feat(template): add Fileserver for download

internal/command/commandline.go

@@ -30,7 +30,7 @@ func HandleCommandline() {
 	} else if help {
 		flag.PrintDefaults()
 	} else {
-		svg.Storage = svg.NewFileStorage(datapath)
+		svg.Storage = svg.NewFileStorage(datapath, "public")
 		server.PrepareHTTP()
 		server.Start()
 	}

internal/server/http.go

@@ -4,22 +4,26 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"path/filepath"
 
 	"tomatentum.net/svg-templater/internal/routes"
 	"tomatentum.net/svg-templater/pkg/auth"
+	"tomatentum.net/svg-templater/pkg/svg"
 )
 
 func PrepareHTTP() {
-	registerAuthorized("/", func(w http.ResponseWriter, r *http.Request) {
+	registerAuthorizedFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		fmt.Fprintln(w, "You are authorized!")
 	})
-	registerAuthorized("/svg/", func(w http.ResponseWriter, r *http.Request) {
+	registerAuthorizedFunc("/svg/", func(w http.ResponseWriter, r *http.Request) {
 		if r.Method != "POST" {
 			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
 			return
 		}
 		routes.CreateSVG(w, *r)
 	})
+
+	registerAuthorized("/public/", http.StripPrefix("/public/", http.FileServer(svg.Storage.GetPublicDir())))
 }
 
 func Start() {
@@ -29,7 +33,15 @@ func Start() {
 	}
 }
 
-func registerAuthorized(path string, f func(w http.ResponseWriter, r *http.Request)) {
+func registerAuthorized(path string, handler http.Handler) {
-	http.HandleFunc(path, auth.AuthMiddleware(http.HandlerFunc(f)))
+	http.HandleFunc(path, auth.AuthMiddleware(handler))
 	log.Println("Registered authorized handler for", path)
 }
+
+func registerAuthorizedFunc(path string, f func(w http.ResponseWriter, r *http.Request)) {
+	registerAuthorized(path, http.HandlerFunc(f))
+}
+
+func GetPublicPath(path string) string {
+	return filepath.Join("public", path)
+}

pkg/svg/storage.go

@@ -3,6 +3,7 @@ package svg
 import (
 	"io"
 	"log"
+	"net/http"
 	"os"
 	"path/filepath"
 )
@@ -12,22 +13,23 @@ type SvgStorage interface {
 	Get(id string) (io.ReadCloser, error)
 	CreatePublic(data io.Reader, filetype string) (string, error)
 	GetPublic(path string) (io.ReadCloser, error)
+	GetPublicDir() http.Dir
 }
 
 var _ SvgStorage = FileSvgStorage{}
 var TempDir string = ""
 
 type FileSvgStorage struct {
-	basepath string
+	basepath, publicSubPath string
 }
 
-func NewFileStorage(path string) *FileSvgStorage {
+func NewFileStorage(path, publicSubPath string) *FileSvgStorage {
 	err := os.MkdirAll(path, 0755)
 	if err != nil {
 		panic(err)
 	}
 	log.Println("Initialized file storage handler")
-	return &FileSvgStorage{path}
+	return &FileSvgStorage{path, publicSubPath}
 }
 
 func (f FileSvgStorage) Create(id string, svg io.Reader) (string, error) {
@@ -56,7 +58,7 @@ func (f FileSvgStorage) Get(id string) (io.ReadCloser, error) {
 }
 
 func (f FileSvgStorage) CreatePublic(data io.Reader, filetype string) (string, error) {
-	path := filepath.Join(f.basepath, "public")
+	path := filepath.Join(f.basepath, f.publicSubPath)
 	if err := os.Mkdir(path, 0755); err != nil {
 		return "", err
 	}
@@ -71,13 +73,17 @@ func (f FileSvgStorage) CreatePublic(data io.Reader, filetype string) (string, e
 }
 
 func (f FileSvgStorage) GetPublic(path string) (io.ReadCloser, error) {
-	file, err := os.Open(filepath.Join(f.basepath, "public", path))
+	file, err := os.Open(filepath.Join(f.basepath, f.publicSubPath, path))
 	if err != nil {
 		return nil, err
 	}
 	return file, nil
 }
 
+func (f FileSvgStorage) GetPublicDir() http.Dir {
+	return http.Dir(filepath.Join(f.basepath, f.publicSubPath))
+}
+
 func CreateTemp(data io.Reader, filetype string) (string, error) {
 	file, err := os.CreateTemp(TempDir, "*."+filetype)
 	if err != nil {