1 /* 2 * mod_vhostdb_mysql - virtual hosts mapping from backend MySQL/MariaDB database 3 * 4 * Copyright(c) 2017 Glenn Strauss gstrauss()gluelogic.com All rights reserved 5 * License: BSD 3-clause (same as lighttpd) 6 */ 7 #include "first.h" 8 9 #include <mysql.h> 10 11 #include <string.h> 12 #include <stdlib.h> 13 14 #include "base.h" 15 #include "http_vhostdb.h" 16 #include "fdevent.h" 17 #include "log.h" 18 #include "plugin.h" 19 20 /* 21 * virtual host plugin using MySQL/MariaDB for domain to directory lookups 22 */ 23 24 typedef struct { 25 MYSQL *dbconn; 26 const buffer *sqlquery; 27 } vhostdb_config; 28 29 typedef struct { 30 void *vdata; 31 } plugin_config; 32 33 typedef struct { 34 PLUGIN_DATA; 35 plugin_config defaults; 36 plugin_config conf; 37 } plugin_data; 38 39 static void mod_vhostdb_dbconf_free (void *vdata) 40 { 41 vhostdb_config *dbconf = (vhostdb_config *)vdata; 42 if (!dbconf) return; 43 mysql_close(dbconf->dbconn); 44 free(dbconf); 45 } 46 47 static int mod_vhostdb_dbconf_setup (server *srv, const array *opts, void **vdata) 48 { 49 const buffer *sqlquery = NULL; 50 const char *dbname=NULL, *user=NULL, *pass=NULL, *host=NULL, *sock=NULL; 51 unsigned int port = 0; 52 53 for (size_t i = 0; i < opts->used; ++i) { 54 const data_string *ds = (data_string *)opts->data[i]; 55 if (ds->type == TYPE_STRING && !buffer_string_is_empty(&ds->value)) { 56 if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("sql"))) { 57 sqlquery = &ds->value; 58 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("dbname"))) { 59 dbname = ds->value.ptr; 60 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("user"))) { 61 user = ds->value.ptr; 62 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("password"))) { 63 pass = ds->value.ptr; 64 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("host"))) { 65 host = ds->value.ptr; 66 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("port"))) { 67 port = strtoul(ds->value.ptr, NULL, 10); 68 } else if (buffer_is_equal_caseless_string(&ds->key, CONST_STR_LEN("sock"))) { 69 sock = ds->value.ptr; 70 } 71 } 72 } 73 74 /* required: 75 * - sql (sql query) 76 * - dbname 77 * - user 78 * 79 * optional: 80 * - password, default: empty 81 * - socket, default: mysql default 82 * - hostname, if set overrides socket 83 * - port, default: 3306 84 */ 85 86 if (!buffer_string_is_empty(sqlquery) 87 && dbname && *dbname && user && *user) { 88 vhostdb_config *dbconf; 89 MYSQL *dbconn = mysql_init(NULL); 90 if (NULL == dbconn) { 91 log_error(srv->errh, __FILE__, __LINE__, 92 "mysql_init() failed, exiting..."); 93 return -1; 94 } 95 96 #if MYSQL_VERSION_ID >= 50013 97 /* in mysql versions above 5.0.3 the reconnect flag is off by default */ 98 { 99 char reconnect = 1; 100 mysql_options(dbconn, MYSQL_OPT_RECONNECT, &reconnect); 101 } 102 #endif 103 104 /* CLIENT_MULTI_STATEMENTS first appeared in 4.1 */ 105 #if MYSQL_VERSION_ID < 40100 106 #ifndef CLIENT_MULTI_STATEMENTS 107 #define CLIENT_MULTI_STATEMENTS 0 108 #endif 109 #endif 110 if (!mysql_real_connect(dbconn, host, user, pass, dbname, port, sock, 111 CLIENT_MULTI_STATEMENTS)) { 112 log_error(srv->errh, __FILE__, __LINE__, "%s", mysql_error(dbconn)); 113 mysql_close(dbconn); 114 return -1; 115 } 116 117 fdevent_setfd_cloexec(dbconn->net.fd); 118 119 dbconf = (vhostdb_config *)calloc(1, sizeof(*dbconf)); 120 dbconf->dbconn = dbconn; 121 dbconf->sqlquery = sqlquery; 122 *vdata = dbconf; 123 } 124 125 return 0; 126 } 127 128 static void mod_vhostdb_patch_config (request_st * const r, plugin_data * const p); 129 130 static int mod_vhostdb_mysql_query(request_st * const r, void *p_d, buffer *docroot) 131 { 132 plugin_data *p = (plugin_data *)p_d; 133 vhostdb_config *dbconf; 134 unsigned cols; 135 MYSQL_ROW row; 136 MYSQL_RES *result; 137 138 /*(reuse buffer for sql query before generating docroot result)*/ 139 buffer *sqlquery = docroot; 140 buffer_clear(sqlquery); /*(also resets docroot (alias))*/ 141 142 mod_vhostdb_patch_config(r, p); 143 if (NULL == p->conf.vdata) return 0; /*(after resetting docroot)*/ 144 dbconf = (vhostdb_config *)p->conf.vdata; 145 146 for (char *b = dbconf->sqlquery->ptr, *d; *b; b = d+1) { 147 if (NULL != (d = strchr(b, '?'))) { 148 /* escape the uri.authority */ 149 unsigned long len; 150 buffer_append_string_len(sqlquery, b, (size_t)(d - b)); 151 buffer_string_prepare_append(sqlquery, buffer_string_length(&r->uri.authority) * 2); 152 len = mysql_real_escape_string(dbconf->dbconn, 153 sqlquery->ptr + buffer_string_length(sqlquery), 154 CONST_BUF_LEN(&r->uri.authority)); 155 if ((unsigned long)~0 == len) return -1; 156 buffer_commit(sqlquery, len); 157 } else { 158 d = dbconf->sqlquery->ptr + buffer_string_length(dbconf->sqlquery); 159 buffer_append_string_len(sqlquery, b, (size_t)(d - b)); 160 break; 161 } 162 } 163 164 if (mysql_real_query(dbconf->dbconn, CONST_BUF_LEN(sqlquery))) { 165 log_error(r->conf.errh, __FILE__, __LINE__, "%s", 166 mysql_error(dbconf->dbconn)); 167 buffer_clear(docroot); /*(reset buffer; no result)*/ 168 return -1; 169 } 170 171 buffer_clear(docroot); /*(reset buffer to store result)*/ 172 173 result = mysql_store_result(dbconf->dbconn); 174 cols = mysql_num_fields(result); 175 row = mysql_fetch_row(result); 176 if (row && cols >= 1) { 177 buffer_copy_string(docroot, row[0]); 178 } /* else no such virtual host */ 179 180 mysql_free_result(result); 181 #if MYSQL_VERSION_ID >= 40100 182 while (0 == mysql_next_result(dbconf->dbconn)) ; 183 #endif 184 return 0; 185 } 186 187 188 189 190 INIT_FUNC(mod_vhostdb_init) { 191 static http_vhostdb_backend_t http_vhostdb_backend_mysql = 192 { "mysql", mod_vhostdb_mysql_query, NULL }; 193 plugin_data *p = calloc(1, sizeof(*p)); 194 195 /* register http_vhostdb_backend_mysql */ 196 http_vhostdb_backend_mysql.p_d = p; 197 http_vhostdb_backend_set(&http_vhostdb_backend_mysql); 198 199 return p; 200 } 201 202 FREE_FUNC(mod_vhostdb_cleanup) { 203 plugin_data * const p = p_d; 204 if (NULL == p->cvlist) return; 205 /* (init i to 0 if global context; to 1 to skip empty global context) */ 206 for (int i = !p->cvlist[0].v.u2[1], used = p->nconfig; i < used; ++i) { 207 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 208 for (; -1 != cpv->k_id; ++cpv) { 209 if (cpv->vtype != T_CONFIG_LOCAL || NULL == cpv->v.v) continue; 210 switch (cpv->k_id) { 211 case 0: /* vhostdb.