OpenSRF/src/srfsh/srfsh.c

   1 #include "srfsh.h"
   2
   3
   4 int main( int argc, char* argv[] ) {
   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                                 buffer_add( buffer, words[i] );
 283                                 buffer_add(buffer, " ");
 284                         }
 285                         buffer_add(buffer, "]");
 286                 }
 287
 288                 return send_request( server, method, buffer, relay );
 289         }
 290
 291         return 0;
 292 }
 293
 294 int send_request( char* server,
 295                 char* method, growing_buffer* buffer, int relay ) {
 296         if( server == NULL || method == NULL )
 297                 return 0;
 298
 299         json* params = NULL;
 300         if( !relay ) {
 301                 if( buffer != NULL && buffer->n_used > 0 )
 302                         params = json_tokener_parse(buffer->buf);
 303         } else {
 304                 if(!last_result->result_content) {
 305                         warning_handler("We're not going to call 'relay' on empty result");
 306                         return 1;
 307                 }
 308                 else {
 309                         json* arr = json_object_new_array();
 310                         json_object_array_add( arr, last_result->result_content );
 311                         params = arr;
 312                 }
 313         }
 314
 315         osrf_app_session* session = osrf_app_client_session_init(server);
 316         double start = get_timestamp_millis();
 317
 318         if(!osrf_app_session_connect(session)) {
 319                 warning_handler( "Unable to connect to remote service %s\n", server );
 320                 return 1;
 321         }
 322
 323         int req_id = osrf_app_session_make_request( session, params, method, 1 );
 324
 325         osrf_message* omsg = osrf_app_session_request_recv( session, req_id, 8 );
 326
 327         if(!omsg)
 328                 printf("\nReceived no data from server\n");
 329
 330
 331         while(omsg) {
 332
 333                 if(omsg->result_content) {
 334
 335                         osrf_message_free(last_result);
 336                         last_result = omsg;
 337
 338                         if( pretty_print ) {
 339                                 char* content = json_printer( omsg->result_content );
 340                                 printf( "\nReceived Data: %s\n",content );
 341                                 free(content);
 342                         } else {
 343                                 printf( "\nReceived Data: %s\n",
 344                                         json_object_to_json_string(omsg->result_content));
 345                         }
 346
 347                 } else {
 348
 349                         printf( "\nReceived Exception:\nName: %s\nStatus: "
 350                                         "%s\nStatusCode %d\n", omsg->status_name,
 351                                         omsg->status_text, omsg->status_code );
 352                 }
 353
 354                 omsg = osrf_app_session_request_recv( session, req_id, 5 );
 355         }
 356
 357         double end = get_timestamp_millis();
 358
 359         printf("\n------------------------------------\n");
 360         if( osrf_app_session_request_complete( session, req_id ))
 361                 printf("Request Completed Successfully\n");
 362
 363
 364         printf("Request Time in seconds: %f\n", end - start );
 365         printf("------------------------------------\n");
 366
 367         osrf_app_session_request_finish( session, req_id );
 368         osrf_app_session_disconnect( session );
 369         osrf_app_session_destroy( session );
 370
 371         return 1;
 372
 373
 374 }
 375
 376 int handle_time( char* words[] ) {
 377
 378         if( ! words[1] ) {
 379
 380                 char buf[36];
 381                 memset(buf,0,36);
 382                 get_timestamp(buf);
 383                 printf( "%s\n", buf );
 384                 return 1;
 385         }
 386
 387         if( words[1] ) {
 388                 time_t epoch = (time_t)atoi( words[1] );
 389                 char* localtime = strdup( ctime( &epoch ) );
 390                 printf( "%s => %s", words[1], localtime );
 391                 free(localtime);
 392                 return 1;
 393         }
 394
 395         return 0;
 396
 397 }
 398
 399
 400
 401 int router_query_servers( char* router_server ) {
 402
 403         if( ! router_server || strlen(router_server) == 0 )
 404                 return 0;
 405
 406         char rbuf[256];
 407         memset(rbuf,0,256);
 408         sprintf(rbuf,"router@%s/router", router_server );
 409
 410         transport_message* send =
 411                 message_init( "servers", NULL, NULL, rbuf, NULL );
 412         message_set_router_info( send, NULL, NULL, NULL, "query", 0 );
 413
 414         client_send_message( client, send );
 415         message_free( send );
 416
 417         transport_message* recv = client_recv( client, -1 );
 418         if( recv == NULL ) {
 419                 fprintf(stderr, "NULL message received from router\n");
 420                 return 1;
 421         }
 422
 423         printf(
 424                         "---------------------------------------------------------------------------------\n"
 425                         "Received from 'server' query on %s\n"
 426                         "---------------------------------------------------------------------------------\n"
