src/mod_dirlisting.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 "response.h"
  10 #include "stat_cache.h"
  11 #include "stream.h"
  12
  13 #include <ctype.h>
  14 #include <stdlib.h>
  15 #include <string.h>
  16 #include <dirent.h>
  17 #include <assert.h>
  18 #include <errno.h>
  19 #include <fcntl.h>
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <time.h>
  23
  24 /**
  25  * this is a dirlisting for a lighttpd plugin
  26  */
  27
  28 #ifdef HAVE_ATTR_ATTRIBUTES_H
  29 #include <attr/attributes.h>
  30 #endif
  31
  32 #ifdef HAVE_SYS_EXTATTR_H
  33 #include <sys/extattr.h>
  34 #endif
  35
  36 #include "version.h"
  37
  38 /* plugin config for all request/connections */
  39
  40 typedef struct {
  41 #ifdef HAVE_PCRE_H
  42         pcre *regex;
  43 #endif
  44         buffer *string;
  45 } excludes;
  46
  47 typedef struct {
  48         excludes **ptr;
  49
  50         size_t used;
  51         size_t size;
  52 } excludes_buffer;
  53
  54 typedef struct {
  55         unsigned short dir_listing;
  56         unsigned short hide_dot_files;
  57         unsigned short show_readme;
  58         unsigned short hide_readme_file;
  59         unsigned short encode_readme;
  60         unsigned short show_header;
  61         unsigned short hide_header_file;
  62         unsigned short encode_header;
  63         unsigned short auto_layout;
  64
  65         excludes_buffer *excludes;
  66
  67         buffer *external_css;
  68         buffer *encoding;
  69         buffer *set_footer;
  70 } plugin_config;
  71
  72 typedef struct {
  73         PLUGIN_DATA;
  74
  75         buffer *tmp_buf;
  76         buffer *content_charset;
  77
  78         plugin_config **config_storage;
  79
  80         plugin_config conf;
  81 } plugin_data;
  82
  83 static excludes_buffer *excludes_buffer_init(void) {
  84         excludes_buffer *exb;
  85
  86         exb = calloc(1, sizeof(*exb));
  87
  88         return exb;
  89 }
  90
  91 static int excludes_buffer_append(excludes_buffer *exb, buffer *string) {
  92 #ifdef HAVE_PCRE_H
  93         size_t i;
  94         const char *errptr;
  95         int erroff;
  96
  97         if (!string) return -1;
  98
  99         if (exb->size == 0) {
 100                 exb->size = 4;
 101                 exb->used = 0;
 102
 103                 exb->ptr = malloc(exb->size * sizeof(*exb->ptr));
 104
 105                 for(i = 0; i < exb->size ; i++) {
 106                         exb->ptr[i] = calloc(1, sizeof(**exb->ptr));
 107                 }
 108         } else if (exb->used == exb->size) {
 109                 exb->size += 4;
 110
 111                 exb->ptr = realloc(exb->ptr, exb->size * sizeof(*exb->ptr));
 112
 113                 for(i = exb->used; i < exb->size; i++) {
 114                         exb->ptr[i] = calloc(1, sizeof(**exb->ptr));
 115                 }
 116         }
 117
 118
 119         if (NULL == (exb->ptr[exb->used]->regex = pcre_compile(string->ptr, 0,
 120                                                     &errptr, &erroff, NULL))) {
 121                 return -1;
 122         }
 123
 124         exb->ptr[exb->used]->string = buffer_init();
 125         buffer_copy_buffer(exb->ptr[exb->used]->string, string);
 126
 127         exb->used++;
 128
 129         return 0;
 130 #else
 131         UNUSED(exb);
 132         UNUSED(string);
 133
 134         return -1;
 135 #endif
 136 }
 137
 138 static void excludes_buffer_free(excludes_buffer *exb) {
 139 #ifdef HAVE_PCRE_H
 140         size_t i;
 141
 142         for (i = 0; i < exb->size; i++) {
 143                 if (exb->ptr[i]->regex) pcre_free(exb->ptr[i]->regex);
 144                 if (exb->ptr[i]->string) buffer_free(exb->ptr[i]->string);
 145                 free(exb->ptr[i]);
 146         }
 147
 148         if (exb->ptr) free(exb->ptr);
 149 #endif
 150
 151         free(exb);
 152 }
 153
 154 /* init the plugin data */
 155 INIT_FUNC(mod_dirlisting_init) {
 156         plugin_data *p;
 157
 158         p = calloc(1, sizeof(*p));
 159
 160         p->tmp_buf = buffer_init();
 161         p->content_charset = buffer_init();
 162
 163         return p;
 164 }
 165
 166 /* detroy the plugin data */
 167 FREE_FUNC(mod_dirlisting_free) {
 168         plugin_data *p = p_d;
 169
 170         UNUSED(srv);
 171
 172         if (!p) return HANDLER_GO_ON;
 173
 174         if (p->config_storage) {
 175                 size_t i;
 176                 for (i = 0; i < srv->config_context->used; i++) {
 177                         plugin_config *s = p->config_storage[i];
 178
 179                         if (!s) continue;
 180
 181                         excludes_buffer_free(s->excludes);
 182                         buffer_free(s->external_css);
 183                         buffer_free(s->encoding);
 184                         buffer_free(s->set_footer);
 185
 186                         free(s);
 187                 }
 188                 free(p->config_storage);
 189         }
 190
 191         buffer_free(p->tmp_buf);
 192         buffer_free(p->content_charset);
