Add custom served folders

pkg/api/server.go

@@ -251,6 +251,24 @@ func Start() {
 	})
 
 	startThumbCache()
+
+	// Serve static folders
+	customServedFolders := config.GetCustomServedFolders()
+	if customServedFolders != nil {
+		r.HandleFunc("/custom/*", func(w http.ResponseWriter, r *http.Request) {
+			r.URL.Path = strings.Replace(r.URL.Path, "/custom", "", 1)
+
+			// map the path to the applicable filesystem location
+			var dir string
+			r.URL.Path, dir = customServedFolders.GetFilesystemLocation(r.URL.Path)
+			if dir != "" {
+				http.FileServer(http.Dir(dir)).ServeHTTP(w, r)
+			} else {
+				http.NotFound(w, r)
+			}
+		})
+	}
+
 	// Serve the web app
 	r.HandleFunc("/*", func(w http.ResponseWriter, r *http.Request) {
 		ext := path.Ext(r.URL.Path)

pkg/manager/config/config.go

@@ -47,6 +47,10 @@ const ScraperUserAgent = "scraper_user_agent"
 // i18n
 const Language = "language"
 
+// served directories
+// this should be manually configured only
+const CustomServedFolders = "custom_served_folders"
+
 // Interface options
 const SoundOnPreview = "sound_on_preview"
 const WallShowTitle = "wall_show_title"
@@ -231,6 +235,12 @@ func GetMaxSessionAge() int {
 	return viper.GetInt(MaxSessionAge)
 }
 
+// GetCustomServedFolders gets the map of custom paths to their applicable
+// filesystem locations
+func GetCustomServedFolders() URLMap {
+	return viper.GetStringMapString(CustomServedFolders)
+}
+
 // Interface options
 func GetSoundOnPreview() bool {
 	viper.SetDefault(SoundOnPreview, true)

pkg/manager/config/urlmap.go

@@ -0,0 +1,21 @@
+package config
+
+import "strings"
+
+type URLMap map[string]string
+
+// GetFilesystemLocation returns the adjusted URL and the filesystem location
+func (m URLMap) GetFilesystemLocation(url string) (string, string) {
+	root := m["/"]
+	for k, v := range m {
+		if k != "/" && strings.HasPrefix(url, k) {
+			return strings.TrimPrefix(url, k), v
+		}
+	}
+
+	if root != "" {
+		return url, root
+	}
+
+	return url, ""
+}

pkg/manager/config/urlmap_test.go

@@ -0,0 +1,28 @@
+package config
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestURLMapGetFilesystemLocation(t *testing.T) {
+	// create the URLMap
+	urlMap := make(URLMap)
+	urlMap["/"] = "root"
+	urlMap["/foo"] = "bar"
+
+	url, fs := urlMap.GetFilesystemLocation("/foo/bar")
+	assert.Equal(t, "/bar", url)
+	assert.Equal(t, urlMap["/foo"], fs)
+
+	url, fs = urlMap.GetFilesystemLocation("/bar")
+	assert.Equal(t, "/bar", url)
+	assert.Equal(t, urlMap["/"], fs)
+
+	delete(urlMap, "/")
+
+	url, fs = urlMap.GetFilesystemLocation("/bar")
+	assert.Equal(t, "/bar", url)
+	assert.Equal(t, "", fs)
+}