Development console

src/main/php/web/Application.class.php

@@ -43,6 +43,16 @@ public final function routing() {
    */
   protected abstract function routes();
 
+  /**
+   * Installs global filters
+   *
+   * @param  web.Filter[] $filters
+   * @return void
+   */
+  public function install($filters) {
+    $this->routing= Routing::cast(new Filters($filters, $this->routing()));
+  }
+
   /**
    * Service delegates to the routing, calling its `service()` method.
    *

src/main/php/xp/web/SAPI.class.php

@@ -35,7 +35,12 @@ public function scheme() { return 'http'; }
   public function uri() { return $_SERVER['REQUEST_URI']; }
 
   /** @return [:string] */
-  public function headers() { return getallheaders(); }
+  public function headers() {
+    yield 'Remote-Addr' => $_SERVER['REMOTE_ADDR'];
+    foreach (getallheaders() as $name => $value) {
+      yield $name => $value;
+    }
+  }
 
   /** @return string */
   public function readLine() {

src/main/php/xp/web/Source.class.php

@@ -8,14 +8,23 @@ class Source {
   /**
    * Creates a new application from a given name and environment
    *
-   * @param  string $name
+   * @param  string $name `application[+filter[,filter[,...]]]`
    * @param  web.Environment $environment
    */
   public function __construct($name, $environment) {
-    if ('-' === $name) {
+    sscanf($name, '%[^+]+%s', $application, $filters);
+
+    if ('-' === $application) {
       $this->application= new ServeDocumentRootStatically($environment);
     } else {
-      $this->application= XPClass::forName($name)->newInstance($environment);
+      $this->application= XPClass::forName($application)->newInstance($environment);
+    }
+
+    if ($filters) {
+      $this->application->install(array_map(
+        function($filter) { return XPClass::forName($filter)->newInstance(); },
+        explode(',', $filters)
+      ));
     }
   }
 

src/main/php/xp/web/dev/Buffer.class.php

@@ -0,0 +1,31 @@
+<?php namespace xp\web\dev;
+
+use web\io\Output;
+
+class Buffer extends Output {
+  public $status, $message, $headers;
+  public $bytes= '';
+
+  public function begin($status, $message, $headers) {
+    $this->status= $status;
+    $this->message= $message;
+    $this->headers= $headers;
+  }
+
+  public function write($bytes) {
+    $this->bytes.= $bytes;
+  }
+
+  /**
+   * Drain this buffered output to a given output instance, closing it
+   * once finished.
+   *
+   * @param  web.io.Output $out
+   * @return void
+   */
+  public function drain(Output $out) {
+    $out->begin($this->status, $this->message, $this->headers);
+    $out->write($this->bytes);
+    $out->close();
+  }
+}

src/main/php/xp/web/dev/Console.class.php

@@ -0,0 +1,74 @@
+<?php namespace xp\web\dev;
+
+use web\Filter;
+use web\Response;
+
+/**
+ * The development console captures content written via `var_dump()`,
+ * `echo` or other builtin output statements and - if any - displays it
+ * inside an easily readable format above the real output, using a 200
+ * HTTP response status.
+ *
+ * @see   php://ob_start
+ */
+class Console implements Filter {
+  private $template;
+
+  /** @param string $name */
+  public function __construct($name= 'xp/web/dev/console') {
+    $this->template= $name.'.html';
+  }
+
+  /**
+   * Creates HTML table rows
+   *
+   * @param  [:var] $headers
+   * @return string
+   */
+  private function rows($headers) {
+    $r= '';
+    foreach ($headers as $name => $value) {
+      $r.= '<tr>
+        <td class="name">'.htmlspecialchars($name).'</td>
+        <td class="value">'.htmlspecialchars(implode(', ', $value)).'</td>
+      </tr>';
+    }
+    return $r;
+  }
+
+  /**
+   * Filters the request
+   *
+   * @param  web.Request $req
+   * @param  web.Response $res
+   * @param  web.filters.Invocation $invocation
+   * @return var
+   */
+  public function filter($req, $res, $invocation) {
+    $buffer= new Buffer();
+
+    try {
+      ob_start();
+      $result= $invocation->proceed($req, new Response($buffer));
+    } finally {
+      $debug= ob_get_clean();
+      ob_end_clean();
+    }
+
+    if (empty($debug)) {
+      $buffer->drain($res->output());
+    } else {
+      $res->status(200, 'Debug');
+      $res->send(sprintf(
+        typeof($this)->getClassLoader()->getResource($this->template),
+        htmlspecialchars($debug),
+        $buffer->status,
+        htmlspecialchars($buffer->message),
+        $this->rows($buffer->headers),
+        htmlspecialchars($buffer->bytes)
+      ));
+    }
+
+    return $result;
+  }
+}

