src/libstack/osrf_stack.c

   1 #include "opensrf/osrf_stack.h"
   2
   3 osrf_message* _do_client( osrf_app_session*, osrf_message* );
   4 osrf_message* _do_server( osrf_app_session*, osrf_message* );
   5
   6 int osrf_stack_process( transport_client* client, int timeout ) {
   7         transport_message* msg = client_recv( client, timeout );
   8         if(msg == NULL) return 0;
   9         return osrf_stack_transport_handler( msg );
  10 }
  11
  12
  13
  14 // -----------------------------------------------------------------------------
  15 // Entry point into the stack
  16 // -----------------------------------------------------------------------------
  17 int osrf_stack_transport_handler( transport_message* msg ) {
  18
  19         debug_handler( "Transport handler received new message \nfrom %s "
  20                         "to %s with body \n\n%s\n", msg->sender, msg->recipient, msg->body );
  21
  22         osrf_app_session* session = osrf_app_session_find_session( msg->thread );
  23
  24         if( session == NULL ) {  /* we must be a server, build a new session */
  25                 info_handler( "Server sessions not implemented yet ..." );
  26                 return 0;
  27         }
  28
  29         osrf_app_session_set_remote( session, msg->sender );
  30         osrf_message* arr[OSRF_MAX_MSGS_PER_PACKET];
  31         memset(arr, 0, OSRF_MAX_MSGS_PER_PACKET );
  32         int num_msgs = osrf_message_from_xml( msg->body, arr );
  33
  34         /* XXX ERROR CHECKING, BAD XML, ETC... */
  35         int i;
  36         for( i = 0; i != num_msgs; i++ ) {
  37                 osrf_stack_message_handler( session, arr[i] );
  38         }
  39
  40         return 1;
  41 }
  42
  43 int osrf_stack_message_handler( osrf_app_session* session, osrf_message* msg ) {
  44         if(session == NULL || msg == NULL)
  45                 return 0;
  46
  47         osrf_message* ret_msg = NULL;
  48         if( session->type ==  OSRF_SESSION_CLIENT )
  49                  ret_msg = _do_client( session, msg );
  50         else
  51                 ret_msg= _do_server( session, msg );
  52
  53         if(ret_msg)
  54                 osrf_stack_application_handler( session, ret_msg );
  55
  56         return 1;
  57
  58 }
  59
  60 /** If we return a message, that message should be passed up the stack,
  61   * if we return NULL, we're finished for now...
  62   */
  63 osrf_message* _do_client( osrf_app_session* session, osrf_message* msg ) {
  64         if(session == NULL || msg == NULL)
  65                 return NULL;
  66
  67         osrf_message* new_msg;
  68
  69         if( msg->m_type == STATUS ) {
  70
  71                 switch( msg->status_code ) {
  72
  73                         case OSRF_STATUS_OK:
  74                                 session->state = OSRF_SESSION_CONNECTED;
  75                                 return NULL;
  76
  77                         case OSRF_STATUS_COMPLETE:
  78                                 osrf_app_session_set_complete( session, msg->thread_trace );
  79                                 return NULL;
  80
  81                         case OSRF_STATUS_REDIRECTED:
  82                                 osrf_app_session_reset_remote( session );
  83                                 session->state = OSRF_SESSION_DISCONNECTED;
  84                                 osrf_app_session_request_resend( session, msg->thread_trace );
  85                                 return NULL;
  86
  87                         case OSRF_STATUS_EXPFAILED:
  88                                 osrf_app_session_reset_remote( session );
  89                                 session->state = OSRF_SESSION_DISCONNECTED;
  90                                 osrf_app_session_request_resend( session, msg->thread_trace );
  91                                 return NULL;
  92
  93                         case OSRF_STATUS_INTERNALSERVERERROR: /*XXX we need to propogate these... */
  94                                 /*
  95                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
  96                                 osrf_message_set_status_info( new_msg,
  97                                                 msg->status_name, msg->status_text, msg->status_code );
  98                                 osrf_message_set_result_content( new_msg, json_object_new_string("HELP") );
  99                                 warning_handler( "Received an INTERNAL SERVER ERROR from the server for tt %d",
 100                                                 msg->thread_trace);
 101                                 return new_msg;
 102                                 */
 103                                 return NULL;
 104
 105                         case OSRF_STATUS_TIMEOUT:
 106                                 osrf_app_session_reset_remote( session );
 107                                 session->state = OSRF_SESSION_DISCONNECTED;
 108                                 osrf_app_session_request_resend( session, msg->thread_trace );
 109                                 return NULL;
 110
 111
 112                         default:
 113                                 new_msg = osrf_message_init( RESULT, msg->thread_trace, msg->protocol );
 114                                 osrf_message_set_status_info( new_msg,
 115                                                 msg->status_name, msg->status_text, msg->status_code );
 116                                 warning_handler("The stack doesn't know what to do with "
 117                                                 "the provided message code: %d, name %s. Passing UP.",
 118                                                 msg->status_code, msg->status_name );
 119                                 new_msg->is_exception = 1;
 120                                 osrf_app_session_set_complete( session, msg->thread_trace );
 121                                 osrf_message_free(msg);
 122                                 return new_msg;
 123                 }
 124
 125                 return NULL;
 126
 127         } else if( msg->m_type == RESULT )
 128                 return msg;
 129
 130         return NULL;
 131
 132 }
 133
 134
 135 /** If we return a message, that message should be passed up the stack,
 136   * if we return NULL, we're finished for now...
 137   */
 138 osrf_message* _do_server( osrf_app_session* session, osrf_message* msg ) {
 139         if(session == NULL || msg == NULL)
 140                 return NULL;
 141
 142         warning_handler( "We dont' do servers yet !!" );
 143
 144         return msg;
 145 }
 146
 147
 148
 149
 150 int osrf_stack_application_handler( osrf_app_session* session, osrf_message* msg ) {
 151         if(session == NULL || msg == NULL)
 152                 return 0;
 153
 154         if(msg->m_type == RESULT) {
 155                 osrf_app_session_push_queue( session, msg );
 156                 return 1;
 157         }
 158
 159         warning_handler( "application_handler can't handle whatever you sent, type %d", msg->m_type);
 160
 161         return 1;
 162
 163 }