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8devices Community - View topic - LUA program executing with UHTTPD
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 LUA program executing with UHTTPD 
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emmerichoma

Joined: 18 Jan 2013, 12:13
Posts: 8
Post LUA program executing with UHTTPD
Hi

I have started to develop LUA programs with UHTTPD, however, I am stuck as follows:

my HTTPD configuration:
root@OpenWrt:~# uci show uhttpd
uhttpd.main=uhttpd
uhttpd.main.listen_http=0.0.0.0:80
uhttpd.main.listen_https=0.0.0.0:443
uhttpd.main.home=/www
uhttpd.main.rfc1918_filter=1
uhttpd.main.max_requests=3
uhttpd.main.cert=/etc/uhttpd.crt
uhttpd.main.key=/etc/uhttpd.key
uhttpd.main.cgi_prefix=/cgi-bin
uhttpd.main.script_timeout=60
uhttpd.main.network_timeout=30
uhttpd.main.tcp_keepalive=1
uhttpd.main.lua_handler=/usr/lib/lua/luci/sgi/uhttpd.lua
uhttpd.main.lua_prefix=/cgi-bin
uhttpd.px5g=cert
uhttpd.px5g.days=730
uhttpd.px5g.bits=1024
uhttpd.px5g.country=DE
uhttpd.px5g.state=Berlin
uhttpd.px5g.location=Berlin
uhttpd.px5g.commonname=OpenWrt

my LUA program
root@OpenWrt:/www/cgi-bin# cat cgiinlua
#!/usr/bin/lua

--[[
This is a simple demonstration of CGI (Common Gateway
Interface) programming in Lua.
]]

print ("Content-type: Text/html\n")

local info = os.getenv("QUERY_STRING")
local params = {}
local echo = {}

for name, value in string.gmatch(info .. '&', '(.-)%=(.-)%&') do
value = string.gsub(value , '%+', ' ')
value = string.gsub(value , '%%(%x%x)', function(dpc)
return string.char(tonumber(dpc,16))
end )
params[name] = value

value = string.gsub(value, "%&", "&")
value = string.gsub(value, "%<", "&lt;")
value = string.gsub(value, '%"', "&quot;")
echo[name] = value

end

pagetop = [[<html><head><title>A Web page in Lua</title></head>
<body text=blue><h1>Calculate VAT at 15.0%</h1>
A Lua script with form fill ... <br><br>
<form>Net amount: <input name=net> and <input type=submit value="go!"></form>
<br><br>Result:<br><br>
]]
print (pagetop)

if params["net"] ~= "" and params["net"] ~= nil then
inval = tonumber(params["net"])
if inval == nil then
print ("Not a number - can't calculate")
else
print (inval * 1.15)
end
print ("<br><i>input value was</i><br>")
print (echo["net"])
else
print "<i>will appear here</i>"
end

pagebase = [[<br><br>
Sample Page in Lua by
<a href=http://www.wellho.net>Well House Consultants</a> &copy; 2008
</body></html>
]]

print (pagebase)



I have tried different directories in /www (e.g. /lua instead of /cgi-bin) and different configs (e.e. from OpenWrt web site), however, when calling the program from the browser (192.168.0.188/cgiinlua) then the browser (both IE and Chrome) only print the lua file, but not displays the HTML as expected.

Also, I have a problem restarting the UHTTP server. stop works, but restart fails, the server displays

root@OpenWrt:/usr/bin# uhttpd restart
Error: No sockets bound, unable to continue
root@OpenWrt:/usr/bin# uhttpd restart -p 80
bind(): Address already in use
bind(): Address already in use
Error: No sockets bound, unable to continue


Would very much appreciate help, thanks Emmerich
24 Jan 2013, 16:30
Profile
emmerichoma

Joined: 18 Jan 2013, 12:13
Posts: 8
Post Re: LUA program executing with UHTTPD
I am still not any further despite trying all kinds of deroutes.

I have though found that there is no file uhttpd.lua in the directory usr/lib/lua/luci/sgi

Is that a concern? Where should I get the file from?


Since I am pretty desparate would appreciate any possible help. :?

Emmerich
10 Mar 2013, 16:45
Profile
bluespray

Joined: 26 May 2012, 01:19
Posts: 66
Post Re: LUA program executing with UHTTPD
What does this have anything to do with carambola? You're better off asking openwrt forum.
10 Mar 2013, 19:39
Profile
emmerichoma

Joined: 18 Jan 2013, 12:13
Posts: 8
Post Re: LUA program executing with UHTTPD
Hi Bluespray

had a few days with members from the OpenWrt community, see that forum .... (openwrt.org ... forum ... general discussion)

However, they could not help and it sounds like the problem is deeper in the way how Luci, uHTTPD and Lua have been set up on the Carambola device, which seems unique.

The latest simple program we tested with is as follows
#!/usr/bin/lua


local function main()
print("Content-Type: text/html")
print("")
print("<!DOCTYPE html>")
print("Hello World! ... wenn nicht.")
end


main()


They said it works fine on their installations (we compared syntax, config files, etc), it just doesn't get interpreted by lua when put into the /www/cgi-bin directory and called 192.168.0.114/cgi-bin/main.lua


Since I don't know any further at this time I may have now to put the Carambola device onto the shelf, reluctantly ... unless miracles will happen :cry: .

Thanks and regards, Emmerich
13 Mar 2013, 22:43
Profile
herby

Joined: 14 Mar 2013, 16:24
Posts: 2
Post Re: LUA program executing with UHTTPD
Hello,
I just have the same problems:
Tried it with
Php
Lua
Sh
Scripts...
The scripts run perfectly from the shell, but not
via uhttpd -> browser only asks to dowload/save the
Script file. (Cache off, various browsers tested...)

I'll try busybox httpd or lighttpd...
15 Mar 2013, 17:45
Profile
moinmoin

Joined: 20 Mar 2013, 18:45
Posts: 1
Post Re: LUA program executing with UHTTPD
20 Mar 2013, 18:59
Profile
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