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Completato esercizio di gestioen database client-server. Archivio.txt e comandi aggiungi nome voto,verifica nome.

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This commit is contained in:
Giovanni Di Grezia
2014-05-30 23:33:12 +02:00
parent 94be6252dd
commit 619c07cae2
25 changed files with 286 additions and 136 deletions
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7
11.client-server-exam-database (COMPLETE)/archivio.txt Executable file
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@@ -0,0 +1,7 @@
MARIO 30 127.0.0.1:37968
FONZO 15 127.0.0.1:37968
CARLO 14 127.0.0.1:37981
MARIO 1950 127.0.0.1:38094
ARTUR 150 127.0.0.1:38099
KOMBAT 150 127.0.0.1:38099

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11.client-server-exam-database (COMPLETE)/archivio.txt~ Executable file
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@@ -0,0 +1,7 @@
MARIO 30 127.0.0.1:37968
FONZO 15 127.0.0.1:37968
CARLO 14 127.0.0.1:37981
MARIO 1950 127.0.0.1:38094
ARTUR 150 127.0.0.1:38099
KOMBAT 150 127.0.0.1:38099
ione fornita da 127.0.0.1:38099 150 127.0.0.1:38099

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11.client-server-exam-database (COMPLETE)/daytimecli.c Normal file
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@@ -0,0 +1,136 @@
#include "../basic.h"
#include <unistd.h>
void sigpipeaction (int signal){
//fprintf(stderr, "Sigpipe catturato\n");
}
typedef struct message {
char data [50];
char nome [50];
char voto [50];
}t_message;
int main(int argc, char **argv) {
struct sigaction sigpipestructure;
sigpipestructure.sa_handler = sigpipeaction;
sigpipestructure.sa_flags = 0;
sigaction (SIGPIPE, &sigpipestructure, NULL);
int sockfd;
struct sockaddr_in servaddr;
if (argc != 3){
printf("usage: daytimecli <indirizzoIP> <porta> \n");
exit(0);
}
if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
printf("socket error\n");
exit(0);
}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(atoi(argv[2])); /* server port */
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
printf("inet_pton error for %s\n", argv[1]);
exit(0);
}
if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
printf("connect error\n");
exit(0);
}
int ridden;
int written;
t_message m;
//// welcome from server - first message
for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
if (errno == EINTR){continue;} else {exit(0);}
}
fprintf(stdout,"Server: %s\n",m.data);// answer from server
char line [1000];
char line_data [50];
char line_nome [50];
char line_voto [50];
for(; ;){
fprintf(stdout, "Inserisci comando: ");
fscanf (stdin,"%999[^\n]%*c",line);
sscanf (line, "%s", line_data);
if (strcmp("AGGIUNGI",line_data) == 0 || strcmp("VERIFICA",line_data) == 0){
if (strcmp("AGGIUNGI",line_data) == 0 ){
sprintf(m.data,"AGGIUNGI");
sprintf(line_nome,"def");
sprintf(line_voto,"def");
sscanf (line, "%*s %s %s", line_nome,line_voto);
if (strcmp(line_nome,"def") == 0 || strcmp(line_voto,"def") == 0){
fprintf(stdout,"Comando invalido\n");
continue;
}else{
sprintf(m.nome,"%s",line_nome);
sprintf(m.voto,"%s",line_voto);
}
} else {
sprintf(m.data,"VERIFICA");
sprintf(line_nome,"def");
sscanf (line, "%*s %s ", line_nome);
if (strcmp(line_nome,"def") == 0 ){
fprintf(stdout,"Comando invalido\n");
continue;
}else{
sprintf(m.nome,"%s",line_nome);
}
}
for (written = write (sockfd, &m, sizeof (m) ); written == -1; written = write (sockfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
if (errno == EINTR){continue;} else {exit(0);}
}
fprintf(stdout,"Server: %s\n",m.data);// answer from server
} else {
sprintf(m.data,"Bye");
for (written = write (sockfd, &m, sizeof (m) ); written == -1; written = write (sockfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
for (ridden = read (sockfd,&m,sizeof(m)); ridden <= 0;ridden = read (sockfd,&m,sizeof(m))){
if (errno == EINTR){continue;} else {exit(0);}
}
fprintf(stdout,"Server: %s\n",m.data);// answer from server
break;
}
}
exit(0);
}

