(Floki.attribute(base_element, "href") |> List.first(), base_url, [])
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end
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parsed_new_base = URI.parse(new_base)
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new_path = Path.expand(parsed.path || "/", Path.dirname(parsed_new_base.path || "/"))
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URI.to_string(%{parsed | scheme: parsed_new_base.scheme, host: parsed_new_base.host, path: new_path})
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end
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end
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end
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