 193
 194         free(p);
 195
 196         return HANDLER_GO_ON;
 197 }
 198
 199 /* handle plugin config and check values */
 200
 201 #define CONFIG_EXCLUDE          "dir-listing.exclude"
 202 #define CONFIG_ACTIVATE         "dir-listing.activate"
 203 #define CONFIG_HIDE_DOTFILES    "dir-listing.hide-dotfiles"
 204 #define CONFIG_EXTERNAL_CSS     "dir-listing.external-css"
 205 #define CONFIG_ENCODING         "dir-listing.encoding"
 206 #define CONFIG_SHOW_README      "dir-listing.show-readme"
 207 #define CONFIG_HIDE_README_FILE "dir-listing.hide-readme-file"
 208 #define CONFIG_SHOW_HEADER      "dir-listing.show-header"
 209 #define CONFIG_HIDE_HEADER_FILE "dir-listing.hide-header-file"
 210 #define CONFIG_DIR_LISTING      "server.dir-listing"
 211 #define CONFIG_SET_FOOTER       "dir-listing.set-footer"
 212 #define CONFIG_ENCODE_README    "dir-listing.encode-readme"
 213 #define CONFIG_ENCODE_HEADER    "dir-listing.encode-header"
 214 #define CONFIG_AUTO_LAYOUT      "dir-listing.auto-layout"
 215
 216
 217 SETDEFAULTS_FUNC(mod_dirlisting_set_defaults) {
 218         plugin_data *p = p_d;
 219         size_t i = 0;
 220
 221         config_values_t cv[] = {
 222                 { CONFIG_EXCLUDE,          NULL, T_CONFIG_LOCAL, T_CONFIG_SCOPE_CONNECTION },   /* 0 */
 223                 { CONFIG_ACTIVATE,         NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 1 */
 224                 { CONFIG_HIDE_DOTFILES,    NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 2 */
 225                 { CONFIG_EXTERNAL_CSS,     NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },  /* 3 */
 226                 { CONFIG_ENCODING,         NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },  /* 4 */
 227                 { CONFIG_SHOW_README,      NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 5 */
 228                 { CONFIG_HIDE_README_FILE, NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 6 */
 229                 { CONFIG_SHOW_HEADER,      NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 7 */
 230                 { CONFIG_HIDE_HEADER_FILE, NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 8 */
 231                 { CONFIG_DIR_LISTING,      NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 9 */
 232                 { CONFIG_SET_FOOTER,       NULL, T_CONFIG_STRING, T_CONFIG_SCOPE_CONNECTION },  /* 10 */
 233                 { CONFIG_ENCODE_README,    NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 11 */
 234                 { CONFIG_ENCODE_HEADER,    NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 12 */
 235                 { CONFIG_AUTO_LAYOUT,      NULL, T_CONFIG_BOOLEAN, T_CONFIG_SCOPE_CONNECTION }, /* 13 */
 236
 237                 { NULL,                          NULL, T_CONFIG_UNSET, T_CONFIG_SCOPE_UNSET }
 238         };
 239
 240         if (!p) return HANDLER_ERROR;
 241
 242         p->config_storage = calloc(1, srv->config_context->used * sizeof(plugin_config *));
 243
 244         for (i = 0; i < srv->config_context->used; i++) {
 245                 data_config const* config = (data_config const*)srv->config_context->data[i];
 246                 plugin_config *s;
 247                 data_unset *du_excludes;
 248
 249                 s = calloc(1, sizeof(plugin_config));
 250                 s->excludes = excludes_buffer_init();
 251                 s->dir_listing = 0;
 252                 s->external_css = buffer_init();
 253                 s->hide_dot_files = 1;
 254                 s->show_readme = 0;
 255                 s->hide_readme_file = 0;
 256                 s->show_header = 0;
 257                 s->hide_header_file = 0;
 258                 s->encode_readme = 1;
 259                 s->encode_header = 1;
 260                 s->auto_layout = 1;
 261
 262                 s->encoding = buffer_init();
 263                 s->set_footer = buffer_init();
 264
 265                 cv[0].destination = s->excludes;
 266                 cv[1].destination = &(s->dir_listing);
 267                 cv[2].destination = &(s->hide_dot_files);
 268                 cv[3].destination = s->external_css;
 269                 cv[4].destination = s->encoding;
 270                 cv[5].destination = &(s->show_readme);
 271                 cv[6].destination = &(s->hide_readme_file);
 272                 cv[7].destination = &(s->show_header);
 273                 cv[8].destination = &(s->hide_header_file);
 274                 cv[9].destination = &(s->dir_listing); /* old name */
 275                 cv[10].destination = s->set_footer;
 276                 cv[11].destination = &(s->encode_readme);
 277                 cv[12].destination = &(s->encode_header);
 278                 cv[13].destination = &(s->auto_layout);
 279
 280                 p->config_storage[i] = s;
 281
 282                 if (0 != config_insert_values_global(srv, config->value, cv, i == 0 ? T_CONFIG_SCOPE_SERVER : T_CONFIG_SCOPE_CONNECTION)) {
 283                         return HANDLER_ERROR;
 284                 }
 285
