[#2497] Configurability of :min_content_length (preview proxy). Refactoring, documentation, tests.

This commit is contained in:
Ivan Tashkinov 2020-09-17 17:13:40 +03:00
parent a781f41f96
commit 7cdbd91d83
8 changed files with 329 additions and 63 deletions

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@ -444,7 +444,8 @@ config :pleroma, :media_preview_proxy,
enabled: false,
thumbnail_max_width: 600,
thumbnail_max_height: 600,
image_quality: 85
image_quality: 85,
min_content_length: 100 * 1024
config :pleroma, :chat, enabled: true

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@ -1961,17 +1961,25 @@ config :pleroma, :config_description, [
%{
key: :thumbnail_max_width,
type: :integer,
description: "Max width of preview thumbnail."
description:
"Max width of preview thumbnail for images (video preview always has original dimensions)."
},
%{
key: :thumbnail_max_height,
type: :integer,
description: "Max height of preview thumbnail."
description:
"Max height of preview thumbnail for images (video preview always has original dimensions)."
},
%{
key: :image_quality,
type: :integer,
description: "Quality of the output. Ranges from 0 (min quality) to 100 (max quality)."
},
%{
key: :min_content_length,
type: :integer,
description:
"Min content length to perform preview, in bytes. If greater than 0, media smaller in size will be served as is, without thumbnailing."
}
]
},

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@ -314,6 +314,14 @@ This section describe PWA manifest instance-specific values. Currently this opti
* `enabled`: Enables purge cache
* `provider`: Which one of the [purge cache strategy](#purge-cache-strategy) to use.
## :media_preview_proxy
* `enabled`: Enables proxying of remote media preview to the instances proxy. Requires enabled media proxy (`media_proxy/enabled`).
* `thumbnail_max_width`: Max width of preview thumbnail for images (video preview always has original dimensions).
* `thumbnail_max_height`: Max height of preview thumbnail for images (video preview always has original dimensions).
* `image_quality`: Quality of the output. Ranges from 0 (min quality) to 100 (max quality).
* `min_content_length`: Min content length to perform preview, in bytes. If greater than 0, media smaller in size will be served as is, without thumbnailing.
### Purge cache strategy
#### Pleroma.Web.MediaProxy.Invalidation.Script

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@ -58,6 +58,7 @@ defmodule Pleroma.Helpers.MediaHelper do
defp prepare_image_resize_args(_), do: {:error, :missing_options}
# Note: video thumbnail is intentionally not resized (always has original dimensions)
def video_framegrab(url) do
with executable when is_binary(executable) <- System.find_executable("ffmpeg"),
{:ok, env} <- HTTP.get(url, [], pool: :media),

