[chore] The Big Middleware and API Refactor (tm) (#1250)

* interim commit: start refactoring middlewares into package under router

* another interim commit, this is becoming a big job

* another fucking massive interim commit

* refactor bookmarks to new style

* ambassador, wiz zeze commits you are spoiling uz

* she compiles, we're getting there

* we're just normal men; we're just innocent men

* apiutil

* whoopsie

* i'm glad noone reads commit msgs haha :blob_sweat:

* use that weirdo go-bytesize library for maxMultipartMemory

* fix media module paths

internal/api/wellknown.go

@@ -0,0 +1,55 @@
+/*
+   GoToSocial
+   Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package api
+
+import (
+	"github.com/superseriousbusiness/gotosocial/internal/api/wellknown/nodeinfo"
+	"github.com/superseriousbusiness/gotosocial/internal/api/wellknown/webfinger"
+	"github.com/superseriousbusiness/gotosocial/internal/middleware"
+	"github.com/superseriousbusiness/gotosocial/internal/processing"
+	"github.com/superseriousbusiness/gotosocial/internal/router"
+)
+
+type WellKnown struct {
+	nodeInfo  *nodeinfo.Module
+	webfinger *webfinger.Module
+}
+
+func (w *WellKnown) Route(r router.Router) {
+	// group .well-known endpoints together
+	wellKnownGroup := r.AttachGroup(".well-known")
+
+	// attach middlewares appropriate for this group
+	wellKnownGroup.Use(
+		middleware.Gzip(),
+		middleware.RateLimit(),
+		// allow .well-known responses to be cached for 2 minutes
+		middleware.CacheControl("public", "max-age=120"),
+	)
+
+	w.nodeInfo.Route(wellKnownGroup.Handle)
+	w.webfinger.Route(wellKnownGroup.Handle)
+}
+
+func NewWellKnown(p processing.Processor) *WellKnown {
+	return &WellKnown{
+		nodeInfo:  nodeinfo.New(p),
+		webfinger: webfinger.New(p),
+	}
+}