elasticsearch - ElasticSearch无法识别定义了编码的Context-Type header

Question

我花了一些时间尝试修复 flex 搜索批量上传警告:

Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header

我的要求如下:

POST http://elasticserver/_bulk HTTP/1.1
Authorization: xxx
Content-Type: application/x-ndjson; charset=utf-8
Host: elasticserver
Content-Length: 8559

... new line delimited json content ...

我的200位有效回复如下:

HTTP/1.1 200 OK
Warning: 299 Elasticsearch-5.5.1-19c13d0 "Content type detection for rest requests is deprecated. Specify the content type using the [Content-Type] header." "Mon, 14 Aug 2017 00:46:21 GMT"
content-type: application/json; charset=UTF-8
content-length: 4183

{"took":5538,"errors":false,...}

通过实验，我发现问题出在内容类型字符集定义 Content-Type: application/x-ndjson; charset=utf-8中，如果将其更改为 Content-Type: application/x-ndjson，则不会收到任何警告。

是 flex 搜索问题，还是我的请求格式不正确？

Answer 1

official documentation明确指出

When sending requests to this endpoint the Content-Type header should be set to application/x-ndjson.

RestController source code还表明他们忽略了字符集:

final String lowercaseMediaType = restRequest.header("Content-Type").toLowerCase(Locale.ROOT);
// we also support newline delimited JSON: http://specs.okfnlabs.org/ndjson/
if (lowercaseMediaType.equals("application/x-ndjson")) {
    restRequest.setXContentType(XContentType.JSON);
    return true;
}