src/srfsh/srfsh.c

   1 #include "opensrf/transport_client.h"
   2 #include "opensrf/generic_utils.h"
   3 #include "opensrf/osrf_message.h"
   4 #include "opensrf/osrf_app_session.h"
   5 #include <time.h>
   6
   7 #include <signal.h>
   8
   9 #include <stdio.h>
  10 #include <readline/readline.h>
  11 #include <readline/history.h>
  12
  13
  14 #define SRFSH_PORT 5222
  15 #define COMMAND_BUFSIZE 12
  16
  17 /* shell prompt */
  18 char* prompt = "srfsh# ";
  19
  20 int child_dead = 0;
  21
  22 /* true if we're pretty printing json results */
  23 int pretty_print = 0;
  24
  25 /* our jabber connection */
  26 transport_client* client = NULL;
  27
  28 /* the last result we received */
  29 osrf_message* last_result = NULL;
  30
  31 /* functions */
  32 int parse_request( char* request );
  33 int handle_router( char* words[] );
  34 int handle_time( char* words[] );
  35 int handle_request( char* words[], int relay );
  36 int handle_exec(char* words[]);
  37 int handle_set( char* words[]);
  38 int handle_print( char* words[]);
  39 int send_request( char* server,
  40                 char* method, growing_buffer* buffer, int relay );
  41 int parse_error( char* words[] );
  42 int router_query_servers( char* server );
  43 int srfsh_client_connect();
  44 int print_help();
  45 char* json_printer( json* object );
  46 char* tabs(int count);
  47 /* --------- */
  48 void sig_child_handler( int s );
  49
  50
  51
  52
  53 int main( int argc, char* argv[] ) {
  54
  55
  56         if( argc < 2 ) {
  57
  58                 /* see if they have a .srfsh.xml in their home directory */
  59                 char* home = getenv("HOME");
  60                 int l = strlen(home) + 36;
  61                 char fbuf[l];
  62                 memset(fbuf, 0, l);
  63                 sprintf(fbuf,"%s/.srfsh.xml",home);
  64
  65                 if(!access(fbuf, F_OK)) {
  66                         if( ! osrf_system_bootstrap_client(fbuf) )
  67                                 fatal_handler( "Unable to bootstrap client for requests");
  68
  69                 } else {
  70                         fatal_handler( "No Config file found at %s and none specified. "
  71                                         "\nusage: %s <config_file>", fbuf, argv[0] );
  72                 }
  73
  74         } else {
  75                 if( ! osrf_system_bootstrap_client(argv[1]) )
  76                         fatal_handler( "Unable to bootstrap client for requests");
  77         }
  78
  79         client = osrf_system_get_transport_client();
  80
  81
  82         /* main process loop */
  83         char* request;
  84         while((request=readline(prompt))) {
  85
  86                 if( !strcmp(request, "exit") || !strcmp(request,"quit"))
  87                         break;
  88
  89                 char* req_copy = strdup(request);
  90
  91                 parse_request( req_copy );
  92                 add_history(request);
  93
  94                 free(request);
  95                 free(req_copy);
  96         }
  97
  98         free(request);
  99         client_disconnect( client );
 100         client_free( client );
 101         config_reader_free();
 102         log_free();
 103
 104         return 0;
 105 }
 106
 107 void sig_child_handler( int s ) {
 108         child_dead = 1;
 109 }
 110
 111 int parse_error( char* words[] ) {
 112
 113         if( ! words )
 114                 return 0;
 115
 116         int i = 0;
 117         char* current;
 118         char buffer[256];
 119         memset(buffer, 0, 256);
 120         while( (current=words[i++]) ) {
 121                 strcat(buffer, current);
 122                 strcat(buffer, " ");
 123         }
 124         if( ! buffer || strlen(buffer) < 1 )
 125                 printf("\n");
 126
 127         fprintf( stderr, "Command Incomplete or Not Recognized: %s\n", buffer );
 128         return 0;
 129
 130 }
 131
 132
 133 int parse_request( char* request ) {
 134
 135         if( request == NULL )
 136                 return 0;
 137
 138         int ret_val = 0;
 139         int i = 0;
 140         char* words[COMMAND_BUFSIZE];
 141         memset(words,0,COMMAND_BUFSIZE);
 142         char* req = request;
 143
 144         char* cur_tok = strtok( req, " " );
 145
 146         if( cur_tok == NULL )
 147                 return 0;
 148
 149         while(cur_tok != NULL) {
 150                 words[i++] = cur_tok;
 151                 cur_tok = strtok( NULL, " " );
 152         }
 153
 154
 155         // not sure why (strtok?), but this is necessary
 156         memset( words + i, 0, COMMAND_BUFSIZE - i );
 157
 158         /* pass off to the top level command */
 159         if( !strcmp(words[0],"router") )
 160                 ret_val = handle_router( words );
 161
 162         else if( !strcmp(words[0],"time") )
 163                 ret_val = handle_time( words );
 164
 165         else if (!strcmp(words[0],"request"))
 166                 ret_val = handle_request( words, 0 );
 167
 168         else if (!strcmp(words[0],"relay"))
 169                 ret_val = handle_request( words, 1 );
 170
 171         else if (!strcmp(words[0],"help"))
 172                 ret_val = print_help();
 173
 174         else if (!strcmp(words[0],"set"))
 175                 ret_val = handle_set(words);
 176
 177         else if (!strcmp(words[0],"print"))
 178                 ret_val = handle_print(words);
 179
 180         else if (words[0][0] == '!')
