Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

middleware/earlydata/earlydata.go

@@ -0,0 +1,47 @@
+package earlydata
+
+import (
+	"github.com/gofiber/fiber/v2"
+)
+
+const (
+	localsKeyAllowed = "earlydata_allowed"
+)
+
+func IsEarly(c *fiber.Ctx) bool {
+	return c.Locals(localsKeyAllowed) != nil
+}
+
+// New creates a new middleware handler
+// https://datatracker.ietf.org/doc/html/rfc8470#section-5.1
+func New(config ...Config) fiber.Handler {
+	// Set default config
+	cfg := configDefault(config...)
+
+	// Return new handler
+	return func(c *fiber.Ctx) error {
+		// Don't execute middleware if Next returns true
+		if cfg.Next != nil && cfg.Next(c) {
+			return c.Next()
+		}
+
+		// Abort if we can't trust the early-data header
+		if !c.IsProxyTrusted() {
+			return cfg.Error
+		}
+
+		// Continue stack if request is not an early-data request
+		if !cfg.IsEarlyData(c) {
+			return c.Next()
+		}
+
+		// Continue stack if we allow early-data for this request
+		if cfg.AllowEarlyData(c) {
+			_ = c.Locals(localsKeyAllowed, true)
+			return c.Next()
+		}
+
+		// Else return our error
+		return cfg.Error
+	}
+}