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@ -12,8 +12,6 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
alias Pleroma.Web.MediaProxy
alias Plug.Conn
@min_content_length_for_preview 100 * 1024
def remote(conn, %{"sig" => sig64, "url" => url64}) do
with {_, true} <- {:enabled, MediaProxy.enabled?()},
{:ok, url} <- MediaProxy.decode_url(sig64, url64),
@ -37,7 +35,8 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
def preview(%Conn{} = conn, %{"sig" => sig64, "url" => url64}) do
with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
{:ok, url} <- MediaProxy.decode_url(sig64, url64) do
{:ok, url} <- MediaProxy.decode_url(sig64, url64),
:ok <- MediaProxy.verify_request_path_and_url(conn, url) do
handle_preview(conn, url)
else
{:enabled, false} ->
@ -59,8 +58,25 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
content_type = Tesla.get_header(head_response, "content-type")
content_length = Tesla.get_header(head_response, "content-length")
content_length = content_length && String.to_integer(content_length)
static = conn.params["static"] in ["true", true]
handle_preview(content_type, content_length, conn, media_proxy_url)
cond do
static and content_type == "image/gif" ->
handle_jpeg_preview(conn, media_proxy_url)
static ->
drop_static_param_and_redirect(conn)
content_type == "image/gif" ->
redirect(conn, external: media_proxy_url)
min_content_length_for_preview() > 0 and content_length > 0 and
content_length < min_content_length_for_preview() ->
redirect(conn, external: media_proxy_url)
true ->
handle_preview(content_type, conn, media_proxy_url)
end
else
# If HEAD failed, redirecting to media proxy URI doesn't make much sense; returning an error
{_, %{status: status}} ->
@ -74,58 +90,27 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
end
end
defp handle_preview(
"image/gif" = _content_type,
_content_length,
%{params: %{"static" => static}} = conn,
media_proxy_url
)
when static in ["true", true] do
handle_jpeg_preview(conn, media_proxy_url)
end
defp handle_preview(
_content_type,
_content_length,
%{params: %{"static" => static}} = conn,
_media_proxy_url
)
when static in ["true", true] do
uri_without_static_param = UriHelper.modify_uri_params(current_url(conn), %{}, ["static"])
redirect(conn, external: uri_without_static_param)
end
defp handle_preview("image/gif" = _content_type, _content_length, conn, media_proxy_url) do
redirect(conn, external: media_proxy_url)
end
defp handle_preview("image/" <> _ = _content_type, content_length, conn, media_proxy_url)
when is_integer(content_length) and content_length > 0 and
content_length < @min_content_length_for_preview do
redirect(conn, external: media_proxy_url)
end
defp handle_preview("image/png" <> _ = _content_type, _content_length, conn, media_proxy_url) do
defp handle_preview("image/png" <> _ = _content_type, conn, media_proxy_url) do
handle_png_preview(conn, media_proxy_url)
end
defp handle_preview("image/" <> _ = _content_type, _content_length, conn, media_proxy_url) do
defp handle_preview("image/" <> _ = _content_type, conn, media_proxy_url) do
handle_jpeg_preview(conn, media_proxy_url)
end
defp handle_preview("video/" <> _ = _content_type, _content_length, conn, media_proxy_url) do
defp handle_preview("video/" <> _ = _content_type, conn, media_proxy_url) do
handle_video_preview(conn, media_proxy_url)
end
defp handle_preview(_unsupported_content_type, _content_length, conn, media_proxy_url) do
defp handle_preview(_unsupported_content_type, conn, media_proxy_url) do
fallback_on_preview_error(conn, media_proxy_url)
end
defp handle_png_preview(conn, media_proxy_url) do
quality = Config.get!([:media_preview_proxy, :image_quality])
{thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(),
{:ok, thumbnail_binary} <-
with {:ok, thumbnail_binary} <-
MediaHelper.image_resize(
media_proxy_url,
%{
@ -146,9 +131,9 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
defp handle_jpeg_preview(conn, media_proxy_url) do
quality = Config.get!([:media_preview_proxy, :image_quality])
{thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
with {thumbnail_max_width, thumbnail_max_height} <- thumbnail_max_dimensions(),
{:ok, thumbnail_binary} <-
with {:ok, thumbnail_binary} <-
MediaHelper.image_resize(
media_proxy_url,
%{max_width: thumbnail_max_width, max_height: thumbnail_max_height, quality: quality}
@ -174,6 +159,15 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
end
end
defp drop_static_param_and_redirect(conn) do
uri_without_static_param =
conn
|> current_url()
|> UriHelper.modify_uri_params(%{}, ["static"])
redirect(conn, external: uri_without_static_param)
end
defp fallback_on_preview_error(conn, media_proxy_url) do
redirect(conn, external: media_proxy_url)
end
@ -189,7 +183,7 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
end
defp thumbnail_max_dimensions do
config = Config.get([:media_preview_proxy], [])
config = media_preview_proxy_config()
thumbnail_max_width = Keyword.fetch!(config, :thumbnail_max_width)
thumbnail_max_height = Keyword.fetch!(config, :thumbnail_max_height)
@ -197,6 +191,14 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyController do
{thumbnail_max_width, thumbnail_max_height}
end
defp min_content_length_for_preview do
Keyword.get(media_preview_proxy_config(), :min_content_length, 0)
end
defp media_preview_proxy_config do
Config.get!([:media_preview_proxy])
end
defp media_proxy_opts do
Config.get([:media_proxy, :proxy_opts], [])
end

