Add a me endpoint for chronograf

Returns the currently signed in user from session or token

http/api_handler.go

@@ -200,6 +200,11 @@ func (h *APIHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if strings.HasPrefix(r.URL.Path, "/api/v2/me") {
+		h.UserHandler.ServeHTTP(w, r)
+		return
+	}
+
 	if strings.HasPrefix(r.URL.Path, "/api/v2/orgs") {
 		h.OrgHandler.ServeHTTP(w, r)
 		return

http/user_service.go

@@ -9,6 +9,7 @@ import (
 	"path"
 
 	"github.com/influxdata/platform"
+	platcontext "github.com/influxdata/platform/context"
 	kerrors "github.com/influxdata/platform/kit/errors"
 	"github.com/julienschmidt/httprouter"
 )
@@ -26,6 +27,7 @@ func NewUserHandler() *UserHandler {
 	}
 
 	h.HandlerFunc("POST", "/api/v2/users", h.handlePostUser)
+	h.HandlerFunc("GET", "/api/v2/me", h.handleGetMe)
 	h.HandlerFunc("GET", "/api/v2/users", h.handleGetUsers)
 	h.HandlerFunc("GET", "/api/v2/users/:id", h.handleGetUser)
 	h.HandlerFunc("PATCH", "/api/v2/users/:id", h.handlePatchUser)
@@ -69,6 +71,36 @@ func decodePostUserRequest(ctx context.Context, r *http.Request) (*postUserReque
 	}, nil
 }
 
+// handleGetUser is the HTTP handler for the GET /api/v2/me.
+func (h *UserHandler) handleGetMe(w http.ResponseWriter, r *http.Request) {
+	ctx := r.Context()
+
+	a, err := platcontext.GetAuthorizer(ctx)
+	if err != nil {
+		EncodeError(ctx, err, w)
+		return
+	}
+
+	id := []byte{}
+	switch s := a.(type) {
+	case *platform.Session:
+		id = s.UserID
+	case *platform.Authorization:
+		id = s.UserID
+	}
+
+	b, err := h.UserService.FindUserByID(ctx, id)
+	if err != nil {
+		EncodeError(ctx, err, w)
+		return
+	}
+
+	if err := encodeResponse(ctx, w, http.StatusOK, b); err != nil {
+		EncodeError(ctx, err, w)
+		return
+	}
+}
+
 // handleGetUser is the HTTP handler for the GET /api/v2/users/:id route.
 func (h *UserHandler) handleGetUser(w http.ResponseWriter, r *http.Request) {
 	ctx := r.Context()