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linux version yippee

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ari melody 2024-02-29 00:13:37 +00:00
parent 37f4a98791
commit 71fff37a40
4 changed files with 322 additions and 179 deletions
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12
README.md
View file

@ -2,11 +2,19 @@
an awesome web server that meows at you
## okay some more detail
i built this in c using `winsock2`. why? because i wanted to learn sockets! and my windows machine was the closest subject at the time.
i originally built this in c using `winsock2`. why? because i wanted to learn sockets! and my windows machine was the closest subject at the time. now this runs the regular linux socket API by default (i left the old windows-specific code in `src/windows.c` if you want to use that!)
**Q:** is it very good? **A:** no! but i had fun making it, so idrc
a fun little foire into getting even more familiar with how web services work. how fun!!
### building
oh yeah you can compile this with `gcc` and a little `gcc -o ./meow.exe ./src/main.c -lws2_32`. i might make this work for mac/linux at some point if i somehow get even more bored :]
oh yeah you can compile this with `gcc` and a little
```sh
# linux/macos (untested on macos)
gcc -o ./meow ./src/main.c
```
```powershell
# windows
gcc -o ./meow.exe ./src/windows.c -lws2_32
```

119
src/main.c
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@ -1,7 +1,12 @@
#include <stdio.h>
#include <stdint.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#define BUFFER_SIZE (1024 * 1024)
@ -12,70 +17,41 @@ int main() {
printf("hello world!~\n");
int result = 0;
WSADATA wsaData = {0};
struct sockaddr_in service;
const char* address = "127.0.0.1";
const char* address = "0.0.0.0";
int port = 8080;
result = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (result != 0) {
printf("WSAStartup failed: %d\n", result);
int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock == -1) {
fprintf(stderr, "failed to create socket: %s\n", strerror(errno));
return 1;
}
SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_SOCKET) {
printf("failed to create socket! (%d)\n", WSAGetLastError());
WSACleanup();
return 1;
}
printf("socket created successfully!\n");
service.sin_family = AF_INET;
service.sin_addr.s_addr = inet_addr(address);
service.sin_port = htons(port);
if (bind(sock, (SOCKADDR*) &service, sizeof(service)) == SOCKET_ERROR) {
closesocket(sock);
printf("failed to bind to %s:%d: %ld\n", address, port, WSAGetLastError());
WSACleanup();
struct in_addr in_address;
inet_aton(address, &in_address);
struct sockaddr_in service = {AF_INET, htons(port), in_address};
if (bind(sock, (struct sockaddr*) &service, sizeof(struct sockaddr_in)) == -1) {
close(sock);
fprintf(stderr, "failed to bind to %s:%d: %s\n", address, port, strerror(errno));
return 1;
}
/*
result = connect(sock, (SOCKADDR*) &service, sizeof(client_service));
if (result == SOCKET_ERROR) {
closesocket(sock);
printf("unable to connect to the server: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
}
*/
if (listen(sock, 1) == SOCKET_ERROR) {
closesocket(sock);
printf("failed to bind to %s:%d: %ld\n", address, port, WSAGetLastError());
WSACleanup();
if (listen(sock, 1) == -1) {
close(sock);
fprintf(stderr, "failed to bind to %s:%d: %s\n", address, port, strerror(errno));
return 1;
}
/*
char address[INET_ADDRSTRLEN];
InetNtop(AF_INET, &(service.sin_addr.s_addr), address, INET_ADDRSTRLEN);
ntohs(service.sin_port)
*/
printf("now listening on %s:%d!\n", address, port);
char running = 1;
do {
SOCKET accept_sock = accept(sock, NULL, NULL);
if (accept_sock == INVALID_SOCKET) {
closesocket(sock);
printf("failed to accept socket connection: %ld\n", WSAGetLastError());
WSACleanup();
int accept_sock = accept(sock, NULL, NULL);
if (accept_sock == -1) {
close(sock);
fprintf(stderr, "failed to accept socket connection: %s\n", strerror(errno));
return 1;
} else {
printf("client connected!\n");
@ -86,7 +62,6 @@ int main() {
do {
received = recv(accept_sock, recvbuf, 512, 0);
char end[] = "\r\n\r\n";
char lastfour[4];
if (received > 0) {
printf("bytes received: %d\n", received);
@ -96,26 +71,22 @@ int main() {
if (recvbuf[i] == '\n') {
printf("< ");
}
for (int i = 0; i < 3; i++) {
lastfour[i] = lastfour[i + 1];
}
lastfour[3] = recvbuf[i];
}
char matches = 1;
for (int i = 0; i < 4; i++) {
if (lastfour[i] != end[i]) {
matches = 0;
break;
}
}
if (matches) break;
if (received >= 4) {
char matches = 1;
for (int i = 0; i < 4; i++) {
if (recvbuf[received - 4 + i] != end[i]) {
matches = 0;
break;
}
}
if (matches) break;
}
} else if (received == 0) {
printf("connection closed.\n");
} else {
printf("recv failed: %d\n", WSAGetLastError());
printf("recv failed: %s\n", strerror(errno));
}
} while (received > 0);
@ -127,20 +98,18 @@ int main() {
free(response);
result = closesocket(accept_sock);
if (result == SOCKET_ERROR) {
printf("failed to close socket properly: %d\n", WSAGetLastError());
closesocket(sock);
WSACleanup();
result = close(accept_sock);
if (result == -1) {
fprintf(stderr, "failed to close socket properly: %s\n", strerror(errno));
close(sock);
return 1;
}
} while (running);
// close responsibly! <3
result = closesocket(sock);
if (result == SOCKET_ERROR) {
printf("failed to close socket properly: %d\n", WSAGetLastError());
WSACleanup();
result = close(sock);
if (result == -1) {
fprintf(stderr, "failed to close socket properly: %s\n", strerror(errno));
return 1;
}
@ -154,9 +123,9 @@ void simple_http_ok(char *response, size_t *response_len) {
snprintf(header, BUFFER_SIZE,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain; charset=utf-8\r\n"
"Content-Length: 9\r\n"
"Content-Length: 10\r\n"
"\r\n"
"meow 😺");
"meow 😺\n");
*response_len = 0;
memcpy(response, header, strlen(header));

