From 7f1d6bbc335288df1e24e7c8f305c32afe6b050a Mon Sep 17 00:00:00 2001
From: cflip <cflip@cflip.net>
Date: Mon, 8 May 2023 21:25:21 -0600
Subject: Begin rewriting cfws in C

---
 cfws.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 cfws.c

(limited to 'cfws.c')

diff --git a/cfws.c b/cfws.c
new file mode 100644
index 0000000..bc9d0fa
--- /dev/null
+++ b/cfws.c
@@ -0,0 +1,102 @@
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "http.h"
+
+#define CFWS_MAXCONN 10   /* Max connections allowed by listen(). */
+#define CFWS_MAXREAD 1024 /* Size of buffer used for reading from client. */
+
+#define CFWS_DEFAULT_PORT 8080
+
+int  initialize_server(int);
+void handle_connection();
+
+int main(int argc, char *argv[])
+{
+	int port = CFWS_DEFAULT_PORT;
+	int serverfd, clientfd;
+
+	serverfd = initialize_server(port);
+	if (serverfd == -1)
+		return 1;
+
+	printf("Serving a directory at localhost:%d\n", port);
+
+	while (1) {
+		clientfd = accept(serverfd, NULL, NULL);
+		handle_connection(clientfd);
+		close(clientfd);
+	}
+
+	close(serverfd);
+	return 0;
+}
+
+int initialize_server(int port)
+{
+	struct sockaddr_in addr;
+	int rc;
+	int sockopts = 1;
+	int sockfd;
+
+	sockfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sockfd == -1) {
+		perror("Failed to create server socket");
+		return -1;
+	}
+
+	/* Allow the port to be reused, prevents errors when quickly starting
+	 * and restarting the server. */
+	/* TODO: Also use SO_REUSEPORT? */
+	setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &sockopts, sizeof(int));
+
+	memset(&addr, 0, sizeof(struct sockaddr_in));
+	addr.sin_family      = AF_INET;
+	addr.sin_addr.s_addr = htonl(INADDR_ANY);
+	addr.sin_port        = htons(port);
+
+	rc = bind(sockfd, (struct sockaddr*)&addr, sizeof(struct sockaddr));
+	if (rc == -1) {
+		perror("Failed to bind server socket");
+		return -1;
+	}
+
+	rc = listen(sockfd, CFWS_MAXCONN);
+	if (rc == -1) {
+		perror("Failed to listen on server socket");
+		return -1;
+	}
+
+	return sockfd;
+}
+
+void handle_connection(int connfd)
+{
+	char msgbuf[128];
+	char *resbuf;
+	char readbuf[CFWS_MAXREAD];
+	struct http_request req;
+
+	memset(readbuf, 0, CFWS_MAXREAD);
+	read(connfd, readbuf, CFWS_MAXREAD - 1);
+
+	req = http_parse_request(readbuf);
+
+	snprintf(msgbuf, 128, "Welcome to %s", req.uri);
+
+	http_build_response(&resbuf, HTTP_RESPONSE_OK, msgbuf);
+	write(connfd, resbuf, strlen(resbuf));
+
+	free(resbuf);
+	http_free_request(&req);
+}
+
-- 
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