| /* Feel free to use this example code in any way |
| you see fit (Public Domain) */ |
| |
| #include <sys/types.h> |
| #ifndef _WIN32 |
| #include <sys/select.h> |
| #include <sys/socket.h> |
| #else |
| #include <winsock2.h> |
| #endif |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <microhttpd.h> |
| |
| #define PORT 8888 |
| #define POSTBUFFERSIZE 512 |
| #define MAXCLIENTS 2 |
| |
| #define GET 0 |
| #define POST 1 |
| |
| static unsigned int nr_of_uploading_clients = 0; |
| |
| struct connection_info_struct |
| { |
| int connectiontype; |
| struct MHD_PostProcessor *postprocessor; |
| FILE *fp; |
| const char *answerstring; |
| int answercode; |
| }; |
| |
| const char *askpage = "<html><body>\n\ |
| Upload a file, please!<br>\n\ |
| There are %u clients uploading at the moment.<br>\n\ |
| <form action=\"/filepost\" method=\"post\" enctype=\"multipart/form-data\">\n\ |
| <input name=\"file\" type=\"file\">\n\ |
| <input type=\"submit\" value=\" Send \"></form>\n\ |
| </body></html>"; |
| |
| const char *busypage = |
| "<html><body>This server is busy, please try again later.</body></html>"; |
| |
| const char *completepage = |
| "<html><body>The upload has been completed.</body></html>"; |
| |
| const char *errorpage = |
| "<html><body>This doesn't seem to be right.</body></html>"; |
| const char *servererrorpage = |
| "<html><body>An internal server error has occured.</body></html>"; |
| const char *fileexistspage = |
| "<html><body>This file already exists.</body></html>"; |
| |
| |
| static int |
| send_page (struct MHD_Connection *connection, const char *page, |
| int status_code) |
| { |
| int ret; |
| struct MHD_Response *response; |
| |
| response = |
| MHD_create_response_from_buffer (strlen (page), (void *) page, |
| MHD_RESPMEM_MUST_COPY); |
| if (!response) |
| return MHD_NO; |
| MHD_add_response_header (response, MHD_HTTP_HEADER_CONTENT_TYPE, "text/html"); |
| ret = MHD_queue_response (connection, status_code, response); |
| MHD_destroy_response (response); |
| |
| return ret; |
| } |
| |
| |
| static int |
| iterate_post (void *coninfo_cls, enum MHD_ValueKind kind, const char *key, |
| const char *filename, const char *content_type, |
| const char *transfer_encoding, const char *data, uint64_t off, |
| size_t size) |
| { |
| struct connection_info_struct *con_info = coninfo_cls; |
| FILE *fp; |
| |
| con_info->answerstring = servererrorpage; |
| con_info->answercode = MHD_HTTP_INTERNAL_SERVER_ERROR; |
| |
| if (0 != strcmp (key, "file")) |
| return MHD_NO; |
| |
| if (!con_info->fp) |
| { |
| if (NULL != (fp = fopen (filename, "rb"))) |
| { |
| fclose (fp); |
| con_info->answerstring = fileexistspage; |
| con_info->answercode = MHD_HTTP_FORBIDDEN; |
| return MHD_NO; |
| } |
| |
| con_info->fp = fopen (filename, "ab"); |
| if (!con_info->fp) |
| return MHD_NO; |
| } |
| |
| if (size > 0) |
| { |
| if (!fwrite (data, size, sizeof (char), con_info->fp)) |
| return MHD_NO; |
| } |
| |
| con_info->answerstring = completepage; |
| con_info->answercode = MHD_HTTP_OK; |
| |
| return MHD_YES; |
| } |
| |
| |
| static void |
| request_completed (void *cls, struct MHD_Connection *connection, |
| void **con_cls, enum MHD_RequestTerminationCode toe) |
| { |
| struct connection_info_struct *con_info = *con_cls; |
| |
| if (NULL == con_info) |
| return; |
| |
| if (con_info->connectiontype == POST) |
| { |
| if (NULL != con_info->postprocessor) |
| { |
| MHD_destroy_post_processor (con_info->postprocessor); |
| nr_of_uploading_clients--; |
| } |
| |
| if (con_info->fp) |
| fclose (con_info->fp); |
| } |
| |
| free (con_info); |
| *con_cls = NULL; |
| } |
| |
| |
| static int |
| answer_to_connection (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 **con_cls) |
| { |
| if (NULL == *con_cls) |
| { |
| struct connection_info_struct *con_info; |
| |
| if (nr_of_uploading_clients >= MAXCLIENTS) |
| return send_page (connection, busypage, MHD_HTTP_SERVICE_UNAVAILABLE); |
| |
| con_info = malloc (sizeof (struct connection_info_struct)); |
| if (NULL == con_info) |
| return MHD_NO; |
| |
| con_info->fp = NULL; |
| |
| if (0 == strcmp (method, "POST")) |
| { |
| con_info->postprocessor = |
| MHD_create_post_processor (connection, POSTBUFFERSIZE, |
| iterate_post, (void *) con_info); |
| |
| if (NULL == con_info->postprocessor) |
| { |
| free (con_info); |
| return MHD_NO; |
| } |
| |
| nr_of_uploading_clients++; |
| |
| con_info->connectiontype = POST; |
| con_info->answercode = MHD_HTTP_OK; |
| con_info->answerstring = completepage; |
| } |
| else |
| con_info->connectiontype = GET; |
| |
| *con_cls = (void *) con_info; |
| |
| return MHD_YES; |
| } |
| |
| if (0 == strcmp (method, "GET")) |
| { |
| char buffer[1024]; |
| |
| snprintf (buffer, sizeof (buffer), askpage, nr_of_uploading_clients); |
| return send_page (connection, buffer, MHD_HTTP_OK); |
| } |
| |
| if (0 == strcmp (method, "POST")) |
| { |
| struct connection_info_struct *con_info = *con_cls; |
| |
| if (0 != *upload_data_size) |
| { |
| MHD_post_process (con_info->postprocessor, upload_data, |
| *upload_data_size); |
| *upload_data_size = 0; |
| |
| return MHD_YES; |
| } |
| else |
| { |
| if (NULL != con_info->fp) |
| { |
| fclose (con_info->fp); |
| con_info->fp = NULL; |
| } |
| /* Now it is safe to open and inspect the file before calling send_page with a response */ |
| return send_page (connection, con_info->answerstring, |
| con_info->answercode); |
| } |
| |
| } |
| |
| return send_page (connection, errorpage, MHD_HTTP_BAD_REQUEST); |
| } |
| |
| |
| int |
| main () |
| { |
| struct MHD_Daemon *daemon; |
| |
| daemon = MHD_start_daemon (MHD_USE_SELECT_INTERNALLY, PORT, NULL, NULL, |
| &answer_to_connection, NULL, |
| MHD_OPTION_NOTIFY_COMPLETED, request_completed, |
| NULL, MHD_OPTION_END); |
| if (NULL == daemon) |
| return 1; |
| (void) getchar (); |
| MHD_stop_daemon (daemon); |
| return 0; |
| } |
