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RE: Open more than one HTTP request to a host?

From: Sinha, Raj (Raj) <rajsinha@avaya.com>
Date: Wed, 7 May 2003 12:00:39 -0400
Message-ID: <8CA1128D59AD27429985B397118CEDDF019E30E6@nj7460avexu1.global.avaya.com>
To: <www-lib@w3.org>

This is great I see a lot of activity and some great email threads.

So I guess now is a good time to ask questions. For a beginner like me
who is in very preliminary stages of project I would like to know if I
can use the Libwww to write a Web client and also use it as a server.
For example I would like to accept HTTP POSTS made from a form on port
80 and also use the same code for to write a Web client.

I saw a example of a mini server(I think it was taken out...) but also
some corresponding email advising not to use it. Don't know why. Any
updates or suggestions.... 

Raj Sinha
 


-----Original Message-----
From: Alec H. Peterson [mailto:ahp@hilander.com] 
Sent: Wednesday, May 07, 2003 11:25 AM
To: www-lib@w3.org
Subject: Re: Open more than one HTTP request to a host?



> I think so, yes, at least for HTTP requests to the same port. However,

> IMHO this is a good decision, at least for pipelined HTTP hosts. 
> (FTP/HTTP1.0 is a different matter.)
>
> As always with libwww, it's probably possible to play some dirty 
> tricks to get around the limitation. For this, you somehow need to 
> fool HTHost_new() into creating another host object. For example, it 
> might be possible just to append "." to the hostname for a second 
> connection.

It's worth pointing out that I tried something similar to this that I 
_thought_ would work, but it caused some problems.  I was adding a
random 
integer to the hash value from 0 to 3 % the hash table size.  It seemed
to 
work at first, but for some sites it seemed to get into a deadlock for
some 
reason, where it was selecting on no file descriptors with no timeout.

I'm running in HTTP/1.1 mode with no pipelining.

I'd love to be able to get this to work with an arbitrary number of 
connections, but if the solution of appending a "." works that would be 
nice to just get double the throughput.

Alec

--
Alec H. Peterson -- ahp@hilander.com
Chief Technology Officer
Catbird Networks, http://www.catbird.com
Received on Wednesday, 7 May 2003 12:00:40 GMT

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