proxy_pass in Openresty

[Amir Salar Pourhasan]

I want to check something in Lua and then proxy_pass in my target using Nginx code but does not work!

location /nt {
    default_type 'text/plain';
    content_by_lua_file check_parameters.lua;
}

In check_parameters.lua:

-- Client IP
local client_ip = ngx.var.remote_addr or ''


-- check IP blockage
local is_ip_allowed = check_ip( client_ip )
if is_ip_allowed == true then
    local url_params = extract_info( ngx.var.request_uri )

    -- check has parameters
    if (url_params['username'] == nil) or (url_params['password'] == nil) or (url_params['username'] == '') or (url_params['password'] == '') then
        ngx.say('Invalid request!')
    else
        -- Redis query key
        local user_redis_key = "line_" .. url_params['username'] .. '_' .. url_params['password']

        local searched_user = redis_find( user_redis_key ) -- by function in another file

        if searched_user['status'] == false then
            ngx.say( searched_user['msg'] )
        else
           
            -- user found in redis
            ngx.say('Request is fine! lets proxy_pass it to main server')


            -- ************** HERE I NEED TO PASS REQUEST TO THE MAIN SERVER BECAUSE THE REQUEST IS VALID. BUT HOW?????????????

        end
    end
else
    --  IP blocked
    ngx.say('Access forbidden')
end

How can I proxy_pass in Lua file?

[Igor Clark]

Hi Amir,

If I understand correctly you want to restrict access to the proxies resource using your Lua code below. Check out access_by_lua_file https://github.com/openresty/lua-nginx-module/blob/master/README.markdown#access_by_lua_file - you can run your auth checks in the access_by_lua_file block. Exit with 401/403 (as appropriate) if the checks fail, and return normally if not, then in the nginx config put the proxy_pass underneath the access_by_lua_file block. If all the checks pass, the execution should fall through to the proxy_pass block.

Cheers

Igor

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[Amir Salar Pourhasan]

Yeah it fixed. thanx