src/main/php/xp/web/dev/console.html

@@ -0,0 +1,68 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Debug</title>
+    <style type="text/css">
+      body         { font-family: "Segoe UI",Arial,Helvetica; background-color: rgb(27, 43, 52); color: rgb(205, 211, 222); }
+      #content     { margin: 2em; }
+      h1 img       { float: left; margin-right: 0.5em; }
+      h1 #code     { padding: 0.1em 0.5em; background-color: rgb(102, 153, 204); color: white; border-radius: 0.1em; }
+      #debug       { border: 1px dotted rgb(205, 211, 222); overflow: hidden; padding: 0.5em; font-size: 13px; }
+      button.clip  { float: right; }
+      h2 #status   { color: rgb(102, 153, 204); }
+      table        { margin-bottom: 1.5em; }
+      td           { padding: 0.3em; }
+      td.name      { background-color: rgb(41, 56, 65); }
+      td.value     { color: rgb(249, 145, 87); font-family: monospace; font-size: 13px; }
+      button       { background-color: rgb(41, 56, 65); cursor: pointer; border-radius: 0.1em; border: none; }
+      button:hover { opacity: .65; transition: all 150ms linear; }
+    </style>
+  </head>
+  <body bgcolor="#ffffff" text="#000000">
+    <div id="content">
+      <h1>
+        <img width="59" height="48" src="data:image/png;base64,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" alt="Debug"/>
+
+        <span id="code">DEBUG</span>
+      </h1>
+      <div id="debug">
+        <button class="clip" title="Copy to clipboard" onclick="clip(document.getElementById('output').innerText); flash(document.getElementById('debug'))">📋</button>
+        <pre id="output">%1$s</pre>
+      </div>
+
+      <!-- Original HTTP response -->
+      <h2>HTTP/1.1 <span id="status">%2$d %3$s</span></h2>
+      <table id="headers">
+        %4$s
+      </table>
+      <pre id="body">%5$s</pre>
+    </div>
+    <script type="text/javascript">
+      function clip(text) {
+        if (window.clipboardData) {
+          window.clipboardData.setData('Text', text);
+        } else {
+          var t = document.createElement('textarea');
+          t.value = text;
+          t.style.position = 'fixed';
+          t.style.top = 0;
+          t.style.left = 0;
+          t.style.width = '2em';
+          t.style.height = '2em';
+          t.style.background = 'transparent';
+          t.style.border = 'none';
+          document.body.appendChild(t);
+          t.select();
+          document.execCommand('copy');
+          document.body.removeChild(t);
+        }
+      }
+
+      function flash(div) {
+        div.style.transition = 'all 150ms linear';
+        div.style.backgroundColor = 'rgb(41, 56, 65)';
+        setTimeout(function() { div.style.backgroundColor = null; }, 100);
+      }
+    </script>
+  </body>
+</html>

src/main/php/xp/web/srv/Develop.class.php

@@ -10,7 +10,7 @@
 use peer\Socket;
 use io\IOException;
 
-class Develop {
+class Develop implements Server {
   private $host, $port;
 
   /**
@@ -61,7 +61,7 @@ public function serve($source, $profile, $webroot, $docroot, $config) {
     // Export environment
     putenv('DOCUMENT_ROOT='.$docroot);
     putenv('SERVER_PROFILE='.$profile);
-    putenv('WEB_SOURCE='.$source);
+    putenv('WEB_SOURCE='.$source.'+xp.web.dev.Console');
     putenv('WEB_CONFIG='.implode('PATH_SEPARATOR', $config));
     putenv('WEB_ROOT='.$webroot);
 

src/main/php/xp/web/srv/Server.class.php

@@ -0,0 +1,15 @@
+<?php namespace xp\web\srv;
+
+interface Server {
+
+  /**
+   * Serve requests
+   *
+   * @param  string $source
+   * @param  string $profile
+   * @param  io.Path $webroot
+   * @param  io.Path $docroot
+   * @param  string[] $config
+   */
+  public function serve($source, $profile, $webroot, $docroot, $config);
+}

src/main/php/xp/web/srv/Standalone.class.php

@@ -4,7 +4,7 @@
 use web\Environment;
 use xp\web\Source;
 
-abstract class Standalone {
+abstract class Standalone implements Server {
   private $server, $url;
 
   public function __construct($server, $url) {