lua_connector.c 7.8 KB
Newer Older
1 2 3 4 5 6 7 8 9
#include <stdio.h>
#include <math.h>
#include <stdarg.h>
#include <stdlib.h>
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#include <taos.h>

10 11 12 13 14 15
struct cb_param{
  lua_State* state;
  int callback;
  void * stream;
};

16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
static int l_connect(lua_State *L){
  TAOS *    taos=NULL;
  char* host;
  char* database;
  char* user;
  char* password;
  int port;

  luaL_checktype(L, 1, LUA_TTABLE);

  lua_getfield(L,-1,"host");
  if (lua_isstring(L,-1)){
    host = lua_tostring(L, -1);
    // printf("host = %s\n", host);
  }
  
  lua_getfield(L, 1, "port");
  if (lua_isinteger(L,-1)){
    port = lua_tointeger(L, -1);
    //printf("port = %d\n", port);
  }
  
  lua_getfield(L, 1, "database");
  if (lua_isstring(L, -1)){
    database = lua_tostring(L, -1);
    //printf("database = %s\n", database);
  }
  
  lua_getfield(L, 1, "user");
  if (lua_isstring(L, -1)){
    user = lua_tostring(L, -1);
    //printf("user = %s\n", user);
  }

  lua_getfield(L, 1, "password");
  if (lua_isstring(L, -1)){
    password = lua_tostring(L, -1);
    //printf("password = %s\n", password);
  }
55

56
  lua_settop(L,0);
57

58 59 60 61 62 63
  taos_init();
  lua_newtable(L);
  int table_index = lua_gettop(L);

  taos = taos_connect(host, user,password,database, port);
  if (taos == NULL) {
64
    printf("failed to connect server, reason:%s\n", taos_errstr(taos));
65
    
66
    lua_pushinteger(L, -1);
67 68 69 70
    lua_setfield(L, table_index, "code");
    lua_pushstring(L, taos_errstr(taos));
    lua_setfield(L, table_index, "error");    
    lua_pushlightuserdata(L,NULL);
71
    lua_setfield(L, table_index, "conn");
72
  }else{
73 74
    // printf("success to connect server\n");
    lua_pushinteger(L, 0);
75 76 77 78 79 80
    lua_setfield(L, table_index, "code");
    lua_pushstring(L, taos_errstr(taos));
    lua_setfield(L, table_index, "error");    
    lua_pushlightuserdata(L,taos);
    lua_setfield(L, table_index, "conn");
  }
81
  
82 83 84 85 86 87 88 89 90 91
  return 1;
}

static int l_query(lua_State *L){
  TAOS *    taos= lua_topointer(L,1);
  char *s = lua_tostring(L, 2);
  TAOS_RES *result;
  lua_newtable(L);
  int table_index = lua_gettop(L);

92
  //  printf("receive command:%s\r\n",s);
R
robot 已提交
93 94 95 96
    result = taos_query(taos,s);
    int32_t code = taos_errno(result);
  if( code != 0){
    printf("failed, reason:%s\n", taos_errstr(result));
97
    lua_pushinteger(L, -1);
98 99 100 101 102 103 104
    lua_setfield(L, table_index, "code");    
    lua_pushstring(L, taos_errstr(taos));
    lua_setfield(L, table_index, "error");    
   
    return 1;
    
  }else{
105
    //printf("success to query.\n");
106 107
    TAOS_ROW    row;
    int         rows = 0;
R
robot 已提交
108
    int         num_fields = taos_field_count(result);
109 110 111
    TAOS_FIELD *fields = taos_fetch_fields(result);
    char        temp[256];

R
robot 已提交
112
    int affectRows = taos_affected_rows(result);
113
    //    printf(" affect rows:%d\r\n", affectRows);
114
    lua_pushinteger(L, 0);
115
    lua_setfield(L, table_index, "code");
116 117
    lua_pushinteger(L, affectRows);
    lua_setfield(L, table_index, "affected");
118 119 120
    lua_newtable(L);
    
    while ((row = taos_fetch_row(result))) {
121
      //printf("row index:%d\n",rows);
122
      rows++;
123

124
      lua_pushnumber(L,rows);
125 126 127 128 129 130 131 132
      lua_newtable(L);

      for (int i = 0; i < num_fields; ++i) {
	if (row[i] == NULL) {
	  continue;
	}

	lua_pushstring(L,fields[i].name);
133

134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170
	switch (fields[i].type) {
	case TSDB_DATA_TYPE_TINYINT:
	  lua_pushinteger(L,*((char *)row[i]));
	  break;
	case TSDB_DATA_TYPE_SMALLINT:
	  lua_pushinteger(L,*((short *)row[i]));
	  break;
	case TSDB_DATA_TYPE_INT:
	  lua_pushinteger(L,*((int *)row[i]));
	  break;
	case TSDB_DATA_TYPE_BIGINT:
	  lua_pushinteger(L,*((int64_t *)row[i]));
	  break;
	case TSDB_DATA_TYPE_FLOAT:
	  lua_pushnumber(L,*((float *)row[i]));
	  break;
	case TSDB_DATA_TYPE_DOUBLE:
	  lua_pushnumber(L,*((double *)row[i]));
	  break;
	case TSDB_DATA_TYPE_BINARY:
	case TSDB_DATA_TYPE_NCHAR:
	  lua_pushstring(L,(char *)row[i]);
	  break;
	case TSDB_DATA_TYPE_TIMESTAMP:
	  lua_pushinteger(L,*((int64_t *)row[i]));
	  break;
	case TSDB_DATA_TYPE_BOOL:
	  lua_pushinteger(L,*((char *)row[i]));
	  break;
	default:
	  lua_pushnil(L);
	  break;
	}

	lua_settable(L,-3);
      }

171 172 173 174
      lua_settable(L,-3);
    }
    taos_free_result(result);    
  }
175

