WasmHeadersMiddleware class

Middleware that adds WebAssembly multi-threading headers to responses.

Adds the following headers required for SharedArrayBuffer and WASM multi-threading:

• Cross-Origin-Opener-Policy: same-origin
• Cross-Origin-Embedder-Policy: require-corp

These headers enable Flutter web apps to use WebAssembly multi-threading features by establishing cross-origin isolation.

Usage with FlutterRoute

FlutterRoute automatically applies this middleware, so you typically don't need to use it directly:

pod.webServer.addRoute(FlutterRoute(Directory('web/app')));

Standalone Usage

You can also apply it manually to any route:

pod.webServer.addMiddleware(WasmHeadersMiddleware(), '/app');

How It Works

The middleware intercepts all Response objects and adds COOP/COEP headers. Other Result types (Hijack, WebSocketUpgrade) pass through unchanged. Existing headers are preserved.

Inheritance

• Object
• MiddlewareObject
• WasmHeadersMiddleware

Constructors

WasmHeadersMiddleware()

Creates a new WasmHeadersMiddleware

const

Properties

asMiddleware → Middleware

Returns this MiddlewareObject as a Middleware function.

no setter, inherited

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

call(Handler next) → Handler

The implementation of this MiddlewareObject

override

injectIn(Router<Handler> router) → void

Use this middleware on router on path /. Override to use on a different path.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited