正在开发的web站点提供语音文件给用户播放，发现iPhone 在播放MP3文件的时候遇到了一些问题，而从其他一些类似网站上下载的MP3文件却没有遇到这个问题。
第一直觉是MIME类型不对，但是比较了一下，都是一样的。iPhone里面点击MP3的连接之后会自动使用QuickTime播放器打开，然而QT直接弹出无法识别该链接……
经过一番搜索，终于在Google的iPhoneWebDev论坛上找到了一个很有用的帖子：
[quote]
Configure Your Server
HTTP servers hosting media files for iPhone must support byte-range
requests, which iPhone uses to perform random access in media
playback. (Byte-range support is also known as content-range or
partial-range support.) Most, but not all, HTTP 1.1 servers already
support byte-range requests.
If you are not sure whether your media server supports byte-range
requests, you can open the Terminal application in Mac OS X and use
the curl command-line tool to download a short segment from a file on
the server:
curl -range 0-99http://example.com/test.mov-o/dev/null
If the tool reports that it downloaded 100 bytes, the media server
correctly handled the byte-range request. If it downloads the entire
file, you may need to update the media server. For more information on
curl, see Mac OS X Man Pages.
Ensure that your HTTP server sends the correct MIME types for movie
family file suffixes shown in the following table.
File name suffix MIME type
.mov video/quicktime
.mp4 video/mp4
.m4v video/x-m4v
.3gp video/3gpp
Be aware that iPhone supports movies greater than 2 GB. However, some
older web servers are not able to serve files this large. Apache 2
supports downloading files greater than 2GB.
RTSP is not supported.
[/quote]
原来是要在Web Host上支持Content-Range的选择，本来Apache和Tomcat 5.5的HTTP1.1实现是默认支持该Request Header的，刚好Servlet中绕过了Default Servlet的控制，自行实现了读文件并下发的功能，于是导致了这个问题。
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