摘要：例如实际调用特殊字符要报文体省略转化为只获取字段且中字段，按中字段降序排序
Date math support in index names
Limiting the number of indices that are searched reduces the load on the cluster and improves execution performance.
form:
例如：
GET /,,/_search
实际调用特殊字符要encode：GET /%3Clogstash-%7Bnow%2Fd-2d%7D%3E%2C%3Clogstash-%7Bnow%2Fd-1d%7D%3E%2C%3Clogstash-%7Bnow%2Fd%7D%3E/_search
报文体省略
Common options
appending ?pretty=true to any request made, the JSON returned will be pretty formatted (use it for debugging only!).
"size_in_bytes": 1024 转化为 "size_in_bytes": "1kb" by adding ?human=true to the query string.
Response Filtering
GET /_cluster/state?filter_path=metadata.indices.*.stat*
Responds:
{
"metadata" : {
"indices" : {
"twitter": {"state": "open"}
}
}
}
the ** wildcard can be used to include fields without knowing the exact path of the field.
exclude one or more fields by prefixing the filter with the char -:
GET /_count?filter_path=-_shards
both inclusive and exclusive filters can be combined in the same expression.
raw value of a field, like the _source field.
# 只获取hits.hits._source字段且_source中title字段，按_source中rating字段降序排序
GET /_search?filter_path=hits.hits._source&_source=title&sort=rating:desc
Enabling stack traces： url append error_trace=true
URL-based access control
elasticsearch.yml file:
rest.action.multi.allow_explicit_index: false
Elasticsearch will reject requests that have an explicit index specified in the request body.
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