[core] Adding toggle for CORS, GZIP in admin/cms configuration (#30)

This PR enables admins to disable/enable CORS and GZIP from within the admin CMS configuration page. Both are enabled by default.

Note: currently, the GZIP implementation is 100% on the fly, for every qualifying API endpoint request. This could add significant CPU usage, but dramatically decreases bandwidth. Will be considering other better implementations, but for now YMMV.

Possible optimizations:
- pooling gzip Writers vs. creating a new one for each response
- caching gzipped responses (in memory? on disk?) 
- enforcing size threshold (only gzip content larger than N bytes) 

1 files changed, 1 insertions, 1 deletions

diff --git a/system/api/external.go b/system/api/external.go
index 662fc07..5d4b302 100644
--- a/system/api/external.go
+++ b/system/api/external.go
@@ -61,7 +61,7 @@ func externalContentHandler(res http.ResponseWriter, req *http.Request) {
 		return
 	}
 
-	ts := fmt.Sprintf("%d", time.Now().Unix()*1000)
+	ts := fmt.Sprintf("%d", int64(time.Nanosecond)*time.Now().UnixNano()/int64(time.Millisecond))
 	req.PostForm.Set("timestamp", ts)
 	req.PostForm.Set("updated", ts)