Querying ElasticSearch from Golang

Question

Given a query string in Go like below in Sense

GET employee/info/_search { "query":{ "bool": { "should": [ {"match": {"name": "Rodri"}}, {"match": {"name": "Massadra"}} ] } } }

how to get the response from ElasticSearch. This query works in Sense. This is how I try to do get a response from ElasticSearch: encoding the string and call ElasticSearch

package main import ( "fmt" "io/ioutil" "net/http" "net/url" ) func main() { query := `{ "query":{ "bool": { "should": [ {"match": {"name": "Rodri"}}, {"match": {"name": "Massadra"}} ] } } }` query = url.QueryEscape(query) resp, err := http.Get("http://localhost:9200/employee/info/_search?q=" + query) if err != nil { panic(err) } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) if err != nil { panic(err) } fmt.Printf("\n%s", body) }

and this is the error i got:

{"error":{"root_cause":[{"type":"query_parsing_exception","reason":" Failed to parse query [{\n\t\t\"query\":{\n\t\t\t\"bool\": {\n\t\t\t\t\"should\": [\n\t\t\t\t{\"match\": {\"name\": \"Rodri\"}}, \n\t\t\t\t{\"match\": {\"name\": \"Massadra\"}}\n\t\t\t\t]\n\t\t\t}\n\t\t}\n\t\t}]", "index":"employee"}],"type":"search_phase_execution_exception", "reason":"all shards failed","phase":"query","grouped":true, "failed_shards":[{"shard":0,"index":"employee","node":"EbSLFZXfRCGoqnPcGsoNAg", "reason":{"type":"query_parsing_exception","reason":"Failed to parse query [{\n\t\t\"query\":{\n\t\t\t\"bool\": {\n\t\t\t\t\"should\": [\n\t\t\t\t{\"match\": {\"name\": \"Rodri\"}},\n\t\t\t\t{\"match\": {\"name\": \"Massadra\"}}\n\t\t\t\t]\n\t\t\t}\n\t\t}\n\t\t}]","index":"employee", "caused_by":{"type":"parse_exception","reason": "Cannot parse '{\n\t\t\"query\":{\n\t\t\t\"bool\": {\n\t\t\t\t\"should\": [\n\t\t\t\t{\"match\": {\"name\": \"Rodri\"}},\n\t\t\t\t{\"match\": {\"name\": \"Massadra\"}}\n\t\t\t\t]\n\t\t\t}\n\t\t}\n\t\t}': Encountered \" <RANGE_GOOP> \"[\\n\\t\\t\\t\\t{\\\"match\\\": \"\" at line 1, column 41.\nWas expecting one of:\n \"]\" ...\n \"}\" ...\n ","caused_by":{"type":"parse_exception","reason":"Encountered \" <RANGE_GOOP> \"[\\n\\t\\t\\t\\t{\\\"match\\\": \"\" at line 1, column 41.\nWas expecting one

I also try this client but I didn't find a way to use it from string query.

Thank you

Val · Accepted Answer · 2016-09-04 05:48:38Z

Generally speaking, you should be using POST instead of GET when sending a payload (even if ES accepts payload in GET requests).

Try this code instead:

package main import ( "bytes" "fmt" "io/ioutil" "net/http" ) func main() { url := "http://localhost:9200/employee/info/_search" query := []byte(`{ "query":{ "bool": { "should": [ {"match": {"name": "Rodri"}}, {"match": {"name": "Massadra"}} ] } } }`) req, err := http.NewRequest("POST", url, bytes.NewBuffer(query)) req.Header.Set("Content-Type", "application/json") client := &http.Client{} resp, err := client.Do(req) if err != nil { panic(err) } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) if err != nil { panic(err) } fmt.Printf("\n%s", string(body)) }

Is there a way to make the body pretty print? I add &pretty as ....}&pretty`) to query but it doesn't change.
Yes, you can use something like this: stackoverflow.com/questions/19038598/…

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