 181                 ret_val = handle_exec( words );
 182
 183         if(!ret_val)
 184                 return parse_error( words );
 185
 186         return 1;
 187
 188 }
 189
 190 int handle_set( char* words[]) {
 191
 192         char* variable;
 193         if( (variable=words[1]) ) {
 194
 195                 char* val;
 196                 if( (val=words[2]) ) {
 197
 198                         if(!strcmp(variable,"pretty_print")) {
 199                                 if(!strcmp(val,"true")) {
 200                                         pretty_print = 1;
 201                                         printf("pretty_print = true\n");
 202                                         return 1;
 203                                 }
 204                                 if(!strcmp(val,"false")) {
 205                                         pretty_print = 0;
 206                                         printf("pretty_print = false\n");
 207                                         return 1;
 208                                 }
 209                         }
 210                 }
 211         }
 212
 213         return 0;
 214 }
 215
 216
 217 int handle_print( char* words[]) {
 218
 219         char* variable;
 220         if( (variable=words[1]) ) {
 221                 if(!strcmp(variable,"pretty_print")) {
 222                         if(pretty_print) {
 223                                 printf("pretty_print = true\n");
 224                                 return 1;
 225                         } else {
 226                                 printf("pretty_print = false\n");
 227                                 return 1;
 228                         }
 229                 }
 230         }
 231         return 0;
 232 }
 233
 234 int handle_router( char* words[] ) {
 235
 236         if(!client)
 237                 return 1;
 238
 239         int i;
 240
 241         if( words[1] ) {
 242                 if( !strcmp(words[1],"query") ) {
 243
 244                         if( words[2] && !strcmp(words[2],"servers") ) {
 245                                 for(i=3; i < COMMAND_BUFSIZE - 3 && words[i]; i++ ) {
 246                                         router_query_servers( words[i] );
 247                                 }
 248                                 return 1;
 249                         }
 250                         return 0;
 251                 }
 252                 return 0;
 253         }
 254         return 0;
 255 }
 256
 257
 258 int handle_exec(char* words[]) {
 259
 260         int len = strlen(words[0]);
 261         char command[len];
 262         memset(command,0,len);
 263
 264         int i; /* chop out the ! */
 265         for( i=1; i!= len; i++) {
 266                 command[i-1] = words[0][i];
 267         }
 268
 269         free(words[0]);
 270         words[0] = strdup(command);
 271         signal(SIGCHLD,sig_child_handler);
 272         if(fork()) {
 273                 while(1) {
 274                         sleep(100);
 275                         if(child_dead) {
 276                                 signal(SIGCHLD,sig_child_handler);
 277                                 child_dead = 0;
 278                                 break;
 279                         }
 280                 }
 281         } else {
 282                 execvp( words[0], words );
 283         }
 284         return 1;
 285 }
 286
 287
 288 int handle_request( char* words[], int relay ) {
 289
 290         if(!client)
 291                 return 1;
 292
 293         if(words[1]) {
 294                 char* server = words[1];
 295                 char* method = words[2];
 296                 int i;
 297                 growing_buffer* buffer = NULL;
 298                 if(!relay) {
 299                         buffer = buffer_init(128);
 300                         buffer_add(buffer, "[");
 301                         for(i = 3; words[i] != NULL; i++ ) {
 302                                 buffer_add( buffer, words[i] );
 303                                 buffer_add(buffer, " ");
 304                         }
 305                         buffer_add(buffer, "]");
 306                 }
 307
 308                 return send_request( server, method, buffer, relay );
 309         }
 310
 311         return 0;
 312 }
 313
 314 int send_request( char* server,
 315                 char* method, growing_buffer* buffer, int relay ) {
 316         if( server == NULL || method == NULL )
 317                 return 0;
 318
 319         json* params = NULL;
 320         if( !relay ) {
 321                 if( buffer != NULL && buffer->n_used > 0 )
 322                         params = json_tokener_parse(buffer->buf);
 323         } else {
 324                 if(!last_result->result_content) {
 325                         warning_handler("We're not going to call 'relay' on empty result");
 326                         return 1;
 327                 }
 328                 else {
