src/srfsh/srfsh.c

   1 #include "srfsh.h"
   2
   3 int main( int argc, char* argv[] ) {
   4
   5
   6
   7         /* --------------------------------------------- */
   8         if( argc < 2 ) {
   9
  10                 /* see if they have a .srfsh.xml in their home directory */
  11                 char* home = getenv("HOME");
  12                 int l = strlen(home) + 36;
  13                 char fbuf[l];
  14                 memset(fbuf, 0, l);
  15                 sprintf(fbuf,"%s/.srfsh.xml",home);
  16
  17                 if(!access(fbuf, R_OK)) {
  18                         if( ! osrf_system_bootstrap_client(fbuf) )
  19                                 fatal_handler( "Unable to bootstrap client for requests");
  20
  21                 } else {
  22                         fatal_handler( "No Config file found at %s and none specified. "
  23                                         "\nusage: %s <config_file>", fbuf, argv[0] );
  24                 }
  25
  26         } else {
  27                 if( ! osrf_system_bootstrap_client(argv[1]) )
  28                         fatal_handler( "Unable to bootstrap client for requests");
  29         }
  30         /* --------------------------------------------- */
  31         load_history();
  32
  33
  34         client = osrf_system_get_transport_client();
  35
  36
  37         /* main process loop */
  38         char* request;
  39         while((request=readline(prompt))) {
  40
  41                 if( !strcmp(request, "exit") || !strcmp(request,"quit"))
  42                         break;
  43
  44                 char* req_copy = strdup(request);
  45
  46                 parse_request( req_copy );
  47                 if( request && strlen(request) > 2 ) {
  48                         add_history(request);
  49                 }
  50
  51                 free(request);
  52                 free(req_copy);
  53         }
  54
  55         if(history_file != NULL )
  56                 write_history(history_file);
  57         free(request);
  58         client_disconnect( client );
  59         client_free( client );
  60         config_reader_free();
  61         log_free();
  62
  63         return 0;
  64 }
  65
  66 void sig_child_handler( int s ) {
  67         child_dead = 1;
  68 }
  69
  70
  71 int load_history() {
  72
  73         char* home = getenv("HOME");
  74         int l = strlen(home) + 24;
  75         char fbuf[l];
  76
  77         memset(fbuf, 0, l);
  78         sprintf(fbuf,"%s/.srfsh_history",home);
  79         history_file = strdup(fbuf);
  80
  81         if(!access(history_file, W_OK | R_OK )) {
  82                 //set_history_length(999);
  83                 history_length = 999;
  84                 read_history(history_file);
  85         }
  86         return 1;
  87 }
  88
  89
  90 int parse_error( char* words[] ) {
  91
  92         if( ! words )
  93                 return 0;
  94
  95         int i = 0;
  96         char* current;
  97         char buffer[256];
  98         memset(buffer, 0, 256);
  99         while( (current=words[i++]) ) {
 100                 strcat(buffer, current);
 101                 strcat(buffer, " ");
 102         }
 103         if( ! buffer || strlen(buffer) < 1 )
 104                 printf("\n");
 105
 106         fprintf( stderr, "???: %s\n", buffer );
 107         return 0;
 108
 109 }
 110
 111
 112 int parse_request( char* request ) {
 113
 114         if( request == NULL )
 115                 return 0;
 116
 117         int ret_val = 0;
 118         int i = 0;
 119         char* words[COMMAND_BUFSIZE];
 120         memset(words,0,COMMAND_BUFSIZE);
 121         char* req = request;
 122
 123         char* cur_tok = strtok( req, " " );
 124
 125         if( cur_tok == NULL )
 126                 return 0;
 127
 128         while(cur_tok != NULL) {
 129                 words[i++] = cur_tok;
 130                 cur_tok = strtok( NULL, " " );
 131         }
 132
 133
 134         // not sure why (strtok?), but this is necessary
 135         memset( words + i, 0, COMMAND_BUFSIZE - i );
 136
 137         /* pass off to the top level command */
 138         if( !strcmp(words[0],"router") )
 139                 ret_val = handle_router( words );
 140
 141         else if( !strcmp(words[0],"time") )
 142                 ret_val = handle_time( words );
 143
 144         else if (!strcmp(words[0],"request"))
 145                 ret_val = handle_request( words, 0 );
 146
 147         else if (!strcmp(words[0],"relay"))
 148                 ret_val = handle_request( words, 1 );
 149
 150         else if (!strcmp(words[0],"help"))
 151                 ret_val = print_help();
 152
 153         else if (!strcmp(words[0],"set"))
 154                 ret_val = handle_set(words);
 155
 156         else if (!strcmp(words[0],"print"))
 157                 ret_val = handle_print(words);
 158
 159         else if (words[0][0] == '!')
