Enable support for compressed response within RestHighLevelClient #63087
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…ghLevelClient (elastic#53533) Added decompression of gzip when gzip value is return as an header from Elasticsearch
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Backport of #53533
This pull request is to enable the RestHighLevelClient to handle an Elasticsearch response which has compressed content. It was already possible to do this with the low level client, see here AsyncElasticsearchCompressedRequest
Compression can enabled within a node configuration with the following property:
http.compression: trueCompression can be triggered by a request from a client. Therefor you also need to provide additional information within the header of the request to Elasticsearch if a client really wants to enable it. That is possible with the following RequestOptions:With these two properties Elasticsearch will return a gzip compressed response body. The RestHighLevelClient can send a request with the above request options but it couldn't handle the response yet. This feature request contains the option to handle a compressed response if it is compressed with gzip.