feat(ui): add audio upload button in chat view (#5526)

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

pkg/utils/base64.go

@@ -5,14 +5,19 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"regexp"
 	"strings"
 	"time"
+
+	"github.com/rs/zerolog/log"
 )
 
 var base64DownloadClient http.Client = http.Client{
 	Timeout: 30 * time.Second,
 }
 
+var dataURIPattern = regexp.MustCompile(`^data:([^;]+);base64,`)
+
 // GetContentURIAsBase64 checks if the string is an URL, if it's an URL downloads the content in memory encodes it in base64 and returns the base64 string, otherwise returns the string by stripping base64 data headers
 func GetContentURIAsBase64(s string) (string, error) {
 	if strings.HasPrefix(s, "http") {
@@ -36,12 +41,11 @@ func GetContentURIAsBase64(s string) (string, error) {
 		return encoded, nil
 	}
 
-	// if the string instead is prefixed with "data:image/...;base64,", drop it
-	dropPrefix := []string{"data:image/jpeg;base64,", "data:image/png;base64,"}
-	for _, prefix := range dropPrefix {
-		if strings.HasPrefix(s, prefix) {
-			return strings.ReplaceAll(s, prefix, ""), nil
-		}
+	// Match any data URI prefix pattern
+	if match := dataURIPattern.FindString(s); match != "" {
+		log.Debug().Msgf("Found data URI prefix: %s", match)
+		return strings.Replace(s, match, "", 1), nil
 	}
-	return "", fmt.Errorf("not valid string")
+
+	return "", fmt.Errorf("not valid base64 data type string")
 }