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