 160                 ret_val = handle_exec( words );
 161
 162         if(!ret_val)
 163                 return parse_error( words );
 164
 165         return 1;
 166
 167 }
 168
 169 int handle_set( char* words[]) {
 170
 171         char* variable;
 172         if( (variable=words[1]) ) {
 173
 174                 char* val;
 175                 if( (val=words[2]) ) {
 176
 177                         if(!strcmp(variable,"pretty_print")) {
 178                                 if(!strcmp(val,"true")) {
 179                                         pretty_print = 1;
 180                                         printf("pretty_print = true\n");
 181                                         return 1;
 182                                 }
 183                                 if(!strcmp(val,"false")) {
 184                                         pretty_print = 0;
 185                                         printf("pretty_print = false\n");
 186                                         return 1;
 187                                 }
 188                         }
 189                 }
 190         }
 191
 192         return 0;
 193 }
 194
 195
 196 int handle_print( char* words[]) {
 197
 198         char* variable;
 199         if( (variable=words[1]) ) {
 200                 if(!strcmp(variable,"pretty_print")) {
 201                         if(pretty_print) {
 202                                 printf("pretty_print = true\n");
 203                                 return 1;
 204                         } else {
 205                                 printf("pretty_print = false\n");
 206                                 return 1;
 207                         }
 208                 }
 209         }
 210         return 0;
 211 }
 212
 213 int handle_router( char* words[] ) {
 214
 215         if(!client)
 216                 return 1;
 217
 218         int i;
 219
 220         if( words[1] ) {
 221                 if( !strcmp(words[1],"query") ) {
 222
 223                         if( words[2] && !strcmp(words[2],"servers") ) {
 224                                 for(i=3; i < COMMAND_BUFSIZE - 3 && words[i]; i++ ) {
 225                                         router_query_servers( words[i] );
 226                                 }
 227                                 return 1;
 228                         }
 229                         return 0;
 230                 }
 231                 return 0;
 232         }
 233         return 0;
 234 }
 235
 236
 237 int handle_exec(char* words[]) {
 238
 239         int len = strlen(words[0]);
 240         char command[len];
 241         memset(command,0,len);
 242
 243         int i; /* chop out the ! */
 244         for( i=1; i!= len; i++) {
 245                 command[i-1] = words[0][i];
 246         }
 247
 248         free(words[0]);
 249         words[0] = strdup(command);
 250         signal(SIGCHLD,sig_child_handler);
 251         if(fork()) {
 252                 while(1) {
 253                         sleep(100);
 254                         if(child_dead) {
 255                                 signal(SIGCHLD,sig_child_handler);
 256                                 child_dead = 0;
 257                                 break;
 258                         }
 259                 }
 260         } else {
 261                 execvp( words[0], words );
 262                 exit(0);
 263         }
 264         return 1;
 265 }
 266
 267
 268 int handle_request( char* words[], int relay ) {
 269
 270         if(!client)
 271                 return 1;
 272
 273         if(words[1]) {
 274                 char* server = words[1];
 275                 char* method = words[2];
 276                 int i;
 277                 growing_buffer* buffer = NULL;
 278                 if(!relay) {
 279                         buffer = buffer_init(128);
 280                         buffer_add(buffer, "[");
 281                         for(i = 3; words[i] != NULL; i++ ) {
 282                                 /* removes trailing semicolon if user accidentally enters it */
 283                                 if( words[i][strlen(words[i])-1] == ';' )
 284                                         words[i][strlen(words[i])-1] = '\0';
 285                                 buffer_add( buffer, words[i] );
 286                                 buffer_add(buffer, " ");
 287                         }
 288                         buffer_add(buffer, "]");
 289                 }
 290
 291                 return send_request( server, method, buffer, relay );
 292         }
 293
 294         return 0;
 295 }
 296
 297 int send_request( char* server,
 298                 char* method, growing_buffer* buffer, int relay ) {
 299         if( server == NULL || method == NULL )
 300                 return 0;
 301
 302         json* params = NULL;
 303         if( !relay ) {
 304                 if( buffer != NULL && buffer->n_used > 0 )
 305                         params = json_tokener_parse(buffer->buf);
 306         } else {
 307                 if(!last_result || ! last_result->result_content) {
 308                         printf("We're not going to call 'relay' with no result params\n");
 309                         return 1;
 310                 }
 311                 else {
 312                         json* arr = json_object_new_array();
