HTTP proxy support for outgoing request, manage access to hidden service (#7134)

* Add support for HTTP client proxy

* Add access control for darknet

Supress error when access to darknet via transparent proxy

* Fix the codes pointed out

* Lint

* Fix an omission + lint

* any? -> include?

* Change detection method to regexp to avoid test fail

1 files changed, 24 insertions, 0 deletions

diff --git a/config/initializers/http_client_proxy.rb b/config/initializers/http_client_proxy.rb
new file mode 100644
index 000000000..f5026d59e
--- /dev/null
+++ b/config/initializers/http_client_proxy.rb
@@ -0,0 +1,24 @@
+Rails.application.configure do
+  config.x.http_client_proxy = {}
+  if ENV['http_proxy'].present?
+    proxy = URI.parse(ENV['http_proxy'])
+    raise "Unsupported proxy type: #{proxy.scheme}" unless %w(http https).include? proxy.scheme
+    raise "No proxy host" unless proxy.host
+
+    host = proxy.host
+    host = host[1...-1] if host[0] == '[' #for IPv6 address
+    config.x.http_client_proxy[:proxy] = { proxy_address: host, proxy_port: proxy.port, proxy_username: proxy.user, proxy_password: proxy.password }.compact
+  end
+
+  config.x.access_to_hidden_service = ENV['ALLOW_ACCESS_TO_HIDDEN_SERVICE'] == 'true'
+  config.x.hidden_service_via_transparent_proxy = ENV['HIDDEN_SERVICE_VIA_TRANSPARENT_PROXY'] == 'true'
+end
+
+module Goldfinger
+  def self.finger(uri, opts = {})
+    to_hidden = /\.(onion|i2p)(:\d+)?$/.match(uri)
+    raise Mastodon::HostValidationError, 'Instance does not support hidden service connections' if !Rails.configuration.x.access_to_hidden_service && to_hidden
+    opts = opts.merge(Rails.configuration.x.http_client_proxy).merge(ssl: !to_hidden)
+    Goldfinger::Client.new(uri, opts).finger
+  end
+end