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11.client-server-exam-database/daytimecli.c~ → 11.client-server-exam-database (COMPLETE)/daytimecli.c~
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11.client-server-exam-database/daytimesrv.c → 11.client-server-exam-database (COMPLETE)/daytimesrv.c
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@@ -17,6 +17,13 @@ void sigchldaction (int signal){
}
void sigpipeaction (int signal){
//fprintf(stderr, "Sigpipe catturato\n");
}
typedef struct message {
@@ -27,13 +34,22 @@ typedef struct message {
int main(int argc, char **argv) {
//////////////////////////////////////////////////////////// SIGNALS
///////SIGCHLD
struct sigaction sigchldstructure;
sigchldstructure.sa_handler = sigchldaction;
sigchldstructure.sa_flags = 0;
sigaction (SIGCHLD, &sigchldstructure, NULL);
///////SIGPIPE
struct sigaction sigpipestructure;
sigpipestructure.sa_handler = sigpipeaction;
sigpipestructure.sa_flags = 0;
sigaction (SIGPIPE, &sigpipestructure, NULL);
//////////////////////////////////////////////////////////// END SIGNALS
int listenfd, connfd, n;
struct sockaddr_in servaddr;
@@ -87,13 +103,14 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
close(listenfd);
t_message m; // buffer message structure
int ridden, wrote;
int ridden, written;
sprintf ( m.data, "Benvenuto" );
wrote = write (connfd, &m, sizeof (m) ); // scrivo benvenuto sul socket
// check wrote
//write with error check
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
inet_ntop(AF_INET, &(client_addr.sin_addr), buff, INET_ADDRSTRLEN); // get client address
port = ntohs(client_addr.sin_port);// get client port
@@ -101,8 +118,10 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
for ( ; ; ) {// the server child reserve other requests from same client
ridden = read (connfd,&m,sizeof(m));
// check read. it's blocking
for (ridden = read (connfd,&m,sizeof(m)); ridden <= 0;ridden = read (connfd,&m,sizeof(m))){
if (errno == EINTR){continue;} else {exit(0);}
}
int fd;
@@ -111,29 +130,33 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
if (fd < 0){
fd = open ("archivio.txt", O_CREAT | O_RDWR | O_APPEND ,00700);
}
if (fd < 0){
sprintf ( m.data, "Non posso modificare il database" );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
} else {
if (fd < 0){
sprintf ( m.data, "Non posso modificare il database" );
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
} else {
// local writes. no checks
write (fd,(m.nome), strlen ((m.nome)));
write (fd," ", 1);
write (fd,(m.voto), strlen ((m.voto)) );
write (fd," ", 1);
write (fd,buff, strlen (buff));
write (fd,":", 1);
char port_char[50];
sprintf (port_char,"%hu",port);
write (fd,port_char, strlen (port_char));
write (fd,"\n", 1);
sprintf ( m.data, "AGGIUNTO" );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
close(fd);
}
} else {
if (strcmp (m.data, "VERIFICA" ) == 0 ){
@@ -141,8 +164,9 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
fd = open ("archivio.txt",O_RDONLY);
if (fd < 0){
sprintf ( m.data, "Non posso leggere il database" );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
} else {
char line [1000];
@@ -154,7 +178,7 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
found = 0;
FILE * fdfile = fdopen(fd,"r");
returned = fscanf (fdfile,"%999[^\n]%*c",line);
for( ; returned > 0 ; fscanf (fdfile,"%999[^\n]%*c",line) ){
for( ; returned > 0 ; returned = fscanf (fdfile,"%999[^\n]%*c",line) ){
sscanf (line, "%s %s %s", line_nome, line_voto, line_ip_port);
@@ -162,8 +186,9 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
found = 1;
sprintf ( m.data, "%s ha sostenuto l'esame con voto %s. Informazione fornita da %s ", line_nome, line_voto, line_ip_port );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
break;
}
@@ -171,17 +196,20 @@ sigaction (SIGCHLD, &sigchldstructure, NULL);
}
if (found == 0){
sprintf ( m.data, "%s non ha sostenuto l'esame", &(m.nome) );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
sprintf ( m.data, "%s non ha sostenuto l'esame", m.nome );
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
}
}
close(fd);
}
} else {
sprintf ( m.data, "Bye" );
wrote = write (connfd, &m, sizeof (m) ); // scrivo sul socket
// check wrote
for (written = write (connfd, &m, sizeof (m) ); written == -1; written = write (connfd, &m, sizeof (m)) ){
if (errno == EINTR){continue;} else {exit(0);}
}
break; // end requests from client