 329                         json* arr = json_object_new_array();
 330                         json_object_array_add( arr, last_result->result_content );
 331                         params = arr;
 332                 }
 333         }
 334
 335         osrf_app_session* session = osrf_app_client_session_init(server);
 336         double start = get_timestamp_millis();
 337
 338         if(!osrf_app_session_connect(session)) {
 339                 warning_handler( "Unable to connect to remote service %s\n", server );
 340                 return 1;
 341         }
 342
 343         int req_id = osrf_app_session_make_request( session, params, method, 1 );
 344
 345         osrf_message* omsg = osrf_app_session_request_recv( session, req_id, 8 );
 346
 347         if(!omsg)
 348                 printf("\nReceived no data from server\n");
 349
 350
 351         while(omsg) {
 352
 353                 if(omsg->result_content) {
 354
 355                         osrf_message_free(last_result);
 356                         last_result = omsg;
 357
 358                         if( pretty_print ) {
 359                                 char* content = json_printer( omsg->result_content );
 360                                 printf( "\nReceived Data: %s\n",content );
 361                                 free(content);
 362                         } else {
 363                                 printf( "\nReceived Data: %s\n",
 364                                         json_object_to_json_string(omsg->result_content));
 365                         }
 366
 367                 } else {
 368
 369                         printf( "\nReceived Exception:\nName: %s\nStatus: "
 370                                         "%s\nStatusCode %d\n", omsg->status_name,
 371                                         omsg->status_text, omsg->status_code );
 372                 }
 373
 374                 omsg = osrf_app_session_request_recv( session, req_id, 5 );
 375         }
 376
 377         double end = get_timestamp_millis();
 378
 379         printf("\n------------------------------------\n");
 380         if( osrf_app_session_request_complete( session, req_id ))
 381                 printf("Request Completed Successfully\n");
 382
 383
 384         printf("Request Time in seconds: %f\n", end - start );
 385         printf("------------------------------------\n");
 386
 387         osrf_app_session_request_finish( session, req_id );
 388         osrf_app_session_disconnect( session );
 389         osrf_app_session_destroy( session );
 390
 391         return 1;
 392
 393
 394 }
 395
 396 int handle_time( char* words[] ) {
 397
 398         if( ! words[1] ) {
 399
 400                 char buf[36];
 401                 memset(buf,0,36);
 402                 get_timestamp(buf);
 403                 printf( "%s\n", buf );
 404                 return 1;
 405         }
 406
 407         if( words[1] ) {
 408                 time_t epoch = (time_t)atoi( words[1] );
 409                 char* localtime = strdup( ctime( &epoch ) );
 410                 printf( "%s => %s", words[1], localtime );
 411                 free(localtime);
 412                 return 1;
 413         }
 414
 415         return 0;
 416
 417 }
 418
 419
 420
 421 int router_query_servers( char* router_server ) {
 422
 423         if( ! router_server || strlen(router_server) == 0 )
 424                 return 0;
 425
 426         char rbuf[256];
 427         memset(rbuf,0,256);
 428         sprintf(rbuf,"router@%s/router", router_server );
 429
 430         transport_message* send =
 431                 message_init( "servers", NULL, NULL, rbuf, NULL );
 432         message_set_router_info( send, NULL, NULL, NULL, "query", 0 );
 433
 434         client_send_message( client, send );
 435         message_free( send );
 436
 437         transport_message* recv = client_recv( client, -1 );
 438         if( recv == NULL ) {
 439                 fprintf(stderr, "NULL message received from router\n");
 440                 return 1;
 441         }
 442
 443         printf(
 444                         "---------------------------------------------------------------------------------\n"
 445                         "Received from 'server' query on %s\n"
 446                         "---------------------------------------------------------------------------------\n"
 447                         "original reg time | latest reg time | last used time | class | server\n"
 448                         "---------------------------------------------------------------------------------\n"
 449                         "%s"
 450                         "---------------------------------------------------------------------------------\n"
 451                         , router_server, recv->body );
 452
 453         message_free( recv );
 454
 455         return 1;
 456 }
 457
 458 int print_help() {
 459
 460         printf(
 461                         "---------------------------------------------------------------------------------\n"