 286                 if (NULL != (du_excludes = array_get_element(config->value, CONFIG_EXCLUDE))) {
 287                         array *excludes_list;
 288                         size_t j;
 289
 290                         if (du_excludes->type != TYPE_ARRAY) {
 291                                 log_error_write(srv, __FILE__, __LINE__, "sss",
 292                                         "unexpected type for key: ", CONFIG_EXCLUDE, "array of strings");
 293                                 return HANDLER_ERROR;
 294                         }
 295
 296                         excludes_list = ((data_array*)du_excludes)->value;
 297
 298 #ifndef HAVE_PCRE_H
 299                         if (excludes_list->used > 0) {
 300                                 log_error_write(srv, __FILE__, __LINE__, "sss",
 301                                         "pcre support is missing for: ", CONFIG_EXCLUDE, ", please install libpcre and the headers");
 302                                 return HANDLER_ERROR;
 303                         }
 304 #else
 305                         for (j = 0; j < excludes_list->used; j++) {
 306                                 data_unset *du_exclude = excludes_list->data[j];
 307
 308                                 if (du_exclude->type != TYPE_STRING) {
 309                                         log_error_write(srv, __FILE__, __LINE__, "sssbs",
 310                                                 "unexpected type for key: ", CONFIG_EXCLUDE, "[",
 311                                                 du_exclude->key, "](string)");
 312                                         return HANDLER_ERROR;
 313                                 }
 314
 315                                 if (0 != excludes_buffer_append(s->excludes, ((data_string*)(du_exclude))->value)) {
 316                                         log_error_write(srv, __FILE__, __LINE__, "sb",
 317                                                 "pcre-compile failed for", ((data_string*)(du_exclude))->value);
 318                                         return HANDLER_ERROR;
 319                                 }
 320                         }
 321 #endif
 322                 }
 323         }
 324
 325         return HANDLER_GO_ON;
 326 }
 327
 328 #define PATCH(x) \
 329         p->conf.x = s->x;
 330 static int mod_dirlisting_patch_connection(server *srv, connection *con, plugin_data *p) {
 331         size_t i, j;
 332         plugin_config *s = p->config_storage[0];
 333
 334         PATCH(dir_listing);
 335         PATCH(external_css);
 336         PATCH(hide_dot_files);
 337         PATCH(encoding);
 338         PATCH(show_readme);
 339         PATCH(hide_readme_file);
 340         PATCH(show_header);
 341         PATCH(hide_header_file);
 342         PATCH(excludes);
 343         PATCH(set_footer);
 344         PATCH(encode_readme);
 345         PATCH(encode_header);
 346         PATCH(auto_layout);
 347
 348         /* skip the first, the global context */
 349         for (i = 1; i < srv->config_context->used; i++) {
 350                 data_config *dc = (data_config *)srv->config_context->data[i];
 351                 s = p->config_storage[i];
 352
 353                 /* condition didn't match */
 354                 if (!config_check_cond(srv, con, dc)) continue;
 355
 356                 /* merge config */
 357                 for (j = 0; j < dc->value->used; j++) {
 358                         data_unset *du = dc->value->data[j];
 359
 360                         if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_ACTIVATE)) ||
 361                             buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_DIR_LISTING))) {
 362                                 PATCH(dir_listing);
 363                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_HIDE_DOTFILES))) {
 364                                 PATCH(hide_dot_files);
 365                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_EXTERNAL_CSS))) {
 366                                 PATCH(external_css);
 367                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_ENCODING))) {
 368                                 PATCH(encoding);
 369                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_SHOW_README))) {
 370                                 PATCH(show_readme);
 371                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_HIDE_README_FILE))) {
 372                                 PATCH(hide_readme_file);
 373                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_SHOW_HEADER))) {
 374                                 PATCH(show_header);
 375                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_HIDE_HEADER_FILE))) {
 376                                 PATCH(hide_header_file);
 377                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_SET_FOOTER))) {
 378                                 PATCH(set_footer);
 379                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_EXCLUDE))) {
 380                                 PATCH(excludes);
