| #include <ctype.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <stdio.h> |
| |
| #include "base.h" |
| #include "log.h" |
| #include "buffer.h" |
| |
| #include "plugin.h" |
| |
| /* plugin config for all request/connections */ |
| typedef struct { |
| array *alias; |
| } plugin_config; |
| |
| typedef struct { |
| PLUGIN_DATA; |
| |
| plugin_config **config_storage; |
| |
| plugin_config conf; |
| } plugin_data; |
| |
| /* init the plugin data */ |
| INIT_FUNC(mod_alias_init) { |
| plugin_data *p; |
| |
| p = calloc(1, sizeof(*p)); |
| |
| |
| |
| return p; |
| } |
| |
| /* detroy the plugin data */ |
| FREE_FUNC(mod_alias_free) { |
| plugin_data *p = p_d; |
| |
| if (!p) return HANDLER_GO_ON; |
| |
| if (p->config_storage) { |
| size_t i; |
| |
| for (i = 0; i < srv->config_context->used; i++) { |
| plugin_config *s = p->config_storage[i]; |
| |
| if(!s) continue; |
| |
| array_free(s->alias); |
| |
| free(s); |
| } |
| free(p->config_storage); |
| } |
| |
| free(p); |
| |
| return HANDLER_GO_ON; |
| } |
| |
| /* handle plugin config and check values */ |
| |
| SETDEFAULTS_FUNC(mod_alias_set_defaults) { |
| plugin_data *p = p_d; |
| size_t i = 0; |
| |
| config_values_t cv[] = { |
| { "alias.url", NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION }, /* 0 */ |
| { NULL, NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET } |
| }; |
| |
| if (!p) return HANDLER_ERROR; |
| |
| p->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *)); |
| |
| for (i = 0; i < srv->config_context->used; i++) { |
| plugin_config *s; |
| |
| s = calloc(1, sizeof(plugin_config)); |
| s->alias = array_init(); |
| cv[0].destination = s->alias; |
| |
| p->config_storage[i] = s; |
| |
| if (0 != config_insert_values_global(srv, ((data_config *)srv->config_context->data[i])->value, cv)) { |
| return HANDLER_ERROR; |
| } |
| if (s->alias->used >= 2) { |
| const array *a = s->alias; |
| size_t j, k; |
| |
| for (j = 0; j < a->used; j ++) { |
| const buffer *prefix = a->data[a->sorted[j]]->key; |
| for (k = j + 1; k < a->used; k ++) { |
| const buffer *key = a->data[a->sorted[k]]->key; |
| |
| if (key->used < prefix->used) { |
| break; |
| } |
| if (memcmp(key->ptr, prefix->ptr, prefix->used - 1) != 0) { |
| break; |
| } |
| /* ok, they have same prefix. check position */ |
| if (a->sorted[j] < a->sorted[k]) { |
| fprintf(stderr, "url.alias: `%s' will never match as `%s' matched first\n", |
| key->ptr, |
| prefix->ptr); |
| return HANDLER_ERROR; |
| } |
| } |
| } |
| } |
| } |
| |
| return HANDLER_GO_ON; |
| } |
| |
| #define PATCH(x) \ |
| p->conf.x = s->x; |
| static int mod_alias_patch_connection(server *srv, connection *con, plugin_data *p) { |
| size_t i, j; |
| plugin_config *s = p->config_storage[0]; |
| |
| PATCH(alias); |
| |
| /* skip the first, the global context */ |
| for (i = 1; i < srv->config_context->used; i++) { |
| data_config *dc = (data_config *)srv->config_context->data[i]; |
| s = p->config_storage[i]; |
| |
| /* condition didn't match */ |
| if (!config_check_cond(srv, con, dc)) continue; |
| |
| /* merge config */ |
| for (j = 0; j < dc->value->used; j++) { |
| data_unset *du = dc->value->data[j]; |
| |
| if (buffer_is_equal_string(du->key, CONST_STR_LEN("alias.url"))) { |
| PATCH(alias); |
| } |
| } |
| } |
| |
| return 0; |
| } |
| #undef PATCH |
| |
| PHYSICALPATH_FUNC(mod_alias_physical_handler) { |
| plugin_data *p = p_d; |
| int uri_len, basedir_len; |
| char *uri_ptr; |
| size_t k; |
| |
| if (con->physical.path->used == 0) return HANDLER_GO_ON; |
| |
| mod_alias_patch_connection(srv, con, p); |
| |
| /* not to include the tailing slash */ |
| basedir_len = (con->physical.basedir->used - 1) - 1; |
| uri_len = con->physical.path->used - 1 - basedir_len; |
| uri_ptr = con->physical.path->ptr + basedir_len; |
| |
| for (k = 0; k < p->conf.alias->used; k++) { |
| data_string *ds = (data_string *)p->conf.alias->data[k]; |
| int alias_len = ds->key->used - 1; |
| |
| if (alias_len > uri_len) continue; |
| if (ds->key->used == 0) continue; |
| |
| if (0 == (con->conf.force_lowercase_filenames ? |
| strncasecmp(uri_ptr, ds->key->ptr, alias_len) : |
| strncmp(uri_ptr, ds->key->ptr, alias_len))) { |
| /* matched */ |
| |
| buffer_copy_string_buffer(con->physical.basedir, ds->value); |
| buffer_copy_string_buffer(srv->tmp_buf, ds->value); |
| buffer_append_string(srv->tmp_buf, uri_ptr + alias_len); |
| buffer_copy_string_buffer(con->physical.path, srv->tmp_buf); |
| |
| return HANDLER_GO_ON; |
| } |
| } |
| |
| /* not found */ |
| return HANDLER_GO_ON; |
| } |
| |
| /* this function is called at dlopen() time and inits the callbacks */ |
| |
| int mod_alias_plugin_init(plugin *p) { |
| p->version = LIGHTTPD_VERSION_ID; |
| p->name = buffer_init_string("alias"); |
| |
| p->init = mod_alias_init; |
| p->handle_physical= mod_alias_physical_handler; |
| p->set_defaults = mod_alias_set_defaults; |
| p->cleanup = mod_alias_free; |
| |
| p->data = NULL; |
| |
| return 0; |
| } |