From: Nathan Taylor <onebitcipher@...>
Date: 2007-01-04T04:09:35+09:00
Subject: Re: how to properly format data when using TCPSocket.send()

> I tried using "\r\n\r\n", but I'm still having some problems due to the 
> way the HTTP protocol uses multiple TCP sessions and my lack of 
> understanding on how to handle that with Net::TCPSocket.  


I just wanted to add some comments about using TCPSocket that might help 
others as myself.

I found out that the problem I was having with TCPSocket was a problem 
with the closing of the session.  I was sending some data to craft an 
HTTP SEARCH request using the format client = TCPSocket.new(host, 80); 
data = "SEARCH /vroot/folder/ HTTP/1.1
Content-Type: text/xml
Content-Length: 253
Host: server.tld


<?xml version=\"1.0\"?>
<D:searchrequest xmlns:D = \"DAV:\">
   <D:sql>
   SELECT \"DAV:contentclass\", \"DAV:displayname\"
   FROM \"/vroot/folder/\"
   WHERE \"DAV:ishidden\" = false
     AND \"DAV:isfolder\" = false
   </D:sql>
</D:searchrequest>"

client.send(data, 0)
response = client.recvfrom(1024)
puts response
client.close

However this would just cause the script to hang at the command line and 
the web server would never send it's response until I sent an interrupt 
to the running script.  I realized through some tcpdump magic that the 
web server would send the response after I killed the script so I 
modified the end of the code to;

client.send(data, 0)
client.shutdown( how=1 )
response = client.recvfrom(1024)
puts response
client.close

It works.. Everyone's happy.  This is just an FYI for anyone running in 
to a similar problem implementing a network client, sorry for the 
verboseness.

- Nathan


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