/****************************************************************** * $Id: nanohttp-server.c,v 1.23 2004/09/14 15:50:54 snowdrop Exp $ * * CSOAP Project: A http client/server library in C * Copyright (C) 2003 Ferhat Ayaz * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. * * Email: ayaz@jprogrammer.net ******************************************************************/ #include #include #include #include #ifdef HAVE_CONFIG_H #include #endif #ifndef WIN32 /* According to POSIX 1003.1-2001 */ #include /* According to earlier standards */ #include #include #include #endif /* * ----------------------------------------------------- * nano httpd * internally globals * ----------------------------------------------------- */ static int _httpd_port = 10000; static int _httpd_max_connections = 20; static int _httpd_max_idle = 120; static hsocket_t _httpd_socket; static hservice_t *_httpd_services_head = NULL; static hservice_t *_httpd_services_tail = NULL; static int _httpd_run = 1; #ifdef WIN32 static DWORD _httpd_terminate_signal = CTRL_C_EVENT; #else static int _httpd_terminate_signal = SIGTERM; #endif static conndata_t *_httpd_connection; #ifdef WIN32 #include #endif /* * ----------------------------------------------------- * FUNCTION: httpd_init * NOTE: This will be called from soap_server_init_args() * ----------------------------------------------------- */ int httpd_init (int argc, char *argv[]) { int i, status; status = hsocket_module_init (); if (status != 0) return status; /* write argument information */ log_verbose1 ("Arguments:"); for (i = 0; i < argc; i++) log_verbose3 ("argv[%i] = '%s'", i, SAVE_STR (argv[i])); /* initialize from arguments */ for (i = 0; i < argc; i++) { if (!strcmp (argv[i], NHTTPD_ARG_PORT) && i < argc - 1) { _httpd_port = atoi (argv[i + 1]); } else if (!strcmp (argv[i], NHTTPD_ARG_TERMSIG) && i < argc - 1) { _httpd_terminate_signal = atoi (argv[i + 1]); } else if (!strcmp (argv[i], NHTTPD_ARG_MAXCONN) && i < argc - 1) { _httpd_max_connections = atoi (argv[i + 1]); } } log_verbose2 ("socket bind to port '%d'", _httpd_port); /* init built-in services */ /* httpd_register("/httpd/list", service_list);*/ _httpd_connection = calloc (_httpd_max_connections, sizeof (conndata_t)); for (i = 0; i < _httpd_max_connections; i++) { memset ((char *) &_httpd_connection[i], 0, sizeof (_httpd_connection[i])); } #ifdef WIN32 if (_beginthread (WSAReaper, 0, NULL) == -1) { log_error1 ("Winsock reaper thread failed to start"); return (-1); } #endif /* create socket */ hsocket_init (&_httpd_socket); status = hsocket_bind (&_httpd_socket, _httpd_port); return status; } /* * ----------------------------------------------------- * FUNCTION: httpd_register * ----------------------------------------------------- */ int httpd_register (const char *ctx, httpd_service func) { hservice_t *service; service = (hservice_t *) malloc (sizeof (hservice_t)); service->next = NULL; service->func = func; strcpy (service->ctx, ctx); log_verbose3 ("register service:t(%p):%s", service, SAVE_STR (ctx)); if (_httpd_services_head == NULL) { _httpd_services_head = _httpd_services_tail = service; } else { _httpd_services_tail->next = service; _httpd_services_tail = service; } return 1; } /* * ----------------------------------------------------- * FUNCTION: httpd_services * ----------------------------------------------------- */ hservice_t * httpd_services () { return _httpd_services_head; } /* * ----------------------------------------------------- * FUNCTION: httpd_find_service * ----------------------------------------------------- */ static hservice_t * httpd_find_service (const char *ctx) { hservice_t *cur = _httpd_services_head; while (cur != NULL) { if (!strcmp (cur->ctx, ctx)) { return cur; } cur = cur->next; } return NULL; } /* * ----------------------------------------------------- * FUNCTION: httpd_response_set_content_type * ----------------------------------------------------- */ void httpd_response_set_content_type (httpd_conn_t * res, const char *content_type) { strncpy (res->content_type, content_type, 25); } /* * ----------------------------------------------------- * FUNCTION: httpd_response_send_header * ----------------------------------------------------- */ int httpd_send_header (httpd_conn_t * res, int code, const char *text, hpair_t * pair) { struct tm stm; time_t nw; char buffer[255]; char header[1024]; hpair_t *cur; int status; /* set status code */ sprintf (header, "HTTP/1.1 %d %s\r\n", code, text); /* set date */ nw = time (NULL); localtime_r (&nw, &stm); strftime (buffer, 255, "Date: %a, %d %b %y %T GMT", &stm); strcat (header, buffer); strcat (header, "\r\n"); /* set content-type */ /* * if (res->content_type[0] == '\0') { strcat(header, "Content-Type: * text/html\r\n"); } else { sprintf(buffer, "Content-Type: %s\r\n", * res->content_type); strcat(header, buffer); } */ /* set server name */ strcat (header, "Server: Nano HTTPD library\r\n"); /* set _httpd_connection status */ strcat (header, "Connection: close\r\n"); /* add pairs */ cur = pair; while (cur != NULL) { sprintf (buffer, "%s: %s\r\n", cur->key, cur->value); strcat (header, buffer); cur = cur->next; } /* set end of header */ strcat (header, "\r\n"); /* send header */ status = hsocket_nsend (res->sock, header, strlen (header)); return status; } int httpd_send_internal_error (httpd_conn_t * conn, const char *errmsg) { const char *template1 = "

Error!

