1 #include <opensrf/osrf_app_session.h>
4 /** Send the given message */
5 static int _osrf_app_session_send( osrfAppSession*, osrfMessage* msg );
7 static int osrfAppSessionMakeLocaleRequest(
8 osrfAppSession* session, const jsonObject* params, const char* method_name,
9 int protocol, osrfStringArray* param_strings, char* locale );
11 /* the global app_session cache */
12 osrfHash* osrfAppSessionCache = NULL;
14 // --------------------------------------------------------------------------
15 // --------------------------------------------------------------------------
17 // --------------------------------------------------------------------------
19 /** Allocates and initializes a new app_request object */
20 static osrfAppRequest* _osrf_app_request_init(
21 osrfAppSession* session, osrfMessage* msg ) {
24 (osrfAppRequest*) safe_malloc(sizeof(osrfAppRequest));
26 req->session = session;
27 req->request_id = msg->thread_trace;
31 req->reset_timeout = 0;
38 void osrfAppSessionCleanup() {
39 osrfHashFree(osrfAppSessionCache);
42 /** Frees memory used by an app_request object */
43 static void _osrf_app_request_free( void * req ){
44 if( req == NULL ) return;
45 osrfAppRequest* r = (osrfAppRequest*) req;
46 if( r->payload ) osrfMessageFree( r->payload );
50 /** Pushes the given message onto the list of 'responses' to this request */
51 static void _osrf_app_request_push_queue( osrfAppRequest* req, osrfMessage* result ){
52 if(req == NULL || result == NULL) return;
53 osrfLogDebug( OSRF_LOG_MARK, "App Session pushing request [%d] onto request queue", result->thread_trace );
54 if(req->result == NULL) {
59 osrfMessage* ptr = req->result;
60 osrfMessage* ptr2 = req->result->next;
69 /** Removes this app_request from our session request set */
70 void osrf_app_session_request_finish(
71 osrfAppSession* session, int req_id ){
73 if(session == NULL) return;
74 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, req_id );
75 if(req == NULL) return;
76 osrfListRemove( req->session->request_queue, req->request_id );
80 void osrf_app_session_request_reset_timeout( osrfAppSession* session, int req_id ) {
81 if(session == NULL) return;
82 osrfLogDebug( OSRF_LOG_MARK, "Resetting request timeout %d", req_id );
83 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, req_id );
84 if(req == NULL) return;
85 req->reset_timeout = 1;
88 /** Checks the receive queue for messages. If any are found, the first
89 * is popped off and returned. Otherwise, this method will wait at most timeout
90 * seconds for a message to appear in the receive queue. Once it arrives it is returned.
91 * If no messages arrive in the timeout provided, null is returned.
93 static osrfMessage* _osrf_app_request_recv( osrfAppRequest* req, int timeout ) {
95 if(req == NULL) return NULL;
97 if( req->result != NULL ) {
98 /* pop off the first message in the list */
99 osrfMessage* tmp_msg = req->result;
100 req->result = req->result->next;
104 time_t start = time(NULL);
105 time_t remaining = (time_t) timeout;
107 while( remaining >= 0 ) {
108 /* tell the session to wait for stuff */
109 osrfLogDebug( OSRF_LOG_MARK, "In app_request receive with remaining time [%d]", (int) remaining );
111 osrf_app_session_queue_wait( req->session, 0, NULL );
112 if(req->session->transport_error) {
113 osrfLogError(OSRF_LOG_MARK, "Transport error in recv()");
117 if( req->result != NULL ) { /* if we received anything */
118 /* pop off the first message in the list */
119 osrfLogDebug( OSRF_LOG_MARK, "app_request_recv received a message, returning it");
120 osrfMessage* ret_msg = req->result;
121 osrfMessage* tmp_msg = ret_msg->next;
122 req->result = tmp_msg;
123 if (ret_msg->sender_locale) {
124 if (req->session->session_locale)
125 free(req->session->session_locale);
126 req->session->session_locale = strdup(ret_msg->sender_locale);
134 osrf_app_session_queue_wait( req->session, (int) remaining, NULL );
136 if(req->session->transport_error) {
137 osrfLogError(OSRF_LOG_MARK, "Transport error in recv()");
141 if( req->result != NULL ) { /* if we received anything */
142 /* pop off the first message in the list */
143 osrfLogDebug( OSRF_LOG_MARK, "app_request_recv received a message, returning it");
144 osrfMessage* ret_msg = req->result;
145 osrfMessage* tmp_msg = ret_msg->next;
