From cb86d3213519727a7fecd05b18b6a8adff230976 Mon Sep 17 00:00:00 2001
From: Syndamia <kamen@syndamia.com>
Date: Sat, 6 Jan 2024 11:15:57 +0200
Subject: (src) Moved source files to a src folder

---
 src/server-connection.c | 133 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 133 insertions(+)
 create mode 100644 src/server-connection.c

(limited to 'src/server-connection.c')

diff --git a/src/server-connection.c b/src/server-connection.c
new file mode 100644
index 0000000..285cc1d
--- /dev/null
+++ b/src/server-connection.c
@@ -0,0 +1,133 @@
+#include <server-connection.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#include <string.h>
+#include <util.h>
+
+sds constructFilePath(const sds root, const char* file);
+void sanitizeAddress(char* address);
+sds* findVhost(char* address, sds** vhosts, const int vhostsc);
+int openError(sds* filePath, int* fd, const sds* vhost, const char* client, const int fd_client);
+
+void on_connection(const char* client, const int fd_client, sds **vhosts, const int vhostsc) {
+	printf("[%s@%d] Connected successfully!\n", client, fd_client);
+
+	/* Get address request */
+	char address[256];
+	memset(address, 0, 256);
+
+	read(fd_client, address, 256);
+	sanitizeAddress(address);
+	printf("[%s@%d] Requested %s\n", client, fd_client, address);
+
+	/* Is the username connected with any file path? */
+	const sds *vhost = findVhost(address, vhosts, vhostsc);
+	if (vhost == NULL) {
+		fprintf(stderr, "[%s@%d] Unknown username in address %s\n", client, fd_client, address);
+		return;
+	}
+
+	/* Try to open the requested file or the error file */
+	sds filePath = constructFilePath(vhost[vh_path], strchr(address, '@') + 1);
+
+	int fd = 0;
+
+	/* Check if file is directory */
+	struct stat buf;
+	if (stat(filePath, &buf) == 0) {
+		if (S_ISDIR(buf.st_mode)) {
+			filePath = sdscat(filePath, "/index.md");
+		}
+		else if (!(S_ISREG(buf.st_mode))) {
+			fprintf(stderr, "[%s@%d] %s is not a regular file!\n", client, fd_client, filePath);
+
+			if (openError(&filePath, &fd, vhost, client, fd_client))
+				return;
+		}
+	}
+
+	if (fd <= 0)
+		fd = open(filePath, O_RDONLY);
+
+	if (fd < 0) {
+		fprintf(stderr, "[%s@%d] Error opening %s\n", client, fd_client, filePath);
+
+		if (openError(&filePath, &fd, vhost, client, fd_client))
+			return;
+	}
+
+	/* Send the file to the client */
+	printf("[%s@%d] Serving %s\n", client, fd_client, filePath);
+	sdsfree(filePath);
+
+	char buff[256];
+	memset(buff, 0, sizeof(buff));
+	while (read(fd, buff, 256)) {
+		write(fd_client, buff, strlen(buff));
+		memset(buff, 0, sizeof(buff));
+	}
+
+	/* Finalize */
+	close(fd);
+	printf("[%s@%d] Served!\n", client, fd_client);
+}
+
+sds constructFilePath(const sds root, const char* file) {
+	sds path = sdsdup(root);
+	if (root[sdslen(root)-1] != '/' && file[0] != '/')
+		path = sdscat(path, "/");
+	path = sdscat(path, file);
+	if (file[strlen(file)-1] == '/')
+		path = sdscat(path, "index.md");
+	return path;
+}
+
+void sanitizeAddress(char* address) {
+	/* Remove host and port */
+	char* startPath = strchr(address, '/');
+	if (startPath == NULL)
+		startPath = strchr(address, '\0');
+
+	char* startHost = strchr(address, '@');
+	shiftLeft(startHost + 1, address - startHost, startPath - startHost - 1);
+
+	/* Remove ../ */
+	for (char* prev = startHost+1, *i = startHost+1; i != NULL && *i != '\0';) {
+		if (i[1] == '.' && i[2] == '.' && i[3] == '/') {
+			shiftLeft(prev, strlen(prev), i - prev + 3);
+			i = prev;
+		}
+		else {
+			prev = i;
+			i = strchr(i+1, '/');
+		}
+	}
+}
+
+sds* findVhost(char* address, sds** vhosts, const int vhostsc) {
+	sds* vhost = NULL;
+	int usernameLen = strchr(address, '@') - address;
+	for (int i = 0; i < vhostsc; i++) {
+		if (strncmp(vhosts[i][vh_user], address, usernameLen) == 0) {
+			vhost = *vhosts + i;
+			break;
+		}
+	}
+	return vhost;
+}
+
+int openError(sds* filePath, int* fd, const sds* vhost, const char* client, const int fd_client) {
+	sdsfree(*filePath);
+	*filePath = constructFilePath(vhost[vh_path], vhost[vh_error]);
+	*fd = open(*filePath, O_RDONLY);
+	if (*fd < 0) {
+		fprintf(stderr, "[%s@%d] Error opening %s\n", client, fd_client, *filePath);
+		sdsfree(*filePath);
+		return 1;
+	}
+	return 0;
+}
-- 
cgit v1.2.3