src/frontend/query.c

   1 /*
   2  * SysDB - src/frontend/query.c
   3  * Copyright (C) 2013 Sebastian 'tokkee' Harl <sh@tokkee.org>
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  18  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
  19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27
  28 #include "sysdb.h"
  29
  30 #include "core/store.h"
  31 #include "frontend/connection-private.h"
  32 #include "utils/error.h"
  33 #include "utils/strbuf.h"
  34
  35 #include <errno.h>
  36
  37 /*
  38  * public API
  39  */
  40
  41 int
  42 sdb_fe_exec(sdb_conn_t *conn, sdb_conn_node_t *node)
  43 {
  44         if (! node)
  45                 return -1;
  46
  47         switch (node->cmd) {
  48                 case CONNECTION_FETCH:
  49                         return sdb_fe_fetch(conn, CONN_FETCH(node)->name);
  50                 case CONNECTION_LIST:
  51                         return sdb_fe_list(conn);
  52
  53                 default:
  54                         sdb_log(SDB_LOG_ERR, "frontend: Unknown command %i", node->cmd);
  55                         return -1;
  56         }
  57         return -1;
  58 } /* sdb_fe_exec */
  59
  60 int
  61 sdb_fe_fetch(sdb_conn_t *conn, const char *name)
  62 {
  63         sdb_strbuf_t *buf;
  64         sdb_store_base_t *host;
  65
  66         host = sdb_store_get_host(name);
  67         if (! host) {
  68                 sdb_log(SDB_LOG_DEBUG, "frontend: Failed to fetch host '%s': "
  69                                 "not found", name);
  70
  71                 sdb_strbuf_sprintf(conn->errbuf, "Host %s not found", name);
  72                 return -1;
  73         }
  74
  75         buf = sdb_strbuf_create(1024);
  76         if (! buf) {
  77                 char errbuf[1024];
  78                 sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
  79                                 "buffer to handle FETCH command: %s",
  80                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
  81
  82                 sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
  83                 sdb_strbuf_destroy(buf);
  84                 sdb_object_deref(SDB_OBJ(host));
  85                 return -1;
  86         }
  87
  88         if (sdb_store_host_tojson(host, buf, /* flags = */ 0)) {
  89                 sdb_log(SDB_LOG_ERR, "frontend: Failed to serialize "
  90                                 "host '%s' to JSON", name);
  91                 sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
  92                 sdb_strbuf_destroy(buf);
  93                 sdb_object_deref(SDB_OBJ(host));
  94                 return -1;
  95         }
  96
  97         sdb_connection_send(conn, CONNECTION_OK,
  98                         (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
  99         sdb_strbuf_destroy(buf);
 100         sdb_object_deref(SDB_OBJ(host));
 101         return 0;
 102 } /* sdb_fe_fetch */
 103
 104 int
 105 sdb_fe_list(sdb_conn_t *conn)
 106 {
 107         sdb_strbuf_t *buf;
 108
 109         buf = sdb_strbuf_create(1024);
 110         if (! buf) {
 111                 char errbuf[1024];
 112                 sdb_log(SDB_LOG_ERR, "frontend: Failed to create "
 113                                 "buffer to handle LIST command: %s",
 114                                 sdb_strerror(errno, errbuf, sizeof(errbuf)));
 115
 116                 sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
 117                 sdb_strbuf_destroy(buf);
 118                 return -1;
 119         }
 120
 121         if (sdb_store_tojson(buf, /* flags = */ 0)) {
 122                 sdb_log(SDB_LOG_ERR, "frontend: Failed to serialize "
 123                                 "store to JSON");
 124                 sdb_strbuf_sprintf(conn->errbuf, "Out of memory");
 125                 sdb_strbuf_destroy(buf);
 126                 return -1;
 127         }
 128
 129         sdb_connection_send(conn, CONNECTION_OK,
 130                         (uint32_t)sdb_strbuf_len(buf), sdb_strbuf_string(buf));
 131         sdb_strbuf_destroy(buf);
 132         return 0;
 133 } /* sdb_fe_list */
 134
 135 /* vim: set tw=78 sw=4 ts=4 noexpandtab : */
 136