146 req->result = tmp_msg;
147 if (ret_msg->sender_locale) {
148 if (req->session->session_locale)
149 free(req->session->session_locale);
150 req->session->session_locale = strdup(ret_msg->sender_locale);
157 if(req->reset_timeout) {
158 remaining = (time_t) timeout;
159 req->reset_timeout = 0;
160 osrfLogDebug( OSRF_LOG_MARK, "Received a timeout reset");
162 remaining -= (int) (time(NULL) - start);
166 osrfLogInfo( OSRF_LOG_MARK, "Returning NULL from app_request_recv after timeout");
170 /** Resend this requests original request message */
171 static int _osrf_app_request_resend( osrfAppRequest* req ) {
172 if(req == NULL) return 0;
174 osrfLogDebug( OSRF_LOG_MARK, "Resending request [%d]", req->request_id );
175 return _osrf_app_session_send( req->session, req->payload );
182 // --------------------------------------------------------------------------
183 // --------------------------------------------------------------------------
185 // --------------------------------------------------------------------------
187 /** returns a session from the global session hash */
188 char* osrf_app_session_set_locale( osrfAppSession* session, const char* locale ) {
189 if (!session || !locale)
192 if(session->session_locale)
193 free(session->session_locale);
195 session->session_locale = strdup( locale );
196 return session->session_locale;
199 /** returns a session from the global session hash */
200 osrfAppSession* osrf_app_session_find_session( const char* session_id ) {
201 if(session_id) return osrfHashGet(osrfAppSessionCache, session_id);
206 /** adds a session to the global session cache */
207 static void _osrf_app_session_push_session( osrfAppSession* session ) {
209 if( osrfAppSessionCache == NULL ) osrfAppSessionCache = osrfNewHash();
210 if( osrfHashGet( osrfAppSessionCache, session->session_id ) ) return;
211 osrfHashSet( osrfAppSessionCache, session, session->session_id );
214 /** Allocates and initializes a new app_session */
216 osrfAppSession* osrfAppSessionClientInit( const char* remote_service ) {
217 return osrf_app_client_session_init( remote_service );
220 osrfAppSession* osrf_app_client_session_init( const char* remote_service ) {
222 if (!remote_service) {
223 osrfLogWarning( OSRF_LOG_MARK, "No remote service specified in osrf_app_client_session_init");
227 osrfAppSession* session = safe_malloc(sizeof(osrfAppSession));
229 session->transport_handle = osrfSystemGetTransportClient();
230 if( session->transport_handle == NULL ) {
231 osrfLogWarning( OSRF_LOG_MARK, "No transport client for service 'client'");
236 osrfStringArray* arr = osrfNewStringArray(8);
237 osrfConfigGetValueList(NULL, arr, "/domain");
238 char* domain = osrfStringArrayGetString(arr, 0);
241 osrfLogWarning( OSRF_LOG_MARK, "No domains specified in the OpenSRF config file");
243 osrfStringArrayFree(arr);
247 char* router_name = osrfConfigGetValue(NULL, "/router_name");
249 osrfLogWarning( OSRF_LOG_MARK, "No router name specified in the OpenSRF config file");
251 osrfStringArrayFree(arr);
255 char target_buf[512];
256 target_buf[ 0 ] = '\0';
258 int len = snprintf( target_buf, sizeof(target_buf), "%s@%s/%s",
259 router_name ? router_name : "(null)",
260 domain ? domain : "(null)",
261 remote_service ? remote_service : "(null)" );
262 osrfStringArrayFree(arr);
266 if( len >= sizeof( target_buf ) ) {
267 osrfLogWarning( OSRF_LOG_MARK, "Buffer overflow for remote_id");
272 session->request_queue = osrfNewList();
273 session->request_queue->freeItem = &_osrf_app_request_free;
274 session->remote_id = strdup(target_buf);
275 session->orig_remote_id = strdup(session->remote_id);
276 session->remote_service = strdup(remote_service);
277 session->session_locale = NULL;
278 session->transport_error = 0;
280 #ifdef ASSUME_STATELESS
281 session->stateless = 1;
282 osrfLogDebug( OSRF_LOG_MARK, "%s session is stateless", remote_service );
284 session->stateless = 0;
285 osrfLogDebug( OSRF_LOG_MARK, "%s session is NOT stateless", remote_service );
288 /* build a chunky, random session id */
291 snprintf(id, sizeof(id), "%f.%d%ld", get_timestamp_millis(), (int)time(NULL), (long) getpid());
292 session->session_id = strdup(id);
293 osrfLogDebug( OSRF_LOG_MARK, "Building a new client session with id [%s] [%s]",
294 session->remote_service, session->session_id );
