Merge pull request #57 from topcoder-platform/feature_ubhan_universalUID_changes

feature_ubhan_universalUID_changes

Author: Dushyant Bhalgami

src/common/helper.js

@@ -188,6 +188,10 @@ function getPageLink(req, page) {
  */
 function setResHeaders(req, res, result) {
   const totalPages = Math.ceil(result.total / result.perPage)
+  if (result.page > 1) {
+    res.set('X-Prev-Page', result.page - 1)
+  }
+  
   if (result.page < totalPages) {
     res.set('X-Next-Page', result.page + 1)
   }
@@ -206,6 +210,14 @@ function setResHeaders(req, res, result) {
     }
     res.set('Link', link)
   }
+
+  // Allow browsers access pagination data in headers
+  let accessControlExposeHeaders = res.get('Access-Control-Expose-Headers') || ''
+  accessControlExposeHeaders += accessControlExposeHeaders ? ', ' : ''
+  // append new values, to not override values set by someone else
+  accessControlExposeHeaders += 'X-Page, X-Per-Page, X-Total, X-Total-Pages, X-Prev-Page, X-Next-Page'
+
+  res.set('Access-Control-Expose-Headers', accessControlExposeHeaders)
 }
 
 /**