[#2497] Media preview proxy: misc. improvements (`static` param support, dynamic...

[akkoma] / lib / pleroma / web / media_proxy / media_proxy.ex

diff --git a/lib/pleroma/web/media_proxy/media_proxy.ex b/lib/pleroma/web/media_proxy/media_proxy.ex
index 217c3f92263c65fa76be6b51e1536f6ed081aa3c..8656b8cad31eb12910d10556ee58f741c34f48a8 100644 (file)
--- a/lib/pleroma/web/media_proxy/media_proxy.ex
+++ b/lib/pleroma/web/media_proxy/media_proxy.ex
@@ -4,62 +4,60 @@
 
 defmodule Pleroma.Web.MediaProxy do
   alias Pleroma.Config
+  alias Pleroma.Helpers.UriHelper
   alias Pleroma.Upload
   alias Pleroma.Web
   alias Pleroma.Web.MediaProxy.Invalidation
 
   @base64_opts [padding: false]
+  @cache_table :banned_urls_cache
+
+  def cache_table, do: @cache_table
 
   @spec in_banned_urls(String.t()) :: boolean()
-  def in_banned_urls(url), do: elem(Cachex.exists?(:banned_urls_cache, url(url)), 1)
+  def in_banned_urls(url), do: elem(Cachex.exists?(@cache_table, url(url)), 1)
 
   def remove_from_banned_urls(urls) when is_list(urls) do
-    Cachex.execute!(:banned_urls_cache, fn cache ->
+    Cachex.execute!(@cache_table, fn cache ->
       Enum.each(Invalidation.prepare_urls(urls), &Cachex.del(cache, &1))
     end)
   end
 
   def remove_from_banned_urls(url) when is_binary(url) do
-    Cachex.del(:banned_urls_cache, url(url))
+    Cachex.del(@cache_table, url(url))
   end
 
   def put_in_banned_urls(urls) when is_list(urls) do
-    Cachex.execute!(:banned_urls_cache, fn cache ->
+    Cachex.execute!(@cache_table, fn cache ->
       Enum.each(Invalidation.prepare_urls(urls), &Cachex.put(cache, &1, true))
     end)
   end
 
   def put_in_banned_urls(url) when is_binary(url) do
-    Cachex.put(:banned_urls_cache, url(url), true)
+    Cachex.put(@cache_table, url(url), true)
   end
 
   def url(url) when is_nil(url) or url == "", do: nil
   def url("/" <> _ = url), do: url
 
   def url(url) do
-    if not enabled?() or not url_proxiable?(url) do
-      url
-    else
+    if enabled?() and url_proxiable?(url) do
       encode_url(url)
+    else
+      url
     end
   end
 
   @spec url_proxiable?(String.t()) :: boolean()
   def url_proxiable?(url) do
-    if local?(url) or whitelisted?(url) do
-      false
-    else
-      true
-    end
+    not local?(url) and not whitelisted?(url)
   end
 
-  # Note: routing all URLs to preview handler (even local and whitelisted).
-  #   Preview handler will call url/1 on decoded URLs, and applicable ones will detour media proxy.
-  def preview_url(url) do
+  def preview_url(url, preview_params \\ []) do
     if preview_enabled?() do
-      encode_preview_url(url)
+      encode_preview_url(url, preview_params)
     else
-      url
+      url(url)
     end
   end
 
@@ -67,7 +65,7 @@ defmodule Pleroma.Web.MediaProxy do
 
   # Note: media proxy must be enabled for media preview proxy in order to load all
   #   non-local non-whitelisted URLs through it and be sure that body size constraint is preserved.
-  def preview_enabled?, do: enabled?() and Config.get([:media_preview_proxy, :enabled], false)
+  def preview_enabled?, do: enabled?() and !!Config.get([:media_preview_proxy, :enabled])
 
   def local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
 
@@ -113,10 +111,10 @@ defmodule Pleroma.Web.MediaProxy do
     build_url(sig64, base64, filename(url))
   end
 
-  def encode_preview_url(url) do
+  def encode_preview_url(url, preview_params \\ []) do
     {base64, sig64} = base64_sig64(url)
 
-    build_preview_url(sig64, base64, filename(url))
+    build_preview_url(sig64, base64, filename(url), preview_params)
   end
 
   def decode_url(sig, url) do
@@ -136,9 +134,13 @@ defmodule Pleroma.Web.MediaProxy do
     if path = URI.parse(url_or_path).path, do: Path.basename(path)
   end
 
+  def base_url do
+    Config.get([:media_proxy, :base_url], Web.base_url())
+  end
+
   defp proxy_url(path, sig_base64, url_base64, filename) do
     [
-      Config.get([:media_proxy, :base_url], Web.base_url()),
+      base_url(),
       path,
       sig_base64,
       url_base64,
@@ -152,8 +154,10 @@ defmodule Pleroma.Web.MediaProxy do
     proxy_url("proxy", sig_base64, url_base64, filename)
   end
 
-  def build_preview_url(sig_base64, url_base64, filename \\ nil) do
-    proxy_url("proxy/preview", sig_base64, url_base64, filename)
+  def build_preview_url(sig_base64, url_base64, filename \\ nil, preview_params \\ []) do
+    uri = proxy_url("proxy/preview", sig_base64, url_base64, filename)
+
+    UriHelper.modify_uri_params(uri, preview_params)
   end
 
   def verify_request_path_and_url(