296 session->thread_trace = 0;
297 session->state = OSRF_SESSION_DISCONNECTED;
298 session->type = OSRF_SESSION_CLIENT;
299 //session->next = NULL;
301 session->userData = NULL;
302 session->userDataFree = NULL;
304 _osrf_app_session_push_session( session );
308 osrfAppSession* osrf_app_server_session_init(
309 const char* session_id, const char* our_app, const char* remote_id ) {
311 osrfLogDebug( OSRF_LOG_MARK, "Initing server session with session id %s, service %s,"
312 " and remote_id %s", session_id, our_app, remote_id );
314 osrfAppSession* session = osrf_app_session_find_session( session_id );
315 if(session) return session;
317 session = safe_malloc(sizeof(osrfAppSession));
319 session->transport_handle = osrfSystemGetTransportClient();
320 if( session->transport_handle == NULL ) {
321 osrfLogWarning( OSRF_LOG_MARK, "No transport client for service '%s'", our_app );
327 char* statel = osrf_settings_host_value("/apps/%s/stateless", our_app );
328 if(statel) stateless = atoi(statel);
332 session->request_queue = osrfNewList();
333 session->request_queue->freeItem = &_osrf_app_request_free;
334 session->remote_id = strdup(remote_id);
335 session->orig_remote_id = strdup(remote_id);
336 session->session_id = strdup(session_id);
337 session->remote_service = strdup(our_app);
338 session->stateless = stateless;
340 #ifdef ASSUME_STATELESS
341 session->stateless = 1;
343 session->stateless = 0;
346 session->thread_trace = 0;
347 session->state = OSRF_SESSION_DISCONNECTED;
348 session->type = OSRF_SESSION_SERVER;
349 session->session_locale = NULL;
351 session->userData = NULL;
352 session->userDataFree = NULL;
354 _osrf_app_session_push_session( session );
361 /** frees memory held by a session */
362 static void _osrf_app_session_free( osrfAppSession* session ){
366 if( session->userDataFree && session->userData )
367 session->userDataFree(session->userData);
369 if(session->session_locale)
370 free(session->session_locale);
372 free(session->remote_id);
373 free(session->orig_remote_id);
374 free(session->session_id);
375 free(session->remote_service);
376 osrfListFree(session->request_queue);
380 int osrfAppSessionMakeRequest(
381 osrfAppSession* session, const jsonObject* params,
382 const char* method_name, int protocol, osrfStringArray* param_strings ) {
384 return osrfAppSessionMakeLocaleRequest( session, params,
385 method_name, protocol, param_strings, NULL );
388 static int osrfAppSessionMakeLocaleRequest(
389 osrfAppSession* session, const jsonObject* params, const char* method_name,
390 int protocol, osrfStringArray* param_strings, char* locale ) {
392 if(session == NULL) return -1;
396 osrfMessage* req_msg = osrf_message_init( REQUEST, ++(session->thread_trace), protocol );
397 osrf_message_set_method(req_msg, method_name);
400 osrf_message_set_locale(req_msg, locale);
401 } else if (session->session_locale) {
402 osrf_message_set_locale(req_msg, session->session_locale);
406 osrf_message_set_params(req_msg, params);
412 for(i = 0; i!= param_strings->size ; i++ ) {
413 osrf_message_add_param(req_msg,
414 osrfStringArrayGetString(param_strings,i));
419 osrfAppRequest* req = _osrf_app_request_init( session, req_msg );
420 if(_osrf_app_session_send( session, req_msg ) ) {
421 osrfLogWarning( OSRF_LOG_MARK, "Error sending request message [%d]", session->thread_trace );
422 _osrf_app_request_free(req);
426 osrfLogDebug( OSRF_LOG_MARK, "Pushing [%d] onto request queue for session [%s] [%s]",
427 req->request_id, session->remote_service, session->session_id );
428 osrfListSet( session->request_queue, req, req->request_id );
429 return req->request_id;
432 void osrf_app_session_set_complete( osrfAppSession* session, int request_id ) {
436 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, request_id );
437 if(req) req->complete = 1;
440 int osrf_app_session_request_complete( const osrfAppSession* session, int request_id ) {
443 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, request_id );
445 return req->complete;
450 /** Resets the remote connection id to that of the original*/
451 void osrf_app_session_reset_remote( osrfAppSession* session ){
455 free(session->remote_id);
456 osrfLogDebug( OSRF_LOG_MARK, "App Session [%s] [%s] resetting remote id to %s",
457 session->remote_service, session->session_id, session->orig_remote_id );
