mirror of
https://github.com/philomena-dev/philomena.git
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a08510f21e
* add bluesky scraper * use com.atproto.sync.getBlob to get original bluesky image * ignore data after bluesky post id * fix json access and missing function * fix bluesky fullsize image regex
73 lines
2 KiB
Elixir
73 lines
2 KiB
Elixir
defmodule PhilomenaProxy.Scrapers do
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@moduledoc """
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Scrape utilities to facilitate uploading media from other websites.
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"""
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@typedoc "The URL to fetch, as a string."
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@type url :: String.t()
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@typedoc "An individual image in a list associated with a scrape result."
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@type image_result :: %{
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url: url(),
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camo_url: url()
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}
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@typedoc "Result of a successful scrape."
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@type scrape_result :: %{
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source_url: url(),
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description: String.t() | nil,
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author_name: String.t() | nil,
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images: [image_result()]
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}
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@scrapers [
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PhilomenaProxy.Scrapers.Bluesky,
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PhilomenaProxy.Scrapers.Deviantart,
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PhilomenaProxy.Scrapers.Pillowfort,
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PhilomenaProxy.Scrapers.Twitter,
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PhilomenaProxy.Scrapers.Tumblr,
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PhilomenaProxy.Scrapers.Raw
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]
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@doc """
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Scrape a URL for content.
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The scrape result is intended for serialization to JSON.
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## Examples
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iex> PhilomenaProxy.Scrapers.scrape!("http://example.org/image-page")
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%{
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source_url: "http://example.org/image-page",
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description: "Test",
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author_name: "myself",
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images: [
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%{
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url: "http://example.org/image.png"
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camo_url: "http://example.net/UT2YIjkWDas6CQBmQcYlcNGmKfQ/aHR0cDovL2V4YW1wbGUub3JnL2ltY"
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}
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]
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}
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iex> PhilomenaProxy.Scrapers.scrape!("http://example.org/nonexistent-path")
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nil
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"""
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@spec scrape!(url()) :: scrape_result() | nil
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def scrape!(url) do
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uri = URI.parse(url)
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cond do
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is_nil(uri.host) ->
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# Scraping without a hostname doesn't make sense because the proxy cannot fetch it, and
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# some scrapers may test properties of the hostname.
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nil
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true ->
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# Find the first scraper which can handle the URL and process, or return nil
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Enum.find_value(@scrapers, nil, fn scraper ->
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scraper.can_handle?(uri, url) && scraper.scrape(uri, url)
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end)
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end
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end
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end
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