[9.2.x] Backport Contexthandler: Add uname as response header #59930 (#59950)

* Contexthandler: Add uname as response header (#59930)

Signed-off-by: bergquist <carl.bergquist@gmail.com>
(cherry picked from commit 1b676d0d49)

* fixes tests broken due to moved featuremgt package

Signed-off-by: bergquist <carl.bergquist@gmail.com>

Signed-off-by: bergquist <carl.bergquist@gmail.com>

pkg/services/contexthandler/contexthandler.go

@@ -22,6 +22,7 @@ import (
 	"github.com/grafana/grafana/pkg/services/apikey"
 	"github.com/grafana/grafana/pkg/services/contexthandler/authproxy"
 	"github.com/grafana/grafana/pkg/services/contexthandler/ctxkey"
+	"github.com/grafana/grafana/pkg/services/featuremgmt"
 	"github.com/grafana/grafana/pkg/services/login"
 	"github.com/grafana/grafana/pkg/services/org"
 	"github.com/grafana/grafana/pkg/services/rendering"
@@ -172,6 +173,11 @@ func (h *ContextHandler) Middleware(next http.Handler) http.Handler {
 			}
 		}
 
+		// this can be used by proxies to identify certain users
+		if h.Cfg.IsFeatureToggleEnabled(featuremgmt.FlagReturnUnameHeader) {
+			w.Header().Add("grafana-uname", reqContext.Login)
+		}
+
 		next.ServeHTTP(w, r)
 	})
 }

pkg/services/featuremgmt/registry.go

@@ -9,6 +9,11 @@ package featuremgmt
 var (
 	// Register each toggle here
 	standardFeatureFlags = []FeatureFlag{
+		{
+			Name:        "returnUnameHeader",
+			Description: "Return user login as header for authenticated requests",
+			State:       FeatureStateAlpha,
+		},
 		{
 			Name:        "trimDefaults",
 			Description: "Use cue schema to remove values that will be applied automatically",

pkg/services/featuremgmt/toggles_gen.go

@@ -7,6 +7,10 @@
 package featuremgmt
 
 const (
+	// FlagReturnUnameHeader
+	// Return user login as header for authenticated requests
+	FlagReturnUnameHeader = "returnUnameHeader"
+
 	// FlagTrimDefaults
 	// Use cue schema to remove values that will be applied automatically
 	FlagTrimDefaults = "trimDefaults"

pkg/services/quota/quotaimpl/storage/storage.json

@@ -0,0 +1,5 @@
+{
+  "allowUnsanitizedSvgUpload": false,
+  "addDevEnv": true,
+  "roots": null
+}