test-client.c

Language, Script, and Encoding Identification with String Kernel Classifiers

/*
** Copyright (C) 2006 Thai Computational Linguistics Laboratory (TCL)
** National Institute of Information and Communications Technology (NICT)
** Canasai Kruengkrai <canasai xx gmail yy com, where xx=at and yy=dot>
**
** This file is part of the `libs' library.
**
** This library is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/


#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <sys/types.h>   // definitions of a number of data types used in system calls
#include <sys/socket.h>  // definitions of structures needed for sockets
#include <netinet/in.h>  // constants and structures needed for internet domain addresses
#include <sys/signal.h>
#include <netdb.h>       // variable server is a pointer to a structure of type hostent

void error( char *msg )
{
    perror( msg );
    exit( 1 );
}

int main(int argc, char *argv[])
{
    int sockfd, portno, n;
    struct sockaddr_in serv_addr;
    struct hostent *server;
    char buffer[1024];

    if( argc < 4 ) 
    {
        fprintf( stderr, "usage: %s hostname port 'STRING'\n", argv[0] );
        exit( 0 );
    }

    portno = atoi( argv[2] );

    if( ( sockfd = socket( AF_INET, SOCK_STREAM, 0 ) ) < 0 ) 
        error( "ERROR opening socket" );

    if( ( server = gethostbyname( argv[1] ) ) == NULL ) 
    {
        fprintf( stderr,"ERROR, no such host\n" );
        exit( 0 );
    }

    if( strlen( argv[2] ) > 1024 ) 
    {
        fprintf( stderr,"ERROR, input string too long (> 1024)\n" );
        exit( 0 );
    }

    bzero( ( char * )&serv_addr, sizeof( serv_addr ) );
    serv_addr.sin_family = AF_INET;
    bcopy( ( char * )server->h_addr, 
           ( char * )&serv_addr.sin_addr.s_addr,
           server->h_length );
    serv_addr.sin_port = htons( portno );

    if( connect( sockfd, ( struct sockaddr * )&serv_addr, sizeof( serv_addr ) ) < 0 ) 
        error( "ERROR connecting" );

    fprintf( stderr, "# input string: `%s'\n", argv[3] );
    bzero( buffer, 1024 );
    strcpy( buffer, argv[3] );

    n = write( sockfd, buffer, strlen( buffer ) );
    if( n < 0 ) 
        error( "ERROR writing to socket" );

    bzero( buffer, 1024 );
    n = read( sockfd, buffer, 255 );
    if( n < 0 ) 
        error( "ERROR reading from socket" );

    printf( "# client receives: `%s'\n", buffer );

    return( 0 );
}