在浏览器里打开feed地址，不能像正常的feed订阅那样出来订阅的页面，在firefox下是直接以纯文本形式显示，IE7下显示“已取消到该 网页的导航”，而直接通过google reader等倒是能正常订阅。在Feed Validator上检查feed文件的正确性，问题如下：
This feed does not validate.
line 1, column 1: Blank line before XML declaration [help]
line 42, column 1: XML parsing error: :42:1: not well-formed (invalid token) [help]
虽然对于我这blog来说feed订阅这东西短期内基本上是拿来摆设的，不过有这问题心里总是不爽，于是乎网上搜寻解决办法，皇天不负有心人，最后 顺利解决问题了，下面就介绍一下我的解决方法（方法非原创，参考了SAM LESHER）。
先说说引起这个问题的原因：godaddy的免费空间（CreatingDrew）， 因为godaddy会 自动加上一段广告代码，所以在feed的XML文件输出时也在文件的最后两行给加上了广告代码，并在最前面加了一个空行，这就是上面检查出的问题，所以只 要去了这个空行和广告代码就OK了，步骤大致如下：
1. 根据wordpress输出feed的默认地址下载feed文件到本地，这个文件是包含广告代码的
2. 写脚本，使用sed对文件进行过滤，把开头的空行和广告给删除掉
3. 通过修改后的feed文件输出feed订阅信息
4. 在godaddy管 理页面上建一条cron任务，每隔一定时间执行一遍脚本，使更新后的feed地址也是正常的
可以把feed文件下载和过滤都写到一个脚本里，修改feed地址则可以使用插件来完成。
下面是实现脚本：
#!/bin/sh
BLOGADDRESS="http://blog.happysa.org" #blog地址，用于下载feed文件
FEEDPATH=/var/www/home/happysa/domains/happysa.org/public_html/feed #下载后的feed文件存放地址，路径根据具体情况修改
FEEDFILE=$FEEDPATH/feed.xml
RSSFILE=$FEEDPATH/rss.xml
RDFFILE=$FEEDPATH/rdf.xml
ATOMFILE=$FEEDPATH/atom.xml
COMMENTSFILE=$FEEDPATH/comments.xml
#GDSTRING1="</object></layer></span></div></table></body></html><!-- adsok -->"
#GDSTRING2="<script language='javascript' src='https://a12.alphagodaddy.com/hosting_ads/gd01.js'></script>"
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if [ -f $FEEDFILE ]; #删除老的feed文件
then
rm -f $FEEDFILE
fi
wget -q $BLOGADDRESS/feed -O $FEEDFILE #下载feed文件
sed -i '/!-- adsok --/d;/alphagodaddy/d;1d' $FEEDFILE #过滤广告代码和最前面的空行，过滤条件可根据具体情况作改动
sed -i 's/blog.happysa.org\/feed\"\( rel=\"self\" type=\"application\/rss+xml\" \/>\)/feed.happysa.org\/\"\1/' $FEEDFILE #修改订阅地址
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if [ -f $RSSFILE ];
then
rm -f $RSSFILE
fi
wget -q $BLOGADDRESS/feed/rss -O $RSSFILE
sed -i '/!-- adsok --/d;/alphagodaddy/d;1d' $RSSFILE
�
if [ -f $RDFFILE ];
then
rm -f $kRDFFILE
fi
wget -q $BLOGADDRESS/feed/rdf -O $RDFFILE
sed -i '/!-- adsok --/d;/alphagodaddy/d;1d' $RDFFILE
�
if [ -f $ATOMFILE ];
then
rm -f $ATOMFILE
fi
wget -q $BLOGADDRESS/feed/atom -O $ATOMFILE
sed -i '/!-- adsok --/d;/alphagodaddy/d;1d' $ATOMFILE
sed -i 's/blog.happysa.org\/feed\/atom\" \/>/feed.happysa.org\/atom.xml\" \/>/' $ATOMFILE
�
if [ -f $COMMENTSFILE ];
then
rm -f $COMMENTSFILE
fi
wget -q $BLOGADDRESS/comments/feed -O $COMMENTSFILE
sed -i '/!-- adsok --/d;/alphagodaddy/d;1d' $COMMENTSFILE
sed -i 's/blog.happysa.org\/feed\/comments\"\( rel=\"self\" type=\"application\/rss+xml\" \/>\)/feed.happysa.org\/comments.xml\"\1/' $COMMENTSFILE
以上代码新建一个脚本feed.sh，在空间下放哪都可以，之后在空间根目录下建立feed文件夹，用于存放feed文件。
好像免费空间没有ssh 帐号的，有些东西设置就会麻烦一点，首先要打开ftp客户端登陆后在脚本文件上右击修改属性，使之有可执行权限。接着就是利用cron建立一个自动执行计 划，让脚本每隔多少时间执行一次，在Hosting Control Center上Content下的Cron manager，如图：
Create Cron Job，主要是Command，时间勾上Run twice an hour，这样可以更新频繁一点，之后保存。
接下来就是设置feed地址了，只要feed正常了，怎么用就很简单了，网上的方法也很多，比如可以使用wp-feedlocations， 安装后在里面设置feed地址
上面有个地方用到空间的绝对路径，查看绝对路径可以利用php的system函数，同时如果没到cron的时间而想手动执行脚本也可以利用这个，并 且可以用这个来输出信息进行调试，我的方法是空间下新建一个php文件，如foo.php，写入如下代码：
<?php
system("pwd");
system("sh /var/www/home/happysa/domains/happysa.org/public_html/scripts/feed.sh >log 2>&1");
?>
然后在浏览器里访问http://happysa.org/foo.php，就可以看到绝对路径并手动执行脚本了。
参考资料
http://blog.happysa.org/blog/solve_the_feed_problem_of_godaddy.html
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本文标题: godaddy免费空间wordpress后台错误的解决：（1）feed错误的解决方案
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