third_party/WebKit/LayoutTests/http/tests/resources/network-simulator.php

   1 <?php
   2 require_once 'portabilityLayer.php';
   3
   4 // This script acts as a stateful proxy for retrieving files. When the state is set to
   5 // offline, it simulates a network error with a nonsense response.
   6
   7 if (!sys_get_temp_dir()) {
   8     echo "FAIL: No temp dir was returned.\n";
   9     exit();
  10 }
  11
  12 function setState($newState, $file)
  13 {
  14     file_put_contents($file, $newState);
  15 }
  16
  17 function getState($file)
  18 {
  19     if (!file_exists($file)) {
  20         return "Uninitialized";
  21     }
  22     return file_get_contents($file);
  23 }
  24
  25 function contentType($path)
  26 {
  27     if (preg_match("/\.html$/", $path))
  28         return "text/html";
  29     if (preg_match("/\.manifest$/", $path))
  30         return "text/cache-manifest";
  31     if (preg_match("/\.js$/", $path))
  32         return "text/javascript";
  33     if (preg_match("/\.xml$/", $path))
  34         return "application/xml";
  35     if (preg_match("/\.xhtml$/", $path))
  36         return "application/xhtml+xml";
  37     if (preg_match("/\.svg$/", $path))
  38         return "application/svg+xml";
  39     if (preg_match("/\.xsl$/", $path))
  40         return "application/xslt+xml";
  41     if (preg_match("/\.gif$/", $path))
  42         return "image/gif";
  43     if (preg_match("/\.jpg$/", $path))
  44         return "image/jpeg";
  45     if (preg_match("/\.png$/", $path))
  46         return "image/png";
  47     return "text/plain";
  48 }
  49
  50 function generateNoCacheHTTPHeader()
  51 {
  52     header("Expires: Thu, 01 Dec 2003 16:00:00 GMT");
  53     header("Cache-Control: no-cache, no-store, must-revalidate");
  54     header("Pragma: no-cache");
  55 }
  56
  57 function generateResponse($path)
  58 {
  59     global $stateFile;
  60     $state = getState($stateFile);
  61     if ($state == "Offline") {
  62         # Simulate a network error by replying with a nonsense response.
  63         header('HTTP/1.1 307 Temporary Redirect');
  64         header('Location: ' . $_SERVER['REQUEST_URI']); # Redirect to self.
  65         header('Content-Length: 1');
  66         header('Content-Length: 5', false); # Multiple content-length headers, some network stacks can detect this condition faster.
  67         echo "Intentionally incorrect response.";
  68     } else {
  69         // A little securuty checking can't hurt.
  70         if (strstr($path, ".."))
  71             exit;
  72
  73         if ($path[0] == '/')
  74             $path = '..' . $path;
  75
  76         if (!$_GET['allow-caching'])
  77             generateNoCacheHTTPHeader();
  78
  79         if (file_exists($path)) {
  80             header("Last-Modified: " . gmdate("D, d M Y H:i:s T", filemtime($path)));
  81             header("Content-Type: " . contentType($path));
  82
  83             print file_get_contents($path);
  84         } else {
  85             header('HTTP/1.1 404 Not Found');
  86         }
  87     }
  88 }
  89
  90 function handleIncreaseResourceCountCommand($path)
  91 {
  92     $resourceCountFile = sys_get_temp_dir() . "/resource-count";
  93     $resourceCount = getState($resourceCountFile);
  94     $pieces = explode(" ", $resourceCount);
  95     $count = 0;
  96     if (count($pieces) == 2 && $pieces[0] == $path) {
  97         $count = 1 + $pieces[1];
  98     } else {
  99         $count = 1;
 100     }
 101     file_put_contents($resourceCountFile, $path . " " . $count);
 102     generateResponse($path);
 103 }
 104
 105 function handleResetResourceCountCommand()
 106 {
 107     $resourceCountFile = sys_get_temp_dir() . "/resource-count";
 108     file_put_contents($resourceCountFile, 0);
 109     generateNoCacheHTTPHeader();
 110     header('HTTP/1.1 200 OK');
 111 }
 112
 113 function handleGetResourceCountCommand($path)
 114 {
 115     $resourceCountFile = sys_get_temp_dir() . "/resource-count";
 116     $resourceCount = getState($resourceCountFile);
 117     $pieces = explode(" ", $resourceCount);
 118     generateNoCacheHTTPHeader();
 119     header('HTTP/1.1 200 OK');
 120     if (count($pieces) == 2 && $pieces[0] == $path) {
 121         echo $pieces[1];
 122     } else {
 123         echo 0;
 124     }
 125 }
 126
 127 function handleStartResourceRequestsLog()
 128 {
 129     $resourceLogFile = sys_get_temp_dir() . "/resource-log";
 130     file_put_contents($resourceLogFile,  "");
 131 }
 132
 133 function handleClearResourceRequestsLog()
 134 {
 135     $resourceLogFile = sys_get_temp_dir() . "/resource-log";
 136     file_put_contents($resourceLogFile, "");
 137 }
 138
 139 function handleGetResourceRequestsLog()
 140 {
 141     $resourceLogFile = sys_get_temp_dir() . "/resource-log";
 142
 143     generateNoCacheHTTPHeader();
 144     header("Content-Type: text/plain");
 145
 146     print file_get_contents($resourceLogFile);
 147 }
 148
 149 function handleLogResourceRequest($path)
 150 {
 151     $resourceLogFile = sys_get_temp_dir() . "/resource-log";
 152
 153     $newData = "\n".$path;
 154     file_put_contents($resourceLogFile, $newData, FILE_APPEND | LOCK_EX);
 155 }
 156
 157 $stateFile = sys_get_temp_dir() . "/network-simulator-state";
 158 $command = $_GET['command'];
 159 if ($command) {
 160     if ($command == "connect")
 161         setState("Online", $stateFile);
 162     else if ($command == "disconnect")
 163         setState("Offline", $stateFile);
 164     else if ($command == "increase-resource-count")
 165         handleIncreaseResourceCountCommand($_GET['path']);
 166     else if ($command == "reset-resource-count")
 167         handleResetResourceCountCommand();
 168     else if ($command == "get-resource-count")
 169         handleGetResourceCountCommand($_GET['path']);
 170     else if ($command == "start-resource-request-log")
 171         handleStartResourceRequestsLog();
 172     else if ($command == "clear-resource-request-log")
 173         handleClearResourceRequestsLog();
 174     else if ($command == "get-resource-request-log")
 175         handleGetResourceRequestsLog();
 176     else if ($command == "log-resource-request")
 177         handleLogResourceRequest($_GET['path']);
 178     else
 179         echo "Unknown command: " . $command . "\n";
 180     exit();
 181 }
 182
 183 $requestedPath = $_GET['path'];
 184 generateResponse($requestedPath);
 185 ?>