72 lines
1.4 KiB
Go
72 lines
1.4 KiB
Go
package elasticstream
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import (
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"context"
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"encoding/json"
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"fmt"
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"strings"
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"github.com/elastic/go-elasticsearch/esapi"
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"github.com/elastic/go-elasticsearch/v8"
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)
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// search is calling Elastic Search search API
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func search(client *elasticsearch.Client, from, size int, index string) ([]Data, error) {
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query := fmt.Sprintf(`{
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"query": {
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"match_all": {}
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}
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}`)
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// Create the search request
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req := esapi.SearchRequest{
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Index: []string{index},
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Body: strings.NewReader(query),
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// From: from,
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// Size: size,
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}
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// Perform the request
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res, err := req.Do(context.Background(), client)
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if err != nil {
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return nil, fmt.Errorf("error getting response: %s", err)
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}
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defer res.Body.Close()
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if res.IsError() {
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return nil, fmt.Errorf("error: %s", res.String())
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}
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// Parse the response
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var result struct {
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Hits struct {
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Hits []struct {
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Source map[string]interface{} `json:"_source"`
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} `json:"hits"`
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} `json:"hits"`
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}
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if err := json.NewDecoder(res.Body).Decode(&result); err != nil {
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return nil, fmt.Errorf("error parsing the response body: %s", err)
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}
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// Collect the records
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newRecords := make([]map[string]interface{}, len(result.Hits.Hits))
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for i, hit := range result.Hits.Hits {
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newRecords[i] = hit.Source
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}
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header := map[string]string{"index": index}
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var records []Data
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for _, v := range newRecords {
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data := Data{
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Header: header,
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Payload: v,
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}
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records = append(records, data)
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}
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return records, nil
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}
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