Elasticsearch: Fix resource calls for paths that include : (#82327)

* Elasticsearch: Fix resource calls for paths that include :

* Add tests

* Add test case and comment

* Remove redundant comment

pkg/tsdb/elasticsearch/elasticsearch.go

@@ -205,21 +205,11 @@ func (s *Service) CallResource(ctx context.Context, req *backend.CallResourceReq
 		return err
 	}
 
-	esUrl, err := url.Parse(ds.URL)
+	esUrl, err := createElasticsearchURL(req, ds)
 	if err != nil {
-		logger.Error("Failed to parse data source URL", "error", err, "url", ds.URL)
-		return err
+		logger.Error("Failed to create request url", "error", err, "url", ds.URL, "path", req.Path)
 	}
 
-	resourcePath, err := url.Parse(req.Path)
-	if err != nil {
-		logger.Error("Failed to parse data source path", "error", err, "url", req.Path)
-		return err
-	}
-
-	// We take the path and the query-string only
-	esUrl.RawQuery = resourcePath.RawQuery
-	esUrl.Path = path.Join(esUrl.Path, resourcePath.Path)
 	request, err := http.NewRequestWithContext(ctx, req.Method, esUrl.String(), bytes.NewBuffer(req.Body))
 	if err != nil {
 		logger.Error("Failed to create request", "error", err, "url", esUrl.String())
@@ -269,3 +259,13 @@ func (s *Service) CallResource(ctx context.Context, req *backend.CallResourceReq
 		Body:    body,
 	})
 }
+
+func createElasticsearchURL(req *backend.CallResourceRequest, ds *es.DatasourceInfo) (*url.URL, error) {
+	esUrl, err := url.Parse(ds.URL)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse data source URL: %s, error: %w", ds.URL, err)
+	}
+
+	esUrl.Path = path.Join(esUrl.Path, req.Path)
+	return esUrl, nil
+}

pkg/tsdb/elasticsearch/elasticsearch_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/stretchr/testify/require"
 
 	"github.com/grafana/grafana/pkg/infra/httpclient"
+	es "github.com/grafana/grafana/pkg/tsdb/elasticsearch/client"
 )
 
 type datasourceInfo struct {
@@ -71,3 +72,32 @@ func TestNewInstanceSettings(t *testing.T) {
 		})
 	})
 }
+
+func TestCreateElasticsearchURL(t *testing.T) {
+	tt := []struct {
+		name     string
+		settings es.DatasourceInfo
+		req      backend.CallResourceRequest
+		expected string
+	}{
+		{name: "with /_msearch path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "_msearch"}, expected: "http://localhost:9200/_msearch"},
+		{name: "with _msearch path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "_msearch"}, expected: "http://localhost:9200/_msearch"},
+		{name: "with _msearch path and valid url with /", settings: es.DatasourceInfo{URL: "http://localhost:9200/"}, req: backend.CallResourceRequest{Path: "_msearch"}, expected: "http://localhost:9200/_msearch"},
+		{name: "with _mapping path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "/_mapping"}, expected: "http://localhost:9200/_mapping"},
+		{name: "with /_mapping path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "/_mapping"}, expected: "http://localhost:9200/_mapping"},
+		{name: "with /_mapping path and valid url with /", settings: es.DatasourceInfo{URL: "http://localhost:9200/"}, req: backend.CallResourceRequest{Path: "/_mapping"}, expected: "http://localhost:9200/_mapping"},
+		{name: "with abc/_mapping path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "abc/_mapping"}, expected: "http://localhost:9200/abc/_mapping"},
+		{name: "with /abc/_mapping path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200"}, req: backend.CallResourceRequest{Path: "abc/_mapping"}, expected: "http://localhost:9200/abc/_mapping"},
+		{name: "with /abc/_mapping path and valid url", settings: es.DatasourceInfo{URL: "http://localhost:9200/"}, req: backend.CallResourceRequest{Path: "abc/_mapping"}, expected: "http://localhost:9200/abc/_mapping"},
+		// This is to support mappings to cross cluster search that includes ":"
+		{name: "with path including :", settings: es.DatasourceInfo{URL: "http://localhost:9200/"}, req: backend.CallResourceRequest{Path: "ab:c/_mapping"}, expected: "http://localhost:9200/ab:c/_mapping"},
+	}
+
+	for _, test := range tt {
+		t.Run(test.name, func(t *testing.T) {
+			url, err := createElasticsearchURL(&test.req, &test.settings)
+			require.NoError(t, err)
+			require.Equal(t, test.expected, url.String())
+		})
+	}
+}