src/mod_indexfile.c

   1 #include "first.h"
   2
   3 #include "base.h"
   4 #include "log.h"
   5 #include "buffer.h"
   6 #include "http_header.h"
   7
   8 #include "plugin.h"
   9
  10 #include "stat_cache.h"
  11
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <errno.h>
  15
  16 /* plugin config for all request/connections */
  17
  18 typedef struct {
  19         array *indexfiles;
  20 } plugin_config;
  21
  22 typedef struct {
  23         PLUGIN_DATA;
  24
  25         buffer *tmp_buf;
  26
  27         plugin_config **config_storage;
  28
  29         plugin_config conf;
  30 } plugin_data;
  31
  32 /* init the plugin data */
  33 INIT_FUNC(mod_indexfile_init) {
  34         plugin_data *p;
  35
  36         p = calloc(1, sizeof(*p));
  37
  38         p->tmp_buf = buffer_init();
  39
  40         return p;
  41 }
  42
  43 /* detroy the plugin data */
  44 FREE_FUNC(mod_indexfile_free) {
  45         plugin_data *p = p_d;
  46
  47         UNUSED(srv);
  48
  49         if (!p) return HANDLER_GO_ON;
  50
  51         if (p->config_storage) {
  52                 size_t i;
  53                 for (i = 0; i < srv->config_context->used; i++) {
  54                         plugin_config *s = p->config_storage[i];
  55
  56                         if (NULL == s) continue;
  57
  58                         array_free(s->indexfiles);
  59
  60                         free(s);
  61                 }
  62                 free(p->config_storage);
  63         }
  64
  65         buffer_free(p->tmp_buf);
  66
  67         free(p);
  68
  69         return HANDLER_GO_ON;
  70 }
  71
  72 /* handle plugin config and check values */
  73
  74 SETDEFAULTS_FUNC(mod_indexfile_set_defaults) {
  75         plugin_data *p = p_d;
  76         size_t i = 0;
  77
  78         config_values_t cv[] = {
  79                 { "index-file.names",           NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },       /* 0 */
  80                 { "server.indexfiles",          NULL, T_CONFIG_ARRAY, T_CONFIG_SCOPE_CONNECTION },       /* 1 */
  81                 { NULL,                         NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
  82         };
  83
  84         if (!p) return HANDLER_ERROR;
  85
  86         p->config_storage = calloc(srv->config_context->used, sizeof(plugin_config *));
  87
  88         for (i = 0; i < srv->config_context->used; i++) {
  89                 data_config const* config = (data_config const*)srv->config_context->data[i];
  90                 plugin_config *s;
  91
  92                 s = calloc(1, sizeof(plugin_config));
  93                 s->indexfiles    = array_init();
  94
  95                 cv[0].destination = s->indexfiles;
  96                 cv[1].destination = s->indexfiles; /* old name for [0] */
  97
  98                 p->config_storage[i] = s;
  99
 100                 if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
 101                         return HANDLER_ERROR;
 102                 }
 103
 104                 if (!array_is_vlist(s->indexfiles)) {
 105                         log_error_write(srv, __FILE__, __LINE__, "s",
 106                                         "unexpected value for index-file.names; expected list of \"file\"");
 107                         return HANDLER_ERROR;
 108                 }
 109         }
 110
 111         return HANDLER_GO_ON;
 112 }
 113
 114 #define PATCH(x) \
 115         p->conf.x = s->x;
 116 static int mod_indexfile_patch_connection(server *srv, connection *con, plugin_data *p) {
 117         size_t i, j;
 118         plugin_config *s = p->config_storage[0];
 119
 120         PATCH(indexfiles);
 121
 122         /* skip the first, the global context */
 123         for (i = 1; i < srv->config_context->used; i++) {
 124                 data_config *dc = (data_config *)srv->config_context->data[i];
 125                 s = p->config_storage[i];
 126
 127                 /* condition didn't match */
 128                 if (!config_check_cond(srv, con, dc)) continue;
 129
 130                 /* merge config */
 131                 for (j = 0; j < dc->value->used; j++) {
 132                         data_unset *du = dc->value->data[j];
 133
 134                         if (buffer_is_equal_string(du->key, CONST_STR_LEN("server.indexfiles"))) {
