Initial project import

tools/v/examples/veb/middleware/templates/base.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>@title</title>
+</head>
+<body>
+<nav>
+    <a href="/">Home</a>
+    <a href="/admin/secrets">"/admin/secrets"</a>
+    <a href="/admin/dynamic">"/admin/dynamic"</a>
+    <a href="/early">Early exit</a>
+</nav>
+<main>
+    @content
+</main>
+<footer></footer>
+</body>
+</html>

tools/v/examples/veb/middleware/templates/early.html

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+<p>Early exit</p>

tools/v/examples/veb/middleware/templates/index.html

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+<h1>Hello </h1>

tools/v/examples/veb/middleware/templates/secret.html

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+<p>Super secret stuff</p>

tools/v/examples/veb/middleware/using_middleware.v

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+module main
+
+import veb
+
+// for another example see vlib/veb/tests/middleware_test.v
+const http_port = 8080
+
+pub struct Context {
+	veb.Context
+mut:
+	is_authenticated bool
+}
+
+struct App {
+	veb.Middleware[Context]
+}
+
+fn main() {
+	mut app := &App{}
+
+	// chaining is allowed, middleware will be evaluated in order
+	app.Middleware.use(handler: other_func1)
+	app.Middleware.use(handler: other_func2)
+
+	// route-specific middleware
+	app.Middleware.route_use('/admin/:path...', handler: check_auth)
+	app.Middleware.route_use('/early', handler: middleware_early)
+
+	veb.run[App, Context](mut app, http_port)
+}
+
+@['/']
+pub fn (app &App) index(mut ctx Context) veb.Result {
+	println('Index page')
+	title := 'Home Page'
+
+	content := $tmpl('templates/index.html')
+	base := $tmpl('templates/base.html')
+	return ctx.html(base)
+}
+
+@['/admin/secrets']
+pub fn (app &App) secrets(mut ctx Context) veb.Result {
+	println('Secrets page')
+	title := 'Secret Admin Page'
+
+	content := $tmpl('templates/secret.html')
+	base := $tmpl('templates/base.html')
+	return ctx.html(base)
+}
+
+@['/admin/:sub']
+pub fn (app &App) dynamic(mut ctx Context, sub string) veb.Result {
+	println('Dynamic page')
+	title := 'Secret dynamic'
+
+	content := sub
+	base := $tmpl('templates/base.html')
+	return ctx.html(base)
+}
+
+@['/early']
+pub fn (app &App) early(mut ctx Context) veb.Result {
+	println('Early page')
+	title := 'Early Exit'
+
+	content := $tmpl('templates/early.html')
+	base := $tmpl('templates/base.html')
+	return ctx.html(base)
+}
+
+fn other_func1(mut _ Context) bool {
+	println('1')
+	return true
+}
+
+fn other_func2(mut _ Context) bool {
+	println('2')
+	return true
+}
+
+fn check_auth(mut ctx Context) bool {
+	println('3')
+	if ctx.is_authenticated == false {
+		ctx.redirect('/')
+	}
+	return ctx.is_authenticated
+}
+
+fn middleware_early(mut ctx Context) bool {
+	println('4')
+	ctx.text(':(')
+	// returns false, so the middleware propagation is stopped and the user will see the text ":("
+	return false
+}