整理：web服务器改写响应内容的方式

**Nginx**: ngx_http_sub_module --> http://p.defau.lt/?A6UukYFKZrYLalJ5KOuTKg 
**Nginx**: Nginx + lua. LUA body_filter --> http://p.defau.lt/?0ZxLWENoEkFIRD17QlEtbQ 
**Apache**: Apache Module mod_substitute --> http://p.defau.lt/?IS8u2mnAQTSHs4qEl_MSFQ 
**Apache**: As of version 2.3 LUA can be used as a scripting language for Apache. Response body rewriting is possible there as well. --> http://p.defau.lt/?tTAqWfA8sezQZkmvI3LnFw 
**Varnish**: Possible, but hacky: https://github.com/aivarsk/libvmod-rewrite 
**HAproxy**: Not possible. Might be possible with LUA in the future

lua模块使用：

LuaOutputFilter myOutputFilter "/www/filter.lua" output_filter

  SetOutputFilter myOutputFilter

 

--[[
    Example output filter that escapes all HTML entities in the output
]]--
function output_filter(r)
    coroutine.yield("(Handled by myOutputFilter)
\n") -- Prepend some data to the output,
                                                          -- yield and wait for buckets.
    while bucket do -- For each bucket, do...
        local output = r:escape_html(bucket) -- Escape all output
        coroutine.yield(output) -- Send converted data down the chain
    end
    -- No more buckets available.
end

 

mod_substitute:

Example

    AddOutputFilterByType SUBSTITUTE text/html
    Substitute "s/foo/bar/ni"

 

Rewriting URLs embedded in proxied content
ProxyPass        "/blog/" "http://internal.blog.example.com/"
ProxyPassReverse "/blog/" "http://internal.blog.example.com/"

Substitute "s|http://internal.blog.example.com/|http://www.example.com/blog/|i"

 

 

来自：

https://serverfault.com/questions/789743/possibility-of-rewriting-response-bodies-in-different-webservers-nginx-apache

mod_substitute:

http://httpd.apache.org/docs/2.4/mod/mod_substitute.html

lua使用：

http://httpd.apache.org/docs/current/mod/mod_lua.html#luaoutputfilter