S3 headers (#2830)

* change s3 headers for playlist files

* clean up code

---------

Co-authored-by: Gabe Kangas <gabek@real-ity.com>

core/storageproviders/s3Storage.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"path"
 	"path/filepath"
 	"strings"
 	"time"
@@ -149,6 +150,7 @@ func (s *S3Storage) Save(filePath string, retryCount int) (string, error) {
 
 	maxAgeSeconds := utils.GetCacheDurationSecondsForPath(filePath)
 	cacheControlHeader := fmt.Sprintf("max-age=%d", maxAgeSeconds)
+
 	uploadInput := &s3manager.UploadInput{
 		Bucket:       aws.String(s.s3Bucket), // Bucket to be used
 		Key:          aws.String(remotePath), // Name of the file to be saved
@@ -156,6 +158,14 @@ func (s *S3Storage) Save(filePath string, retryCount int) (string, error) {
 		CacheControl: &cacheControlHeader,
 	}
 
+	if path.Ext(filePath) == ".m3u8" {
+		noCacheHeader := "no-cache, no-store, must-revalidate"
+		contentType := "application/x-mpegURL"
+
+		uploadInput.CacheControl = &noCacheHeader
+		uploadInput.ContentType = &contentType
+	}
+
 	if s.s3ACL != "" {
 		uploadInput.ACL = aws.String(s.s3ACL)
 	} else {