用 Wget 直接下载 OTN 上的 Oracle 安装文件

在 OTN 上下载文件，有的时候是比较烦人的事情。估计是出于负载均衡的原因，直接使用浏览器看到的地址还要经过几次 http 302 跳转才可以看到。而这个跳转是要带着 Session 走的，如果使用多线程下载工具就有可能到一个很小的错误页面文件。新版本的 FlashGet 就有这毛病。

如果准备安装的服务器在远程，参考这里的方法，用 Wget 直接下载其实也并不费事。

现通过浏览器获知该数据文件的 URL 地址。然后来个投石问路看看具体的跳转情况:

$ wget  --limit-rate=150k \
http://download.oracle.com/otn/linux/oracle10g/ \
10201/10201_database_linux_x86_64.cpio.gz                 
http://download.oracle.com/otn/linux/oracle10g/ \
10201/10201_database_linux_x86_64.cpio.gz
           => `10201_database_linux_x86_64.cpio.gz'
Resolving download.oracle.com... 213.35.100.1
Connecting to download.oracle.com[213.35.100.1]:80... connected.
HTTP request sent, awaiting response... 302 Found 

Location: http://download- 

west.oracle.com/otn/linux/oracle10g/10201/ 
10201_database_linux_x86_64.cpio.gz [following]
 
http://download-west.oracle.com/otn/linux/oracle10g/10201/ 
10201_database_linux_x86_64.cpio.gz 

           => `10201_database_linux_x86_64.cpio.gz'
Resolving download-west.oracle.com... 206.204.21.139
Connecting to download-west.oracle.com[206.204.21.139]:80... connected.
HTTP request sent, awaiting response... 302 Found 

Location: https://profile.oracle.com/jsp/realms/otnLogin.jsp? 

remoteIp=218.108.233.1&globalId=&redirectUrl=http%3a%2f%2fdownload- 
west.oracle.com%3a80%2fotn%2flinux%2foracle10g%2f10201% 
2f10201_database_linux_x86_64.cpio.gz [following]
--16:11:01--  https://profile.oracle.com/jsp/realms/otnLogin.jsp? 
remoteIp=218.108.233.1&globalId=&redirectUrl=http%3a%2f%2fdownload-
west.oracle.com%3a80%2fotn%2flinux%2foracle10g%2f10201%
2f10201_database_linux_x86_64.cpio.gz
           => `otnLogin.jsp? \
remoteIp=218.108.233.1&globalId=&redirectUrl=http:%2F%2Fdownload- 

west.oracle.com:80%2Fotn%2Flinux%2Foracle10g%2F10201% 
2F10201_database_linux_x86_64.cpio.gz'
Resolving profile.oracle.com... 141.146.8.116
Connecting to profile.oracle.com[141.146.8.116]:443... connected. 

HTTP request sent, awaiting response... 200 OK
Length: 4,106 [text/html]

输出实在是有点恶心，我在适当的地方做了换行处理。要在第二个 Location 处下手：

https://profile.oracle.com/jsp/realms/otnLogin.jsp?remoteIp=218.108.233.1&globalId=&redirectUrl=http%3a%2f%2fdownload-west.oracle.com%3a80%2fotn%2flinux%2foracle10g%2f10201%2f10201_database_linux_x86_64.cpio.gz

在这个地址后添加 &username=YOURPASSWORD&password=YOURPASSWORD&submit=Continue . YOURUSERNAME/YOURPASSWORD 是在 OTN 上的用户名与口令。然后提交如下的命令即可：

wget --limit-rate=128K  --post-data="https://profile.oracle.com/jsp/realms/otnLogin.jsp?  \
remoteIp=218.108.233.1&globalId=&redirectUrl=http%3a%2f%2fdownload- \
west.oracle.com%3a80%2fotn%2flinux%2foracle10g%2f10201% \
2f10201_database_linux_x86_64.cpio.gz \
&username=YOURUSERNAME&password=YOURPASSWORD&submit=Continue" \
https://profile.oracle.com/jsp/reg/loginHandler.jsp 

如果嫌输出麻烦，可以在最后 -o downloadOracle.log . 新开一个终端窗口 tail -f downloadOracle.log 就可以观察下载进度了。

要养成随时用 Unix 的习惯思考问题，还真是一个需要时间的事情 :)

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