analytics/lib/plausible_web/controllers/api/external_controller.ex
2021-01-05 15:17:50 +02:00

287 lines
8.0 KiB
Elixir

defmodule PlausibleWeb.Api.ExternalController do
use PlausibleWeb, :controller
require Logger
def event(conn, _params) do
params = parse_body(conn)
Sentry.Context.set_extra_context(%{request: params})
case create_event(conn, params) do
{:ok, _} ->
conn |> send_resp(202, "")
{:error, changeset} ->
request = Sentry.Plug.build_request_interface_data(conn, [])
Sentry.capture_message("Error processing event",
extra: %{errors: inspect(changeset.errors), params: params, request: request}
)
Logger.info("Error processing event: #{inspect(changeset)}")
conn |> send_resp(400, "")
end
end
def error(conn, _params) do
request = Sentry.Plug.build_request_interface_data(conn, [])
Sentry.capture_message("JS snippet error", request: request)
send_resp(conn, 200, "")
end
def health(conn, _params) do
postgres_health =
case Ecto.Adapters.SQL.query(Plausible.Repo, "SELECT 1", []) do
{:ok, _} -> "ok"
e -> "error: #{inspect(e)}"
end
clickhouse_health =
case Ecto.Adapters.SQL.query(Plausible.ClickhouseRepo, "SELECT 1", []) do
{:ok, _} -> "ok"
e -> "error: #{inspect(e)}"
end
status =
case {postgres_health, clickhouse_health} do
{"ok", "ok"} -> 200
_ -> 500
end
put_status(conn, status)
|> json(%{
postgres: postgres_health,
clickhouse: clickhouse_health
})
end
defp parse_user_agent(conn) do
user_agent = Plug.Conn.get_req_header(conn, "user-agent") |> List.first()
if user_agent do
Cachex.fetch!(:user_agents, user_agent, fn ua ->
{:commit, UAInspector.parse(ua)}
end)
end
end
defp create_event(conn, params) do
params = %{
"name" => params["n"] || params["name"],
"url" => params["u"] || params["url"],
"referrer" => params["r"] || params["referrer"],
"domain" => params["d"] || params["domain"],
"screen_width" => params["w"] || params["screen_width"],
"hash_mode" => params["h"] || params["hashMode"],
"meta" => parse_meta(params)
}
ua = parse_user_agent(conn)
if is_bot?(ua) do
{:ok, nil}
else
uri = params["url"] && URI.parse(params["url"])
query = if uri && uri.query, do: URI.decode_query(uri.query), else: %{}
ref = parse_referrer(uri, params["referrer"])
country_code = visitor_country(conn)
salts = Plausible.Session.Salts.fetch()
event_attrs = %{
timestamp: NaiveDateTime.utc_now() |> NaiveDateTime.truncate(:second),
name: params["name"],
hostname: strip_www(uri && uri.host),
domain: strip_www(params["domain"]) || strip_www(uri && uri.host),
pathname: get_pathname(uri, params["hash_mode"]),
user_id: generate_user_id(conn, params, salts[:current]),
referrer_source: get_referrer_source(query, ref) || "",
referrer: clean_referrer(ref) || "",
utm_medium: query["utm_medium"] || "",
utm_source: query["utm_source"] || "",
utm_campaign: query["utm_campaign"] || "",
country_code: country_code || "",
operating_system: (ua && os_name(ua)) || "",
operating_system_version: (ua && os_version(ua)) || "",
browser: (ua && browser_name(ua)) || "",
browser_version: (ua && browser_version(ua)) || "",
screen_size: calculate_screen_size(params["screen_width"]) || "",
"meta.key": Map.keys(params["meta"]),
"meta.value": Map.values(params["meta"]) |> Enum.map(&Kernel.to_string/1)
}
changeset = Plausible.ClickhouseEvent.changeset(%Plausible.ClickhouseEvent{}, event_attrs)
if changeset.valid? do
previous_user_id = salts[:previous] && generate_user_id(conn, params, salts[:previous])
event = struct(Plausible.ClickhouseEvent, event_attrs)
session_id = Plausible.Session.Store.on_event(event, previous_user_id)
Map.put(event, :session_id, session_id)
|> Plausible.Event.WriteBuffer.insert()