459 session->remote_id = strdup(session->orig_remote_id);
462 void osrf_app_session_set_remote( osrfAppSession* session, const char* remote_id ) {
465 if( session->remote_id )
466 free(session->remote_id );
467 session->remote_id = strdup( remote_id );
470 /** pushes the given message into the result list of the app_request
471 with the given request_id */
472 int osrf_app_session_push_queue(
473 osrfAppSession* session, osrfMessage* msg ){
474 if(session == NULL || msg == NULL) return 0;
476 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, msg->thread_trace );
477 if(req == NULL) return 0;
478 _osrf_app_request_push_queue( req, msg );
483 int osrfAppSessionConnect( osrfAppSession* session ) {
484 return osrf_app_session_connect(session);
488 /** Attempts to connect to the remote service */
489 int osrf_app_session_connect(osrfAppSession* session){
494 if(session->state == OSRF_SESSION_CONNECTED) {
498 int timeout = 5; /* XXX CONFIG VALUE */
500 osrfLogDebug( OSRF_LOG_MARK, "AppSession connecting to %s", session->remote_id );
502 /* defaulting to protocol 1 for now */
503 osrfMessage* con_msg = osrf_message_init( CONNECT, session->thread_trace, 1 );
504 osrf_app_session_reset_remote( session );
505 session->state = OSRF_SESSION_CONNECTING;
506 int ret = _osrf_app_session_send( session, con_msg );
507 osrfMessageFree(con_msg);
510 time_t start = time(NULL);
511 time_t remaining = (time_t) timeout;
513 while( session->state != OSRF_SESSION_CONNECTED && remaining >= 0 ) {
514 osrf_app_session_queue_wait( session, remaining, NULL );
515 if(session->transport_error) {
516 osrfLogError(OSRF_LOG_MARK, "cannot communicate with %s", session->remote_service);
519 remaining -= (int) (time(NULL) - start);
522 if(session->state == OSRF_SESSION_CONNECTED)
523 osrfLogDebug( OSRF_LOG_MARK, " * Connected Successfully to %s", session->remote_service );
525 if(session->state != OSRF_SESSION_CONNECTED)
533 /** Disconnects from the remote service */
534 int osrf_app_session_disconnect( osrfAppSession* session){
538 if(session->state == OSRF_SESSION_DISCONNECTED)
541 if(session->stateless && session->state != OSRF_SESSION_CONNECTED) {
542 osrfLogDebug( OSRF_LOG_MARK,
543 "Exiting disconnect on stateless session %s",
544 session->session_id);
548 osrfLogDebug(OSRF_LOG_MARK, "AppSession disconnecting from %s", session->remote_id );
550 osrfMessage* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
551 _osrf_app_session_send( session, dis_msg );
552 session->state = OSRF_SESSION_DISCONNECTED;
554 osrfMessageFree( dis_msg );
555 osrf_app_session_reset_remote( session );
559 int osrf_app_session_request_resend( osrfAppSession* session, int req_id ) {
560 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, req_id );
561 return _osrf_app_request_resend( req );
565 static int osrfAppSessionSendBatch( osrfAppSession* session, osrfMessage* msgs[], int size ) {
567 if( !(session && msgs && size > 0) ) return 0;
570 osrfMessage* msg = msgs[0];
574 osrf_app_session_queue_wait( session, 0, NULL );
576 if(session->state != OSRF_SESSION_CONNECTED) {
578 if(session->stateless) { /* stateless session always send to the root listener */
579 osrf_app_session_reset_remote(session);
583 /* do an auto-connect if necessary */
584 if( ! session->stateless &&
585 (msg->m_type != CONNECT) &&
586 (msg->m_type != DISCONNECT) &&
587 (session->state != OSRF_SESSION_CONNECTED) ) {
589 if(!osrf_app_session_connect( session ))
596 char* string = osrfMessageSerializeBatch(msgs, size);
600 transport_message* t_msg = message_init(
601 string, "", session->session_id, session->remote_id, NULL );
602 message_set_osrf_xid( t_msg, osrfLogGetXid() );
604 retval = client_send_message( session->transport_handle, t_msg );
606 if( retval ) osrfLogError(OSRF_LOG_MARK, "client_send_message failed");
608 osrfLogInfo(OSRF_LOG_MARK, "[%s] sent %d bytes of data to %s",
609 session->remote_service, strlen(string), t_msg->recipient );
611 osrfLogDebug(OSRF_LOG_MARK, "Sent: %s", string );
614 message_free( t_msg );
622 static int _osrf_app_session_send( osrfAppSession* session, osrfMessage* msg ){
623 if( !(session && msg) ) return 0;
626 return osrfAppSessionSendBatch( session, a, 1 );
632 /** Waits up to 'timeout' seconds for some data to arrive.
