Re: Lua issues

[Brendan Coles <bcoles () gmail com>]

Hi Peak,

I'm not sure about the differences between the latest lua and the lua used
in nmap NSE, if any.

However, if you want to access the HTTP headers you can use the table
req["rawheader"] rather than req["header"]

Here's an example which loops through all HTTP headers and returns all
matches for "server" :

        local result = {}
        local path = "/"

        -- Retrieve headers
        stdnse.print_debug(1, ("%s: Connecting to %s:%s"):format(SCRIPT_NAME,
host.targetname or host.ip, port.number))
        data = http.get(host, port, path)
        if not data then
                stdnse.print_debug(1, "%s: Failed to retrieve HTTP headers.", SCRIPT_NAME)
                return
        end

        -- Extract server headers
        stdnse.print_debug(2, "%s: HTTP %s: %s", SCRIPT_NAME, data.status, path)
        for line, header in ipairs(data["rawheader"]) do
                local server_match = string.match(header, '[Ss]erver: (.+)')
                if server_match then table.insert(result, string.format("%s",
server_match)) end
        end

        -- Return results
        stdnse.print_debug(1, ("%s: %s:%s returned %s server
headers."):format(SCRIPT_NAME, host.targetname or host.ip,
port.number, #result))
        return stdnse.format_output(true, result)



Here's the full script the example was taken from:
https://gist.github.com/1736948

Hope this helps.


On Mon, Feb 6, 2012 at 10:14 PM, CheesStick peak <crnxyrnx () gmail com> wrote:

> Hello
>
> Im currently working with the nmap script engine and with lua.
> Im more into perl but i wanted to give lua a try so I started scripting a
> bit.
>
> Now it looks for me that the nse is not working like normal lua. I have an
> example according my work with tables:
>
>
> local table= { 123, 231 , "aaa" , xxx = { "x1", "x2"} , 666 , test="showme"
> , 777 }
>
> now when I do:
> for i,v in ipairs(table) do print(i,v) end
>
> it gives me:
> 1    123
> 2    231
> 3    aaa
> 4    666
> 5    777
> (the same does table.concat(table,"\n") btw.)
>
> BUT, according to different lua sites it should be:
> 1      123
> 2      231
> 3      aaa
> 4      table: 0035xxxx
> 5      666
> test  showme
> 7      777
>
> ... ?
>
> So i hope you can help me, because all I want is to know what http header
> http.get gives me back:
>
> local req = http.get ( "example.com" , 80, "/index.php")
> print req.status         -- 200
> print (req['header'])     --table: 0x97874a0
> print (table.getn(req['header']))    --- erm... what??wtf?
>
> sincerely
>
> peak
> _______________________________________________
> Sent through the nmap-dev mailing list
> http://cgi.insecure.org/mailman/listinfo/nmap-dev
> Archived at http://seclists.org/nmap-dev/



-- 
Brendan Coles
http://itsecuritysolutions.org/
_______________________________________________
Sent through the nmap-dev mailing list
http://cgi.insecure.org/mailman/listinfo/nmap-dev
Archived at http://seclists.org/nmap-dev/