 381                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_ENCODE_README))) {
 382                                 PATCH(encode_readme);
 383                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_ENCODE_HEADER))) {
 384                                 PATCH(encode_header);
 385                         } else if (buffer_is_equal_string(du->key, CONST_STR_LEN(CONFIG_AUTO_LAYOUT))) {
 386                                 PATCH(auto_layout);
 387                         }
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393 #undef PATCH
 394
 395 typedef struct {
 396         size_t  namelen;
 397         time_t  mtime;
 398         off_t   size;
 399 } dirls_entry_t;
 400
 401 typedef struct {
 402         dirls_entry_t **ent;
 403         size_t used;
 404         size_t size;
 405 } dirls_list_t;
 406
 407 #define DIRLIST_ENT_NAME(ent)   ((char*)(ent) + sizeof(dirls_entry_t))
 408 #define DIRLIST_BLOB_SIZE               16
 409
 410 /* simple combsort algorithm */
 411 static void http_dirls_sort(dirls_entry_t **ent, int num) {
 412         int gap = num;
 413         int i, j;
 414         int swapped;
 415         dirls_entry_t *tmp;
 416
 417         do {
 418                 gap = (gap * 10) / 13;
 419                 if (gap == 9 || gap == 10)
 420                         gap = 11;
 421                 if (gap < 1)
 422                         gap = 1;
 423                 swapped = 0;
 424
 425                 for (i = 0; i < num - gap; i++) {
 426                         j = i + gap;
 427                         if (strcmp(DIRLIST_ENT_NAME(ent[i]), DIRLIST_ENT_NAME(ent[j])) > 0) {
 428                                 tmp = ent[i];
 429                                 ent[i] = ent[j];
 430                                 ent[j] = tmp;
 431                                 swapped = 1;
 432                         }
 433                 }
 434
 435         } while (gap > 1 || swapped);
 436 }
 437
 438 /* buffer must be able to hold "999.9K"
 439  * conversion is simple but not perfect
 440  */
 441 static int http_list_directory_sizefmt(char *buf, size_t bufsz, off_t size) {
 442         const char unit[] = "KMGTPE";   /* Kilo, Mega, Tera, Peta, Exa */
 443         const char *u = unit - 1;               /* u will always increment at least once */
 444         int remain;
 445         size_t buflen;
 446
 447         if (size < 100)
 448                 size += 99;
 449         if (size < 100)
 450                 size = 0;
 451
 452         while (1) {
 453                 remain = (int) size & 1023;
 454                 size >>= 10;
 455                 u++;
 456                 if ((size & (~0 ^ 1023)) == 0)
 457                         break;
 458         }
 459
 460         remain /= 100;
 461         if (remain > 9)
 462                 remain = 9;
 463         if (size > 999) {
 464                 size   = 0;
 465                 remain = 9;
 466                 u++;
 467         }
 468
 469         li_itostrn(buf, bufsz, size);
 470         buflen = strlen(buf);
 471         if (buflen + 3 >= bufsz) return buflen;
 472         buf[buflen+0] = '.';
 473         buf[buflen+1] = remain + '0';
 474         buf[buflen+2] = *u;
 475         buf[buflen+3] = '\0';
 476
 477         return buflen + 3;
 478 }
 479
 480 /* don't want to block when open()ing a fifo */
 481 #if defined(O_NONBLOCK)
 482 # define FIFO_NONBLOCK O_NONBLOCK
 483 #else
 484 # define FIFO_NONBLOCK 0
 485 #endif
 486
 487 static void http_list_directory_include_file(buffer *out, buffer *path, const char *classname, int encode) {
 488         int fd = open(path->ptr, O_RDONLY | FIFO_NONBLOCK);
 489         ssize_t rd;
 490         char buf[8192];
 491
 492         if (-1 == fd) return;
 493
 494         if (encode) {
 495                 buffer_append_string_len(out, CONST_STR_LEN("<pre class=\""));
 496                 buffer_append_string(out, classname);
 497                 buffer_append_string_len(out, CONST_STR_LEN("\">"));
 498         }
 499
 500         while ((rd = read(fd, buf, sizeof(buf))) > 0) {
 501                 if (encode) {
 502                         buffer_append_string_encoded(out, buf, (size_t)rd, ENCODING_MINIMAL_XML);
 503                 } else {
 504                         buffer_append_string_len(out, buf, (size_t)rd);
 505                 }
 506         }
 507
 508         if (encode) {
 509                 buffer_append_string_len(out, CONST_STR_LEN("</pre>"));
 510         }
 511 }
 512
 513 static void http_list_directory_header(server *srv, connection *con, plugin_data *p, buffer *out) {
 514         UNUSED(srv);
 515
 516         if (p->conf.auto_layout) {
 517                 buffer_append_string_len(out, CONST_STR_LEN(
 518                         "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.1//EN\" \"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd\">\n"
 519                         "<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\">\n"
 520                         "<head>\n"
 521                         "<title>Index of "
 522                 ));
