getCoverArt.view working

api/get_cover_art.go

@@ -0,0 +1,71 @@
+package api
+
+import (
+	"github.com/deluan/gosonic/domain"
+	"github.com/karlkfi/inject"
+	"github.com/deluan/gosonic/utils"
+	"github.com/astaxie/beego"
+	"github.com/deluan/gosonic/api/responses"
+	"io/ioutil"
+"github.com/dhowden/tag"
+	"os"
+)
+
+type GetCoverArtController struct {
+	BaseAPIController
+	repo domain.MediaFileRepository
+}
+
+func (c *GetCoverArtController) Prepare() {
+	inject.ExtractAssignable(utils.Graph, &c.repo)
+}
+
+func (c *GetCoverArtController) Get() {
+	id := c.Input().Get("id")
+	if id == "" {
+		c.SendError(responses.ERROR_MISSING_PARAMETER, "id parameter required")
+	}
+
+	mf, err := c.repo.Get(id)
+	if err != nil {
+		beego.Error("Error reading mediafile", id, "from the database", ":", err)
+		c.SendError(responses.ERROR_GENERIC, "Internal error")
+	}
+
+	var img []byte
+
+	if (mf.HasCoverArt) {
+		img, err = readFromTag(mf.Path)
+		beego.Debug("Serving cover art from", mf.Path)
+	} else {
+		img, err = ioutil.ReadFile("static/default_cover.jpg")
+		beego.Debug("Serving default cover art")
+	}
+
+	if err != nil {
+		beego.Error("Could not retrieve cover art", id, ":", err)
+		c.SendError(responses.ERROR_DATA_NOT_FOUND, "cover art not available")
+	}
+
+
+	c.Ctx.Output.ContentType("image/jpg")
+	c.Ctx.Output.Body(img)
+}
+
+func readFromTag(path string) ([]byte, error) {
+	f, err := os.Open(path)
+	if err != nil {
+		beego.Warn("Error opening file", path, "-", err)
+		return nil, err
+	}
+	defer f.Close()
+
+	m, err := tag.ReadFrom(f)
+	if err != nil {
+		beego.Warn("Error reading tag from file", path, "-", err)
+		return nil, err
+	}
+
+	return m.Picture().Data, nil
+}
+