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@ -14,7 +14,15 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyControllerTest do
on_exit(fn -> Cachex.clear(:banned_urls_cache) end)
end
test "it returns 404 when MediaProxy disabled", %{conn: conn} do
describe "Media Proxy" do
setup do
clear_config([:media_proxy, :enabled], true)
clear_config([Pleroma.Web.Endpoint, :secret_key_base], "00000000000")
[url: MediaProxy.encode_url("https://google.fn/test.png")]
end
test "it returns 404 when disabled", %{conn: conn} do
clear_config([:media_proxy, :enabled], false)
assert %Conn{
@ -28,13 +36,6 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyControllerTest do
} = get(conn, "/proxy/hhgfh/eeee/fff")
end
describe "" do
setup do
clear_config([:media_proxy, :enabled], true)
clear_config([Pleroma.Web.Endpoint, :secret_key_base], "00000000000")
[url: MediaProxy.encode_url("https://google.fn/test.png")]
end
test "it returns 403 for invalid signature", %{conn: conn, url: url} do
Pleroma.Config.put([Pleroma.Web.Endpoint, :secret_key_base], "000")
%{path: path} = URI.parse(url)
@ -55,7 +56,7 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyControllerTest do
} = get(conn, "/proxy/hhgfh/eeee/fff")
end
test "redirects on valid url when filename is invalidated", %{conn: conn, url: url} do
test "redirects to valid url when filename is invalidated", %{conn: conn, url: url} do
invalid_url = String.replace(url, "test.png", "test-file.png")
response = get(conn, invalid_url)
assert response.status == 302
@ -78,4 +79,249 @@ defmodule Pleroma.Web.MediaProxy.MediaProxyControllerTest do
end
end
end
describe "Media Preview Proxy" do
setup do
clear_config([:media_proxy, :enabled], true)
clear_config([:media_preview_proxy, :enabled], true)
clear_config([Pleroma.Web.Endpoint, :secret_key_base], "00000000000")
original_url = "https://google.fn/test.png"
[
url: MediaProxy.encode_preview_url(original_url),
media_proxy_url: MediaProxy.encode_url(original_url)
]
end
test "returns 404 when media proxy is disabled", %{conn: conn} do
clear_config([:media_proxy, :enabled], false)
assert %Conn{
status: 404,
resp_body: "Not Found"
} = get(conn, "/proxy/preview/hhgfh/eeeee")
assert %Conn{
status: 404,
resp_body: "Not Found"
} = get(conn, "/proxy/preview/hhgfh/fff")
end
test "returns 404 when disabled", %{conn: conn} do
clear_config([:media_preview_proxy, :enabled], false)
assert %Conn{
status: 404,
resp_body: "Not Found"
} = get(conn, "/proxy/preview/hhgfh/eeeee")
assert %Conn{
status: 404,
resp_body: "Not Found"
} = get(conn, "/proxy/preview/hhgfh/fff")
end
test "it returns 403 for invalid signature", %{conn: conn, url: url} do
Pleroma.Config.put([Pleroma.Web.Endpoint, :secret_key_base], "000")
%{path: path} = URI.parse(url)
assert %Conn{
status: 403,
resp_body: "Forbidden"
} = get(conn, path)
assert %Conn{
status: 403,
resp_body: "Forbidden"
} = get(conn, "/proxy/preview/hhgfh/eeee")
assert %Conn{
status: 403,
resp_body: "Forbidden"
} = get(conn, "/proxy/preview/hhgfh/eeee/fff")
end
test "redirects to valid url when filename is invalidated", %{conn: conn, url: url} do
invalid_url = String.replace(url, "test.png", "test-file.png")
response = get(conn, invalid_url)
assert response.status == 302
assert redirected_to(response) == url
end
test "responds with 424 Failed Dependency if HEAD request to media proxy fails", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 500, body: ""}
end)
response = get(conn, url)
assert response.status == 424
assert response.resp_body == "Can't fetch HTTP headers (HTTP 500)."
end
test "redirects to media proxy URI on unsupported content type", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "application/pdf"}]}
end)
response = get(conn, url)
assert response.status == 302
assert redirected_to(response) == media_proxy_url
end
test "with `static=true` and GIF image preview requested, responds with JPEG image", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
# Setting a high :min_content_length to ensure this scenario is not affected by its logic
clear_config([:media_preview_proxy, :min_content_length], 1_000_000_000)
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{
status: 200,
body: "",
headers: [{"content-type", "image/gif"}, {"content-length", "1001718"}]
}
%{method: :get, url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.gif")}
end)
response = get(conn, url <> "?static=true")
assert response.status == 200
assert Conn.get_resp_header(response, "content-type") == ["image/jpeg"]
assert response.resp_body != ""
end
test "with GIF image preview requested and no `static` param, redirects to media proxy URI",
%{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "image/gif"}]}
end)
response = get(conn, url)
assert response.status == 302
assert redirected_to(response) == media_proxy_url
end
test "with `static` param and non-GIF image preview requested, " <>
"redirects to media preview proxy URI without `static` param",
%{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "image/jpeg"}]}
end)
response = get(conn, url <> "?static=true")
assert response.status == 302
assert redirected_to(response) == url
end
test "with :min_content_length setting not matched by Content-Length header, " <>
"redirects to media proxy URI",
%{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
clear_config([:media_preview_proxy, :min_content_length], 100_000)
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{
status: 200,
body: "",
headers: [{"content-type", "image/gif"}, {"content-length", "5000"}]
}
end)
response = get(conn, url)
assert response.status == 302
assert redirected_to(response) == media_proxy_url
end
test "thumbnails PNG images into PNG", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "image/png"}]}
%{method: :get, url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.png")}
end)
response = get(conn, url)
assert response.status == 200
assert Conn.get_resp_header(response, "content-type") == ["image/png"]
assert response.resp_body != ""
end
test "thumbnails JPEG images into JPEG", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "image/jpeg"}]}
%{method: :get, url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: File.read!("test/fixtures/image.jpg")}
end)
response = get(conn, url)
assert response.status == 200
assert Conn.get_resp_header(response, "content-type") == ["image/jpeg"]
assert response.resp_body != ""
end
test "redirects to media proxy URI in case of thumbnailing error", %{
conn: conn,
url: url,
media_proxy_url: media_proxy_url
} do
Tesla.Mock.mock(fn
%{method: "head", url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "", headers: [{"content-type", "image/jpeg"}]}
%{method: :get, url: ^media_proxy_url} ->
%Tesla.Env{status: 200, body: "<html><body>error</body></html>"}
end)
response = get(conn, url)
assert response.status == 302
assert redirected_to(response) == media_proxy_url
end
end
end