 523                 buffer_append_string_encoded(out, CONST_BUF_LEN(con->uri.path), ENCODING_MINIMAL_XML);
 524                 buffer_append_string_len(out, CONST_STR_LEN("</title>\n"));
 525
 526                 if (!buffer_string_is_empty(p->conf.external_css)) {
 527                         buffer_append_string_len(out, CONST_STR_LEN("<link rel=\"stylesheet\" type=\"text/css\" href=\""));
 528                         buffer_append_string_buffer(out, p->conf.external_css);
 529                         buffer_append_string_len(out, CONST_STR_LEN("\" />\n"));
 530                 } else {
 531                         buffer_append_string_len(out, CONST_STR_LEN(
 532                                 "<style type=\"text/css\">\n"
 533                                 "a, a:active {text-decoration: none; color: blue;}\n"
 534                                 "a:visited {color: #48468F;}\n"
 535                                 "a:hover, a:focus {text-decoration: underline; color: red;}\n"
 536                                 "body {background-color: #F5F5F5;}\n"
 537                                 "h2 {margin-bottom: 12px;}\n"
 538                                 "table {margin-left: 12px;}\n"
 539                                 "th, td {"
 540                                 " font: 90% monospace;"
 541                                 " text-align: left;"
 542                                 "}\n"
 543                                 "th {"
 544                                 " font-weight: bold;"
 545                                 " padding-right: 14px;"
 546                                 " padding-bottom: 3px;"
 547                                 "}\n"
 548                                 "td {padding-right: 14px;}\n"
 549                                 "td.s, th.s {text-align: right;}\n"
 550                                 "div.list {"
 551                                 " background-color: white;"
 552                                 " border-top: 1px solid #646464;"
 553                                 " border-bottom: 1px solid #646464;"
 554                                 " padding-top: 10px;"
 555                                 " padding-bottom: 14px;"
 556                                 "}\n"
 557                                 "div.foot {"
 558                                 " font: 90% monospace;"
 559                                 " color: #787878;"
 560                                 " padding-top: 4px;"
 561                                 "}\n"
 562                                 "</style>\n"
 563                         ));
 564                 }
 565
 566                 buffer_append_string_len(out, CONST_STR_LEN("</head>\n<body>\n"));
 567         }
 568
 569         /* HEADER.txt */
 570         if (p->conf.show_header) {
 571                 /* if we have a HEADER file, display it in <pre class="header"></pre> */
 572
 573                 buffer_copy_buffer(p->tmp_buf, con->physical.path);
 574                 buffer_append_slash(p->tmp_buf);
 575                 buffer_append_string_len(p->tmp_buf, CONST_STR_LEN("HEADER.txt"));
 576
 577                 http_list_directory_include_file(out, p->tmp_buf, "header", p->conf.encode_header);
 578         }
 579
 580         buffer_append_string_len(out, CONST_STR_LEN("<h2>Index of "));
 581         buffer_append_string_encoded(out, CONST_BUF_LEN(con->uri.path), ENCODING_MINIMAL_XML);
 582         buffer_append_string_len(out, CONST_STR_LEN(
 583                 "</h2>\n"
 584                 "<div class=\"list\">\n"
 585                 "<table summary=\"Directory Listing\" cellpadding=\"0\" cellspacing=\"0\">\n"
 586                 "<thead>"
 587                 "<tr>"
 588                         "<th class=\"n\">Name</th>"
 589                         "<th class=\"m\">Last Modified</th>"
 590                         "<th class=\"s\">Size</th>"
 591                         "<th class=\"t\">Type</th>"
 592                 "</tr>"
 593                 "</thead>\n"
 594                 "<tbody>\n"
 595                 "<tr class=\"d\">"
 596                         "<td class=\"n\"><a href=\"../\">Parent Directory</a>/</td>"
 597                         "<td class=\"m\">&nbsp;</td>"
 598                         "<td class=\"s\">- &nbsp;</td>"
 599                         "<td class=\"t\">Directory</td>"
 600                 "</tr>\n"
 601         ));
 602 }
 603
 604 static void http_list_directory_footer(server *srv, connection *con, plugin_data *p, buffer *out) {
 605         UNUSED(srv);
 606
 607         buffer_append_string_len(out, CONST_STR_LEN(
 608                 "</tbody>\n"
 609                 "</table>\n"
 610                 "</div>\n"
 611         ));
 612
 613         if (p->conf.show_readme) {
 614                 /* if we have a README file, display it in <pre class="readme"></pre> */
 615
 616                 buffer_copy_buffer(p->tmp_buf,  con->physical.path);
 617                 buffer_append_slash(p->tmp_buf);
 618                 buffer_append_string_len(p->tmp_buf, CONST_STR_LEN("README.txt"));
 619
