Fix handline of large file uploads and properly show any errors that may occur. Fixes #2153

web/pgadmin/misc/file_manager/__init__.py

@@ -886,10 +886,14 @@ class Filemanager(object):
             newName = u"{0}{1}".format(orig_path, file_name)
 
             with open(newName, 'wb') as f:
-                f.write(file_obj.read())
+                while True:
+                    data = file_obj.read(4194304)  # 4MB chunk (4 * 1024 * 1024 Bytes)
+                    if not data:
+                        break
+                    f.write(data)
         except Exception as e:
             code = 0
-            err_msg = u"Error: {0}".format(e.strerror)
+            err_msg = u"Error: {0}".format(e.strerror if hasattr(e, 'strerror') else u'Unknown')
 
         try:
             Filemanager.check_access_permission(dir, path)

web/pgadmin/misc/file_manager/templates/file_manager/js/utility.js

@@ -1624,7 +1624,7 @@ if (has_capability(data, 'upload')) {
       complete: function(file) {
         if (file.status == "error") {
           var alertifyWrapper = new AlertifyWrapper();
-          alertifyWrapper.error(lg.ERROR_UPLOADING_FILE);
+          alertifyWrapper.error(lg.upload_error);
         }
         $('.upload_file .dz_cross_btn').removeAttr('disabled');
         getFolderInfo(path);