Elasticsearch using the rest API for full-text indexing

Elasticsearch REST API

Elasticsearch supports HTTP request-response service, HTTP requests are broken by default with 9200, so the Curl command allows you to send an HTTP request and get the JSON return content. Common rest APIs include a few:

Check ES cluster status

curl http://localhost:9200/_cat/health?v

Check the status of the ES node

curl http://localhost:9200/_cat/nodes?v

Querying all the Indexes

curl http://localhost:9200/_cat/indices?v

Create an index

curl -XPUT http://localhost:9200/myindex/mytype/id -H ‘Content-Type: application/json‘ -d ‘{"name":"ysl"}‘

Delete Index

curl -XDELETE http://localhost:9200/myindex

Query index

curl -XGET http://localhost:9200/myindex/mytype/id

Add data

curl -XPUT ‘http://localhost:9200/kimchy/doc/1?pretty‘ -H ‘Content-Type: application/json‘ -d ‘{    "user": "kimchy",    "post_date": "2009-11-15T13:12:00",    "message": "Trying out Elasticsearch, so far so good?"}‘

Querying data

curl -XGET ‘http://localhost:9200/kimchy,another_user/_search?pretty=true‘ -H ‘Content-Type: application/json‘ -d ‘{    "query" : {        "match_all" : {}    }}‘

Bulk Add data

Dynamic mapping can't add data, don't worry! You can use the bulk command to add data within a JSON file

Defining JSON data

{"index":{"_index":"test123","_id":1}}{"name":"ysl","age":25}{"index":{"_index":"test123","_id":2}}{"name":"wdd","age":25}{"index":{"_index":"test123","_id":3}}{"name":"yjb","age":25}

Note that the JSON file name is arbitrarily specified, and the first line defines the index and some characters commonly used segments:

• _index defines the name of the index, if you do not specify that you want to add the index name field in the Curl command
• _type defines the type of the index, if you do not specify that you want to add the index type field to the Curl command
• _ID defines the ID of the row's data and, if not specified, randomly generates a string of numbers.

Execute command

Go to the directory where the JSON file is located and execute the command:

curl localhost:9200/索引名称/索引类型/_bulk?pretty --data-binary @data.json

Note that if _index and _type are defined in the JSON file, they are not written here (even if they are written, they are generated as JSON files).

curl localhost:9200/_bulk?pretty --data-binary @data.json

Similarly, if you follow the above definition of _index but do not define _type, then the index is test123 and the type is the type specified in our Curl command.

Execute the above command

 curl http://localhost:9200/test123/test123/_bulk?pretty --data-binary @data.json

Get the following results

{  "took" : 1233,  "errors" : false,  "items" : [ {    "index" : {      "_index" : "test123",      "_type" : "test123",      "_id" : "1",      "_version" : 1,      "_shards" : {        "total" : 2,        "successful" : 1,        "failed" : 0      },      "status" : 201    }  }, {    "index" : {      "_index" : "test123",      "_type" : "test123",      "_id" : "2",      "_version" : 1,      "_shards" : {        "total" : 2,        "successful" : 1,        "failed" : 0      },      "status" : 201    }  } ]}

Elasticsearch using the rest API for full-text indexing