 427                         "original reg time | latest reg time | last used time | class | server\n"
 428                         "---------------------------------------------------------------------------------\n"
 429                         "%s"
 430                         "---------------------------------------------------------------------------------\n"
 431                         , router_server, recv->body );
 432
 433         message_free( recv );
 434
 435         return 1;
 436 }
 437
 438 int print_help() {
 439
 440         printf(
 441                         "---------------------------------------------------------------------------------\n"
 442                         "Commands:\n"
 443                         "---------------------------------------------------------------------------------\n"
 444                         "help                   - Display this message\n"
 445                         "!<command> [args] - Forks and runs the given command in the shell\n"
 446                         "time                   - Prints the current time\n"
 447                         "time <timestamp>       - Formats seconds since epoch into readable format\n"
 448                         "set <variable> <value> - set a srfsh variable (e.g. set pretty_print true )\n"
 449                         "print <variable>               - Displays the value of a srfsh variable\n"
 450                         "---------------------------------------------------------------------------------\n"
 451                         "router query servers <server1 [, server2, ...]>\n"
 452                         "       - Returns stats on connected services\n"
 453                         "\n"
 454                         "request <service> <method> [ <json formatted string of params> ]\n"
 455                         "       - Anything passed in will be wrapped in a json array,\n"
 456                         "               so add commas if there is more than one param\n"
 457                         "\n"
 458                         "relay <service> <method>\n"
 459                         "       - Performs the requested query using the last received result as the param\n"
 460                         "---------------------------------------------------------------------------------\n"
 461                         );
 462
 463         return 1;
 464 }
 465
 466
 467
 468 char* tabs(int count) {
 469         growing_buffer* buf = buffer_init(24);
 470         int i;
 471         for(i=0;i!=count;i++)
 472                 buffer_add(buf, "   ");
 473
 474         char* final = buffer_data( buf );
 475         buffer_free( buf );
 476         return final;
 477 }
 478
 479 char* json_printer( json* object ) {
 480
 481         if(object == NULL)
 482                 return NULL;
 483         char* string = json_object_to_json_string(object);
 484
 485         growing_buffer* buf = buffer_init(64);
 486         int i;
 487         int tab_var = 0;
 488         for(i=0; i!= strlen(string); i++) {
 489
 490                 if( string[i] == '{' ) {
 491
 492                         buffer_add(buf, "\n");
 493                         char* tab = tabs(tab_var);
 494                         buffer_add(buf, tab);
 495                         free(tab);
 496                         buffer_add( buf, "{");
 497                         tab_var++;
 498                         buffer_add( buf, "\n" );
 499                         tab = tabs(tab_var);
 500                         buffer_add( buf, tab );
 501                         free(tab);
 502
 503                 } else if( string[i] == '[' ) {
 504
 505                         buffer_add(buf, "\n");
 506                         char* tab = tabs(tab_var);
 507                         buffer_add(buf, tab);
 508                         free(tab);
 509                         buffer_add( buf, "[");
 510                         tab_var++;
 511                         buffer_add( buf, "\n" );
 512                         tab = tabs(tab_var);
 513                         buffer_add( buf, tab );
 514                         free(tab);
 515
 516                 } else if( string[i] == '}' ) {
 517
 518                         tab_var--;
 519                         buffer_add(buf, "\n");
 520                         char* tab = tabs(tab_var);
 521                         buffer_add(buf, tab);
 522                         free(tab);
 523                         buffer_add( buf, "}");
 524                         buffer_add( buf, "\n" );
 525                         tab = tabs(tab_var);
 526                         buffer_add( buf, tab );
 527                         free(tab);
 528
 529                 } else if( string[i] == ']' ) {
 530
 531                         tab_var--;
 532                         buffer_add(buf, "\n");
 533                         char* tab = tabs(tab_var);
 534                         buffer_add(buf, tab);
 535                         free(tab);
 536                         buffer_add( buf, "]");
 537                         buffer_add( buf, "\n" );
 538                         tab = tabs(tab_var);
 539                         buffer_add( buf, tab );
 540                         free(tab);
 541
 542                 } else {
 543                         char b[2];
 544                         b[0] = string[i];
 545                         b[1] = '\0';
 546                         buffer_add( buf, b );
 547                 }
 548
 549         }
 550
 551         char* result = buffer_data(buf);
 552         buffer_free(buf);
 553         return result;
 554
 555 }