<db> */ 212 mod_vhostdb_dbconf_free(cpv->v.v); 213 break; 214 default: 215 break; 216 } 217 } 218 } 219 } 220 221 static void mod_vhostdb_merge_config_cpv(plugin_config * const pconf, const config_plugin_value_t * const cpv) { 222 switch (cpv->k_id) { /* index into static config_plugin_keys_t cpk[] */ 223 case 0: /* vhostdb.<db> */ 224 if (cpv->vtype == T_CONFIG_LOCAL) 225 pconf->vdata = cpv->v.v; 226 break; 227 default:/* should not happen */ 228 return; 229 } 230 } 231 232 static void mod_vhostdb_merge_config(plugin_config * const pconf, const config_plugin_value_t *cpv) { 233 do { 234 mod_vhostdb_merge_config_cpv(pconf, cpv); 235 } while ((++cpv)->k_id != -1); 236 } 237 238 static void mod_vhostdb_patch_config(request_st * const r, plugin_data * const p) { 239 p->conf = p->defaults; /* copy small struct instead of memcpy() */ 240 /*memcpy(&p->conf, &p->defaults, sizeof(plugin_config));*/ 241 for (int i = 1, used = p->nconfig; i < used; ++i) { 242 if (config_check_cond(r, (uint32_t)p->cvlist[i].k_id)) 243 mod_vhostdb_merge_config(&p->conf,p->cvlist + p->cvlist[i].v.u2[0]); 244 } 245 } 246 247 SETDEFAULTS_FUNC(mod_vhostdb_set_defaults) { 248 static const config_plugin_keys_t cpk[] = { 249 { CONST_STR_LEN("vhostdb.mysql"), 250 T_CONFIG_ARRAY_KVSTRING, 251 T_CONFIG_SCOPE_CONNECTION } 252 ,{ NULL, 0, 253 T_CONFIG_UNSET, 254 T_CONFIG_SCOPE_UNSET } 255 }; 256 257 plugin_data * const p = p_d; 258 if (!config_plugin_values_init(srv, p, cpk, "mod_vhostdb_mysql")) 259 return HANDLER_ERROR; 260 261 /* process and validate config directives 262 * (init i to 0 if global context; to 1 to skip empty global context) */ 263 for (int i = !p->cvlist[0].v.u2[1]; i < p->nconfig; ++i) { 264 config_plugin_value_t *cpv = p->cvlist + p->cvlist[i].v.u2[0]; 265 for (; -1 != cpv->k_id; ++cpv) { 266 switch (cpv->k_id) { 267 case 0: /* vhostdb.<db> */ 268 if (cpv->v.a->used) { 269 if (0 != mod_vhostdb_dbconf_setup(srv, cpv->v.a, &cpv->v.v)) 270 return HANDLER_ERROR; 271 if (NULL != cpv->v.v) 272 cpv->vtype = T_CONFIG_LOCAL; 273 } 274 break; 275 default:/* should not happen */ 276 break; 277 } 278 } 279 } 280 281 /* initialize p->defaults from global config context */ 282 if (p->nconfig > 0 && p->cvlist->v.u2[1]) { 283 const config_plugin_value_t *cpv = p->cvlist + p->cvlist->v.u2[0]; 284 if (-1 != cpv->k_id) 285 mod_vhostdb_merge_config(&p->defaults, cpv); 286 } 287 288 return HANDLER_GO_ON; 289 } 290 291 292 int mod_vhostdb_mysql_plugin_init (plugin *p); 293 int mod_vhostdb_mysql_plugin_init (plugin *p) 294 { 295 p->version = LIGHTTPD_VERSION_ID; 296 p->name = "vhostdb_mysql"; 297 298 p->init = mod_vhostdb_init; 299 p->cleanup = mod_vhostdb_cleanup; 300 p->set_defaults = mod_vhostdb_set_defaults; 301 302 return 0; 303 } 304