| /* |
| This file is part of libmicrohttpd |
| Copyright (C) 2007 Christian Grothoff (and other contributing authors) |
| |
| 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 example for how to use libmicrohttpd to serve files (with directory support) |
| * @author Christian Grothoff |
| */ |
| |
| #include "platform.h" |
| #include <dirent.h> |
| #include <microhttpd.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 = cls; |
| |
| (void) fseek (file, pos, SEEK_SET); |
| return fread (buf, 1, max, file); |
| } |
| |
| static void |
| file_free_callback (void *cls) |
| { |
| FILE *file = cls; |
| fclose (file); |
| } |
| |
| static void |
| dir_free_callback (void *cls) |
| { |
| DIR *dir = cls; |
| if (dir != NULL) |
| closedir (dir); |
| } |
| |
| static ssize_t |
| dir_reader (void *cls, uint64_t pos, char *buf, size_t max) |
| { |
| DIR *dir = cls; |
| struct dirent *e; |
| |
| if (max < 512) |
| return 0; |
| do |
| { |
| e = readdir (dir); |
| if (e == NULL) |
| return MHD_CONTENT_READER_END_OF_STREAM; |
| } while (e->d_name[0] == '.'); |
| return snprintf (buf, max, |
| "<a href=\"/%s\">%s</a><br>", |
| e->d_name, |
| e->d_name); |
| } |
| |
| |
| static int |
| 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 **ptr) |
| { |
| static int aptr; |
| struct MHD_Response *response; |
| int ret; |
| FILE *file; |
| DIR *dir; |
| struct stat buf; |
| char emsg[1024]; |
| |
| if (0 != strcmp (method, MHD_HTTP_METHOD_GET)) |
| return MHD_NO; /* unexpected method */ |
| if (&aptr != *ptr) |
| { |
| /* do never respond on first call */ |
| *ptr = &aptr; |
| return MHD_YES; |
| } |
| *ptr = NULL; /* reset when done */ |
| if ( (0 == stat (&url[1], &buf)) && |
| (S_ISREG (buf.st_mode)) ) |
| file = fopen (&url[1], "rb"); |
| else |
| file = NULL; |
| if (file == NULL) |
| { |
| dir = opendir ("."); |
| if (dir == NULL) |
| { |
| /* most likely cause: more concurrent requests than |
| available file descriptors / 2 */ |
| snprintf (emsg, |
| sizeof (emsg), |
| "Failed to open directory `.': %s\n", |
| strerror (errno)); |
| response = MHD_create_response_from_buffer (strlen (emsg), |
| emsg, |
| MHD_RESPMEM_MUST_COPY); |
| if (response == NULL) |
| return MHD_NO; |
| ret = MHD_queue_response (connection, MHD_HTTP_SERVICE_UNAVAILABLE, response); |
| MHD_destroy_response (response); |
| } |
| else |
| { |
| response = MHD_create_response_from_callback (MHD_SIZE_UNKNOWN, |
| 32 * 1024, |
| &dir_reader, |
| dir, |
| &dir_free_callback); |
| if (response == NULL) |
| { |
| closedir (dir); |
| return MHD_NO; |
| } |
| ret = MHD_queue_response (connection, MHD_HTTP_OK, response); |
| MHD_destroy_response (response); |
| } |
| } |
| else |
| { |
| response = MHD_create_response_from_callback (buf.st_size, 32 * 1024, /* 32k page size */ |
| &file_reader, |
| file, |
| &file_free_callback); |
| if (response == NULL) |
| { |
| 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; |
| |
| if (argc != 2) |
| { |
| printf ("%s PORT\n", argv[0]); |
| return 1; |
| } |
| d = MHD_start_daemon (MHD_USE_THREAD_PER_CONNECTION | MHD_USE_DEBUG, |
| atoi (argv[1]), |
| NULL, NULL, &ahc_echo, PAGE, MHD_OPTION_END); |
| if (d == NULL) |
| return 1; |
| (void) getc (stdin); |
| MHD_stop_daemon (d); |
| return 0; |
| } |