 620                 http_list_directory_include_file(out, p->tmp_buf, "readme", p->conf.encode_readme);
 621         }
 622
 623         if(p->conf.auto_layout) {
 624                 buffer_append_string_len(out, CONST_STR_LEN(
 625                         "<div class=\"foot\">"
 626                 ));
 627
 628                 if (!buffer_string_is_empty(p->conf.set_footer)) {
 629                         buffer_append_string_buffer(out, p->conf.set_footer);
 630                 } else if (buffer_is_empty(con->conf.server_tag)) {
 631                         buffer_append_string_len(out, CONST_STR_LEN(PACKAGE_DESC));
 632                 } else {
 633                         buffer_append_string_buffer(out, con->conf.server_tag);
 634                 }
 635
 636                 buffer_append_string_len(out, CONST_STR_LEN(
 637                         "</div>\n"
 638                         "</body>\n"
 639                         "</html>\n"
 640                 ));
 641         }
 642 }
 643
 644 static int http_list_directory(server *srv, connection *con, plugin_data *p, buffer *dir) {
 645         DIR *dp;
 646         buffer *out;
 647         struct dirent *dent;
 648         struct stat st;
 649         char *path, *path_file;
 650         size_t i;
 651         int hide_dotfiles = p->conf.hide_dot_files;
 652         dirls_list_t dirs, files, *list;
 653         dirls_entry_t *tmp;
 654         char sizebuf[sizeof("999.9K")];
 655         char datebuf[sizeof("2005-Jan-01 22:23:24")];
 656         size_t k;
 657         const char *content_type;
 658         long name_max;
 659 #if defined(HAVE_XATTR) || defined(HAVE_EXTATTR)
 660         char attrval[128];
 661         int attrlen;
 662 #endif
 663 #ifdef HAVE_LOCALTIME_R
 664         struct tm tm;
 665 #endif
 666
 667         if (buffer_string_is_empty(dir)) return -1;
 668
 669         i = buffer_string_length(dir);
 670
 671 #ifdef HAVE_PATHCONF
 672         if (0 >= (name_max = pathconf(dir->ptr, _PC_NAME_MAX))) {
 673                 /* some broken fs (fuse) return 0 instead of -1 */
 674 #ifdef NAME_MAX
 675                 name_max = NAME_MAX;
 676 #else
 677                 name_max = 255; /* stupid default */
 678 #endif
 679         }
 680 #elif defined __WIN32
 681         name_max = FILENAME_MAX;
 682 #else
 683         name_max = NAME_MAX;
 684 #endif
 685
 686         path = malloc(buffer_string_length(dir) + name_max + 1);
 687         force_assert(NULL != path);
 688         strcpy(path, dir->ptr);
 689         path_file = path + i;
 690
 691         if (NULL == (dp = opendir(path))) {
 692                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 693                         "opendir failed:", dir, strerror(errno));
 694
 695                 free(path);
 696                 return -1;
 697         }
 698
 699         dirs.ent   = (dirls_entry_t**) malloc(sizeof(dirls_entry_t*) * DIRLIST_BLOB_SIZE);
 700         force_assert(dirs.ent);
 701         dirs.size  = DIRLIST_BLOB_SIZE;
 702         dirs.used  = 0;
 703         files.ent  = (dirls_entry_t**) malloc(sizeof(dirls_entry_t*) * DIRLIST_BLOB_SIZE);
 704         force_assert(files.ent);
 705         files.size = DIRLIST_BLOB_SIZE;
 706         files.used = 0;
 707
 708         while ((dent = readdir(dp)) != NULL) {
 709                 unsigned short exclude_match = 0;
 710
 711                 if (dent->d_name[0] == '.') {
 712                         if (hide_dotfiles)
 713                                 continue;
 714                         if (dent->d_name[1] == '\0')
 715                                 continue;
 716                         if (dent->d_name[1] == '.' && dent->d_name[2] == '\0')
 717                                 continue;
 718                 }
 719
 720                 if (p->conf.hide_readme_file) {
 721                         if (strcmp(dent->d_name, "README.txt") == 0)
 722                                 continue;
 723                 }
 724                 if (p->conf.hide_header_file) {
 725                         if (strcmp(dent->d_name, "HEADER.txt") == 0)
 726                                 continue;
 727                 }
 728
 729                 /* compare d_name against excludes array
 730                  * elements, skipping any that match.
 731                  */
 732 #ifdef HAVE_PCRE_H
 733                 for(i = 0; i < p->conf.excludes->used; i++) {
 734                         int n;
 735 #define N 10
 736                         int ovec[N * 3];
 737                         pcre *regex = p->conf.excludes->ptr[i]->regex;
 738
 739                         if ((n = pcre_exec(regex, NULL, dent->d_name,
 740                                     strlen(dent->d_name), 0, 0, ovec, 3 * N)) < 0) {
 741                                 if (n != PCRE_ERROR_NOMATCH) {
 742                                         log_error_write(srv, __FILE__, __LINE__, "sd",
 743                                                 "execution error while matching:", n);
 744
 745                                         /* aborting would require a lot of manual cleanup here.
