| /* |
| This file is part of libmicrohttpd |
| Copyright (C) 2007, 2008 Christian Grothoff (and other contributing authors) |
| Copyright (C) 2014-2022 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_external_select.c |
| * @brief minimal example for how to use libmicrohttpd to server files |
| * @author Christian Grothoff |
| * @author Karlson2k (Evgeny Grin) |
| */ |
| |
| #include "platform.h" |
| #include <microhttpd.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| |
| #define PAGE \ |
| "<html><head><title>File not found</title></head><body>File not found</body></html>" |
| |
| static ssize_t |
| file_reader (void *cls, uint64_t pos, char *buf, size_t max) |
| { |
| FILE *file = (FILE *) cls; |
| size_t bytes_read; |
| |
| /* 'fseek' may not support files larger 2GiB, depending on platform. |
| * For production code, make sure that 'pos' has valid values, supported by |
| * 'fseek', or use 'fseeko' or similar function. */ |
| if (0 != fseek (file, (long) pos, SEEK_SET)) |
| return MHD_CONTENT_READER_END_WITH_ERROR; |
| bytes_read = fread (buf, 1, max, file); |
| if (0 == bytes_read) |
| return (0 != ferror (file)) ? MHD_CONTENT_READER_END_WITH_ERROR : |
| MHD_CONTENT_READER_END_OF_STREAM; |
| return (ssize_t) bytes_read; |
| } |
| |
| |
| static void |
| free_callback (void *cls) |
| { |
| FILE *file = cls; |
| fclose (file); |
| } |
| |
| |
| 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; |
| FILE *file; |
| 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)) |
| 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 */ |
| |
| file = fopen (&url[1], "rb"); |
| if (NULL != file) |
| { |
| fd = fileno (file); |
| if (-1 == fd) |
| { |
| (void) fclose (file); |
| return MHD_NO; /* internal error */ |
| } |
| if ( (0 != fstat (fd, &buf)) || |
| (! S_ISREG (buf.st_mode)) ) |
| { |
| /* not a regular file, refuse to serve */ |
| fclose (file); |
| file = NULL; |
| } |
| } |
| |
| if (NULL == file) |
| { |
| 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_callback ((size_t) buf.st_size, |
| 32 * 1024, /* 32k page size */ |
| &file_reader, |
| file, |
| &free_callback); |
| if (NULL == response) |
| { |
| fclose (file); |
| 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; |
| time_t end; |
| time_t t; |
| struct timeval tv; |
| fd_set rs; |
| fd_set ws; |
| fd_set es; |
| MHD_socket max; |
| uint64_t mhd_timeout; |
| int port; |
| |
| if (argc != 3) |
| { |
| printf ("%s PORT SECONDS-TO-RUN\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_ERROR_LOG, |
| (uint16_t) port, |
| NULL, NULL, &ahc_echo, NULL, MHD_OPTION_END); |
| if (d == NULL) |
| return 1; |
| end = time (NULL) + atoi (argv[2]); |
| while ((t = time (NULL)) < end) |
| { |
| #if ! defined(_WIN32) || defined(__CYGWIN__) |
| tv.tv_sec = end - t; |
| #else /* Native W32 */ |
| tv.tv_sec = (long) (end - t); |
| #endif /* Native W32 */ |
| tv.tv_usec = 0; |
| max = 0; |
| FD_ZERO (&rs); |
| FD_ZERO (&ws); |
| FD_ZERO (&es); |
| if (MHD_YES != MHD_get_fdset (d, &rs, &ws, &es, &max)) |
| break; /* fatal internal error */ |
| if (MHD_get_timeout64 (d, &mhd_timeout) == MHD_YES) |
| { |
| if (((uint64_t) tv.tv_sec) < mhd_timeout / 1000LL) |
| { |
| #if ! defined(_WIN32) || defined(__CYGWIN__) |
| tv.tv_sec = (time_t) (mhd_timeout / 1000LL); |
| #else /* Native W32 */ |
| tv.tv_sec = (long) (mhd_timeout / 1000LL); |
| #endif /* Native W32 */ |
| tv.tv_usec = ((long) (mhd_timeout % 1000)) * 1000; |
| } |
| } |
| if (-1 == select ((int) max + 1, &rs, &ws, &es, &tv)) |
| { |
| if (EINTR != errno) |
| abort (); |
| } |
| MHD_run (d); |
| } |
| MHD_stop_daemon (d); |
| return 0; |
| } |