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11.client-server-exam-database (COMPLETE)/readme Normal file
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@@ -0,0 +1,16 @@
SONO STATI CALCOALTI ERRORI SU READ,WRITE,CONNECT,SIGNALS
IL SERVER E' RICORSIVO E LE READ/WRITE SONO BLOCCANTI (SENZA SELECT)
PROTOCOLLO USATO TCP
il server gestisce un file archivio.txt
il client puo inviare:
BYE - per chiudere la connessione
AGGIUNGI <NOME> <VOTO> - per far aggiungere un nome al server
VERIFICA <NOME> - per verificare se un nome è presente nel database del server
il server risponde:
BYE - A BYE
AGGIUNTO - AL COMANDO AGGIUNGI DEL CLIENT
EVENTUALI INFORMAZIONI SUI DATI - AL COMADNO VERIFICA

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11.client-server-exam-database (COMPLETE)/readme~ Normal file
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@@ -0,0 +1,14 @@
SONO STATI CALCOALTI ERRORI SU READ,WRITE,CONNECT,SIGNALS
il server gestisce un file archivio.txt
il client puo inviare:
BYE - per chiudere la connessione
AGGIUNGI <NOME> <VOTO> - per far aggiungere un nome al server
VERIFICA <NOME> - per verificare se un nome è presente nel database del server
il server risponde:
BYE - A BYE
AGGIUNTO - AL COMANDO AGGIUNGI DEL CLIENT
EVENTUALI INFORMAZIONI SUI DATI - AL COMADNO VERIFICA

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@@ -1,106 +0,0 @@
#include "../basic.h"
#include <unistd.h>
void sigpipeaction (int signal){
int status, pid;
fprintf(stderr, "Sigpipe catturato\n");
}
int main(int argc, char **argv) {
struct sigaction sigpipestructure;
sigpipestructure.sa_handler = sigpipeaction;
sigpipestructure.sa_flags = 0;
sigaction (SIGPIPE, &sigpipestructure, NULL);
siginterrupt (SIGPIPE,1);
int sockfd;
struct sockaddr_in servaddr;
if (argc != 3){
printf("usage: daytimecli <indirizzoIP> <porta> \n");
exit(0);
}
if( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0 ){
printf("socket error\n");
exit(0);
}
bzero(&servaddr, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(atoi(argv[2])); /* server port */
if (inet_pton(AF_INET, argv[1], &servaddr.sin_addr) <= 0){
printf("inet_pton error for %s\n", argv[1]);
exit(0);
}
if (connect(sockfd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0){
printf("connect error\n");
exit(0);
}
struct sockaddr_in r_server_local_addr;
unsigned int r_server_local_addr_len = sizeof(r_server_local_addr);
char * socket_buffer = (char *) malloc (r_server_local_addr_len) ;
int ridden;
int written;
sleep(5);
int i;
for ( i = 0; i < 5; i ++){
ridden = read (sockfd, socket_buffer,r_server_local_addr_len );
if (ridden < 0){
fprintf(stdout,"Errore durante la lettura\n");
exit(-1);
} else {
fprintf(stdout,"Ho letto %d bytes\n",ridden);
}
}
for ( i = 0; i < 1; i ++){
written = write (sockfd, socket_buffer,r_server_local_addr_len /2 );
if (written < 0){
fprintf(stdout,"Errore durante la scrittura\n");
exit(-1);
} else {
fprintf(stdout,"Ho scritto %d bytes\n",written);
}
}
memcpy (&r_server_local_addr,socket_buffer, r_server_local_addr_len);
char buff[INET_ADDRSTRLEN];
short port;
inet_ntop(AF_INET, &(r_server_local_addr.sin_addr), buff, INET_ADDRSTRLEN);// get ip
port = ntohs(r_server_local_addr.sin_port);// get port
fprintf (stdout,"%s%c%hu\n",buff,':',port);
exit(0);
}

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@@ -0,0 +1,24 @@
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
int main (int index, char** in_data){
char a [100];
char b;
char c [100];
char d [100];
sprintf(d,"eeee");
sprintf(a,"alfred ");
sscanf (a,"%s%s",c,d);
fprintf(stdout,"%s\n",c);
fprintf(stdout,"%s\n",d);
return 0;
}

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@@ -0,0 +1,24 @@
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>
int main (int index, char** in_data){
char a [100];
char b;
char c [100];
char d [100];
sprint(d,"eeee");
sprintf(a,"alfred ");
sscanf (a,"%s%s",c,d);
fprintf(stdout,"%s\n",c);
fprintf(stdout,"%s\n",d);
return 0;
}