Best way to index base64 encoded string into ElasticSearch

Question

I'm using Spring-Data-ElasticSearch to index a whole object as a document in Elastic. One of the field is a String typed base64 encoding of user upload file.

@Document(indexName = "user_record")
public class UserRecord {

    private String base64UserUploadFile;

...

Currently this base64 string is indexed directly into Elastic so not searchable, so I'm wondering what's my options here if I want to be able to search the actual content from that file without having to convert this field to be the actual file content string in my class?

Val · Accepted Answer · 2016-07-28 04:23:09Z

1

You might want to use the mapper-attachments plugin and declare your field with the Attachment field type

@Document(indexName = "user_record")
public class UserRecord {

    @FieldType(type = FieldType.Attachment, store = false)
    private String base64UserUploadFile;

...

That way the Base64 content will be indexed and searchable. I suggest not to store the content (hence store=false) if you don't want to inflate your index unnecessarily.

edited Jul 28, 2016 at 4:23

answered Jul 28, 2016 at 4:12

Val

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2 Comments

Val Over a year ago

Have you been able to try this out?

Derek Over a year ago

Sorry I haven't been able to get it working. I did look into it but turned out the ES used in our current project is too old, 1.7.2, with Spring Data ES 1.5 which doesn't have native support for mapper-attachment. So right now I'm trying to upgrade ES but some effort is needed as this ES is used by other components in our project as well.

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