git.m6w6.name Git - m6w6/ext-http/blob - http_send_api.c

   1 /*
   2     +--------------------------------------------------------------------+
   3     | PECL :: http                                                       |
   4     +--------------------------------------------------------------------+
   5     | Redistribution and use in source and binary forms, with or without |
   6     | modification, are permitted provided that the conditions mentioned |
   7     | in the accompanying LICENSE file are met.                          |
   8     +--------------------------------------------------------------------+
   9     | Copyright (c) 2004-2006, Michael Wallner <mike@php.net>            |
  10     +--------------------------------------------------------------------+
  11 */
  12
  13 /* $Id$ */
  14
  15 #define HTTP_WANT_SAPI
  16 #define HTTP_WANT_ZLIB
  17 #define HTTP_WANT_MAGIC
  18 #include "php_http.h"
  19
  20 #include "php_streams.h"
  21 #include "ext/standard/php_lcg.h"
  22
  23 #include "php_http_api.h"
  24 #include "php_http_cache_api.h"
  25 #include "php_http_date_api.h"
  26 #include "php_http_encoding_api.h"
  27 #include "php_http_headers_api.h"
  28 #include "php_http_send_api.h"
  29
  30 #define http_flush(d, l) _http_flush(NULL, (d), (l) TSRMLS_CC)
  31 /* {{{ static inline void http_flush() */
  32 static inline void _http_flush(void *nothing, const char *data, size_t data_len TSRMLS_DC)
  33 {
  34         PHPWRITE(data, data_len);
  35         php_end_ob_buffer(1, 1 TSRMLS_CC);
  36         sapi_flush(TSRMLS_C);
  37
  38 #define HTTP_MSEC(s) (s * 1000)
  39 #define HTTP_USEC(s) (HTTP_MSEC(s) * 1000)
  40 #define HTTP_NSEC(s) (HTTP_USEC(s) * 1000)
  41 #define HTTP_NANOSEC (1000 * 1000 * 1000)
  42 #define HTTP_DIFFSEC (0.001)
  43
  44         if (HTTP_G->send.throttle_delay >= HTTP_DIFFSEC) {
  45 #if defined(PHP_WIN32)
  46                 Sleep((DWORD) HTTP_MSEC(HTTP_G->send.throttle_delay));
  47 #elif defined(HAVE_USLEEP)
  48                 usleep(HTTP_USEC(HTTP_G->send.throttle_delay));
  49 #elif defined(HAVE_NANOSLEEP)
  50                 struct timespec req, rem;
  51
  52                 req.tv_sec = (time_t) HTTP_G->send.throttle_delay;
  53                 req.tv_nsec = HTTP_NSEC(HTTP_G->send.throttle_delay) % HTTP_NANOSEC;
  54
  55                 while (nanosleep(&req, &rem) && (errno == EINTR) && (HTTP_NSEC(rem.tv_sec) + rem.tv_nsec) > HTTP_NSEC(HTTP_DIFFSEC))) {
  56                         req.tv_sec = rem.tv_sec;
  57                         req.tv_nsec = rem.tv_nsec;
  58                 }
  59 #endif
  60         }
  61 }
  62 /* }}} */
  63
  64 /* {{{ http_send_response_start */
  65 #define http_send_response_start(b, cl) _http_send_response_start((b), (cl) TSRMLS_CC)
  66 static inline void _http_send_response_start(void **buffer, size_t content_length TSRMLS_DC)
  67 {
  68         int encoding;
  69
  70         if ((encoding = http_encoding_response_start(content_length))) {
  71 #ifdef HTTP_HAVE_ZLIB
  72                 *buffer = http_encoding_deflate_stream_init(NULL,
  73                         (encoding == HTTP_ENCODING_GZIP) ?
