How to index the PDF documents

Elastic Stack Elasticsearch
4

You can use the ingest attachment plugin.

There an example here: https://www.elastic.co/guide/en/elasticsearch/plugins/current/using-ingest-attachment.html

PUT _ingest/pipeline/attachment
{
  "description" : "Extract attachment information",
  "processors" : [
    {
      "attachment" : {
        "field" : "data"
      }
    }
  ]
}
PUT my_index/_doc/my_id?pipeline=attachment
{
  "data": "e1xydGYxXGFuc2kNCkxvcmVtIGlwc3VtIGRvbG9yIHNpdCBhbWV0DQpccGFyIH0="
}
GET my_index/_doc/my_id

The data field is basically the BASE64 representation of your binary file.

You can use FSCrawler. There's a tutorial to help you getting started.

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