633 * Any data that arrives will be processed according to its
634 * payload and message type. This method will return after
635 * any data has arrived.
637 int osrf_app_session_queue_wait( osrfAppSession* session, int timeout, int* recvd ){
638 if(session == NULL) return 0;
639 osrfLogDebug(OSRF_LOG_MARK, "AppSession in queue_wait with timeout %d", timeout );
640 return osrf_stack_entry_point(session->transport_handle, timeout, recvd);
643 /** Disconnects (if client) and removes the given session from the global session cache
644 * ! This free's all attached app_requests !
646 void osrfAppSessionFree( osrfAppSession* session ){
647 if(session == NULL) return;
649 osrfLogDebug(OSRF_LOG_MARK, "AppSession [%s] [%s] destroying self and deleting requests",
650 session->remote_service, session->session_id );
651 if(session->type == OSRF_SESSION_CLIENT
652 && session->state != OSRF_SESSION_DISCONNECTED ) { /* disconnect if we're a client */
653 osrfMessage* dis_msg = osrf_message_init( DISCONNECT, session->thread_trace, 1 );
654 _osrf_app_session_send( session, dis_msg );
655 osrfMessageFree(dis_msg);
658 osrfHashRemove( osrfAppSessionCache, session->session_id );
659 _osrf_app_session_free( session );
662 osrfMessage* osrfAppSessionRequestRecv(
663 osrfAppSession* session, int req_id, int timeout ) {
664 if(req_id < 0 || session == NULL)
666 osrfAppRequest* req = OSRF_LIST_GET_INDEX( session->request_queue, req_id );
667 return _osrf_app_request_recv( req, timeout );
672 int osrfAppRequestRespond( osrfAppSession* ses, int requestId, const jsonObject* data ) {
673 if(!ses || ! data ) return -1;
675 osrfMessage* msg = osrf_message_init( RESULT, requestId, 1 );
676 osrf_message_set_status_info( msg, NULL, "OK", OSRF_STATUS_OK );
677 char* json = jsonObjectToJSON( data );
679 osrf_message_set_result_content( msg, json );
680 _osrf_app_session_send( ses, msg );
683 osrfMessageFree( msg );
689 int osrfAppRequestRespondComplete(
690 osrfAppSession* ses, int requestId, const jsonObject* data ) {
692 osrfMessage* payload = osrf_message_init( RESULT, requestId, 1 );
693 osrf_message_set_status_info( payload, NULL, "OK", OSRF_STATUS_OK );
695 osrfMessage* status = osrf_message_init( STATUS, requestId, 1);
696 osrf_message_set_status_info( status, "osrfConnectStatus", "Request Complete", OSRF_STATUS_COMPLETE );
699 char* json = jsonObjectToJSON( data );
700 osrf_message_set_result_content( payload, json );
707 osrfAppSessionSendBatch( ses, ms, 2 );
709 osrfAppSessionSendBatch( ses, &status, 1 );
712 osrfMessageFree( payload );
713 osrfMessageFree( status );
718 int osrfAppSessionStatus( osrfAppSession* ses, int type,
719 const char* name, int reqId, const char* message ) {
722 osrfMessage* msg = osrf_message_init( STATUS, reqId, 1);
723 osrf_message_set_status_info( msg, name, message, type );
724 _osrf_app_session_send( ses, msg );
725 osrfMessageFree( msg );