  74                                 HTTP_DEFLATE_TYPE_GZIP : HTTP_DEFLATE_TYPE_ZLIB);
  75 #endif
  76         }
  77 }
  78 /* }}} */
  79
  80 /* {{{ http_send_response_data_plain */
  81 #define http_send_response_data_plain(b, d, dl) _http_send_response_data_plain((b), (d), (dl) TSRMLS_CC)
  82 static inline void _http_send_response_data_plain(void **buffer, const char *data, size_t data_len TSRMLS_DC)
  83 {
  84         if (HTTP_G->send.deflate.encoding) {
  85 #ifdef HTTP_HAVE_ZLIB
  86                 char *encoded;
  87                 size_t encoded_len;
  88                 http_encoding_stream *s = *((http_encoding_stream **) buffer);
  89
  90                 http_encoding_deflate_stream_update(s, data, data_len, &encoded, &encoded_len);
  91                 if (HTTP_G->send.buffer_size) {
  92                         phpstr_chunked_output((phpstr **) &s->storage, encoded, encoded_len, HTTP_G->send.buffer_size, _http_flush, NULL TSRMLS_CC);
  93                 } else {
  94                         http_flush(encoded, encoded_len);
  95                 }
  96                 efree(encoded);
  97 #else
  98                 http_error(HE_ERROR, HTTP_E_RESPONSE, "Attempt to send GZIP response despite being able to do so; please report this bug");
  99 #endif
 100         } else if (HTTP_G->send.buffer_size) {
 101                 phpstr_chunked_output((phpstr **) buffer, data, data_len, HTTP_G->send.buffer_size, _http_flush, NULL TSRMLS_CC);
 102         } else {
 103                 http_flush(data, data_len);
 104         }
 105 }
 106 /* }}} */
 107
 108 /* {{{ http_send_response_data_fetch */
 109 #define http_send_response_data_fetch(b, d, l, m, s, e) _http_send_response_data_fetch((b), (d), (l), (m), (s), (e) TSRMLS_CC)
 110 static inline void _http_send_response_data_fetch(void **buffer, const void *data, size_t data_len, http_send_mode mode, size_t begin, size_t end TSRMLS_DC)
 111 {
 112         char *buf;
 113         long got, len = end - begin;
 114
 115         switch (mode) {
 116                 case SEND_RSRC:
 117                 {
 118                         php_stream *s = (php_stream *) data;
 119
 120                         if (SUCCESS == php_stream_seek(s, begin, SEEK_SET)) {
 121                                 buf = emalloc(HTTP_SENDBUF_SIZE);
 122
 123                                 while (len > 0) {
 124                                         got = php_stream_read(s, buf, MIN(len, HTTP_SENDBUF_SIZE));
 125                                         http_send_response_data_plain(buffer, buf, got);
 126                                         len -= got;
 127                                 }
 128
 129                                 efree(buf);
 130                         }
 131                         break;
 132                 }
 133
 134                 case SEND_DATA:
 135                 {
 136                         buf = (char *) data + begin;
 137
 138                         while (len > 0) {
 139                                 got = MIN(len, HTTP_SENDBUF_SIZE);
 140                                 http_send_response_data_plain(buffer, buf, got);
 141                                 len -= got;
 142                                 buf += got;
 143                         }
 144                         break;
 145                 }
 146
 147                 EMPTY_SWITCH_DEFAULT_CASE();
 148         }
 149 }
 150 /* }}} */
 151
 152 /* {{{ http_send_response_finish */
 153 #define http_send_response_finish(b) _http_send_response_finish((b) TSRMLS_CC)
 154 static inline void _http_send_response_finish(void **buffer TSRMLS_DC)
 155 {
 156         if (HTTP_G->send.deflate.encoding) {
 157 #ifdef HTTP_HAVE_ZLIB
 158                 char *encoded = NULL;
 159                 size_t encoded_len = 0;
 160                 http_encoding_stream *s = *((http_encoding_stream **) buffer);
 161
 162                 http_encoding_deflate_stream_finish(s, &encoded, &encoded_len);
 163                 if (HTTP_G->send.buffer_size) {
 164                         phpstr_chunked_output((phpstr **) &s->storage, encoded, encoded_len, 0, _http_flush, NULL TSRMLS_CC);
 165                 } else {
 166                         http_flush(encoded, encoded_len);
 167                 }
 168                 http_encoding_deflate_stream_free(&s);
 169                 STR_FREE(encoded);
 170 #else
 171                 http_error(HE_ERROR, HTTP_E_RESPONSE, "Attempt to send GZIP response despite being able to do so; please report this bug");
 172 #endif
 173         } else if (HTTP_G->send.buffer_size) {
 174                 phpstr_chunked_output((phpstr **) buffer, NULL, 0, 0, _http_flush, NULL TSRMLS_CC);
 175         }
 176 }
 177 /* }}} */