 746                                          * skip instead (to not leak names that break pcre matching)
 747                                          */
 748                                         exclude_match = 1;
 749                                         break;
 750                                 }
 751                         }
 752                         else {
 753                                 exclude_match = 1;
 754                                 break;
 755                         }
 756                 }
 757
 758                 if (exclude_match) {
 759                         continue;
 760                 }
 761 #endif
 762
 763                 i = strlen(dent->d_name);
 764
 765                 /* NOTE: the manual says, d_name is never more than NAME_MAX
 766                  *       so this should actually not be a buffer-overflow-risk
 767                  */
 768                 if (i > (size_t)name_max) continue;
 769
 770                 memcpy(path_file, dent->d_name, i + 1);
 771                 if (stat(path, &st) != 0)
 772                         continue;
 773
 774                 list = &files;
 775                 if (S_ISDIR(st.st_mode))
 776                         list = &dirs;
 777
 778                 if (list->used == list->size) {
 779                         list->size += DIRLIST_BLOB_SIZE;
 780                         list->ent   = (dirls_entry_t**) realloc(list->ent, sizeof(dirls_entry_t*) * list->size);
 781                         force_assert(list->ent);
 782                 }
 783
 784                 tmp = (dirls_entry_t*) malloc(sizeof(dirls_entry_t) + 1 + i);
 785                 tmp->mtime = st.st_mtime;
 786                 tmp->size  = st.st_size;
 787                 tmp->namelen = i;
 788                 memcpy(DIRLIST_ENT_NAME(tmp), dent->d_name, i + 1);
 789
 790                 list->ent[list->used++] = tmp;
 791         }
 792         closedir(dp);
 793
 794         if (dirs.used) http_dirls_sort(dirs.ent, dirs.used);
 795
 796         if (files.used) http_dirls_sort(files.ent, files.used);
 797
 798         out = buffer_init();
 799         buffer_copy_string_len(out, CONST_STR_LEN("<?xml version=\"1.0\" encoding=\""));
 800         if (buffer_string_is_empty(p->conf.encoding)) {
 801                 buffer_append_string_len(out, CONST_STR_LEN("iso-8859-1"));
 802         } else {
 803                 buffer_append_string_buffer(out, p->conf.encoding);
 804         }
 805         buffer_append_string_len(out, CONST_STR_LEN("\"?>\n"));
 806         http_list_directory_header(srv, con, p, out);
 807
 808         /* directories */
 809         for (i = 0; i < dirs.used; i++) {
 810                 tmp = dirs.ent[i];
 811
 812 #ifdef HAVE_LOCALTIME_R
 813                 localtime_r(&(tmp->mtime), &tm);
 814                 strftime(datebuf, sizeof(datebuf), "%Y-%b-%d %H:%M:%S", &tm);
 815 #else
 816                 strftime(datebuf, sizeof(datebuf), "%Y-%b-%d %H:%M:%S", localtime(&(tmp->mtime)));
 817 #endif
 818
 819                 buffer_append_string_len(out, CONST_STR_LEN("<tr class=\"d\"><td class=\"n\"><a href=\""));
 820                 buffer_append_string_encoded(out, DIRLIST_ENT_NAME(tmp), tmp->namelen, ENCODING_REL_URI_PART);
 821                 buffer_append_string_len(out, CONST_STR_LEN("/\">"));
 822                 buffer_append_string_encoded(out, DIRLIST_ENT_NAME(tmp), tmp->namelen, ENCODING_MINIMAL_XML);
 823                 buffer_append_string_len(out, CONST_STR_LEN("</a>/</td><td class=\"m\">"));
 824                 buffer_append_string_len(out, datebuf, sizeof(datebuf) - 1);
 825                 buffer_append_string_len(out, CONST_STR_LEN("</td><td class=\"s\">- &nbsp;</td><td class=\"t\">Directory</td></tr>\n"));
 826
 827                 free(tmp);
 828         }
 829
 830         /* files */
 831         for (i = 0; i < files.used; i++) {
 832                 tmp = files.ent[i];
 833
 834                 content_type = NULL;
 835 #if defined(HAVE_XATTR)
 836                 if (con->conf.use_xattr) {
 837                         memcpy(path_file, DIRLIST_ENT_NAME(tmp), tmp->namelen + 1);
 838                         attrlen = sizeof(attrval) - 1;
 839                         if (attr_get(path, srv->srvconf.xattr_name->ptr, attrval, &attrlen, 0) == 0) {
 840                                 attrval[attrlen] = '\0';
 841                                 content_type = attrval;
 842                         }
 843                 }
 844 #elif defined(HAVE_EXTATTR)
 845                 if (con->conf.use_xattr) {
 846                         memcpy(path_file, DIRLIST_ENT_NAME(tmp), tmp->namelen + 1);
 847                         if(-1 != (attrlen = extattr_get_file(path, EXTATTR_NAMESPACE_USER, srv->srvconf.xattr_name->ptr, attrval, sizeof(attrval)-1))) {
 848                                 attrval[attrlen] = '\0';
 849                                 content_type = attrval;
 850                         }
 851                 }
 852 #endif
 853
 854                 if (content_type == NULL) {
 855                         content_type = "application/octet-stream";
 856                         for (k = 0; k < con->conf.mimetypes->used; k++) {
 857                                 data_string *ds = (data_string *)con->conf.mimetypes->data[k];
 858                                 size_t ct_len;
 859
 860                                 if (buffer_is_empty(ds->key))
