90 lines
2.8 KiB
Elixir
90 lines
2.8 KiB
Elixir
defmodule Pleroma.Web.WebFinger do
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alias Pleroma.XmlBuilder
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alias Pleroma.User
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alias Pleroma.Web.OStatus
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alias Pleroma.Web.XML
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require Logger
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def host_meta() do
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base_url = Pleroma.Web.base_url
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{
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:XRD, %{ xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0" },
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{
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:Link, %{ rel: "lrdd", type: "application/xrd+xml", template: "#{base_url}/.well-known/webfinger?resource={uri}" }
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}
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}
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|> XmlBuilder.to_doc
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end
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def webfinger(resource) do
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host = Pleroma.Web.host
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regex = ~r/(acct:)?(?<username>\w+)@#{host}/
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case Regex.named_captures(regex, resource) do
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%{"username" => username} ->
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user = User.get_cached_by_nickname(username)
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{:ok, represent_user(user)}
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_ -> nil
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end
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end
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def represent_user(user) do
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{
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:XRD, %{xmlns: "http://docs.oasis-open.org/ns/xri/xrd-1.0"},
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[
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{:Subject, "acct:#{user.nickname}@#{Pleroma.Web.host}"},
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{:Alias, user.ap_id},
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{:Link, %{rel: "http://schemas.google.com/g/2010#updates-from", type: "application/atom+xml", href: OStatus.feed_path(user)}},
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{:Link, %{rel: "salmon", href: OStatus.salmon_path(user)}}
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]
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}
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|> XmlBuilder.to_doc
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end
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# FIXME: Make this call the host-meta to find the actual address.
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defp webfinger_address(domain) do
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"//#{domain}/.well-known/webfinger"
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end
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defp webfinger_from_xml(doc) do
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magic_key = XML.string_from_xpath(~s{//Link[@rel="magic-public-key"]/@href}, doc)
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"data:application/magic-public-key," <> magic_key = magic_key
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topic = XML.string_from_xpath(~s{//Link[@rel="http://schemas.google.com/g/2010#updates-from"]/@href}, doc)
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subject = XML.string_from_xpath("//Subject", doc)
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salmon = XML.string_from_xpath(~s{//Link[@rel="salmon"]/@href}, doc)
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data = %{
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magic_key: magic_key,
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topic: topic,
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subject: subject,
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salmon: salmon
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}
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{:ok, data}
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end
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def finger(account, getter \\ &HTTPoison.get/3) do
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domain = with [_name, domain] <- String.split(account, "@") do
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domain
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else _e ->
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URI.parse(account).host
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end
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address = webfinger_address(domain)
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# try https first
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response = with {:ok, result} <- getter.("https:" <> address, ["Accept": "application/xrd+xml"], [params: [resource: account]]) do
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{:ok, result}
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else _ ->
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getter.("http:" <> address, ["Accept": "application/xrd+xml"], [params: [resource: account]])
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end
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with {:ok, %{status_code: status_code, body: body}} when status_code in 200..299 <- response,
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doc <- XML.parse_document(body),
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{:ok, data} <- webfinger_from_xml(doc) do
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{:ok, data}
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else
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e ->
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Logger.debug("Couldn't finger #{account}.")
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Logger.debug(inspect(e))
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{:error, e}
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end
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end
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end
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