 462                         "Commands:\n"
 463                         "---------------------------------------------------------------------------------\n"
 464                         "help                   - Display this message\n"
 465                         "!<command> [args] - Forks and runs the given command in the shell\n"
 466                         "time                   - Prints the current time\n"
 467                         "time <timestamp>       - Formats seconds since epoch into readable format\n"
 468                         "set <variable> <value> - set a srfsh variable (e.g. set pretty_print true )\n"
 469                         "print <variable>               - Displays the value of a srfsh variable\n"
 470                         "---------------------------------------------------------------------------------\n"
 471                         "router query servers <server1 [, server2, ...]>\n"
 472                         "       - Returns stats on connected services\n"
 473                         "\n"
 474                         "reqeust <service> <method> [ <json formatted string of params> ]\n"
 475                         "       - Anything passed in will be wrapped in a json array,\n"
 476                         "               so add commas if there is more than one param\n"
 477                         "\n"
 478                         "relay <service> <method>\n"
 479                         "       - Performs the requested query using the last received result as the param\n"
 480                         "---------------------------------------------------------------------------------\n"
 481                         );
 482
 483         return 1;
 484 }
 485
 486
 487
 488 char* tabs(int count) {
 489         growing_buffer* buf = buffer_init(24);
 490         int i;
 491         for(i=0;i!=count;i++)
 492                 buffer_add(buf, "   ");
 493
 494         char* final = buffer_data( buf );
 495         buffer_free( buf );
 496         return final;
 497 }
 498
 499 char* json_printer( json* object ) {
 500
 501         if(object == NULL)
 502                 return NULL;
 503         char* string = json_object_to_json_string(object);
 504
 505         growing_buffer* buf = buffer_init(64);
 506         int i;
 507         int tab_var = 0;
 508         for(i=0; i!= strlen(string); i++) {
 509
 510                 if( string[i] == '{' ) {
 511
 512                         buffer_add(buf, "\n");
 513                         char* tab = tabs(tab_var);
 514                         buffer_add(buf, tab);
 515                         free(tab);
 516                         buffer_add( buf, "{");
 517                         tab_var++;
 518                         buffer_add( buf, "\n" );
 519                         tab = tabs(tab_var);
 520                         buffer_add( buf, tab );
 521                         free(tab);
 522
 523                 } else if( string[i] == '[' ) {
 524
 525                         buffer_add(buf, "\n");
 526                         char* tab = tabs(tab_var);
 527                         buffer_add(buf, tab);
 528                         free(tab);
 529                         buffer_add( buf, "[");
 530                         tab_var++;
 531                         buffer_add( buf, "\n" );
 532                         tab = tabs(tab_var);
 533                         buffer_add( buf, tab );
 534                         free(tab);
 535
 536                 } else if( string[i] == '}' ) {
 537
 538                         tab_var--;
 539                         buffer_add(buf, "\n");
 540                         char* tab = tabs(tab_var);
 541                         buffer_add(buf, tab);
 542                         free(tab);
 543                         buffer_add( buf, "}");
 544                         buffer_add( buf, "\n" );
 545                         tab = tabs(tab_var);
 546                         buffer_add( buf, tab );
 547                         free(tab);
 548
 549                 } else if( string[i] == ']' ) {
 550
 551                         tab_var--;
 552                         buffer_add(buf, "\n");
 553                         char* tab = tabs(tab_var);
 554                         buffer_add(buf, tab);
 555                         free(tab);
 556                         buffer_add( buf, "]");
 557                         buffer_add( buf, "\n" );
 558                         tab = tabs(tab_var);
 559                         buffer_add( buf, tab );
 560                         free(tab);
 561
 562                 } else {
 563                         char b[2];
 564                         b[0] = string[i];
 565                         b[1] = '\0';
 566                         buffer_add( buf, b );
 567                 }
 568
 569         }
 570
 571         char* result = buffer_data(buf);
 572         buffer_free(buf);
 573         return result;
 574
 575 }