Merge branch 'master' into PLT-11-email

api/file.go

@@ -24,6 +24,7 @@ import (
 	"io"
 	"io/ioutil"
 	"math"
+	"mime"
 	"net/http"
 	"net/url"
 	"os"
@@ -424,7 +425,7 @@ func getFile(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	w.Header().Set("Cache-Control", "max-age=2592000, public")
 	w.Header().Set("Content-Length", strconv.Itoa(len(f)))
-	w.Header().Set("Content-Type", "") // need to provide proper Content-Type in the future
+	w.Header().Set("Content-Type", mime.TypeByExtension(filepath.Ext(filename)))
 	w.Write(f)
 }