| /* |
| This file is part of libmicrohttpd |
| Copyright (C) 2007 Christian Grothoff (and other contributing authors) |
| Copyright (C) 2016-2022 Evgeny Grin (Karlson2k) |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| /** |
| * @file fileserver_example.c |
| * @brief minimal example for how to use libmicrohttpd to serve files |
| * @author Christian Grothoff |
| * @author Karlson2k (Evgeny Grin) |
| */ |
| |
| #include "platform.h" |
| #include <microhttpd.h> |
| #ifdef HAVE_UNISTD_H |
| #include <unistd.h> |
| #endif /* HAVE_UNISTD_H */ |
| #ifdef HAVE_SYS_STAT_H |
| #include <sys/stat.h> |
| #endif /* HAVE_SYS_STAT_H */ |
| #ifdef HAVE_FCNTL_H |
| #include <fcntl.h> |
| #endif /* HAVE_FCNTL_H */ |
| |
| #define PAGE \ |
| "<html><head><title>File not found</title></head><body>File not found</body></html>" |
| |
| #ifndef S_ISREG |
| #define S_ISREG(x) (S_IFREG == (x & S_IFREG)) |
| #endif /* S_ISREG */ |
| |
| static enum MHD_Result |
| ahc_echo (void *cls, |
| struct MHD_Connection *connection, |
| const char *url, |
| const char *method, |
| const char *version, |
| const char *upload_data, |
| size_t *upload_data_size, void **req_cls) |
| { |
| static int aptr; |
| struct MHD_Response *response; |
| enum MHD_Result ret; |
| int fd; |
| struct stat buf; |
| (void) cls; /* Unused. Silent compiler warning. */ |
| (void) version; /* Unused. Silent compiler warning. */ |
| (void) upload_data; /* Unused. Silent compiler warning. */ |
| (void) upload_data_size; /* Unused. Silent compiler warning. */ |
| |
| if ( (0 != strcmp (method, MHD_HTTP_METHOD_GET)) && |
| (0 != strcmp (method, MHD_HTTP_METHOD_HEAD)) ) |
| return MHD_NO; /* unexpected method */ |
| if (&aptr != *req_cls) |
| { |
| /* do never respond on first call */ |
| *req_cls = &aptr; |
| return MHD_YES; |
| } |
| *req_cls = NULL; /* reset when done */ |
| /* WARNING: direct usage of url as filename is for example only! |
| * NEVER pass received data directly as parameter to file manipulation |
| * functions. Always check validity of data before using. |
| */ |
| if (NULL != strstr (url, "../")) /* Very simplified check! */ |
| fd = -1; /* Do not allow usage of parent directories. */ |
| else |
| fd = open (url + 1, O_RDONLY); |
| if (-1 != fd) |
| { |
| if ( (0 != fstat (fd, &buf)) || |
| (! S_ISREG (buf.st_mode)) ) |
| { |
| /* not a regular file, refuse to serve */ |
| if (0 != close (fd)) |
| abort (); |
| fd = -1; |
| } |
| } |
| if (-1 == fd) |
| { |
| response = MHD_create_response_from_buffer_static (strlen (PAGE), |
| PAGE); |
| ret = MHD_queue_response (connection, MHD_HTTP_NOT_FOUND, response); |
| MHD_destroy_response (response); |
| } |
| else |
| { |
| response = MHD_create_response_from_fd64 ((uint64_t) buf.st_size, fd); |
| if (NULL == response) |
| { |
| if (0 != close (fd)) |
| abort (); |
| return MHD_NO; |
| } |
| ret = MHD_queue_response (connection, MHD_HTTP_OK, response); |
| MHD_destroy_response (response); |
| } |
| return ret; |
| } |
| |
| |
| int |
| main (int argc, char *const *argv) |
| { |
| struct MHD_Daemon *d; |
| int port; |
| |
| if (argc != 2) |
| { |
| printf ("%s PORT\n", argv[0]); |
| return 1; |
| } |
| port = atoi (argv[1]); |
| if ( (1 > port) || (port > 65535) ) |
| { |
| fprintf (stderr, |
| "Port must be a number between 1 and 65535.\n"); |
| return 1; |
| } |
| |
| d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION |
| | MHD_USE_INTERNAL_POLLING_THREAD | MHD_USE_ERROR_LOG, |
| (uint16_t) port, |
| NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END); |
| if (d == NULL) |
| return 1; |
| (void) getc (stdin); |
| MHD_stop_daemon (d); |
| return 0; |
| } |
