ngxregsub.md

ngx.re.gsub

语法: newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)

环境: init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*

就象 ngx.re.sub, 但执行全局替换。

下面是例子:

 local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", "[$0,$1]", "i")
 if newstr then
     -- newstr == "[hello,h], [world,w]"
     -- n == 2
 else
     ngx.log(ngx.ERR, "error: ", err)
     return
 end

 local func = function (m)
     return "[" .. m[0] .. "," .. m[1] .. "]"
 end
 local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", func, "i")
     -- newstr == "[hello,h], [world,w]"
     -- n == 2

这个方法需要在 Nginx 中启用 PCRE 库。 (Known Issue With Special Escaping Sequences).

这个功能最早出现在 v0.2.1rc15 版本中。

English Source

syntax: newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)

context: init_worker_by_lua*, set_by_lua*, rewrite_by_lua*, access_by_lua*, content_by_lua*, header_filter_by_lua*, body_filter_by_lua*, log_by_lua*, ngx.timer.*

Just like ngx.re.sub, but does global substitution.

Here is some examples:

 local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", "[$0,$1]", "i")
 if newstr then
     -- newstr == "[hello,h], [world,w]"
     -- n == 2
 else
     ngx.log(ngx.ERR, "error: ", err)
     return
 end

 local func = function (m)
     return "[" .. m[0] .. "," .. m[1] .. "]"
 end
 local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", func, "i")
     -- newstr == "[hello,h], [world,w]"
     -- n == 2

This method requires the PCRE library enabled in Nginx. (Known Issue With Special Escaping Sequences).

This feature was first introduced in the v0.2.1rc15 release.

返回目录