Add new Metrics API (#26919)

server/channels/api4/metrics.go

@@ -0,0 +1,38 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package api4
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"github.com/mattermost/mattermost/server/public/model"
+)
+
+func (api *API) InitClientPerformanceMetrics() {
+	api.BaseRoutes.APIRoot.Handle("/perf", api.APISessionRequired(submitPerformanceReport)).Methods("POST")
+}
+
+func submitPerformanceReport(c *Context, w http.ResponseWriter, r *http.Request) {
+	// we return early if server does not have any metrics infra available
+	if c.App.Metrics() == nil || !*c.App.Config().MetricsSettings.EnableClientMetrics {
+		return
+	}
+
+	var report model.PerformanceReport
+	if jsonErr := json.NewDecoder(r.Body).Decode(&report); jsonErr != nil {
+		c.SetInvalidParamWithErr("submitPerformanceReport", jsonErr)
+		return
+	}
+
+	if err := report.IsValid(); err != nil {
+		c.SetInvalidParamWithErr("submitPerformanceReport", err)
+		return
+	}
+
+	if appErr := c.App.RegisterPerformanceReport(c.AppContext, &report); appErr != nil {
+		c.Err = appErr
+		return
+	}
+}