From 0a3dc4a56a3583f1696d8b2b425fa23bbeb71793 Mon Sep 17 00:00:00 2001
From: 08draven <eggseggsarecool+git@gmail.com>
Date: Wed, 20 Nov 2024 00:31:34 -0500
Subject: [PATCH] init

---
 .gitignore |   2 +
 Makefile   |   2 +
 src/http.c | 152 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 156 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 src/http.c

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..41783a5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/serv
+/vgcore.*
\ No newline at end of file
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f6b8c90
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,2 @@
+make:
+	gcc ./src/*.c -O3 -o ./serv
\ No newline at end of file
diff --git a/src/http.c b/src/http.c
new file mode 100644
index 0000000..b1f34d0
--- /dev/null
+++ b/src/http.c
@@ -0,0 +1,152 @@
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <stddef.h>
+
+#define MAX_MSG 1024*1024*16
+#define LISTEN_BACKLOG 50
+#define THREADS 8 
+#define MAX_HEADERS 1024
+
+struct header {
+	char *key;
+	char *value;
+};
+
+struct header_list {
+	size_t header_count;
+	struct header *header_data;
+	size_t storage_count;
+	char *storage_data;
+};
+
+void handle_error(char *msg) {                                                                         
+	perror(msg);                                                               
+	exit(EXIT_FAILURE);                                                        
+}
+
+struct header_list push_header(struct header_list headers, char *key, char *value) {
+	if (headers.header_count >= MAX_HEADERS - 1) return headers;
+
+	int len = headers.storage_count + 1;
+	snprintf(&headers.storage_data[len],MAX_MSG - len,"%s",key);
+	len += strlen(key) + 1;
+	snprintf(&headers.storage_data[len],MAX_MSG - len,"%s",value);
+	len += strlen(value) + 1;
+	headers.storage_count = len;
+
+	struct header new_header;
+	new_header.value = &headers.storage_data[len - strlen(value) - 1];
+	new_header.key = &headers.storage_data[len - strlen(value) - strlen(key) - 2];
+	headers.header_data[headers.header_count] = new_header;
+	headers.header_count++;
+
+	return headers;
+}
+
+char *parse_header(char *tmp, char *msg, struct header_list headers) {
+	for (int i = 0; i < headers.header_count; i++) {
+		struct header dat = headers.header_data[i];
+		snprintf(tmp,MAX_MSG,"%s\n%s: %s",msg,dat.key,dat.value);
+		memcpy(msg,tmp,MAX_MSG);
+	}
+	return tmp;
+}
+
+void* use_sock(void* cfd2) {
+	printf("%s\n","Request is being sent");
+	int cfd = (int) cfd2;
+
+	char *msg = malloc(MAX_MSG);
+	char *tmp = malloc(MAX_MSG);
+	char *num = malloc(MAX_MSG);
+	char *html = "Balls man is cool";
+
+	struct header_list headers;
+	headers.header_count = 0;
+	headers.storage_count = 0;	
+
+	headers.header_data = calloc(MAX_HEADERS, sizeof(struct header));
+	headers.storage_data = malloc(MAX_MSG);
+
+	memset(headers.storage_data,0,MAX_MSG);
+
+	tmp[0] = '\0';
+
+	headers = push_header(headers,"Content-Type","text/html");
+	snprintf(num,MAX_MSG,"%d",strlen(html));
+	headers = push_header(headers,"Content-Length",num);
+
+	parse_header(tmp, msg, headers);
+
+	snprintf(msg, MAX_MSG, "HTTP/1.1 200 OK%s\n\n%s", tmp, html);
+
+	printf("%s\n",msg);
+
+	send(cfd,msg,strlen(msg),0);
+	close(cfd);
+
+	free(msg);
+	free(tmp);
+	free(num);
+
+	return (void*) 1;
+}
+
+// credit to the man docs
+int main(int argc, char *argv[]) {
+	int sfd, cfd, thread_num;
+	struct sockaddr_in my_addr, peer_addr;
+	socklen_t peer_addr_size;
+	pthread_t* thread_list;
+
+	sfd = socket(AF_INET, SOCK_STREAM, 0);
+	if (sfd == -1)
+		handle_error("socket");
+
+	memset(&my_addr, 0, sizeof(struct sockaddr_in));
+
+	my_addr.sin_family = AF_INET;
+	my_addr.sin_port = htons(8000);
+	my_addr.sin_addr.s_addr = htonl(0x7F000001);
+
+	if (bind(sfd, (struct sockaddr *)&my_addr, sizeof(struct sockaddr_in)) == -1)
+		handle_error("bind");
+
+	if (listen(sfd, LISTEN_BACKLOG) == -1)
+		handle_error("listen");
+
+	peer_addr_size = sizeof(struct sockaddr_in);
+
+	thread_list = calloc(THREADS,sizeof(pthread_t));
+
+	for (size_t i = 0; i < THREADS; i++) {
+		thread_list[i] = -1;
+	}
+
+	thread_num = 0;
+
+	for (;;) {
+		cfd = accept(sfd, (struct sockaddr *)&peer_addr, &peer_addr_size);
+
+		if (cfd == -1)
+			handle_error("accept");
+
+		if (thread_list[thread_num] != -1) {
+			pthread_join(thread_list[thread_num],NULL);
+
+			thread_list[thread_num] = -1;
+		}
+
+		pthread_create(&thread_list[thread_num],NULL,use_sock,(void*)cfd);
+
+		thread_num = (thread_num + 1) % THREADS;
+
+	}
+
+	free(thread_list);
+}