src/mod_indexfile.c

   1 #include "first.h"
   2
   3 #include "base.h"
   4 #include "log.h"
   5 #include "buffer.h"
   6
   7 #include "plugin.h"
   8
   9 #include "stat_cache.h"
  10
  11 #include <ctype.h>
  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(1, 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
 105         return HANDLER_GO_ON;
 106 }
 107
 108 #define PATCH(x) \
 109         p->conf.x = s->x;
 110 static int mod_indexfile_patch_connection(server *srv, connection *con, plugin_data *p) {
 111         size_t i, j;
 112         plugin_config *s = p->config_storage[0];
 113
 114         PATCH(indexfiles);
 115
 116         /* skip the first, the global context */
 117         for (i = 1; i < srv->config_context->used; i++) {
 118                 data_config *dc = (data_config *)srv->config_context->data[i];
 119                 s = p->config_storage[i];
 120
 121                 /* condition didn't match */
 122                 if (!config_check_cond(srv, con, dc)) continue;
 123
 124                 /* merge config */
 125                 for (j = 0; j < dc->value->used; j++) {
 126                         data_unset *du = dc->value->data[j];
 127
 128                         if (buffer_is_equal_string(du->key, CONST_STR_LEN("server.indexfiles"))) {
 129                                 PATCH(indexfiles);
 130                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN("index-file.names"))) {
 131                                 PATCH(indexfiles);
 132                         }
 133                 }
 134         }
 135
 136         return 0;
 137 }
 138 #undef PATCH
 139
 140 URIHANDLER_FUNC(mod_indexfile_subrequest) {
 141         plugin_data *p = p_d;
 142         size_t k;
 143         stat_cache_entry *sce = NULL;
 144
 145         if (con->mode != DIRECT) return HANDLER_GO_ON;
 146
 147         if (buffer_is_empty(con->uri.path)) return HANDLER_GO_ON;
 148         if (con->uri.path->ptr[buffer_string_length(con->uri.path) - 1] != '/') return HANDLER_GO_ON;
 149
 150         mod_indexfile_patch_connection(srv, con, p);
 151
 152         if (con->conf.log_request_handling) {
 153                 log_error_write(srv, __FILE__, __LINE__,  "s",  "-- handling the request as Indexfile");
 154                 log_error_write(srv, __FILE__, __LINE__,  "sb", "URI          :", con->uri.path);
 155         }
 156
 157         /* indexfile */
 158         for (k = 0; k < p->conf.indexfiles->used; k++) {
 159                 data_string *ds = (data_string *)p->conf.indexfiles->data[k];
 160
 161                 if (ds->value && ds->value->ptr[0] == '/') {
 162                         /* if the index-file starts with a prefix as use this file as
 163                          * index-generator */
 164                         buffer_copy_buffer(p->tmp_buf, con->physical.doc_root);
 165                 } else {
 166                         buffer_copy_buffer(p->tmp_buf, con->physical.path);
 167                 }
 168                 buffer_append_string_buffer(p->tmp_buf, ds->value);
 169
 170                 if (HANDLER_ERROR == stat_cache_get_entry(srv, con, p->tmp_buf, &sce)) {
 171                         if (errno == EACCES) {
 172                                 con->http_status = 403;
 173                                 buffer_reset(con->physical.path);
 174
 175                                 return HANDLER_FINISHED;
 176                         }
 177
 178                         if (errno != ENOENT &&
 179                             errno != ENOTDIR) {
 180                                 /* we have no idea what happend. let's tell the user so. */
 181
 182                                 con->http_status = 500;
 183
 184                                 log_error_write(srv, __FILE__, __LINE__, "ssbsb",
 185                                                 "file not found ... or so: ", strerror(errno),
 186                                                 con->uri.path,
 187                                                 "->", con->physical.path);
 188
 189                                 buffer_reset(con->physical.path);
 190
 191                                 return HANDLER_FINISHED;
 192                         }
 193                         continue;
 194                 }
 195
 196                 if (ds->value && ds->value->ptr[0] == '/') {
 197                         /* replace uri.path */
 198                         buffer_copy_buffer(con->uri.path, ds->value);
 199
 200                         if (NULL == (ds = (data_string *)array_get_unused_element(con->environment, TYPE_STRING))) {
 201                                 ds = data_string_init();
 202                         }
 203                         buffer_copy_string_len(ds->key, CONST_STR_LEN("PATH_TRANSLATED_DIRINDEX"));
 204                         buffer_copy_buffer(ds->value, con->physical.path);
 205                         array_insert_unique(con->environment, (data_unset *)ds);
 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 }