 178
 179 /* {{{ */
 180 PHP_MINIT_FUNCTION(http_send)
 181 {
 182         HTTP_LONG_CONSTANT("HTTP_REDIRECT", HTTP_REDIRECT);
 183         HTTP_LONG_CONSTANT("HTTP_REDIRECT_PERM", HTTP_REDIRECT_PERM);
 184         HTTP_LONG_CONSTANT("HTTP_REDIRECT_FOUND", HTTP_REDIRECT_FOUND);
 185         HTTP_LONG_CONSTANT("HTTP_REDIRECT_POST", HTTP_REDIRECT_POST);
 186         HTTP_LONG_CONSTANT("HTTP_REDIRECT_PROXY", HTTP_REDIRECT_PROXY);
 187         HTTP_LONG_CONSTANT("HTTP_REDIRECT_TEMP", HTTP_REDIRECT_TEMP);
 188
 189         return SUCCESS;
 190 }
 191 /* }}} */
 192
 193
 194 /* {{{ STATUS http_send_header(char *, char *, zend_bool) */
 195 PHP_HTTP_API STATUS _http_send_header_ex(const char *name, size_t name_len, const char *value, size_t value_len, zend_bool replace, char **sent_header TSRMLS_DC)
 196 {
 197         STATUS ret;
 198         size_t header_len = sizeof(": ") + name_len + value_len + 1;
 199         char *header = emalloc(header_len + 1);
 200
 201         header[header_len] = '\0';
 202         header_len = snprintf(header, header_len, "%s: %s", name, value);
 203         ret = http_send_header_string_ex(header, header_len, replace);
 204         if (sent_header) {
 205                 *sent_header = header;
 206         } else {
 207                 efree(header);
 208         }
 209         return ret;
 210 }
 211 /* }}} */
 212
 213 /* {{{ STATUS http_send_status_header(int, char *) */
 214 PHP_HTTP_API STATUS _http_send_status_header_ex(int status, const char *header, size_t header_len, zend_bool replace TSRMLS_DC)
 215 {
 216         STATUS ret;
 217         sapi_header_line h = {(char *) header, header_len, status};
 218         if (SUCCESS != (ret = sapi_header_op(replace ? SAPI_HEADER_REPLACE : SAPI_HEADER_ADD, &h TSRMLS_CC))) {
 219                 http_error_ex(HE_WARNING, HTTP_E_HEADER, "Could not send header: %s (%d)", header, status);
 220         }
 221         return ret;
 222 }
 223 /* }}} */
 224
 225 /* {{{ STATUS http_send_last_modified(int) */
 226 PHP_HTTP_API STATUS _http_send_last_modified_ex(time_t t, char **sent_header TSRMLS_DC)
 227 {
 228         STATUS ret;
 229         char *date = http_date(t);
 230
 231         if (!date) {
 232                 return FAILURE;
 233         }
 234
 235         ret = http_send_header_ex("Last-Modified", lenof("Last-Modified"), date, strlen(date), 1, sent_header);
 236         efree(date);
 237
 238         /* remember */
 239         HTTP_G->send.last_modified = t;
 240
 241         return ret;
 242 }
 243 /* }}} */
 244
 245 /* {{{ STATUS http_send_etag(char *, size_t) */
 246 PHP_HTTP_API STATUS _http_send_etag_ex(const char *etag, size_t etag_len, char **sent_header TSRMLS_DC)
 247 {
 248         STATUS status;
 249         char *etag_header;
 250         size_t etag_header_len;
 251
 252         if (!etag_len){
 253                 http_error_ex(HE_WARNING, HTTP_E_HEADER, "Attempt to send empty ETag (previous: %s)\n", HTTP_G->send.unquoted_etag);
 254                 return FAILURE;
 255         }
 256
 257         etag_header_len = spprintf(&etag_header, 0, "ETag: \"%s\"", etag);
 258         status = http_send_header_string_ex(etag_header, etag_header_len, 1);
 259
 260         /* remember */
 261         STR_SET(HTTP_G->send.unquoted_etag, estrndup(etag, etag_len));
 262
 263         if (sent_header) {
 264                 *sent_header = etag_header;
 265         } else {
 266                 efree(etag_header);
 267         }
 268
 269         return status;
 270 }
 271 /* }}} */
 272
 273 /* {{{ STATUS http_send_content_type(char *, size_t) */
 274 PHP_HTTP_API STATUS _http_send_content_type(const char *content_type, size_t ct_len TSRMLS_DC)
 275 {
 276         HTTP_CHECK_CONTENT_TYPE(content_type, return FAILURE);
 277
 278         /* remember for multiple ranges */
 279         STR_FREE(HTTP_G->send.content_type);
 280         HTTP_G->send.content_type = estrndup(content_type, ct_len);
 281
 282         return http_send_header_ex("Content-Type", lenof("Content-Type"), content_type, ct_len, 1, NULL);
 283 }
 284 /* }}} */
 285
 286 /* {{{ STATUS http_send_content_disposition(char *, size_t, zend_bool) */
 287 PHP_HTTP_API STATUS _http_send_content_disposition(const char *filename, size_t f_len, zend_bool send_inline TSRMLS_DC)
 288 {
 289         STATUS status;
 290         char *cd_header;
 291
 292         if (send_inline) {
 293                 cd_header = ecalloc(1, sizeof("Content-Disposition: inline; filename=\"\"") + f_len);
 294                 sprintf(cd_header, "Content-Disposition: inline; filename=\"%s\"", filename);
 295         } else {
 296                 cd_header = ecalloc(1, sizeof("Content-Disposition: attachment; filename=\"\"") + f_len);
