Datasources: Handle URL parsing error (#25742)

Adds handling of error returned from URL parsing.

Fixes #25714

pkg/tsdb/azuremonitor/applicationinsights-datasource.go

@@ -242,7 +242,10 @@ func (e *ApplicationInsightsDatasource) createRequest(ctx context.Context, dsInf
 	appInsightsAppID := dsInfo.JsonData.Get("appInsightsAppId").MustString()
 	proxyPass := fmt.Sprintf("%s/v1/apps/%s", pluginRouteName, appInsightsAppID)
 
-	u, _ := url.Parse(dsInfo.Url)
+	u, err := url.Parse(dsInfo.Url)
+	if err != nil {
+		return nil, err
+	}
 	u.Path = path.Join(u.Path, fmt.Sprintf("/v1/apps/%s", appInsightsAppID))
 
 	req, err := http.NewRequest(http.MethodGet, u.String(), nil)

pkg/tsdb/azuremonitor/azure-log-analytics-datasource.go

@@ -184,7 +184,10 @@ func (e *AzureLogAnalyticsDatasource) executeQuery(ctx context.Context, query *A
 }
 
 func (e *AzureLogAnalyticsDatasource) createRequest(ctx context.Context, dsInfo *models.DataSource) (*http.Request, error) {
-	u, _ := url.Parse(dsInfo.Url)
+	u, err := url.Parse(dsInfo.Url)
+	if err != nil {
+		return nil, err
+	}
 	u.Path = path.Join(u.Path, "render")
 
 	req, err := http.NewRequest(http.MethodGet, u.String(), nil)

pkg/tsdb/azuremonitor/azuremonitor-datasource.go

@@ -221,7 +221,10 @@ func (e *AzureMonitorDatasource) createRequest(ctx context.Context, dsInfo *mode
 	cloudName := dsInfo.JsonData.Get("cloudName").MustString("azuremonitor")
 	proxyPass := fmt.Sprintf("%s/subscriptions", cloudName)
 
-	u, _ := url.Parse(dsInfo.Url)
+	u, err := url.Parse(dsInfo.Url)
+	if err != nil {
+		return nil, err
+	}
 	u.Path = path.Join(u.Path, "render")
 
 	req, err := http.NewRequest(http.MethodGet, u.String(), nil)