1#include "plugin.h" 2#include "log.h" 3#include "response.h" 4#include "stat_cache.h" 5 6#include <string.h> 7#include <errno.h> 8#include <ctype.h> 9 10typedef struct { 11 /* unparsed pieces */ 12 buffer *path_pieces_raw; 13 14 /* pieces for path creation */ 15 size_t len; 16 buffer **path_pieces; 17} plugin_config; 18 19typedef struct { 20 PLUGIN_DATA; 21 buffer *tmp_buf; 22 23 plugin_config **config_storage; 24 plugin_config conf; 25} plugin_data; 26 27INIT_FUNC(mod_evhost_init) { 28 plugin_data *p; 29 30 p = calloc(1, sizeof(*p)); 31 32 p->tmp_buf = buffer_init(); 33 34 return p; 35} 36 37FREE_FUNC(mod_evhost_free) { 38 plugin_data *p = p_d; 39 40 UNUSED(srv); 41 42 if (!p) return HANDLER_GO_ON; 43 44 if (p->config_storage) { 45 size_t i; 46 for (i = 0; i < srv->config_context->used; i++) { 47 plugin_config *s = p->config_storage[i]; 48 49 if (NULL == s) continue; 50 51 if(s->path_pieces) { 52 size_t j; 53 for (j = 0; j < s->len; j++) { 54 buffer_free(s->path_pieces[j]); 55 } 56 57 free(s->path_pieces); 58 } 59 60 buffer_free(s->path_pieces_raw); 61 62 free(s); 63 } 64 free(p->config_storage); 65 } 66 67 buffer_free(p->tmp_buf); 68 69 free(p); 70 71 return HANDLER_GO_ON; 72} 73 74static void mod_evhost_parse_pattern(plugin_config *s) { 75 char *ptr = s->path_pieces_raw->ptr,*pos; 76 77 s->path_pieces = NULL; 78 79 for(pos=ptr;*ptr;ptr++) { 80 if(*ptr == '%') { 81 s->path_pieces = realloc(s->path_pieces,(s->len+2) * sizeof(*s->path_pieces)); 82 s->path_pieces[s->len] = buffer_init(); 83 s->path_pieces[s->len+1] = buffer_init(); 84 85 buffer_copy_string_len(s->path_pieces[s->len],pos,ptr-pos); 86 pos = ptr + 2; 87 88 buffer_copy_string_len(s->path_pieces[s->len+1],ptr++,2); 89 90 s->len += 2; 91 } 92 } 93 94 if(*pos != '\0') { 95 s->path_pieces = realloc(s->path_pieces,(s->len+1) * sizeof(*s->path_pieces)); 96 s->path_pieces[s->len] = buffer_init(); 97 98 buffer_copy_string_len(s->path_pieces[s->len],pos,ptr-pos); 99 100 s->len += 1; 101 } 102} 103 104SETDEFAULTS_FUNC(mod_evhost_set_defaults) { 105 plugin_data *p = p_d; 106 size_t i; 107 108 /** 109 * 110 * # 111 * # define a pattern for the host url finding 112 * # %% => % sign 113 * # %0 => domain name + tld 114 * # %1 => tld 115 * # %2 => domain name without tld 116 * # %3 => subdomain 1 name 117 * # %4 => subdomain 2 name 118 * # %_ => fqdn (without port info) 119 * # 120 * evhost.path-pattern = "/home/ckruse/dev/www/%3/htdocs/" 121 * 122 */ 123 124 config_values_t cv[] = { 125 { "evhost.path-pattern", NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION }, 126 { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } 127 }; 128 129 if (!p) return HANDLER_ERROR; 130 131 p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *)); 132 133 for (i = 0; i < srv->config_context->used; i++) { 134 data_config const* config = (data_config const*)srv->config_context->data[i]; 135 plugin_config *s; 136 137 s = calloc(1, sizeof(plugin_config)); 138 s->path_pieces_raw = buffer_init(); 139 s->path_pieces = NULL; 140 s->len = 0; 141 142 cv[0].destination = s->path_pieces_raw; 143 144 p->config_storage[i] = s; 145 146 if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) { 147 return HANDLER_ERROR; 148 } 149 150 if (!buffer_string_is_empty(s->path_pieces_raw)) { 151 mod_evhost_parse_pattern(s); 152 } 153 } 154 155 return HANDLER_GO_ON; 156} 157 158/** 159 * assign the different parts of the domain to array-indezes (sub2.sub1.domain.tld) 160 * - %0 - domain.tld 161 * - %1 - tld 162 * - %2 - domain 163 * - %3 - sub1 164 * - ... 165 */ 166 167static int mod_evhost_parse_host(connection *con,array *host) { 168 register char *ptr = con->uri.authority->ptr + buffer_string_length(con->uri.authority); 169 char *colon = ptr; /* needed to filter out the colon (if exists) */ 170 int first = 1; 171 data_string *ds; 172 int i; 173 174 /* first, find the domain + tld */ 175 for(;ptr > con->uri.authority->ptr;ptr--) { 176 if(*ptr == '.') { 177 if(first) first = 0; 178 else break; 179 } else if(*ptr == ':') { 180 colon = ptr; 181 first = 1; 182 } 183 } 184 185 ds = data_string_init(); 186 buffer_copy_string_len(ds->key,CONST_STR_LEN("%0")); 187 188 /* if we stopped at a dot, skip the dot */ 189 if (*ptr == '.') ptr++; 190 buffer_copy_string_len(ds->value, ptr, colon-ptr); 191 192 array_insert_unique(host,(data_unset *)ds); 193 194 /* if the : is not the start of the authority, go on parsing the hostname */ 195 196 if (colon != con->uri.authority->ptr) { 197 for(ptr = colon - 1, i = 1; ptr > con->uri.authority->ptr; ptr--) { 198 if(*ptr == '.') { 199 if (ptr != colon - 1) { 200 /* is something between the dots */ 201 ds = data_string_init(); 202 buffer_copy_string_len(ds->key,CONST_STR_LEN("%")); 203 buffer_append_int(ds->key, i++); 204 buffer_copy_string_len(ds->value,ptr+1,colon-ptr-1); 205 206 array_insert_unique(host,(data_unset *)ds); 207 } 208 colon = ptr; 209 } 210 } 211 212 /* if the . is not the first charactor of the hostname */ 213 if (colon != ptr) { 214 ds = data_string_init(); 215 buffer_copy_string_len(ds->key,CONST_STR_LEN("%")); 216 buffer_append_int(ds->key, i /* ++ */); 217 buffer_copy_string_len(ds->value,ptr,colon-ptr); 218 219 array_insert_unique(host,(data_unset *)ds); 220 } 221 } 222 223 return 0; 224} 225 226#define PATCH(x) \ 227 p->conf.x = s->x; 228static int mod_evhost_patch_connection(server *srv, connection *con, plugin_data *p) { 229 size_t i, j; 230 plugin_config *s = p->config_storage[0]; 231 232 PATCH(path_pieces); 233 PATCH(len); 234 235 /* skip the first, the global context */ 236 for (i = 1; i < srv->config_context->used; i++) { 237 data_config *dc = (data_config *)srv->config_context->data[i]; 238 s = p->config_storage[i]; 239 240 /* condition didn't match */ 241 if (!config_check_cond(srv, con, dc)) continue; 242 243 /* merge config */ 244 for (j = 0; j < dc->value->used; j++) { 245 data_unset *du = dc->value->data[j]; 246 247 if (buffer_is_equal_string(du->key, CONST_STR_LEN("evhost.path-pattern"))) { 248 PATCH(path_pieces); 249 PATCH(len); 250 } 251 } 252 } 253 254 return 0; 255} 256#undef PATCH 257 258 259static handler_t mod_evhost_uri_handler(server *srv, connection *con, void *p_d) { 260 plugin_data *p = p_d; 261 size_t i; 262 array *parsed_host; 263 register char *ptr; 264 int not_good = 0; 265 stat_cache_entry *sce = NULL; 266 267 /* not authority set */ 268 if (buffer_string_is_empty(con->uri.authority)) return HANDLER_GO_ON; 269 270 mod_evhost_patch_connection(srv, con, p); 271 272 /* missing even default(global) conf */ 273 if (0 == p->conf.len) { 274 return HANDLER_GO_ON; 275 } 276 277 parsed_host = array_init(); 278 279 mod_evhost_parse_host(con, parsed_host); 280 281 /* build document-root */ 282 buffer_reset(p->tmp_buf); 283 284 for (i = 0; i < p->conf.len; i++) { 285 ptr = p->conf.path_pieces[i]->ptr; 286 if (*ptr == '%') { 287 data_string *ds; 288 289 if (*(ptr+1) == '%') { 290 /* %% */ 291 buffer_append_string_len(p->tmp_buf,CONST_STR_LEN("%")); 292 } else if (*(ptr+1) == '_' ) { 293 /* %_ == full hostname */ 294 char *colon = strchr(con->uri.authority->ptr, ':'); 295 296 if(colon == NULL) { 297 buffer_append_string_buffer(p->tmp_buf, con->uri.authority); /* adds fqdn */ 298 } else { 299 /* strip the port out of the authority-part of the URI scheme */ 300 buffer_append_string_len(p->tmp_buf, con->uri.authority->ptr, colon - con->uri.authority->ptr); /* adds fqdn */ 301 } 302 } else if (NULL != (ds = (data_string *)array_get_element(parsed_host,p->conf.path_pieces[i]->ptr))) { 303 buffer_append_string_buffer(p->tmp_buf,ds->value); 304 } else { 305 /* unhandled %-sequence */ 306 } 307 } else { 308 buffer_append_string_buffer(p->tmp_buf,p->conf.path_pieces[i]); 309 } 310 } 311 312 buffer_append_slash(p->tmp_buf); 313 314 array_free(parsed_host); 315 316 if (HANDLER_ERROR == stat_cache_get_entry(srv, con, p->tmp_buf, &sce)) { 317 log_error_write(srv, __FILE__, __LINE__, "sb", strerror(errno), p->tmp_buf); 318 not_good = 1; 319 } else if(!S_ISDIR(sce->st.st_mode)) { 320 log_error_write(srv, __FILE__, __LINE__, "sb", "not a directory:", p->tmp_buf); 321 not_good = 1; 322 } 323 324 if (!not_good) { 325 buffer_copy_buffer(con->physical.doc_root, p->tmp_buf); 326 } 327 328 return HANDLER_GO_ON; 329} 330 331int mod_evhost_plugin_init(plugin *p); 332int mod_evhost_plugin_init(plugin *p) { 333 p->version = LIGHTTPD_VERSION_ID; 334 p->name = buffer_init_string("evhost"); 335 p->init = mod_evhost_init; 336 p->set_defaults = mod_evhost_set_defaults; 337 p->handle_docroot = mod_evhost_uri_handler; 338 p->cleanup = mod_evhost_free; 339 340 p->data = NULL; 341 342 return 0; 343} 344 345/* eof */ 346