lighttpd配置子域名和重定向

前提是域名服务商支持泛域名，加这样三条A记录

beyondrails.com       120.72.34.135
www. beyondrails.com   120.72.34.135
*.beyondrails.com     120.72.34.135

1，重定向beyondrails.com到www.beyondrails.com

$HTTP["host"] =~ "^beyondrails\.com$" {
  url.redirect = ( "^/(.*)" => "http://www.beyondrails.com/$1" )
}

2，二级域名端口转发

$HTTP["host"] =~ "^.*\.beyondrails\.com$" {
  proxy.balance = "hash"
  proxy.server = (
    "" => (("host" => "127.0.0.1", "port" => 9999))
  )
}

3，具体的lighttpd配置

$HTTP["host"] =~ "^.*\.beyondrails\.com$" {
  server.document-root = #...
}

lighttpd的URL Rewrites配置语法:

url.rewrite-once = ( "<regex>" => "<relative-uri>" )

正则表达式:

Patterns ("wildcards") are matched against a string
pecial characters:
        * . (full stop) - match any character
        * * (asterisk) - match zero or more of the previous symbol
        * + (plus) - match one or more of the previous symbol
        * ? (question) - match zero or one of the previous symbol
        * \? (backslash-something) - match special characters
        * ^ (caret) - match the start of a string
        * $ (dollar) - match the end of a string
        * [set] - match any one of the symbols inside the square braces.
        * (pattern) - grouping, remember what the pattern matched as a special variable
        * {n,m} - from n to m times matching the previous character (m could be ommited to mean >=n times)
Normal alphanumeric characters are treated as normal

替换模式:

If the matched regex contains groups in parentheses, $1..$9 in the replacement refer to the captured text in the matching group "$1" meaning the first group, "$2" the second, and so on.

You can also use certain meta-patterns in replacement text:
    * %% => % sign
    * %0 => domain name + tld (Top Level Domain, like .com or .net)
    * %1 => tld
    * %2 => domain name without tld
    * %3 => subdomain 1 name
    * %4 => subdomain 2 name