Blob Store API

The Blob Store REST API allows storing binary objects in Solr. The primary use case for this is to store entity extraction models, lookup lists or exclusion lists for use in index pipelines. This may include the entity extraction models and lookup lists included with Fusion in the $FUSION/data/nlp directory, or files that you have created on your own.

Blobs uploaded to Solr with this REST API are stored in the 'system_blobs' collection.


Upload a file to the blob store:


curl -u user:pass -X PUT --data-binary @airports.lst -H 'Content-type: text/plain' http://localhost:8764/api/apollo/blobs/airports.lst


  "name" : "airports.lst",
  "contentType" : "text/plain",
  "size" : 66,
  "modifiedTime" : "2014-12-03T22:26:16.436Z",
  "version" : 0,
  "md5" : "fbe581898cb426f6bdcabc3f52253594"

Upload an OpenNLP sentence model binary file to the blob store:


curl -u user:pass -X PUT --data-binary @data/nlp/models/en-sent.bin -H 'Content-type: application/octet-stream' http://localhost:8764/api/apollo/blobs/sentenceModel.bin
In this example that we have changed the name of the blob during upload by giving it a different ID. The file is named 'en-sent.bin' but we have defined the ID of this to 'sentenceModel.bin'. When we use this blob in an index pipeline, we would refer to it by the ID we have given it.

Get the manifest for a sentence OpenNLP model we’ve previously saved in the blob store:


curl -u user:pass http://localhost:8764/api/apollo/blobs/sentenceModel.bin/manifest


  "name" : "sentenceModel.bin",
  "contentType" : "application/octet-stream",
  "size" : 98533,
  "modifiedTime" : "2014-09-08T18:50:07.559Z",
  "version" : 1478704189996531712,
  "md5" : "3822c5f82cb4ba139284631d2f6b7fde"