 313                         json_object_array_add( arr, last_result->result_content );
 314                         params = arr;
 315                 }
 316         }
 317
 318         osrf_app_session* session = osrf_app_client_session_init(server);
 319         double start = get_timestamp_millis();
 320
 321         if(!osrf_app_session_connect(session)) {
 322                 warning_handler( "Unable to connect to remote service %s\n", server );
 323                 return 1;
 324         }
 325
 326         int req_id = osrf_app_session_make_request( session, params, method, 1 );
 327
 328         osrf_message* omsg = osrf_app_session_request_recv( session, req_id, 8 );
 329
 330         if(!omsg)
 331                 printf("\nReceived no data from server\n");
 332
 333
 334         signal(SIGPIPE, SIG_IGN);
 335
 336         FILE* less = popen( "less -EX", "w");
 337         if( less == NULL ) { less = stdout; }
 338
 339         while(omsg) {
 340
 341                 if(omsg->result_content) {
 342
 343                         osrf_message_free(last_result);
 344                         last_result = omsg;
 345
 346                         if( pretty_print ) {
 347                                 char* content = json_printer( omsg->result_content );
 348                                 fprintf( less, "\nReceived Data: %s\n",content );
 349                                 free(content);
 350                         } else {
 351                                 fprintf( less, "\nReceived Data: %s\n",
 352                                         json_object_to_json_string(omsg->result_content));
 353                         }
 354
 355                 } else {
 356
 357                         fprintf( less, "\nReceived Exception:\nName: %s\nStatus: "
 358                                         "%s\nStatusCode %d\n", omsg->status_name,
 359                                         omsg->status_text, omsg->status_code );
 360                 }
 361
 362                 omsg = osrf_app_session_request_recv( session, req_id, 5 );
 363         }
 364
 365
 366         double end = get_timestamp_millis();
 367
 368         fprintf( less, "\n------------------------------------\n");
 369         if( osrf_app_session_request_complete( session, req_id ))
 370                 fprintf(less, "Request Completed Successfully\n");
 371
 372
 373         fprintf(less, "Request Time in seconds: %.3f\n", end - start );
 374         fprintf(less, "------------------------------------\n");
 375
 376         osrf_app_session_request_finish( session, req_id );
 377         osrf_app_session_disconnect( session );
 378         osrf_app_session_destroy( session );
 379
 380         pclose(less);
 381
 382         return 1;
 383
 384
 385 }
 386
 387 int handle_time( char* words[] ) {
 388
 389         if( ! words[1] ) {
 390
 391                 char buf[36];
 392                 memset(buf,0,36);
 393                 get_timestamp(buf);
 394                 printf( "%s\n", buf );
 395                 return 1;
 396         }
 397
 398         if( words[1] ) {
 399                 time_t epoch = (time_t)atoi( words[1] );
 400                 char* localtime = strdup( ctime( &epoch ) );
 401                 printf( "%s => %s", words[1], localtime );
 402                 free(localtime);
 403                 return 1;
 404         }
 405
 406         return 0;
 407
 408 }
 409
 410
 411
 412 int router_query_servers( char* router_server ) {
 413
 414         if( ! router_server || strlen(router_server) == 0 )
 415                 return 0;
 416
 417         char rbuf[256];
 418         memset(rbuf,0,256);
 419         sprintf(rbuf,"router@%s/router", router_server );
 420
 421         transport_message* send =
 422                 message_init( "servers", NULL, NULL, rbuf, NULL );
 423         message_set_router_info( send, NULL, NULL, NULL, "query", 0 );
 424
 425         client_send_message( client, send );
 426         message_free( send );
 427
 428         transport_message* recv = client_recv( client, -1 );
 429         if( recv == NULL ) {
 430                 fprintf(stderr, "NULL message received from router\n");
 431                 return 1;
 432         }
 433
 434         printf(
 435                         "---------------------------------------------------------------------------------\n"
 436                         "Received from 'server' query on %s\n"
 437                         "---------------------------------------------------------------------------------\n"
 438                         "original reg time | latest reg time | last used time | class | server\n"
 439                         "---------------------------------------------------------------------------------\n"
 440                         "%s"
 441                         "---------------------------------------------------------------------------------\n"
 442                         , router_server, recv->body );
 443
 444         message_free( recv );
 445
 446         return 1;
 447 }
 448
 449 int print_help() {
 450
 451         printf(
 452                         "---------------------------------------------------------------------------------\n"
 453                         "Commands:\n"
 454                         "---------------------------------------------------------------------------------\n"
