添加文件
cnurl.php
代码如下

<?php
if (isset($_SERVER['HTTP_X_ORIGINAL_URL'])) {
	// IIS Mod-Rewrite
	$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_ORIGINAL_URL'];
} else if (isset($_SERVER['HTTP_X_REWRITE_URL'])) {
	// IIS Isapi_Rewrite
	$_SERVER['REQUEST_URI'] = $_SERVER['HTTP_X_REWRITE_URL'];
} else {
	// Use ORIG_PATH_INFO if there is no PATH_INFO
	(!isset($_SERVER['PATH_INFO']) && isset($_SERVER['ORIG_PATH_INFO'])) && ($_SERVER['PATH_INFO'] = $_SERVER['ORIG_PATH_INFO']);
	// Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)
	if (isset($_SERVER['PATH_INFO'])) {
		($_SERVER['PATH_INFO'] == $_SERVER['SCRIPT_NAME']) ? ($_SERVER['REQUEST_URI'] = $_SERVER['PATH_INFO']) : ($_SERVER['REQUEST_URI'] = $_SERVER['SCRIPT_NAME'] . $_SERVER['PATH_INFO']);
	}
	// Append the query string if it exists and isn't null
	(isset($_SERVER['QUERY_STRING']) && !empty($_SERVER['QUERY_STRING'])) && ($_SERVER['REQUEST_URI'] .= '?' . $_SERVER['QUERY_STRING']);
}
require("index.php");
?>

              <rule name="cnUrl" stopProcessing="true">
                <match url="^topic/(.*)$" />
                <action type="Rewrite" url="cnurl.php" />
              </rule>

   附件包含2个文件