 297                 sprintf(cd_header, "Content-Disposition: attachment; filename=\"%s\"", filename);
 298         }
 299
 300         status = http_send_header_string(cd_header);
 301         efree(cd_header);
 302         return status;
 303 }
 304 /* }}} */
 305
 306 /* {{{ STATUS http_send(void *, size_t, http_send_mode) */
 307 PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_send_mode data_mode, zend_bool no_cache TSRMLS_DC)
 308 {
 309         void *s = NULL;
 310         HashTable ranges;
 311         http_range_status range_status;
 312
 313         if (!data_ptr) {
 314                 return FAILURE;
 315         }
 316         if (!data_size) {
 317                 return SUCCESS;
 318         }
 319
 320         /* enable partial dl and resume */
 321         http_send_header_string("Accept-Ranges: bytes");
 322
 323         zend_hash_init(&ranges, 0, NULL, ZVAL_PTR_DTOR, 0);
 324         range_status = http_get_request_ranges(&ranges, data_size);
 325
 326         switch (range_status) {
 327                 case RANGE_ERR:
 328                 {
 329                         zend_hash_destroy(&ranges);
 330                         http_send_status(416);
 331                         return FAILURE;
 332                 }
 333                 case RANGE_OK:
 334                 {
 335                         /* Range Request - only send ranges if entity hasn't changed */
 336                         if (    http_got_server_var("HTTP_IF_RANGE") &&
 337                                         !http_match_etag("HTTP_IF_RANGE", HTTP_G->send.unquoted_etag) &&
 338                                         !http_match_last_modified("HTTP_IF_RANGE", HTTP_G->send.last_modified)) {
 339                                 /* fallthrough to send full entity with 200 Ok */
 340                                 no_cache = 1;
 341                         } else if (     !http_match_etag_ex("HTTP_IF_MATCH", HTTP_G->send.unquoted_etag, 0) ||
 342                                                 !http_match_last_modified_ex("HTTP_IF_UNMODIFIED_SINCE", HTTP_G->send.last_modified, 0) ||
 343                                                 !http_match_last_modified_ex("HTTP_UNLESS_MODIFIED_SINCE", HTTP_G->send.last_modified, 0)) {
 344                                 /* 412 Precondition failed */
 345                                 zend_hash_destroy(&ranges);
 346                                 http_send_status(412);
 347                                 return FAILURE;
 348                         } else if (zend_hash_num_elements(&ranges) == 1) {
 349                                 /* single range */
 350                                 zval **range, **begin, **end;
 351
 352                                 if (    SUCCESS != zend_hash_index_find(&ranges, 0, (void *) &range) ||
 353                                                 SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(range), 0, (void *) &begin) ||
 354                                                 SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(range), 1, (void *) &end)) {
 355                                         /* this should never happen */
 356                                         zend_hash_destroy(&ranges);
 357                                         http_send_status(500);
 358                                         return FAILURE;
 359                                 } else {
 360                                         char range_header_str[256];
 361                                         size_t range_header_len;
 362
 363                                         range_header_len = snprintf(range_header_str, lenof(range_header_str), "Content-Range: bytes %ld-%ld/%zu", Z_LVAL_PP(begin), Z_LVAL_PP(end), data_size);
 364                                         http_send_status_header_ex(206, range_header_str, range_header_len, 1);
 365                                         http_send_response_start(&s, Z_LVAL_PP(end)-Z_LVAL_PP(begin)+1);
 366                                         http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, Z_LVAL_PP(begin), Z_LVAL_PP(end) + 1);
 367                                         http_send_response_finish(&s);
 368                                         zend_hash_destroy(&ranges);
 369                                         return SUCCESS;
 370                                 }
 371                         } else {
 372                                 /* multi range */
 373                                 HashPosition pos;
 374                                 zval **range, **begin, **end;
 375                                 const char *content_type = HTTP_G->send.content_type;
 376                                 char boundary_str[32], range_header_str[256];
