/****************************************************************** * $Id: nanohttp-server.c,v 1.29 2004/10/29 09:27:05 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 #else #include #endif #ifdef MEM_DEBUG #include #endif typedef struct _conndata { hsocket_t sock; #ifdef WIN32 HANDLE tid; #else pthread_t tid; pthread_attr_t attr; #endif time_t atime; }conndata_t; /* * ----------------------------------------------------- * 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 static void WSAReaper(void *x); #endif /* * ----------------------------------------------------- * FUNCTION: httpd_init * NOTE: This will be called from soap_server_init_args() * ----------------------------------------------------- */ herror_t httpd_init (int argc, char *argv[]) { int i; herror_t status; hoption_init_args(argc, argv); status = hsocket_module_init (); if (status != H_OK) 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 herror_new("httpd_init", THREAD_BEGIN_ERROR, "_beginthread() failed while starting WSAReaper"); } */ #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_services * ----------------------------------------------------- */ static void hservice_free(hservice_t *service) { free(service); } /* * ----------------------------------------------------- * 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 * ----------------------------------------------------- */ herror_t httpd_send_header (httpd_conn_t * res, int code, const char *text) { struct tm stm; time_t nw; char buffer[255]; char header[1024]; hpair_t *cur; herror_t 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 = res->header; 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)); if (status != H_OK) return status; res->out = http_output_stream_new (res->sock, res->header); return H_OK; } 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"); 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 == HTTP_REQUEST_POST)?"POST":"GET"); log_verbose2 (" Path : '%s'", req->path); log_verbose2 (" Spec : '%s'", (req->version==HTTP_1_0)?"HTTP/1.0":"HTTP/1.1"); log_verbose1 (" Parsed query string :"); pair = req->query; while (pair != NULL) { log_verbose3 (" %s = '%s'", pair->key, pair->value); pair = pair->next; } log_verbose1 ("++++++++++++++++++++++++"); } httpd_conn_t *httpd_new(hsocket_t sock) { httpd_conn_t *conn = (httpd_conn_t *) malloc (sizeof (httpd_conn_t)); conn->sock = sock; conn->out = NULL; conn->content_type[0] = '\0'; conn->header = NULL; return conn; } void httpd_free(httpd_conn_t *conn) { if (conn->out != NULL) http_output_stream_free(conn->out); if (conn->header != NULL) hpairnode_free_deep(conn->header); free(conn); } /* * ----------------------------------------------------- * 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 buffer[256]; /* temp buffer for recv() */ char header[4064]; /* received header */ 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; herror_t status; header[0] = '\0'; len = 0; log_verbose1 ("starting httpd_session_main()"); conn->atime = time ((time_t) 0); /* call the service */ /* req = hrequest_new_from_buffer (header);*/ rconn = httpd_new(conn->sock); status = hrequest_new_from_socket (conn->sock, &req); if (status != H_OK) { httpd_send_internal_error (rconn, herror_message(status)/*"Request parse error!"*/); herror_release(status); } else { httpd_request_print (req); 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); } /* httpd_response_free(res); */ /*hrequest_free (req);*/ } hsocket_close(conn->sock); conn->sock = 0; hrequest_free(req); httpd_free(rconn); #ifdef WIN32 CloseHandle ((HANDLE) conn->tid); _endthread (); return 0; #else pthread_exit (NULL); return service; #endif } int httpd_set_header (httpd_conn_t * conn, const char *key, const char *value) { hpair_t *p; if (conn == NULL) { log_warn1 ("Connection object is NULL"); return 0; } p = conn->header; while (p != NULL) { if (p->key != NULL) { if (!strcmp (p->key, key)) { free (p->value); p->value = (char *) malloc (strlen (value) + 1); strcpy (p->value, value); return 1; } } p = p->next; } conn->header = hpairnode_new (key, value, conn->header); return 0; } void httpd_set_headers(httpd_conn_t *conn, hpair_t *header) { while (header) { httpd_set_header(conn, header->key, header->value); header = header->next; } } /* * ----------------------------------------------------- * 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_run * ----------------------------------------------------- */ herror_t httpd_run () { herror_t err; conndata_t *conn; fd_set fds; struct timeval timeout; log_verbose1 ("starting run routine"); timeout.tv_sec = 1; timeout.tv_usec = 0; /* listen to port */ err = hsocket_listen (_httpd_socket); if (err != H_OK) { log_error2 ("httpd_run(): '%d'", herror_message(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_block (_httpd_socket, 0); if (err != H_OK) { log_error2 ("httpd_run(): '%s'", herror_message(err)); return err; } while (_httpd_run) { /* Get an empty connection struct */ conn = _httpd_wait_for_empty_conn (); if (!_httpd_run) break; /* Wait for a socket to accept */ while (_httpd_run) { /* zero and set file descriptior */ FD_ZERO (&fds); FD_SET (_httpd_socket, &fds); /* select socket descriptor */ switch (select (_httpd_socket + 1, &fds, NULL, NULL, &timeout)) { case 0: /* descriptor is not ready */ continue; case -1: /* got a signal? */ continue; default: /* no nothing */ break; } if (FD_ISSET (_httpd_socket, &fds)) { break; } } /* check signal status */ if (!