Need to have a way to save custom fields etc while parsing

[virunew]

It maybe relevant for other people too, I need a capability to save some file metadata in custom_field1 , custom_field2 etc. at the time of parsinf pdf documents. Currently pdf parsing is in a c library whose source is not shared , so perhaps:

1. C source cam be shared too
2. Or provide parsing API documentation and add capability in the parsing API to add all custom fields which exist in mongo database schema