/
coverart.go
119 lines (99 loc) · 2.53 KB
/
coverart.go
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package api
import (
"bytes"
"fmt"
"github.com/disintegration/imaging"
"github.com/gin-gonic/gin"
"github.com/google/uuid"
"github.com/mlctrez/goapp-audioplayer/goapp"
"image"
_ "image/jpeg"
"image/png"
_ "image/png"
"log"
"net/http"
"strconv"
)
func (a *Api) getCover(ctx *gin.Context) {
uu, err := uuid.Parse(ctx.Param("uuid"))
if err != nil {
ctx.Writer.WriteHeader(http.StatusBadRequest)
return
}
var size int64
sizeQuery := ctx.Query("size")
if sizeQuery != "" {
size, err = strconv.ParseInt(sizeQuery, 10, 64)
if err != nil {
ctx.Writer.WriteHeader(http.StatusBadRequest)
return
}
}
var pngBytes []byte
pngBytes, err = a.c.CoverArt(uu)
if err != nil || len(pngBytes) < 1000 {
var logoBytes []byte
logoBytes, err = goapp.WebFs.ReadFile("web/logo-512.png")
if err != nil {
log.Println(err)
}
ctx.Header("Cache-Control", fmt.Sprintf("max-age=%d", 60*60*3))
ctx.Data(200, "image/png", logoBytes)
return
}
var etag string
if size > 0 {
// deny unreasonable service, else it's denial of service
if size > 800 {
size = 800
}
etag = fmt.Sprintf("%q", fmt.Sprintf("%s_%d", uu.String(), size))
if pngBytes, err = resizeImage(pngBytes, int(size)); err != nil {
fmt.Println(err)
ctx.Status(http.StatusInternalServerError)
return
}
} else {
etag = fmt.Sprintf("%q", uu.String())
}
ctx.Header("Etag", etag)
ctx.Header("Cache-Control", fmt.Sprintf("max-age=%d", 60*60*24*365))
if ctx.GetHeader("If-None-Match") == etag {
ctx.Status(http.StatusNotModified)
} else {
ctx.Data(200, "image/png", pngBytes)
}
}
func resizeImage(imageBytes []byte, size int) (result []byte, err error) {
var img image.Image
if img, err = png.Decode(bytes.NewReader(imageBytes)); err != nil {
return
}
resize := imaging.Resize(img, size, 0, imaging.Lanczos)
buff := &bytes.Buffer{}
if err = png.Encode(buff, resize); err != nil {
return
}
return buff.Bytes(), nil
}
func (a *Api) setCover(ctx *gin.Context) {
defer func() { _ = ctx.Request.Body.Close() }()
uu, err := uuid.Parse(ctx.Param("uuid"))
if err != nil {
fmt.Println("setCover parse", err)
ctx.Writer.WriteHeader(http.StatusBadRequest)
return
}
var img image.Image
if img, _, err = image.Decode(ctx.Request.Body); err != nil {
fmt.Println("setCover decode", err)
ctx.Writer.WriteHeader(http.StatusBadRequest)
return
}
if err = a.c.SetCoverArt(uu, img); err != nil {
fmt.Println("setCover catalog.SetCoverArt", err)
ctx.Writer.WriteHeader(http.StatusBadRequest)
return
}
ctx.Status(http.StatusAccepted)
}