_httpd_run) break; /* Accept a socket */ err = hsocket_accept (_httpd_socket, &(conn->sock)); if (err != H_OK) { log_error2 ("Can not accept socket: %s", herror_message(err)); return err; /* this is hard core! */ } /* Now start a thread */ _httpd_start_thread (conn); } free (_httpd_connection); return 0; } void httpd_destroy() { hservice_t *tmp, *cur = _httpd_services_head; while (cur != NULL) { tmp = cur->next; hservice_free(cur); cur = tmp; } } #ifdef WIN32 static void WSAReaper(void *x) { short int connections; short int i; char junk[10]; int rc; time_t ctime; for (;;) { connections=0; ctime=time((time_t)0); for (i=0;i<_httpd_max_connections;i++) { if (_httpd_connection[i].tid==0) continue; GetExitCodeThread((HANDLE)_httpd_connection[i].tid,(PDWORD) &rc); if (rc!=STILL_ACTIVE) continue; connections++; if ((ctime-_httpd_connection[i].atime<_httpd_max_idle)|| (_httpd_connection[i].atime==0)) continue; log_verbose3("Reaping socket %u from (runtime ~= %d seconds)", _httpd_connection[i].sock, ctime-_httpd_connection[i].atime); shutdown(_httpd_connection[i].sock, 2); while (recv(_httpd_connection[i].sock, junk, sizeof(junk), 0)>0) { }; closesocket(_httpd_connection[i].sock); _httpd_connection[i].sock = 0; TerminateThread(_httpd_connection[i].tid, (DWORD)&rc); CloseHandle(_httpd_connection[i].tid); memset((char *)&_httpd_connection[i], 0, sizeof(_httpd_connection[i])); } Sleep(100); } return; } #endif unsigned 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; unsigned char *postdata = NULL; if (req->method == HTTP_REQUEST_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 = (unsigned char *) malloc (content_length + 1); if (postdata == NULL) { log_error1 ("Not enough memory"); return NULL; } if (http_input_stream_read(req->in, postdata, (int) content_length) > 0) { *received = content_length; postdata[content_length] = '\0'; return postdata; } free (postdata); return NULL; } /* MIME support httpd_mime_* function set */ static void _httpd_mime_get_boundary (httpd_conn_t * conn, char *dest) { sprintf (dest, "---=.Part_NH_%p", conn); log_verbose2 ("boundary= \"%s\"", dest); } /** Begin MIME multipart/related POST Returns: H_OK or error flag */ herror_t httpd_mime_send_header (httpd_conn_t * conn, const char *related_start, const char *related_start_info, const char *related_type, int code, const char *text) { char buffer[300]; char temp[250]; char boundary[250]; /* Set Content-type Set multipart/related parameter type=..; start=.. ; start-info= ..; boundary=... */ /* using sprintf instead of snprintf because visual c does not support snprintf */ #ifdef WIN32 #define snprintf(buffer, num, s1, s2) sprintf(buffer, s1,s2) #endif sprintf (buffer, "multipart/related;"); if (related_type) { snprintf (temp, 75, " type=\"%s\";", related_type); strcat (buffer, temp); } if (related_start) { snprintf (temp, 250, " start=\"%s\";", related_start); strcat (buffer, temp); } if (related_start_info) { snprintf (temp, 250, " start-info=\"%s\";", related_start_info); strcat (buffer, temp); } _httpd_mime_get_boundary (conn, boundary); snprintf (temp, 250, " boundary=\"%s\"", boundary); strcat (buffer, temp); httpd_set_header (conn, HEADER_CONTENT_TYPE, buffer); return httpd_send_header (conn, code, text); } /** Send boundary and part header and continue with next part */ herror_t httpd_mime_next (httpd_conn_t * conn, const char *content_id, const char *content_type, const char *transfer_encoding) { herror_t status; char buffer[512]; char boundary[75]; /* Get the boundary string */ _httpd_mime_get_boundary (conn, boundary); sprintf (buffer, "\r\n--%s\r\n", boundary); /* Send boundary */ status = http_output_stream_write (conn->out, (const byte_t *) buffer, strlen (buffer)); if (status != H_OK) return status; /* Send Content header */ sprintf (buffer, "%s: %s\r\n%s: %s\r\n%s: %s\r\n\r\n", HEADER_CONTENT_TYPE, content_type ? content_type : "text/plain", HEADER_CONTENT_TRANSFER_ENCODING, transfer_encoding ? transfer_encoding : "binary", HEADER_CONTENT_ID, content_id ? content_id : ""); status = http_output_stream_write (conn->out, (const byte_t *) buffer, strlen (buffer)); return status; } /** Send boundary and part header and continue with next part */ herror_t httpd_mime_send_file (httpd_conn_t * conn, const char *content_id, const char *content_type, const char *transfer_encoding, const char *filename) { herror_t status; FILE *fd = fopen (filename, "rb"); byte_t buffer[MAX_FILE_BUFFER_SIZE]; size_t size; if (fd == NULL) return herror_new("httpd_mime_send_file", FILE_ERROR_OPEN, "Can not open file '%d'", filename); status = httpd_mime_next (conn, content_id, content_type, transfer_encoding); if (status != H_OK) { fclose (fd); return status; } while (!feof (fd)) { size = fread (buffer, 1, MAX_FILE_BUFFER_SIZE, fd); if (size == -1) { fclose (fd); return herror_new("httpd_mime_send_file", FILE_ERROR_READ, "Can not read from file '%d'", filename); } status = http_output_stream_write (conn->out, buffer, size); if (status != H_OK) { fclose (fd); return status; } } fclose (fd); return H_OK; } /** Finish MIME request Returns: H_OK or error flag */ herror_t httpd_mime_end (httpd_conn_t * conn) { herror_t status; char buffer[512]; char boundary[75]; /* Get the boundary string */ _httpd_mime_get_boundary (conn, boundary); sprintf (buffer, "\r\n--%s--\r\n\r\n", boundary); /* Send boundary */ status = http_output_stream_write (conn->out, (const byte_t *) buffer, strlen (buffer)); if (status != H_OK) return status; /* Flush put stream */ status = http_output_stream_flush (conn->out); return status; }