fix(rich media): fix error handling when resource preview URL leads to empty parsed data
Closes #1279 Signed-off-by: Thomas Citharel <tcit@tcit.fr>
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@ -80,6 +80,8 @@ defmodule Mobilizon.GraphQL.Resolvers.Resource do
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}
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} = _resolution
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) do
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Logger.debug("Getting resource for group with username #{username}")
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with {:group, %Actor{id: group_id}} <- {:group, Actors.get_actor_by_name(username, :Group)},
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{:member, true} <- {:member, Actors.is_member?(actor_id, group_id)},
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{:resource, %Resource{} = resource} <-
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@ -222,13 +224,8 @@ defmodule Mobilizon.GraphQL.Resolvers.Resource do
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{:ok, data} when is_map(data) ->
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{:ok, struct(Metadata, data)}
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{:error, :invalid_parsed_data} ->
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{:error, _error_type, _} ->
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{:error, dgettext("errors", "Unable to fetch resource details from this URL.")}
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{:error, err} ->
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Logger.warn("Error while fetching preview from #{inspect(resource_url)}")
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Logger.debug(inspect(err))
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{:error, :unknown_resource}
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end
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end
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@ -29,19 +29,19 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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def parse(nil), do: {:error, "No URL provided"}
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@spec parse(String.t()) :: {:ok, map()} | {:error, any()}
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@spec parse(String.t()) :: {:ok, map()} | {:error, :http | :parsing | :unknown, any()}
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def parse(url) do
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case Cachex.fetch(:rich_media_cache, url, fn _ ->
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case parse_url(url) do
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{:ok, data} -> {:commit, data}
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{:error, err} -> {:ignore, err}
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{:error, error_type, error} -> {:ignore, {error_type, error}}
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end
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end) do
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{status, value} when status in [:ok, :commit] ->
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{:ok, value}
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{_, err} ->
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{:error, err}
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{_, {error_type, err}} ->
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{:error, error_type, err}
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end
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rescue
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e ->
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@ -56,7 +56,8 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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get_filename_from_headers(response_headers) || get_filename_from_url(url)
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end
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@spec parse_url(String.t(), Enum.t()) :: {:ok, map()} | {:error, any()}
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@spec parse_url(String.t(), Enum.t()) ::
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{:ok, map()} | {:error, :http | :parsing | :unknown, any()}
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defp parse_url(url, options \\ []) do
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user_agent = Keyword.get(options, :user_agent, default_user_agent(url))
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headers = [{"User-Agent", user_agent}]
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@ -64,13 +65,14 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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try do
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with {:ok, _} <- prevent_local_address(url),
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{:ok, %{body: body, status: code, headers: response_headers}}
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{:fetch, {:ok, %{body: body, status: code, headers: response_headers}}}
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when code in 200..299 <-
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RichMediaPreviewClient.get(
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url,
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headers: headers,
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opts: @options
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),
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{:fetch,
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RichMediaPreviewClient.get(
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url,
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headers: headers,
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opts: @options
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)},
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{:is_html, _response_headers, true} <-
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{:is_html, response_headers, is_html(response_headers)} do
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body
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@ -87,17 +89,17 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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{:ok, data}
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{:ok, err} ->
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{:fetch, {_, err}} ->
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Logger.debug("HTTP error: #{inspect(err)}")
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{:error, "HTTP error: #{inspect(err)}"}
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{:error, :http, err}
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{:error, err} ->
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Logger.debug("HTTP error: #{inspect(err)}")
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{:error, "HTTP error: #{inspect(err)}"}
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Logger.debug("Parsing error: #{inspect(err)}")
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{:error, :parsing, err}
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end
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rescue
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e ->
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{:error, "Parsing error: #{inspect(e)} #{inspect(__STACKTRACE__)}"}
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{:error, :unknown, "Parsing error: #{inspect(e)} #{inspect(__STACKTRACE__)}"}
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end
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end
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@ -228,7 +230,7 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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check_parsed_data(data, html, false)
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else
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Logger.debug("Found metadata was invalid or incomplete: #{inspect(data)}")
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{:error, :invalid_parsed_data}
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{:error, :parsing, :invalid_parsed_data}
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end
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end
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@ -252,11 +254,11 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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validate_ip(host) do
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{:ok, url}
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else
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{:error, "Host violates local access rules"}
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{:error, :local_address, "Host violates local access rules"}
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end
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_ ->
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{:error, "Could not detect any host"}
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{:error, :no_host, "Could not detect any host"}
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end
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end
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@ -302,6 +304,8 @@ defmodule Mobilizon.Service.RichMedia.Parser do
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{:ok, data}
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end
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defp check_remote_picture_path({:error, _, _} = err), do: err
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defp check_remote_picture_path(data), do: {:ok, data}
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@spec format_url(String.t(), String.t()) :: String.t()
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@ -67,8 +67,8 @@ defmodule Mobilizon.Service.RichMedia.Parsers.OEmbed do
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{:ok, data} <- Jason.decode(json),
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data <-
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data
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|> Map.new(fn {k, v} -> {String.to_existing_atom(k), String.trim(v)} end)
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|> Map.take(@oembed_allowed_attributes) do
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|> Map.new(fn {k, v} -> {k, if(is_binary(v), do: String.trim(v), else: v)} end)
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|> Map.take(Enum.map(@oembed_allowed_attributes, &to_string/1)) do
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{:ok, data}
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end
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end
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