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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
package clients
import (
"context"
"encoding/json"
"fmt"
"io"
"net/http"
"strings"
"sync"
"github.com/pkg/errors"
)
func (v *vectorizer) MetaInfo() (map[string]interface{}, error) {
type nameMetaErr struct {
name string
meta map[string]interface{}
err error
}
endpoints := map[string]string{}
if v.originPassage != v.originQuery {
endpoints["passage"] = v.urlPassage("/meta")
endpoints["query"] = v.urlQuery("/meta")
} else {
endpoints[""] = v.urlPassage("/meta")
}
var wg sync.WaitGroup
ch := make(chan nameMetaErr, len(endpoints))
for serviceName, endpoint := range endpoints {
wg.Add(1)
go func(serviceName string, endpoint string) {
defer wg.Done()
meta, err := v.metaInfo(endpoint)
ch <- nameMetaErr{serviceName, meta, err}
}(serviceName, endpoint)
}
wg.Wait()
close(ch)
metas := map[string]interface{}{}
var errs []string
for nme := range ch {
if nme.err != nil {
prefix := ""
if nme.name != "" {
prefix = "[" + nme.name + "] "
}
errs = append(errs, fmt.Sprintf("%s%v", prefix, nme.err.Error()))
}
if nme.meta != nil {
metas[nme.name] = nme.meta
}
}
if len(errs) > 0 {
return nil, errors.Errorf(strings.Join(errs, ", "))
}
if len(metas) == 1 {
for _, meta := range metas {
return meta.(map[string]interface{}), nil
}
}
return metas, nil
}
func (v *vectorizer) metaInfo(endpoint string) (map[string]interface{}, error) {
req, err := http.NewRequestWithContext(context.Background(), "GET", endpoint, nil)
if err != nil {
return nil, errors.Wrap(err, "create GET meta request")
}
res, err := v.httpClient.Do(req)
if err != nil {
return nil, errors.Wrap(err, "send GET meta request")
}
defer res.Body.Close()
if !(res.StatusCode >= http.StatusOK && res.StatusCode < http.StatusMultipleChoices) {
return nil, errors.Errorf("unexpected status code '%d' of meta request", res.StatusCode)
}
bodyBytes, err := io.ReadAll(res.Body)
if err != nil {
return nil, errors.Wrap(err, "read meta response body")
}
var resBody map[string]interface{}
if err := json.Unmarshal(bodyBytes, &resBody); err != nil {
return nil, errors.Wrap(err, "unmarshal meta response body")
}
return resBody, nil
}
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