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Client

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This commit is contained in:
Patrik Karasek 2023-10-20 20:47:17 +02:00
parent 35169e2e53
commit ddef20a8e7
1 changed files with 67 additions and 18 deletions
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85
client.cpp
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@ -7,6 +7,7 @@
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
/////////////////////////////////////////////////////////////////////////////// ///////////////////////////////////////////////////////////////////////////////
#define BUF 1024 #define BUF 1024
@ -85,30 +86,78 @@ int main(int argc, char **argv)
printf("%s", buffer); // ignore error printf("%s", buffer); // ignore error
} }
do do {
{ printf("Please specify a command (SEND, LIST, READ, DEL, QUIT): ");
printf(">> "); if (fgets(buffer, BUF - 1, stdin) != NULL)
if (fgets(buffer, BUF - 1, stdin) != NULL) {
{ size = strlen(buffer);
int size = strlen(buffer); if (buffer[size - 2] == '\r' && buffer[size - 1] == '\n')
// remove new-line signs from string at the end {
if (buffer[size - 2] == '\r' && buffer[size - 1] == '\n') size -= 2;
{ buffer[size] = 0;
size -= 2; }
buffer[size] = 0; else if (buffer[size - 1] == '\n')
} {
else if (buffer[size - 1] == '\n') --size;
{ buffer[size] = 0;
--size; }
buffer[size] = 0;
} isQuit = strcmp(buffer, "QUIT") == 0;
isQuit = strcmp(buffer, "quit") == 0;
if (strcmp(buffer, "SEND") == 0)
{
char sender[BUF], receiver[BUF], subject[81], message[BUF * 10];
printf("Sender: ");
fgets(sender, BUF - 1, stdin);
printf("Receiver: ");
fgets(receiver, BUF - 1, stdin);
printf("Subject: ");
fgets(subject, 80, stdin);
printf("Message: \n");
char line[BUF];
message[0] = '\0';
while (true)
{
fgets(line, BUF - 1, stdin);
if (strcmp(line, ".\n") == 0)
break;
strcat(message, line);
}
snprintf(buffer, sizeof(buffer), "SEND\n%s%s%s%s.\n", sender, receiver, subject, message);
}
else if (strcmp(buffer, "LIST") == 0)
{
char username[BUF];
printf("Username: ");
fgets(username, BUF - 1, stdin);
snprintf(buffer, sizeof(buffer), "LIST\n%s", username);
}
else if (strcmp(buffer, "READ") == 0)
{
char username[BUF], msgNum[10];
printf("Username: ");
fgets(username, BUF - 1, stdin);
printf("Message Number: ");
fgets(msgNum, 9, stdin);
snprintf(buffer, sizeof(buffer), "READ\n%s%s", username, msgNum);
}
else if (strcmp(buffer, "DEL") == 0)
{
char username[BUF], msgNum[10];
printf("Username: ");
fgets(username, BUF - 1, stdin);
printf("Message Number: ");
fgets(msgNum, 9, stdin);
snprintf(buffer, sizeof(buffer), "DEL\n%s%s", username, msgNum);
}
////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////
// SEND DATA // SEND DATA
// https://man7.org/linux/man-pages/man2/send.2.html // https://man7.org/linux/man-pages/man2/send.2.html
// send will fail if connection is closed, but does not set // send will fail if connection is closed, but does not set
// the error of send, but still the count of bytes sent // the error of send, but still the count of bytes sent
int size = strlen(buffer);
if ((send(create_socket, buffer, size + 1, 0)) == -1) if ((send(create_socket, buffer, size + 1, 0)) == -1)
{ {
// in case the server is gone offline we will still not enter // in case the server is gone offline we will still not enter