Add page footer with request time display

assets/layout.html

@@ -31,6 +31,9 @@
         <main>
             {{block "content" .}}{{end}}
         </main>
+        <footer>
+            <span class="muted">Request time: {{.RenderMS}} ms</span>
+        </footer>
         {{block "extras" .}}{{end}}
     </body>
 </html>

assets/style.css

@@ -37,6 +37,8 @@ body {
     font:
         1rem "Iosevka Etoile",
         monospace;
+    display: flex;
+    flex-direction: column;
 }
 
 * {
@@ -148,6 +150,8 @@ main {
     max-width: 860px;
     margin: 0 auto;
     padding: 1.5rem 1rem;
+    width: 100%;
+    flex: 1;
 }
 
 /* === Markdown content === */
@@ -439,6 +443,16 @@ textarea {
     font-size: 0.85rem;
 }
 
+/* === Page footer === */
+footer {
+    padding: 0.75rem 1rem;
+    border-top: 1px dashed var(--secondary);
+    display: flex;
+    align-items: center;
+    gap: 0.5rem;
+    flex-wrap: wrap;
+}
+
 /* === Task lists === */
 .content li:has(> input.task-checkbox:checked) {
     color: var(--text-muted);
@@ -822,7 +836,8 @@ hr {
 }
 
 @media (max-width: 600px) {
-    header {
+    header,
+    footer {
         padding: 0.5rem 0.75rem;
     }
     main {

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"embed"
 	"flag"
 	"html/template"
@@ -12,6 +13,7 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+	"time"
 )
 
 //go:embed assets
@@ -94,7 +96,23 @@ type handler struct {
 	authKey          []byte
 }
 
+// reqStartKey marks the request start time stored in the request context
+// so HTML templates can render total server-side processing time.
+type reqStartKeyT struct{}
+
+var reqStartKey = reqStartKeyT{}
+
+// elapsedMS returns the milliseconds since the request entered ServeHTTP.
+func elapsedMS(r *http.Request) int64 {
+	if start, ok := r.Context().Value(reqStartKey).(time.Time); ok {
+		return time.Since(start).Milliseconds()
+	}
+	return 0
+}
+
 func (h *handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	r = r.WithContext(context.WithValue(r.Context(), reqStartKey, time.Now()))
+
 	if !h.checkAuth(w, r) {
 		return
 	}
@@ -234,6 +252,7 @@ func (h *handler) serveDir(w http.ResponseWriter, r *http.Request, urlPath, fsPa
 	if editMode {
 		t = editTmpl
 	}
+	data.RenderMS = elapsedMS(r)
 	if err := t.ExecuteTemplate(w, "layout", data); err != nil {
 		log.Printf("template error: %v", err)
 	}

render.go

@@ -47,6 +47,7 @@ type pageData struct {
 	Entries        []entry
 	SpecialContent template.HTML
 	SidebarWidget  template.HTML
+	RenderMS       int64
 }
 
 // pageSettings holds the parsed contents of a .page-settings file.

search.go

@@ -23,6 +23,7 @@ type searchPageData struct {
 	EditMode bool
 	Query    string
 	Results  []searchResult
+	RenderMS int64
 }
 
 // handleSearch walks the wiki root and renders a search results page for the
@@ -43,6 +44,7 @@ func (h *handler) handleSearch(w http.ResponseWriter, r *http.Request) {
 		Results: results,
 	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	data.RenderMS = elapsedMS(r)
 	if err := searchTmpl.ExecuteTemplate(w, "layout", data); err != nil {
 		log.Printf("search template error: %v", err)
 	}