Restructure go project (#2356)

* Move main to cmd
* Move api to internal
* Move logger and manager to internal
* Move shell hiding code to separate package
* Decouple job from desktop and utils
* Decouple session from config
* Move static into internal
* Decouple config from dlna
* Move desktop to internal
* Move dlna to internal
* Decouple remaining packages from config
* Move config into internal
* Move jsonschema and paths to models
* Make ffmpeg functions private
* Move file utility methods into fsutil package
* Move symwalk into fsutil
* Move single-use util functions into client package
* Move slice functions to separate packages
* Add env var to suppress windowsgui arg
* Move hash functions into separate package
* Move identify to internal
* Move autotag to internal
* Touch UI when generating backend

internal/api/routes_downloads.go

@@ -0,0 +1,41 @@
+package api
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/go-chi/chi"
+	"github.com/stashapp/stash/internal/manager"
+)
+
+type downloadsRoutes struct{}
+
+func (rs downloadsRoutes) Routes() chi.Router {
+	r := chi.NewRouter()
+
+	r.Route("/{downloadHash}", func(r chi.Router) {
+		r.Use(downloadCtx)
+		r.Get("/{filename}", rs.file)
+	})
+
+	return r
+}
+
+func (rs downloadsRoutes) file(w http.ResponseWriter, r *http.Request) {
+	hash := r.Context().Value(downloadKey).(string)
+	if hash == "" {
+		http.Error(w, http.StatusText(404), 404)
+		return
+	}
+
+	manager.GetInstance().DownloadStore.Serve(hash, w, r)
+}
+
+func downloadCtx(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		downloadHash := chi.URLParam(r, "downloadHash")
+
+		ctx := context.WithValue(r.Context(), downloadKey, downloadHash)
+		next.ServeHTTP(w, r.WithContext(ctx))
+	})
+}