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#include "../beaker.h"
#include "beaker_globals.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
void set_handler(const char *path, RequestHandler handler) {
if (handler_count < MAX_HANDLERS) {
strncpy(handlers[handler_count].path, path, MAX_PATH_LEN - 1);
handlers[handler_count].path[MAX_PATH_LEN - 1] = '\0';
handlers[handler_count].handler = handler;
handler_count++;
} else {
fprintf(stderr,
"[WARNING] set_handler: Maximum number of handlers reached. Cannot register handler for '%s'.\n",
path);
}
}
char *parse_request_url(const char *request_line, UrlParams *params) {
char method[16];
char path_with_query_buffer[MAX_PATH_LEN];
char http_version[16];
if (sscanf(request_line, "%15s %255s %15s", method, path_with_query_buffer,
http_version) != 3) {
fprintf(stderr, "[ERROR] parse_request_url: Malformed request line: '%s'\n",
request_line);
return NULL;
}
params->count = 0;
char *working_url_copy = strdup(path_with_query_buffer);
if (working_url_copy == NULL) {
perror("Failed to allocate memory for working URL copy");
return NULL;
}
char *query_start = strchr(working_url_copy, '?');
char *path_only_for_return;
if (query_start != NULL) {
*query_start = '\0';
path_only_for_return = working_url_copy;
char *query_string = query_start + 1;
char *token;
char *saveptr_query;
token = strtok_r(query_string, "&", &saveptr_query);
while (token != NULL && params->count < MAX_URL_PARAMS) {
char *equals_sign = strchr(token, '=');
if (equals_sign != NULL) {
size_t key_len = equals_sign - token;
strncpy(params->params[params->count].key, token, key_len);
params->params[params->count].key[key_len] = '\0';
strncpy(params->params[params->count].value, equals_sign + 1,
MAX_VALUE_LEN - 1);
params->params[params->count].value[MAX_VALUE_LEN - 1] = '\0';
params->count++;
}
token = strtok_r(NULL, "&", &saveptr_query);
}
} else {
path_only_for_return = working_url_copy;
}
char *final_requested_path = strdup(path_only_for_return);
if (final_requested_path == NULL) {
perror("Failed to allocate final requested path");
free(working_url_copy);
return NULL;
}
char *segment;
int segment_index = 0;
char *saveptr_path;
segment = strtok_r(working_url_copy, "/", &saveptr_path);
while (segment != NULL) {
if (segment_index > 0) {
if (params->count < MAX_URL_PARAMS) {
char param_key[MAX_KEY_LEN];
snprintf(param_key, sizeof(param_key), "param%d", segment_index - 1);
strncpy(params->params[params->count].key, param_key, MAX_KEY_LEN - 1);
params->params[params->count].key[MAX_KEY_LEN - 1] = '\0';
strncpy(params->params[params->count].value, segment,
MAX_VALUE_LEN - 1);
params->params[params->count].value[MAX_VALUE_LEN - 1] = '\0';
params->count++;
} else {
fprintf(stderr,
"[WARNING] parse_request_url: Max URL parameters reached. Skipping path segment '%s'.\n",
segment);
}
}
segment_index++;
segment = strtok_r(NULL, "/", &saveptr_path);
}
free(working_url_copy);
return final_requested_path;
}
const char *get_mime_type(const char *file_path) {
const char *ext = strrchr(file_path, '.');
if (!ext) {
return "application/octet-stream";
}
ext++;
if (strcmp(ext, "html") == 0 || strcmp(ext, "htm") == 0)
return "text/html";
if (strcmp(ext, "css") == 0)
return "text/css";
if (strcmp(ext, "js") == 0)
return "application/javascript";
if (strcmp(ext, "json") == 0)
return "application/json";
if (strcmp(ext, "jpg") == 0 || strcmp(ext, "jpeg") == 0)
return "image/jpeg";
if (strcmp(ext, "png") == 0)
return "image/png";
if (strcmp(ext, "gif") == 0)
return "image/gif";
if (strcmp(ext, "ico") == 0)
return "image/x-icon";
if (strcmp(ext, "svg") == 0)
return "image/svg+xml";
if (strcmp(ext, "pdf") == 0)
return "application/pdf";
if (strcmp(ext, "txt") == 0)
return "text/plain";
return "application/octet-stream";
}
bool serve_static_file(const char *request_path_relative_to_static) {
char full_static_path[MAX_PATH_LEN];
if (strstr(request_path_relative_to_static, "..") != NULL) {
fprintf(stderr, "[SECURITY] Attempted directory traversal: %s\n",
request_path_relative_to_static);
const char *forbidden_response =
"HTTP/1.1 403 Forbidden\r\nContent-Length: 0\r\n\r\n";
send(current_client_socket, forbidden_response, strlen(forbidden_response), 0);
return true;
}
snprintf(full_static_path, sizeof(full_static_path), "%s%s", STATIC_DIR,
request_path_relative_to_static);
FILE *fp = fopen(full_static_path, "rb");
if (fp == NULL) {
fprintf(stderr,
"[ERROR] serve_static_file: File '%s' not found or could not be opened. %s\n",
full_static_path, strerror(errno));
return false;
}
struct stat st;
if (fstat(fileno(fp), &st) < 0) {
perror("fstat error");
fprintf(stderr, "[ERROR] serve_static_file: fstat failed for '%s'.\n",
full_static_path);
fclose(fp);
const char *server_error_response =
"HTTP/1.1 500 Internal Server Error\r\nContent-Length: 0\r\n\r\n";
send(current_client_socket, server_error_response, strlen(server_error_response), 0);
return true;
}
long file_size = st.st_size;
const char *mime_type = get_mime_type(full_static_path);
char http_header[BUFFER_SIZE];
snprintf(http_header, sizeof(http_header),
"HTTP/1.1 200 OK\r\n"
"Content-Type: %s\r\n"
"Content-Length: %ld\r\n"
"Connection: close\r\n"
"\r\n",
mime_type, file_size);
if (send(current_client_socket, http_header, strlen(http_header), 0) < 0) {
perror("Error sending static file header");
fprintf(stderr, "[ERROR] serve_static_file: Failed to send header for '%s'.\n", full_static_path);
fclose(fp);
return true;
}
char file_buffer[BUFFER_SIZE];
size_t bytes_read;
while ((bytes_read = fread(file_buffer, 1, sizeof(file_buffer), fp)) > 0) {
if (send(current_client_socket, file_buffer, bytes_read, 0) < 0) {
perror("Error sending static file content");
fprintf(stderr, "[ERROR] serve_static_file: Failed to send content for '%s'.\n", full_static_path);
break;
}
}
fclose(fp);
return true;
}
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