 135                                 PATCH(indexfiles);
 136                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("index-file.names"))) {
 137                                 PATCH(indexfiles);
 138                         }
 139                 }
 140         }
 141
 142         return 0;
 143 }
 144 #undef PATCH
 145
 146 URIHANDLER_FUNC(mod_indexfile_subrequest) {
 147         plugin_data *p = p_d;
 148         size_t k;
 149         stat_cache_entry *sce = NULL;
 150
 151         if (con->mode != DIRECT) return HANDLER_GO_ON;
 152
 153         if (buffer_is_empty(con->uri.path)) return HANDLER_GO_ON;
 154         if (con->uri.path->ptr[buffer_string_length(con->uri.path) - 1] != '/') return HANDLER_GO_ON;
 155
 156         mod_indexfile_patch_connection(srv, con, p);
 157
 158         if (con->conf.log_request_handling) {
 159                 log_error_write(srv, __FILE__, __LINE__,  "s",  "-- handling the request as Indexfile");
 160                 log_error_write(srv, __FILE__, __LINE__,  "sb", "URI          :", con->uri.path);
 161         }
 162
 163         /* indexfile */
 164         for (k = 0; k < p->conf.indexfiles->used; k++) {
 165                 data_string *ds = (data_string *)p->conf.indexfiles->data[k];
 166
 167                 if (ds->value && ds->value->ptr[0] == '/') {
 168                         /* if the index-file starts with a prefix as use this file as
 169                          * index-generator */
 170                         buffer_copy_buffer(p->tmp_buf, con->physical.doc_root);
 171                 } else {
 172                         buffer_copy_buffer(p->tmp_buf, con->physical.path);
 173                 }
 174                 buffer_append_string_buffer(p->tmp_buf, ds->value);
 175
 176                 if (HANDLER_ERROR == stat_cache_get_entry(srv, con, p->tmp_buf, &sce)) {
 177                         if (errno == EACCES) {
 178                                 con->http_status = 403;
 179                                 buffer_reset(con->physical.path);
 180
 181                                 return HANDLER_FINISHED;
 182                         }
 183
 184                         if (errno != ENOENT &&
 185                             errno != ENOTDIR) {
 186                                 /* we have no idea what happend. let's tell the user so. */
 187
 188                                 con->http_status = 500;
 189
 190                                 log_error_write(srv, __FILE__, __LINE__, "ssbsb",
 191                                                 "file not found ... or so: ", strerror(errno),
 192                                                 con->uri.path,
 193                                                 "->", con->physical.path);
 194
 195                                 buffer_reset(con->physical.path);
 196
 197                                 return HANDLER_FINISHED;
 198                         }
 199                         continue;
 200                 }
 201
 202                 if (ds->value && ds->value->ptr[0] == '/') {
 203                         /* replace uri.path */
 204                         buffer_copy_buffer(con->uri.path, ds->value);
 205                         http_header_env_set(con, CONST_STR_LEN("PATH_TRANSLATED_DIRINDEX"), CONST_BUF_LEN(con->physical.path));
 206                 } else {
 207                         /* append to uri.path the relative path to index file (/ -> /index.php) */
 208                         buffer_append_string_buffer(con->uri.path, ds->value);
 209                 }
 210
 211                 buffer_copy_buffer(con->physical.path, p->tmp_buf);
 212
 213                 return HANDLER_GO_ON;
 214         }
 215
 216         /* not found */
 217         return HANDLER_GO_ON;
 218 }
 219
 220 /* this function is called at dlopen() time and inits the callbacks */
 221
 222 int mod_indexfile_plugin_init(plugin *p);
 223 int mod_indexfile_plugin_init(plugin *p) {
 224         p->version     = LIGHTTPD_VERSION_ID;
 225         p->name        = buffer_init_string("indexfile");
 226
 227         p->init        = mod_indexfile_init;
 228         p->handle_subrequest_start = mod_indexfile_subrequest;
 229         p->set_defaults  = mod_indexfile_set_defaults;
 230         p->cleanup     = mod_indexfile_free;
 231
 232         p->data        = NULL;
 233
 234         return 0;
 235 }