else
{:error, changeset}
end
end
end
defp is_bot?(%UAInspector.Result.Bot{}), do: true
defp is_bot?(%UAInspector.Result{client: %UAInspector.Result.Client{name: "Headless Chrome"}}),
do: true
defp is_bot?(_), do: false
defp parse_meta(params) do
raw_meta = params["m"] || params["meta"] || params["p"] || params["props"]
if raw_meta do
Jason.decode!(raw_meta)
else
%{}
end
end
defp get_pathname(nil, _), do: "/"
defp get_pathname(uri, hash_mode) do
pathname =
(uri.path || "/")
|> URI.decode()
if hash_mode && uri.fragment do
pathname <> "#" <> URI.decode(uri.fragment)
else
pathname
end
end
defp visitor_country(conn) do
result =
PlausibleWeb.RemoteIp.get(conn)
|> Geolix.lookup()
|> Map.get(:country)
if result && result.country do
result.country.iso_code
end
end
defp parse_referrer(_, nil), do: nil
defp parse_referrer(uri, referrer_str) do
referrer_uri = URI.parse(referrer_str)
if strip_www(referrer_uri.host) !== strip_www(uri.host) && referrer_uri.host !== "localhost" do
RefInspector.parse(referrer_str)
end
end
defp generate_user_id(conn, params, salt) do
user_agent = List.first(Plug.Conn.get_req_header(conn, "user-agent")) || ""
ip_address = PlausibleWeb.RemoteIp.get(conn)
domain = strip_www(params["domain"]) || ""
SipHash.hash!(salt, user_agent <> ip_address <> domain)
end
defp calculate_screen_size(nil), do: nil
defp calculate_screen_size(width) when width < 576, do: "Mobile"
defp calculate_screen_size(width) when width < 992, do: "Tablet"
defp calculate_screen_size(width) when width < 1440, do: "Laptop"
defp calculate_screen_size(width) when width >= 1440, do: "Desktop"
defp clean_referrer(nil), do: nil
defp clean_referrer(ref) do
uri = URI.parse(ref.referer)
if uri && uri.host && uri.scheme in ["http", "https"] do
host = String.replace_prefix(uri.host, "www.", "")
path = uri.path || ""
host <> String.trim_trailing(path, "/")
end
end
defp parse_body(conn) do
{:ok, body, _conn} = Plug.Conn.read_body(conn)
Jason.decode!(body)
end
defp strip_www(nil), do: nil
defp strip_www(hostname) do
String.replace_prefix(hostname, "www.", "")
end
defp browser_name(ua) do
case ua.client do
:unknown -> ""
%UAInspector.Result.Client{name: "Mobile Safari"} -> "Safari"
%UAInspector.Result.Client{name: "Chrome Mobile"} -> "Chrome"
%UAInspector.Result.Client{name: "Chrome Mobile iOS"} -> "Chrome"
%UAInspector.Result.Client{name: "Firefox Mobile"} -> "Firefox"
%UAInspector.Result.Client{name: "Firefox Mobile iOS"} -> "Firefox"
%UAInspector.Result.Client{name: "Opera Mobile"} -> "Opera"
%UAInspector.Result.Client{name: "Chrome Webview"} -> "Mobile App"
%UAInspector.Result.Client{type: "mobile app"} -> "Mobile App"
client -> client.name
end
end
defp major_minor(:unknown), do: ""
defp major_minor(version) do
version
|> String.split(".")
|> Enum.take(2)
|> Enum.join(".")
end
defp browser_version(ua) do
case ua.client do
:unknown -> ""
%UAInspector.Result.Client{type: "mobile app"} -> ""
client -> major_minor(client.version)
end
end
defp os_name(ua) do
case ua.os do
:unknown -> ""
os -> os.name
end
end
defp os_version(ua) do
case ua.os do
:unknown -> ""
os -> major_minor(os.version)
end
end
defp get_referrer_source(query, ref) do
source = query["utm_source"] || query["source"] || query["ref"]
source || get_source_from_referrer(ref)
end
defp get_source_from_referrer(nil), do: nil
defp get_source_from_referrer(ref) do
case ref.source do
:unknown ->
clean_uri(ref.referer)
source ->
source
end
end
defp clean_uri(uri) do
uri = URI.parse(String.trim(uri))
if uri && uri.host && uri.scheme in ["http", "https"] do
String.replace_leading(uri.host, "www.", "")
end
end
end