Message: '%s' \r\n"; char buffer[4064]; sprintf (buffer, template1, errmsg); httpd_send_header (conn, 500, "INTERNAL", NULL); return send (conn->sock, buffer, strlen (buffer), 0); } /* * ----------------------------------------------------- * FUNCTION: httpd_request_print * ----------------------------------------------------- */ static void httpd_request_print (hrequest_t * req) { hpair_t *pair; log_verbose1 ("++++++ Request +++++++++"); log_verbose2 (" Method : '%s'", req->method); log_verbose2 (" Path : '%s'", req->path); log_verbose2 (" Spec : '%s'", req->spec); log_verbose1 (" Parsed query string :"); pair = req->query; while (pair != NULL) { log_verbose3 (" %s = '%s'", pair->key, pair->value); pair = pair->next; } log_verbose1 ("++++++++++++++++++++++++"); } /* * ----------------------------------------------------- * FUNCTION: httpd_session_main * ----------------------------------------------------- */ #ifdef WIN32 static unsigned _stdcall httpd_session_main (void *data) #else static void * httpd_session_main (void *data) #endif { conndata_t *conn = (conndata_t *) data; const char *msg = "SESSION 1.0\n"; int len = strlen (msg); char ch[2]; char buffer[256]; /* temp buffer for recv() */ char header[4064]; /* received header */ int total; /* result from recv() */ int headerreached = 0; /* whether reach header * "\n\n" */ hrequest_t *req = NULL; /* only for test */ httpd_conn_t *rconn; hservice_t *service = NULL; long content_length = 0; header[0] = '\0'; len = 0; log_verbose1 ("starting httpd_session_main()"); conn->atime = time ((time_t) 0); while (len < 4064) { /* printf("receiving ...\n"); */ total = recv (conn->sock, ch, 1, 0); if (total == 0) break; header[len] = ch[0]; len++; if (len > 3) { if (!strncmp (&header[len - 4], "\r\n\r\n", 4)) { header[len] = '\0'; break; } } } /* log_verbose2("=== HEADER ===\n%s\n============\n", header); */ /* call the service */ req = hrequest_new_from_buffer (header); httpd_request_print (req); rconn = (httpd_conn_t *) malloc (sizeof (httpd_conn_t)); rconn->sock = conn->sock; rconn->content_type[0] = '\0'; service = httpd_find_service (req->path); if (service != NULL) { log_verbose2 ("service '%s' found", req->path); if (service->func != NULL) { service->func (rconn, req); } else { sprintf (buffer, "service '%s' not registered properly (func == NULL)", req->path); log_verbose1 (buffer); httpd_send_internal_error (rconn, buffer); } } else { sprintf (buffer, "service '%s' not found", req->path); log_verbose1 (buffer); httpd_send_internal_error (rconn, buffer); } close (conn->sock); conn->sock = 0; /* httpd_response_free(res); */ hrequest_free (req); #ifdef WIN32 CloseHandle ((HANDLE) conn->tid); _endthread (); return 0; #else pthread_exit (NULL); return service; #endif } /* * ----------------------------------------------------- * FUNCTION: httpd_term * ----------------------------------------------------- */ #ifdef WIN32 BOOL WINAPI httpd_term(DWORD sig) { log_debug2("Got signal %d", sig); if (sig == _httpd_terminate_signal) _httpd_run = 0; return TRUE; } #else void httpd_term (int sig) { log_debug2("Got signal %d", sig); if (sig == _httpd_terminate_signal) _httpd_run = 0; } #endif /* * ----------------------------------------------------- * FUNCTION: _httpd_register_signal_handler * ----------------------------------------------------- */ static void _httpd_register_signal_handler() { log_verbose2 ("registering termination signal handler (SIGNAL:%d)", _httpd_terminate_signal); #ifdef WIN32 if (SetConsoleCtrlHandler((PHANDLER_ROUTINE)httpd_term, TRUE) == FALSE){ log_error1 ("Unable to install console event handler!"); } #else signal (_httpd_terminate_signal, httpd_term); #endif } /*-------------------------------------------------- FUNCTION: _httpd_wait_for_empty_conn ----------------------------------------------------*/ static conndata_t *_httpd_wait_for_empty_conn() { int i; for (i = 0;; i++) { if (!