176 177 178 179
  lua_setfield(L, table_index, "item");
  return 1;
}

180 181 182 183 184
void stream_cb(void *param, TAOS_RES *result, TAOS_ROW row){
  struct cb_param* p = (struct cb_param*) param;
  TAOS_FIELD *fields = taos_fetch_fields(result);
  int         numFields = taos_num_fields(result);

185 186
  // printf("\nnumfields:%d\n", numFields);
  //printf("\n\r-----------------------------------------------------------------------------------\n");
187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238

  lua_State *L = p->state;
  lua_rawgeti(L, LUA_REGISTRYINDEX, p->callback);

  lua_newtable(L);

  for (int i = 0; i < numFields; ++i) {
    if (row[i] == NULL) {
      continue;
    }

    lua_pushstring(L,fields[i].name);

    switch (fields[i].type) {
    case TSDB_DATA_TYPE_TINYINT:
      lua_pushinteger(L,*((char *)row[i]));
      break;
    case TSDB_DATA_TYPE_SMALLINT:
      lua_pushinteger(L,*((short *)row[i]));
      break;
    case TSDB_DATA_TYPE_INT:
      lua_pushinteger(L,*((int *)row[i]));
      break;
    case TSDB_DATA_TYPE_BIGINT:
      lua_pushinteger(L,*((int64_t *)row[i]));
      break;
    case TSDB_DATA_TYPE_FLOAT:
      lua_pushnumber(L,*((float *)row[i]));
      break;
    case TSDB_DATA_TYPE_DOUBLE:
      lua_pushnumber(L,*((double *)row[i]));
      break;
    case TSDB_DATA_TYPE_BINARY:
    case TSDB_DATA_TYPE_NCHAR:
      lua_pushstring(L,(char *)row[i]);
      break;
    case TSDB_DATA_TYPE_TIMESTAMP:
      lua_pushinteger(L,*((int64_t *)row[i]));
      break;
    case TSDB_DATA_TYPE_BOOL:
      lua_pushinteger(L,*((char *)row[i]));
      break;
    default:
      lua_pushnil(L);
      break;
    }

    lua_settable(L, -3);
  }

  lua_call(L, 1, 0);

239
  //  printf("-----------------------------------------------------------------------------------\n\r");
240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286
}

static int l_open_stream(lua_State *L){
  int r = luaL_ref(L, LUA_REGISTRYINDEX);
  TAOS *    taos = lua_topointer(L,1);
  char * sqlstr = lua_tostring(L,2);
  int stime = luaL_checknumber(L,3);

  lua_newtable(L);
  int table_index = lua_gettop(L);

  struct cb_param *p = malloc(sizeof(struct cb_param));
  p->state = L;
  p->callback=r;
  //  printf("r:%d, L:%d\n",r,L);
  void * s = taos_open_stream(taos,sqlstr,stream_cb,stime,p,NULL);
  if (s == NULL) {
    printf("failed to open stream, reason:%s\n", taos_errstr(taos));
    free(p);
    lua_pushnumber(L, -1);
    lua_setfield(L, table_index, "code");
    lua_pushstring(L, taos_errstr(taos));
    lua_setfield(L, table_index, "error");
    lua_pushlightuserdata(L,NULL);
    lua_setfield(L, table_index, "stream");
  }else{
    //    printf("success to open stream\n");
    lua_pushnumber(L, 0);
    lua_setfield(L, table_index, "code");
    lua_pushstring(L, taos_errstr(taos));
    lua_setfield(L, table_index, "error");
    p->stream = s;
    lua_pushlightuserdata(L,p);
    lua_setfield(L, table_index, "stream");//stream has different content in lua and c.
  }

  return 1;
}

static int l_close_stream(lua_State *L){
  //TODO:get stream and free cb_param
  struct cb_param *p = lua_touserdata(L,1);
  taos_close_stream(p->stream);
  free(p);
  return 0;
}

287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310
static int l_close(lua_State *L){
  TAOS *    taos= lua_topointer(L,1);
  lua_newtable(L);
  int table_index = lua_gettop(L);
  
  if(taos == NULL){
    lua_pushnumber(L, -1);
    lua_setfield(L, table_index, "code");    
    lua_pushstring(L, "null pointer.");
    lua_setfield(L, table_index, "error"); 
  }else{
    taos_close(taos);   
    lua_pushnumber(L, 0);
    lua_setfield(L, table_index, "code");    
    lua_pushstring(L, "done.");
    lua_setfield(L, table_index, "error");    
  }
  return 1;
}

static const struct luaL_Reg lib[] = {
    {"connect", l_connect},
    {"query", l_query},
    {"close", l_close},
311 312
    {"open_stream", l_open_stream},
    {"close_stream", l_close_stream},
313 314 315 316 317 318 319 320 321
    {NULL, NULL}
};

extern int luaopen_luaconnector(lua_State* L)
{
    luaL_newlib(L, lib);

    return 1;
}