thekid · August 30, 2020 14:38
diff --git a/Uploads.class.php b/Uploads.class.php
 <?php

 use web\frontend\{Frontend, Templates, View};
 use web\session\{InFileSystem, Cookies};
 use web\{Application, Filter, Filters};

 class Uploads extends Application {

  /** @return [:var] */
  public function routes() {

    // Upload handler
    $upload= new class() {

      #[@get]
      public function show() {
        return View::named('form');
      }

      #[@post, @$request: request()]
      public function handle($request) {
        $uploaded= [];
        foreach ($request->multipart()->files() as $file) {
          $uploaded[]= ['name' => $file->name(), 'size' => strlen($file->bytes())];
        }
        return empty($uploaded)
          ? View::named('form')
          : View::named('uploaded')->with(['files' => $uploaded])
        ;
      }
    };

    // Simple template engine with inline templates
    $templates= new class() implements Templates {
      private static $templates= [
        'login'  => '
          <h1>Login for {{request.uri.path}}</h1>
          <form method="POST">
            <input type="hidden" name="return" value="{{request.uri.path}}"/>
            <label for="user">Username</label><input type="text" name="user"><br/>
            <label for="pass">Password</label><input type="password" name="pass"><br/>
            <input type="submit" value="Login">
          </form>
        ',
        'form' => '
          <h1>Welcome @{{request.values.user}}</h1
          <p>Please upload a file</p>
          <form method="POST" enctype="multipart/form-data">
            <input type="hidden" name="token" value="{{request.values.token}}"/>
            <label for="file">Select file</label><input type="file" name="upload"/><br/>
            <input type="submit" value="Upload"/>
          </form>              
        ',
        'uploaded' => '
          <h1>Thanks, @{{request.values.user}}!</h1
          <p>You have uploaded the file {{files.0.name}}, which is {{files.0.size}} bytes in size</p>
          <a href="/">Upload another file</a>              
        '
      ];

      public function write($name, $context, $out) {
        $out->write(preg_replace_callback(
          '/\{\{([^}]+)\}\}/',
          function($match) use($name, $context) {
            $lookup= $context + ['this' => $name];
            foreach (explode('.', $match[1]) as $segment) {
              $lookup= is_object($lookup) ? $lookup->{$segment}() : $lookup[$segment] ?? null;
            }
            return $lookup;
          },
          '<!DOCTYPE html><html><head><title>{{this}}</title></head><body>'.
          (self::$templates[$name] ?? '(Undefined template "'.$name.'")').
          '</body></html>'
        ));
      }
    };

    // Simple form-based authentication
    $auth= new class($templates) implements Filter {
      private $sessions, $templates;

      public function __construct($templates) {
        $this->sessions= (new InFileSystem('.'))->via((new Cookies())->insecure(true));
        $this->templates= $templates;
      }

      public function filter($request, $response, $invocation) {
        if ($session= $this->sessions->locate($request)) {
          $request->pass('user', $session->value('user'));
          $request->pass('token', $session->value('token'));
          return $invocation->proceed($request, $response);
        }

        // Authenticate, then redirect to get rid of POST method
        if ('POST' === $request->method() && 'test:test' === $request->param('user').':'.$request->param('pass')) {
          $session= $this->sessions->create();
          $session->register('user', 'test');
          $session->register('token', uniqid());

          $response->answer(303);
          $response->header('Location', $request->param('return', '/'));
          $session->transmit($response);
          return;
        }

        // Show login form
        $response->answer(200);
        $response->header('Content-Type', 'text/html; charset=utf-8');
        $out= $response->stream();
        try {
          $this->templates->write('login', ['request' => $request], $out);
        } finally {
          $out->close();
        }
      }
    };

    return [
      '/favicon.ico' => fn($request, $response) => $response->answer(404),
      '/'            => new Filters([$auth], new Frontend($upload, $templates)),
    ];
  }
 }
	<?php

	use web\frontend\{Frontend, Templates, View};
	use web\session\{InFileSystem, Cookies};
	use web\{Application, Filter, Filters};

	class Uploads extends Application {

	/** @return [:var] */
	public function routes() {

	// Upload handler
	$upload= new class() {

	#[@get]
	public function show() {
	return View::named('form');
	}

	#[@post, @$request: request()]
	public function handle($request) {
	$uploaded= [];
	foreach ($request->multipart()->files() as $file) {
	$uploaded[]= ['name' => $file->name(), 'size' => strlen($file->bytes())];
	}
	return empty($uploaded)
	? View::named('form')
	: View::named('uploaded')->with(['files' => $uploaded])
	;
	}
	};

	// Simple template engine with inline templates
	$templates= new class() implements Templates {
	private static $templates= [
	'login' => '
	<h1>Login for {{request.uri.path}}</h1>
	<form method="POST">
	<input type="hidden" name="return" value="{{request.uri.path}}"/>
	<label for="user">Username</label><input type="text" name="user"><br/>
	<label for="pass">Password</label><input type="password" name="pass"><br/>
	<input type="submit" value="Login">
	</form>
	',
	'form' => '
	<h1>Welcome @{{request.values.user}}</h1
	<p>Please upload a file</p>
	<form method="POST" enctype="multipart/form-data">
	<input type="hidden" name="token" value="{{request.values.token}}"/>
	<label for="file">Select file</label><input type="file" name="upload"/><br/>
	<input type="submit" value="Upload"/>
	</form>
	',
	'uploaded' => '
	<h1>Thanks, @{{request.values.user}}!</h1
	<p>You have uploaded the file {{files.0.name}}, which is {{files.0.size}} bytes in size</p>
	<a href="/">Upload another file</a>
	'
	];

	public function write($name, $context, $out) {
	$out->write(preg_replace_callback(
	'/\{\{([^}]+)\}\}/',
	function($match) use($name, $context) {
	$lookup= $context + ['this' => $name];
	foreach (explode('.', $match[1]) as $segment) {
	$lookup= is_object($lookup) ? $lookup->{$segment}() : $lookup[$segment] ?? null;
	}
	return $lookup;
	},
	'<!DOCTYPE html><html><head><title>{{this}}</title></head><body>'.
	(self::$templates[$name] ?? '(Undefined template "'.$name.'")').
	'</body></html>'
	));
	}
	};

	// Simple form-based authentication
	$auth= new class($templates) implements Filter {
	private $sessions, $templates;

	public function __construct($templates) {
	$this->sessions= (new InFileSystem('.'))->via((new Cookies())->insecure(true));
	$this->templates= $templates;
	}

	public function filter($request, $response, $invocation) {
	if ($session= $this->sessions->locate($request)) {
	$request->pass('user', $session->value('user'));
	$request->pass('token', $session->value('token'));
	return $invocation->proceed($request, $response);
	}

	// Authenticate, then redirect to get rid of POST method
	if ('POST' === $request->method() && 'test:test' === $request->param('user').':'.$request->param('pass')) {
	$session= $this->sessions->create();
	$session->register('user', 'test');
	$session->register('token', uniqid());

	$response->answer(303);
	$response->header('Location', $request->param('return', '/'));
	$session->transmit($response);
	return;
	}

	// Show login form
	$response->answer(200);
	$response->header('Content-Type', 'text/html; charset=utf-8');
	$out= $response->stream();
	try {
	$this->templates->write('login', ['request' => $request], $out);
	} finally {
	$out->close();
	}
	}
	};

	return [
	'/favicon.ico' => fn($request, $response) => $response->answer(404),
	'/' => new Filters([$auth], new Frontend($upload, $templates)),
	];
	}
	}
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