SHOUTcast fetch request denied every time with 404 - sockets

Question

Code
function radiotest(host,port)
local rstr="Online"
local sock, err = socket.tcp()
if not sock then
return "Failed"
end
sock:settimeout(1)
local res, err = sock:connect(host, port)
if not res then
return "offline"
else
sock:settimeout(1)
sock:send("GET /index.html HTTP/1.0\r\n UserAgent: SHOUTcast Song Status \r\n Accept: */*\r\n\r\n")
sock:settimeout(3)
local data=sock:receive('*a')
sock:close()
print(data)
-- Further processing content here
end
end
print( radiotest( "10.*.*.*", 1234 ) )
The above socket connection returns me:
ICY 404 Resource Not Found
icy-notice1:<BR>SHOUTcast Distributed Network Audio Server/win32 v1.9.7<BR>
icy-notice2:The resource requested was not found<BR>
I think the problem is in my headers listing, but I'm unable to trace it.
The page opens fine in all browsers(Opera does need to be masked as another browser; otherwise it just keeps on downloading all songs).
I've tried using following strings inside sock:send()
GET /index.html HTTP/1.0\r\n UserAgent: SHOUTcast Song Status (Mozilla Compatible)\r\n\r\n
GET /index.html HTTP/1.0\r\n UserAgent: Opera/9.80 (Windows NT 6.1; Win64; x64) Presto/2.12.388 Version/12.12\r\n\r\n
GET /index.html HTTP/1.0\r\n UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.57 Safari/537.17\r\n\r\n
I'm totally stuck at this part. How do I fetch the page using socket.tcp()?

Answer 1

After looking at your packet capture, it seems that what is actually getting sent over the wire is wrong. Your user-agent string isn't making it:
> GET /index.html HTTP/1.0
< ICY 404 Resource Not Found
< icy-notice1:<BR>SHOUTcast Distributed Network Audio Server/win32 v1.9.7<BR>
< icy-notice2:The resource requested was not found<BR>
If you don't specify a user-agent that contains Mozilla, you will be unable to access the admin interface, or any part of it. Go back and check your code again on what you're sending.

Answer 2

#Brad Thanks. Your help with Wireshark was indeed practicable. The User-Agent header was not being passed to the server because of an extra space I was providing in the request.
sock:send("GET /index.html HTTP/1.0\r\n UserAgent: SHOUTcast Song Status \r\n Accept: */*\r\n\r\n")
The \r\n UserAgent: SHOUTcast Song Status should instead be:
\r\nUser-Agent: SHOUTcast Song Status
And it is working fine now.
Thanks for the help. :D
The results from the function after filtering out the HTML is like:
Online(Tonic - If You Could Only See)
Online(Tonic - If You Could Only See) Stream is up at 256 kbps with 0 of 32 listeners (0 unique)