C Socket Client/Server Fork Loop


 
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Old 01-22-2011
C Socket Client/Server Fork Loop

Hello people.

I'm trying to do something like a search engine.
Server runs in the background by using ./server & which has data from a textfile stored in an array.
Client then runs by using ./client
It will then prompt "Search for:"

For example, if I searched for Products called Instant Noodles
Server will return me result:
Product : Instant Noodle
Price : $10
If there's no such product, it will return "No such product"

I've already done it up to here.
Problem is, I want to make the client loop, after it finishes searching for a product, "Search for:" will appear again. The socket connection will only end when the user types in "end"
I can make it end by typing "end", but not the loop for search.
How can I do this?
I'm currently using the fork() command to handle multiple clients.

Thanks in advance.
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Net::Server::Proto::SSL(3)				User Contributed Perl Documentation				Net::Server::Proto::SSL(3)

NAME
Net::Server::Proto::SSL - Net::Server SSL protocol. SYNOPSIS
See Net::Server::Proto. DESCRIPTION
Experimental. If anybody has any successes or ideas for improvment under SSL, please email <paul@seamons.com>. Protocol module for Net::Server. This module implements a secure socket layer over tcp (also known as SSL). See Net::Server::Proto. There is a limit inherent from using IO::Socket::SSL, namely that only one SSL connection can be maintained by Net::Server. However, Net::Server should also be able to maintain any number of TCP, UDP, or UNIX connections in addition to the one SSL connection. Additionally, getline support is very limited and writing directly to STDOUT will not work. This is entirely dependent upon the implementation of IO::Socket::SSL. getline may work but the client is not copied to STDOUT under SSL. It is suggested that clients sysread and syswrite to the client handle (located in $self->{server}->{client} or passed to the process_request subroutine as the first argument). PARAMETERS
In addition to the normal Net::Server parameters, any of the SSL parameters from IO::Socket::SSL may also be specified. See IO::Socket::SSL for information on setting this up. BUGS
Christopher A Bongaarts pointed out that if the SSL negotiation is slow then the server won't be accepting for that period of time (because the locking of accept is around both the socket accept and the SSL negotiation). This means that as it stands now the SSL implementation is susceptible to DOS attacks. To fix this will require deviding up the accept call a little bit more finely which may not yet be possible with IO::Socket::SSL. Any ideas or patches on this bug are welcome. LICENCE
Distributed under the same terms as Net::Server THANKS
Thanks to Vadim for pointing out the IO::Socket::SSL accept was returning objects blessed into the wrong class. perl v5.12.1 2007-02-03 Net::Server::Proto::SSL(3)