166
src/windows.c Normal file
View file

@ -0,0 +1,166 @@
#include <stdio.h>
#include <stdint.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#define BUFFER_SIZE (1024 * 1024)
void simple_http_ok(char *response, size_t *response_len);
int main() {
printf("hello world!~\n");
int result = 0;
WSADATA wsaData = {0};
struct sockaddr_in service;
const char* address = "127.0.0.1";
int port = 8080;
result = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (result != 0) {
printf("WSAStartup failed: %d\n", result);
return 1;
}
SOCKET sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sock == INVALID_SOCKET) {
printf("failed to create socket! (%d)\n", WSAGetLastError());
WSACleanup();
return 1;
}
printf("socket created successfully!\n");
service.sin_family = AF_INET;
service.sin_addr.s_addr = inet_addr(address);
service.sin_port = htons(port);
if (bind(sock, (SOCKADDR*) &service, sizeof(service)) == SOCKET_ERROR) {
closesocket(sock);
printf("failed to bind to %s:%d: %ld\n", address, port, WSAGetLastError());
WSACleanup();
return 1;
}
/*
result = connect(sock, (SOCKADDR*) &service, sizeof(client_service));
if (result == SOCKET_ERROR) {
closesocket(sock);
printf("unable to connect to the server: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
}
*/
if (listen(sock, 1) == SOCKET_ERROR) {
closesocket(sock);
printf("failed to bind to %s:%d: %ld\n", address, port, WSAGetLastError());
WSACleanup();
return 1;
}
/*
char address[INET_ADDRSTRLEN];
InetNtop(AF_INET, &(service.sin_addr.s_addr), address, INET_ADDRSTRLEN);
ntohs(service.sin_port)
*/
printf("now listening on %s:%d!\n", address, port);
char running = 1;
do {
SOCKET accept_sock = accept(sock, NULL, NULL);
if (accept_sock == INVALID_SOCKET) {
closesocket(sock);
printf("failed to accept socket connection: %ld\n", WSAGetLastError());
WSACleanup();
return 1;
} else {
printf("client connected!\n");
}
char recvbuf[512];
int received = 0;
do {
received = recv(accept_sock, recvbuf, 512, 0);
char end[] = "\r\n\r\n";
char lastfour[4];
if (received > 0) {
printf("bytes received: %d\n", received);
printf("< ");
for (int i = 0; i < received; i++) {
printf("%c", recvbuf[i]);
if (recvbuf[i] == '\n') {
printf("< ");
}
for (int i = 0; i < 3; i++) {
lastfour[i] = lastfour[i + 1];
}
lastfour[3] = recvbuf[i];
}
char matches = 1;
for (int i = 0; i < 4; i++) {
if (lastfour[i] != end[i]) {
matches = 0;
break;
}
}
if (matches) break;
} else if (received == 0) {
printf("connection closed.\n");
} else {
printf("recv failed: %d\n", WSAGetLastError());
}
} while (received > 0);
char *response = (char *)malloc(BUFFER_SIZE * 2 * sizeof(char));
size_t response_len;
simple_http_ok(response, &response_len);
send(accept_sock, response, response_len, 0);
free(response);
result = closesocket(accept_sock);
if (result == SOCKET_ERROR) {
printf("failed to close socket properly: %d\n", WSAGetLastError());
closesocket(sock);
WSACleanup();
return 1;
}
} while (running);
// close responsibly! <3
result = closesocket(sock);
if (result == SOCKET_ERROR) {
printf("failed to close socket properly: %d\n", WSAGetLastError());
WSACleanup();
return 1;
}
return 0;
}
void simple_http_ok(char *response, size_t *response_len) {
// build header
char *header = (char *)malloc(BUFFER_SIZE * sizeof(char));
snprintf(header, BUFFER_SIZE,
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/plain; charset=utf-8\r\n"
"Content-Length: 9\r\n"
"\r\n"
"meow 😺");
*response_len = 0;
memcpy(response, header, strlen(header));
*response_len += strlen(header);
free(header);
}