 861                                         continue;
 862
 863                                 ct_len = buffer_string_length(ds->key);
 864                                 if (tmp->namelen < ct_len)
 865                                         continue;
 866
 867                                 if (0 == strncasecmp(DIRLIST_ENT_NAME(tmp) + tmp->namelen - ct_len, ds->key->ptr, ct_len)) {
 868                                         content_type = ds->value->ptr;
 869                                         break;
 870                                 }
 871                         }
 872                 }
 873
 874 #ifdef HAVE_LOCALTIME_R
 875                 localtime_r(&(tmp->mtime), &tm);
 876                 strftime(datebuf, sizeof(datebuf), "%Y-%b-%d %H:%M:%S", &tm);
 877 #else
 878                 strftime(datebuf, sizeof(datebuf), "%Y-%b-%d %H:%M:%S", localtime(&(tmp->mtime)));
 879 #endif
 880                 http_list_directory_sizefmt(sizebuf, sizeof(sizebuf), tmp->size);
 881
 882                 buffer_append_string_len(out, CONST_STR_LEN("<tr><td class=\"n\"><a href=\""));
 883                 buffer_append_string_encoded(out, DIRLIST_ENT_NAME(tmp), tmp->namelen, ENCODING_REL_URI_PART);
 884                 buffer_append_string_len(out, CONST_STR_LEN("\">"));
 885                 buffer_append_string_encoded(out, DIRLIST_ENT_NAME(tmp), tmp->namelen, ENCODING_MINIMAL_XML);
 886                 buffer_append_string_len(out, CONST_STR_LEN("</a></td><td class=\"m\">"));
 887                 buffer_append_string_len(out, datebuf, sizeof(datebuf) - 1);
 888                 buffer_append_string_len(out, CONST_STR_LEN("</td><td class=\"s\">"));
 889                 buffer_append_string(out, sizebuf);
 890                 buffer_append_string_len(out, CONST_STR_LEN("</td><td class=\"t\">"));
 891                 buffer_append_string(out, content_type);
 892                 buffer_append_string_len(out, CONST_STR_LEN("</td></tr>\n"));
 893
 894                 free(tmp);
 895         }
 896
 897         free(files.ent);
 898         free(dirs.ent);
 899         free(path);
 900
 901         http_list_directory_footer(srv, con, p, out);
 902
 903         /* Insert possible charset to Content-Type */
 904         if (buffer_string_is_empty(p->conf.encoding)) {
 905                 response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_STR_LEN("text/html"));
 906         } else {
 907                 buffer_copy_string_len(p->content_charset, CONST_STR_LEN("text/html; charset="));
 908                 buffer_append_string_buffer(p->content_charset, p->conf.encoding);
 909                 response_header_overwrite(srv, con, CONST_STR_LEN("Content-Type"), CONST_BUF_LEN(p->content_charset));
 910         }
 911
 912         con->file_finished = 1;
 913         chunkqueue_append_buffer(con->write_queue, out);
 914         buffer_free(out);
 915
 916         return 0;
 917 }
 918
 919
 920
 921 URIHANDLER_FUNC(mod_dirlisting_subrequest) {
 922         plugin_data *p = p_d;
 923         stat_cache_entry *sce = NULL;
 924
 925         UNUSED(srv);
 926
 927         /* we only handle GET, POST and HEAD */
 928         switch(con->request.http_method) {
 929         case HTTP_METHOD_GET:
 930         case HTTP_METHOD_POST:
 931         case HTTP_METHOD_HEAD:
 932                 break;
 933         default:
 934                 return HANDLER_GO_ON;
 935         }
 936
 937         if (con->mode != DIRECT) return HANDLER_GO_ON;
 938
 939         if (buffer_is_empty(con->physical.path)) return HANDLER_GO_ON;
 940         if (buffer_is_empty(con->uri.path)) return HANDLER_GO_ON;
 941         if (con->uri.path->ptr[buffer_string_length(con->uri.path) - 1] != '/') return HANDLER_GO_ON;
 942
 943         mod_dirlisting_patch_connection(srv, con, p);
 944
 945         if (!p->conf.dir_listing) return HANDLER_GO_ON;
 946
 947         if (con->conf.log_request_handling) {
 948                 log_error_write(srv, __FILE__, __LINE__,  "s",  "-- handling the request as Dir-Listing");
 949                 log_error_write(srv, __FILE__, __LINE__,  "sb", "URI          :", con->uri.path);
 950         }
 951
 952         if (HANDLER_ERROR == stat_cache_get_entry(srv, con, con->physical.path, &sce)) {
 953                 log_error_write(srv, __FILE__, __LINE__,  "SB", "stat_cache_get_entry failed: ", con->physical.path);
 954                 SEGFAULT();
 955         }
 956
 957         if (!S_ISDIR(sce->st.st_mode)) return HANDLER_GO_ON;
 958
 959         if (http_list_directory(srv, con, p, con->physical.path)) {
 960                 /* dirlisting failed */
 961                 con->http_status = 403;
 962         }
 963
 964         buffer_reset(con->physical.path);
 965
 966         /* not found */
 967         return HANDLER_FINISHED;
 968 }
 969
 970 /* this function is called at dlopen() time and inits the callbacks */
 971
 972 int mod_dirlisting_plugin_init(plugin *p);
 973 int mod_dirlisting_plugin_init(plugin *p) {
 974         p->version     = LIGHTTPD_VERSION_ID;
 975         p->name        = buffer_init_string("dirlisting");
 976
 977         p->init        = mod_dirlisting_init;
 978         p->handle_subrequest_start  = mod_dirlisting_subrequest;
 979         p->set_defaults  = mod_dirlisting_set_defaults;
 980         p->cleanup     = mod_dirlisting_free;
 981
 982         p->data        = NULL;
 983
 984         return 0;
 985 }