从PHP返回到jQuery的xml数据无法捕获

Question

根据此建议： PHP中的Rss Reader

我已经更改了bridge.php

<?php
header ( 'Access-Control-Allow-Origin: *' );
$tmpFile = 'out.txt';
$val = "http://rss.news.yahoo.com/rss/topstories";
$curlHandle = curl_init ( $val );
$filePointer = fopen ( $tmpFile, "w" );
curl_setopt ( $curlHandle, CURLOPT_FILE, $filePointer );
curl_setopt($curlHandle, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US)    AppleWebKit/533.2 (KHTML, like Gecko) Chrome/5.0.342.3 Safari/533.2');
curl_setopt($curlHandle, CURLOPT_ENCODING , "gzip");
curl_setopt($curlHandle, CURLOPT_TIMEOUT,5);
curl_setopt($curlHandle, CURLOPT_FOLLOWLOCATION, TRUE);
curl_exec ( $curlHandle );
curl_close ( $curlHandle );
fclose ( $filePointer );
$linesArr = file ( $tmpFile );
foreach ( $linesArr as $eachLine ) {
echo ($eachLine);
}
?>

成功创建“ out.txt”：

<?xml version="1.0" encoding="utf-8"?>
<rss xmlns:media="http://search.yahoo.com/mrss/" version="2.0">
<channel>
<title>Yahoo News - Top Stories</title>
<link>http://news.yahoo.com/topstories/</link>
<description/>
<language>en-US</language>
<copyright>Copyright (c) 2014 Yahoo! Inc. All rights reserved</copyright>
<pubDate>Wed, 07 May 2014 22:54:13 -0400</pubDate>
<ttl>5</ttl>
<image>
<title>Yahoo News - Top Stories</title>
<link>http://news.yahoo.com/topstories/</link>
...
</rss>
<!-- fe927.global.media.sg3.yahoo.com compressed/chunked Thu May  8 03:00:48 UTC 2014 -->

由于后期字数限制，我省略了rss feed的内容主体。 无论如何，“ bridge.php”似乎运行良好。

但是在我的JQuery脚本中，我无法成功捕获返回的xml内容。

      $.ajax({type: "GET", dataType: "xml", url: 'bridge.php', success: handler, error: error_handler});
  return false; 
}

function error_handler(xhr, status, error) {
alert("error");
}

.ajax（）调用中的成功或错误处理程序都无法执行。 为了调试，我将.ajax(dataType:"text")放入了一些调试代码到data.php中，它的工作原理是将正确的信息从PHP捕获到JQuery。

感谢您的任何建议。