Return to mod_alias.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / lighttpd / src

Initial revision

    1: #include "base.h"
    2: #include "log.h"
    3: #include "buffer.h"
    4: 
    5: #include "plugin.h"
    6: 
    7: #include <ctype.h>
    8: #include <stdlib.h>
    9: #include <string.h>
   10: #include <stdio.h>
   11: 
   12: /* plugin config for all request/connections */
   13: typedef struct {
   14: 	array *alias;
   15: } plugin_config;
   16: 
   17: typedef struct {
   18: 	PLUGIN_DATA;
   19: 
   20: 	plugin_config **config_storage;
   21: 
   22: 	plugin_config conf;
   23: } plugin_data;
   24: 
   25: /* init the plugin data */
   26: INIT_FUNC(mod_alias_init) {
   27: 	plugin_data *p;
   28: 
   29: 	p = calloc(1, sizeof(*p));
   30: 
   31: 
   32: 
   33: 	return p;
   34: }
   35: 
   36: /* detroy the plugin data */
   37: FREE_FUNC(mod_alias_free) {
   38: 	plugin_data *p = p_d;
   39: 
   40: 	if (!p) return HANDLER_GO_ON;
   41: 
   42: 	if (p->config_storage) {
   43: 		size_t i;
   44: 
   45: 		for (i = 0; i < srv->config_context->used; i++) {
   46: 			plugin_config *s = p->config_storage[i];
   47: 
   48: 			if(!s) continue;
   49: 
   50: 			array_free(s->alias);
   51: 
   52: 			free(s);
   53: 		}
   54: 		free(p->config_storage);
   55: 	}
   56: 
   57: 	free(p);
   58: 
   59: 	return HANDLER_GO_ON;
   60: }
   61: 
   62: /* handle plugin config and check values */
   63: 
   64: SETDEFAULTS_FUNC(mod_alias_set_defaults) {
   65: 	plugin_data *p = p_d;
   66: 	size_t i = 0;
   67: 
   68: 	config_values_t cv[] = {
   69: 		{ "alias.url",                  NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },       /* 0 */
   70: 		{ NULL,                         NULL, T_CONFIG_UNSET,  T_CONFIG_SCOPE_UNSET }
   71: 	};
   72: 
   73: 	if (!p) return HANDLER_ERROR;
   74: 
   75: 	p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
   76: 
   77: 	for (i = 0; i < srv->config_context->used; i++) {
   78: 		plugin_config *s;
   79: 
   80: 		s = calloc(1, sizeof(plugin_config));
   81: 		s->alias = array_init();
   82: 		cv[0].destination = s->alias;
   83: 
   84: 		p->config_storage[i] = s;
   85: 
   86: 		if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) {
   87: 			return HANDLER_ERROR;
   88: 		}
   89: 		if (s->alias->used >= 2) {
   90: 			const array *a = s->alias;
   91: 			size_t j, k;
   92: 
   93: 			for (j = 0; j < a->used; j ++) {
   94: 				const buffer *prefix = a->data[a->sorted[j]]->key;
   95: 				for (k = j + 1; k < a->used; k ++) {
   96: 					const buffer *key = a->data[a->sorted[k]]->key;
   97: 
   98: 					if (key->used < prefix->used) {
   99: 						break;
  100: 					}
  101: 					if (memcmp(key->ptr, prefix->ptr, prefix->used - 1) != 0) {
  102: 						break;
  103: 					}
  104: 					/* ok, they have same prefix. check position */
  105: 					if (a->sorted[j] < a->sorted[k]) {
  106: 						log_error_write(srv, __FILE__, __LINE__, "SBSBS",
  107: 							"url.alias: `", key, "' will never match as `", prefix, "' matched first");
  108: 						return HANDLER_ERROR;
  109: 					}
  110: 				}
  111: 			}
  112: 		}
  113: 	}
  114: 
  115: 	return HANDLER_GO_ON;
  116: }
  117: 
  118: #define PATCH(x) \
  119: 	p->conf.x = s->x;
  120: static int mod_alias_patch_connection(server *srv, connection *con, plugin_data *p) {
  121: 	size_t i, j;
  122: 	plugin_config *s = p->config_storage[0];
  123: 
  124: 	PATCH(alias);
  125: 
  126: 	/* skip the first, the global context */
  127: 	for (i = 1; i < srv->config_context->used; i++) {
  128: 		data_config *dc = (data_config *)srv->config_context->data[i];
  129: 		s = p->config_storage[i];
  130: 
  131: 		/* condition didn't match */
  132: 		if (!config_check_cond(srv, con, dc)) continue;
  133: 
  134: 		/* merge config */
  135: 		for (j = 0; j < dc->value->used; j++) {
  136: 			data_unset *du = dc->value->data[j];
  137: 
  138: 			if (buffer_is_equal_string(du->key, CONST_STR_LEN("alias.url"))) {
  139: 				PATCH(alias);
  140: 			}
  141: 		}
  142: 	}
  143: 
  144: 	return 0;
  145: }
  146: #undef PATCH
  147: 
  148: PHYSICALPATH_FUNC(mod_alias_physical_handler) {
  149: 	plugin_data *p = p_d;
  150: 	int uri_len, basedir_len;
  151: 	char *uri_ptr;
  152: 	size_t k;
  153: 
  154: 	if (con->physical.path->used == 0) return HANDLER_GO_ON;
  155: 
  156: 	mod_alias_patch_connection(srv, con, p);
  157: 
  158: 	/* not to include the tailing slash */
  159: 	basedir_len = (con->physical.basedir->used - 1);
  160: 	if ('/' == con->physical.basedir->ptr[basedir_len-1]) --basedir_len;
  161: 	uri_len = con->physical.path->used - 1 - basedir_len;
  162: 	uri_ptr = con->physical.path->ptr + basedir_len;
  163: 
  164: 	for (k = 0; k < p->conf.alias->used; k++) {
  165: 		data_string *ds = (data_string *)p->conf.alias->data[k];
  166: 		int alias_len = ds->key->used - 1;
  167: 
  168: 		if (alias_len > uri_len) continue;
  169: 		if (ds->key->used == 0) continue;
  170: 
  171: 		if (0 == (con->conf.force_lowercase_filenames ?
  172: 					strncasecmp(uri_ptr, ds->key->ptr, alias_len) :
  173: 					strncmp(uri_ptr, ds->key->ptr, alias_len))) {
  174: 			/* matched */
  175: 
  176: 			buffer_copy_string_buffer(con->physical.basedir, ds->value);
  177: 			buffer_copy_string_buffer(srv->tmp_buf, ds->value);
  178: 			buffer_append_string(srv->tmp_buf, uri_ptr + alias_len);
  179: 			buffer_copy_string_buffer(con->physical.path, srv->tmp_buf);
  180: 
  181: 			return HANDLER_GO_ON;
  182: 		}
  183: 	}
  184: 
  185: 	/* not found */
  186: 	return HANDLER_GO_ON;
  187: }
  188: 
  189: /* this function is called at dlopen() time and inits the callbacks */
  190: 
  191: int mod_alias_plugin_init(plugin *p);
  192: int mod_alias_plugin_init(plugin *p) {
  193: 	p->version     = LIGHTTPD_VERSION_ID;
  194: 	p->name        = buffer_init_string("alias");
  195: 
  196: 	p->init           = mod_alias_init;
  197: 	p->handle_physical= mod_alias_physical_handler;
  198: 	p->set_defaults   = mod_alias_set_defaults;
  199: 	p->cleanup        = mod_alias_free;
  200: 
  201: 	p->data        = NULL;
  202: 
  203: 	return 0;
  204: }