所以我想自动将file upload到Rackspace。 以下是我需要做的事情：
首先，我input：
curl -D - \ -H "X-Auth-Key: 123456789abcdefghijk" \ -H "X-Auth-User: MyUsername" \ https://auth.api.rackspacecloud.com/v1.0 这给了我一个回应，例如：
HTTP/1.1 204 No Content Server: Apache/2.2.3 (Red Hat) vary: X-Auth-Token,X-Auth-Key,X-Storage-User,X-Storage-Pass X-Storage-Url: https://storage101.ord1.clouddrive.com/v1/BlahBlah Cache-Control: s-maxage=46818 Content-Type: text/xml Date: Tue, 07 Feb 2012 05:07:09 GMT X-Auth-Token: SOME_AUTH_TOKEN_I_NEED X-Storage-Token: blahblah X-Server-Management-Url: https://servers.api.rackspacecloud.com/v1.0/123456 Connection: Keep-Alive X-CDN-Management-Url: https://cdn2.clouddrive.com/v1/BlahBlah
接下来，我需要上传一个文件：
curl -X PUT -T foo.txt -D - \ -H "ETag: 7849eb8d56581fa7c4896bb0db64892c" \ -H "Content-Type: text/plain" \ -H "X-Auth-Token: SOME_AUTH_TOKEN_I_NEED" \ -H "X-Object-Meta-Screenie: Test" \ https://storage101.ord1.clouddrive.com/v1/BlahBlah/MyBackup/foo.txt
所以基本上，我需要parsingauth令牌（X-Auth-Token）以及存储URL（X-Storage-Url）并dynamic构build下一个命令。
有没有办法做到这一点与shell脚本，也许使用正则expression式或什么？ 任何指针将不胜感激！
肯定有一个比这个更优雅的解决scheme，但是从我的头顶来看，一个快速和肮脏的bash的方式是这样的：
#!/bin/bash xauthtoken=`curl -D - \ -H "X-Auth-Key: 123456789abcdefghijk" \ -H "X-Auth-User: MyUsername" \ https://auth.api.rackspacecloud.com/v1.0 | grep X\-Auth\-Token | awk '{print $2}'` xstorageurl=`curl -D - \ -H "X-Auth-Key: 123456789abcdefghijk" \ -H "X-Auth-User: MyUsername" \ https://auth.api.rackspacecloud.com/v1.0 | grep X\-Storage\-Url | awk '{print $2}'` curl -X PUT -T foo.txt -D - \ -H "ETag: 7849eb8d56581fa7c4896bb0db64892c" \ -H "Content-Type: text/plain" \ -H "X-Auth-Token: ${xauthtoken}" \ -H "X-Object-Meta-Screenie: Test" \ $xstorageurl