Default more not to gzip since gzip can be done on client side.

weed-fs/src/pkg/storage/compress.go

@@ -8,7 +8,13 @@ import (
 	"strings"
 )
 
+/*
+* Default more not to gzip since gzip can be done on client side.
+*/
 func IsGzippable(ext, mtype string) bool {
+    if strings.HasPrefix(mtype, "text/"){
+        return true
+    }
 	if ext == ".zip" {
 		return false
 	}
@@ -18,12 +24,26 @@ func IsGzippable(ext, mtype string) bool {
 	if ext == ".gz" {
 		return false
 	}
-  if strings.Index(mtype,"text/")==0 {
+	if ext == ".pdf" {
 		return true
 	}
-  if strings.Index(mtype,"application/")==0 {
+	if ext == ".css" {
 		return true
 	}
+	if ext == ".js" {
+		return true
+	}
+    if ext == ".json" {
+        return true
+    }
+	if strings.HasPrefix(mtype, "application/") {
+		if strings.HasSuffix(mtype, "xml") {
+			return true
+		}
+		if strings.HasSuffix(mtype, "script") {
+			return true
+		}
+	}
 	return false
 }
 func GzipData(input []byte) []byte {