_httpd_run) return NULL; if (i >= _httpd_max_connections) { system_sleep(1); i = 0; } else if (_httpd_connection[i].sock == 0) { break; } } return &_httpd_connection[i]; } /* * ----------------------------------------------------- * FUNCTION: _httpd_start_thread * ----------------------------------------------------- */ static void _httpd_start_thread(conndata_t* conn) { int err; #ifdef WIN32 conn->tid = (HANDLE) _beginthreadex (NULL, 65535, httpd_session_main, conn, 0, &err); #else pthread_attr_init (&(conn-> attr)); #ifdef PTHREAD_CREATE_DETACHED pthread_attr_setdetachstate (&(conn->attr), PTHREAD_CREATE_DETACHED); #endif err = pthread_create (&(conn->tid), &(conn->attr),httpd_session_main, conn); if (err) { log_error2 ("Error creating thread: ('%d')", err); } #endif } /* * ----------------------------------------------------- * FUNCTION: _httpd_select * Returns 0 if success != otherwise * ----------------------------------------------------- */ static int _httpd_select(fd_set *pfds) { int err; struct timeval timeout; timeout.tv_sec = 1; timeout.tv_usec = 0; #ifndef WIN32 select (1, pfds, NULL, NULL, &timeout); #else if (select (1, pfds, NULL, NULL, &timeout) == SOCKET_ERROR) { err = WSAGetLastError (); log_error1 ("select error"); return 1; } #endif return 0; } /* * ----------------------------------------------------- * FUNCTION: httpd_run * ----------------------------------------------------- */ int httpd_run () { int err; conndata_t *conn; fd_set fds; log_verbose1 ("starting run routine"); /* listen to port */ err = hsocket_listen (_httpd_socket, 15); if (err != HSOCKET_OK) { log_error2 ("httpd_run(): '%d'", err); return err; } log_verbose2 ("listening to port '%d'", _httpd_port); /* register signal handler */ _httpd_register_signal_handler(); /* make the socket non blocking */ err = hsocket_makenonblock (_httpd_socket); if (err != HSOCKET_OK) { log_error2 ("httpd_run(): '%d'", err); return err; } /* zero file descriptior */ FD_ZERO (&fds); FD_SET (_httpd_socket, &fds); while (_httpd_run) { /* Get an empty connection struct */ conn = _httpd_wait_for_empty_conn(); if (!_httpd_run) break; /* Select file descriptor */ if (_httpd_select(&fds)) { log_error1("Can not select!"); return -1; } /* Wait for a socket to accept */ while (_httpd_run && (!FD_ISSET (_httpd_socket, &fds))); if (!_httpd_run) break; /* Accept a socket */ err = hsocket_accept(_httpd_socket, &(conn->sock)); if (err != HSOCKET_OK) { log_error2("Can not accept socket: %d", err); return -1; /* this is hard core! */ } /* Now start a thread */ _httpd_start_thread(conn); } free (_httpd_connection); return 0; } char * httpd_get_postdata (httpd_conn_t * conn, hrequest_t * req, long *received, long max) { char *content_length_str; long content_length = 0; long total = 0; char *postdata = NULL; if (!strcmp (req->method, "POST")) { content_length_str = hpairnode_get_ignore_case (req->header, HEADER_CONTENT_LENGTH); if (content_length_str != NULL) content_length = atol (content_length_str); } else { log_warn1 ("Not a POST method"); return NULL; } if (content_length > max && max != -1) return NULL; if (content_length == 0) { *received = 0; postdata = (char *) malloc (1); postdata[0] = '\0'; return postdata; } postdata = (char *) malloc (content_length + 1); if (postdata == NULL) { log_error1 ("Not enough memory"); return NULL; } if (hsocket_read (conn->sock, postdata, (int) content_length, 1) == HSOCKET_OK) { *received = content_length; postdata[content_length] = '\0'; return postdata; } free (postdata); return NULL; }