 455                         "help                   - Display this message\n"
 456                         "!<command> [args] - Forks and runs the given command in the shell\n"
 457                         "time                   - Prints the current time\n"
 458                         "time <timestamp>       - Formats seconds since epoch into readable format\n"
 459                         "set <variable> <value> - set a srfsh variable (e.g. set pretty_print true )\n"
 460                         "print <variable>               - Displays the value of a srfsh variable\n"
 461                         "---------------------------------------------------------------------------------\n"
 462                         "router query servers <server1 [, server2, ...]>\n"
 463                         "       - Returns stats on connected services\n"
 464                         "\n"
 465                         "request <service> <method> [ <json formatted string of params> ]\n"
 466                         "       - Anything passed in will be wrapped in a json array,\n"
 467                         "               so add commas if there is more than one param\n"
 468                         "\n"
 469                         "relay <service> <method>\n"
 470                         "       - Performs the requested query using the last received result as the param\n"
 471                         "---------------------------------------------------------------------------------\n"
 472                         );
 473
 474         return 1;
 475 }
 476
 477
 478
 479 char* tabs(int count) {
 480         growing_buffer* buf = buffer_init(24);
 481         int i;
 482         for(i=0;i!=count;i++)
 483                 buffer_add(buf, "   ");
 484
 485         char* final = buffer_data( buf );
 486         buffer_free( buf );
 487         return final;
 488 }
 489
 490 char* json_printer( json* object ) {
 491
 492         if(object == NULL)
 493                 return NULL;
 494         char* string = json_object_to_json_string(object);
 495
 496         growing_buffer* buf = buffer_init(64);
 497         int i;
 498         int tab_var = 0;
 499         for(i=0; i!= strlen(string); i++) {
 500
 501                 if( string[i] == '{' ) {
 502
 503                         buffer_add(buf, "\n");
 504                         char* tab = tabs(tab_var);
 505                         buffer_add(buf, tab);
 506                         free(tab);
 507                         buffer_add( buf, "{");
 508                         tab_var++;
 509                         buffer_add( buf, "\n" );
 510                         tab = tabs(tab_var);
 511                         buffer_add( buf, tab );
 512                         free(tab);
 513
 514                 } else if( string[i] == '[' ) {
 515
 516                         buffer_add(buf, "\n");
 517                         char* tab = tabs(tab_var);
 518                         buffer_add(buf, tab);
 519                         free(tab);
 520                         buffer_add( buf, "[");
 521                         tab_var++;
 522                         buffer_add( buf, "\n" );
 523                         tab = tabs(tab_var);
 524                         buffer_add( buf, tab );
 525                         free(tab);
 526
 527                 } else if( string[i] == '}' ) {
 528
 529                         tab_var--;
 530                         buffer_add(buf, "\n");
 531                         char* tab = tabs(tab_var);
 532                         buffer_add(buf, tab);
 533                         free(tab);
 534                         buffer_add( buf, "}");
 535                         buffer_add( buf, "\n" );
 536                         tab = tabs(tab_var);
 537                         buffer_add( buf, tab );
 538                         free(tab);
 539
 540                 } else if( string[i] == ']' ) {
 541
 542                         tab_var--;
 543                         buffer_add(buf, "\n");
 544                         char* tab = tabs(tab_var);
 545                         buffer_add(buf, tab);
 546                         free(tab);
 547                         buffer_add( buf, "]");
 548                         buffer_add( buf, "\n" );
 549                         tab = tabs(tab_var);
 550                         buffer_add( buf, tab );
 551                         free(tab);
 552
 553                 } else if( string[i] == ',' ) {
 554
 555 //                      tab_var--;
 556 //                      buffer_add(buf, "\n");
 557                         buffer_add( buf, ",");
 558                         buffer_add( buf, "\n" );
 559                         char* tab = tabs(tab_var);
 560                         buffer_add(buf, tab);
 561                         free(tab);
 562 //                      tab = tabs(tab_var);
 563 //                      buffer_add( buf, tab );
 564 //                      free(tab);
 565
 566                 } else {
 567
 568                         char b[2];
 569                         b[0] = string[i];
 570                         b[1] = '\0';
 571                         buffer_add( buf, b );
 572                 }
 573
 574         }
 575
 576         char* result = buffer_data(buf);
 577         buffer_free(buf);
 578         return result;
 579
 580 }