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basic web server

This commit is contained in:
Win 2024-05-15 14:52:38 +07:00
parent cc7e576a07
commit 068a6e2e70
4 changed files with 56 additions and 25 deletions
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9
goofy.c Normal file
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@ -0,0 +1,9 @@
#include <stdio.h>
char *p;
int l = 65;
char *p = (char *) &l;
int q = *(int **) &p = &l;

BIN
structs
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23
structs.c
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@ -1,23 +0,0 @@
// playing around with structs
// win 2024
#include <stdio.h>
struct abc {
int x;
int y;
int z;
};
int main() {
struct abc a = {0, 1, 2};
struct abc *ptr = &a;
printf("Address of struct a: %p\n", ptr);
printf("Address of x in struct a: %p\n", &a.x);
printf("Address of y in struct a: %p\n", &a.y);
printf("Address of z in struct a: %p:\n", &a.z);
return 0;
}

45
webserver.c
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@ -1,11 +1,21 @@
#include <arpa/inet.h> #include <arpa/inet.h>
#include <errno.h> #include <errno.h>
#include <stdio.h> #include <stdio.h>
#include <string.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <unistd.h>
#define PORT 8080 #define PORT 8080
#define BUFFER_SIZE 1024
int main() { int main() {
char buffer[BUFFER_SIZE];
char resp[] = "HTTP/1.0 200\r\n"
"Server: webserver-c\r\n"
"Content-type: text/html\r\n\r\n"
"<html>hello, world</html>\r\n";
// create a socket
int sockfd = socket(AF_INET, SOCK_STREAM, 0); int sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd == -1) { if (sockfd == -1) {
perror("webserve (socket)"); perror("webserve (socket)");
@ -13,6 +23,7 @@ int main() {
} }
printf("socket created successfully\n"); printf("socket created successfully\n");
// create the address to bind the socket to
struct sockaddr_in host_addr; struct sockaddr_in host_addr;
int host_addrlen = sizeof(host_addr); int host_addrlen = sizeof(host_addr);
@ -20,11 +31,45 @@ int main() {
host_addr.sin_port = htons(PORT); host_addr.sin_port = htons(PORT);
host_addr.sin_addr.s_addr = htonl(INADDR_ANY); host_addr.sin_addr.s_addr = htonl(INADDR_ANY);
// Bind the socket to the address
if (bind(sockfd, (struct sockaddr *)&host_addr, host_addrlen) != 0) { if (bind(sockfd, (struct sockaddr *)&host_addr, host_addrlen) != 0) {
perror("webserver (bind)"); perror("webserver (bind)");
return 1; return 1;
} }
printf("socket successfully bound to address\n"); printf("socket successfully bound to address\n");
// listen to incoming connections
if (listen(sockfd, SOMAXCONN) != 0) {
perror("webserver (listen)");
return 1;
}
printf("server listening for connections\n");
for (;;) {
// accept incoming connections
int newsockfd = accept(sockfd, (struct sockaddr *)&host_addr, (socklen_t *)&host_addrlen);
if (newsockfd < 0) {
perror("webserver (accept)");
continue;
}
printf("connection accepted\n");
// read from the socket
int valread = read(newsockfd, buffer, BUFFER_SIZE);
if (valread < 0) {
perror("webserver (read)");
continue;
}
// write to the socket
int valwrite = write(newsockfd, resp, strlen(resp));
if (valwrite < 0) {
perror("webserver (write)");
continue;
}
close(newsockfd);
}
return 0; return 0;
} }