 377                                 size_t boundary_len, range_header_len;
 378
 379                                 boundary_len = snprintf(boundary_str, lenof(boundary_str), "%lu%0.9f", (ulong) HTTP_G->request.time, (float) php_combined_lcg(TSRMLS_C));
 380                                 range_header_len = snprintf(range_header_str, lenof(range_header_str), "Content-Type: multipart/byteranges; boundary=%s", boundary_str);
 381
 382                                 http_send_status_header_ex(206, range_header_str, range_header_len, 1);
 383                                 http_send_response_start(&s, 0);
 384
 385                                 if (!content_type) {
 386                                         content_type = "application/x-octetstream";
 387                                 }
 388
 389                                 FOREACH_HASH_VAL(pos, &ranges, range) {
 390                                         if (    SUCCESS == zend_hash_index_find(Z_ARRVAL_PP(range), 0, (void *) &begin) &&
 391                                                         SUCCESS == zend_hash_index_find(Z_ARRVAL_PP(range), 1, (void *) &end)) {
 392                                                 char preface_str[512];
 393                                                 size_t preface_len;
 394
 395 #define HTTP_RANGE_PREFACE \
 396         HTTP_CRLF "--%s" \
 397         HTTP_CRLF "Content-Type: %s" \
 398         HTTP_CRLF "Content-Range: bytes %ld-%ld/%zu" \
 399         HTTP_CRLF HTTP_CRLF
 400
 401                                                 preface_len = snprintf(preface_str, lenof(preface_str), HTTP_RANGE_PREFACE, boundary_str, content_type, Z_LVAL_PP(begin), Z_LVAL_PP(end), data_size);
 402                                                 http_send_response_data_plain(&s, preface_str, preface_len);
 403                                                 http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, Z_LVAL_PP(begin), Z_LVAL_PP(end) + 1);
 404                                         }
 405                                 }
 406
 407                                 http_send_response_data_plain(&s, HTTP_CRLF "--", lenof(HTTP_CRLF "--"));
 408                                 http_send_response_data_plain(&s, boundary_str, boundary_len);
 409                                 http_send_response_data_plain(&s, "--", lenof("--"));
 410
 411                                 http_send_response_finish(&s);
 412                                 zend_hash_destroy(&ranges);
 413                                 return SUCCESS;
 414                         }
 415                 }
 416                 case RANGE_NO:
 417                 {
 418                         zend_hash_destroy(&ranges);
 419
 420                         /* send 304 Not Modified if etag matches - DON'T return on ETag generation failure */
 421                         if (!no_cache && (http_interrupt_ob_etaghandler() || (HTTP_G->send.unquoted_etag != NULL))) {
 422                                 char *etag = NULL;
 423
 424                                 if (HTTP_G->send.unquoted_etag) {
 425                                         etag = estrdup(HTTP_G->send.unquoted_etag);
 426                                 }
 427
 428                                 if (etag || (etag = http_etag(data_ptr, data_size, data_mode))) {
 429                                         char *sent_header = NULL;
 430
 431                                         http_send_etag_ex(etag, strlen(etag), &sent_header);
 432                                         if (http_match_etag("HTTP_IF_NONE_MATCH", etag)) {
 433                                                 return http_exit_ex(304, sent_header, NULL, 0);
 434                                         } else {
 435                                                 STR_FREE(sent_header);
 436                                                 /* no caching for Last-Modified if ETags really don't match */
 437                                                 no_cache = http_got_server_var("HTTP_IF_NONE_MATCH");
 438                                         }
 439                                         efree(etag);
 440                                 }
 441                         }
 442
 443                         /* send 304 Not Modified if last modified matches */
 444                         if (!no_cache && http_match_last_modified("HTTP_IF_MODIFIED_SINCE", HTTP_G->send.last_modified)) {
 445                                 char *sent_header = NULL;
 446                                 http_send_last_modified_ex(HTTP_G->send.last_modified, &sent_header);
 447                                 return http_exit_ex(304, sent_header, NULL, 0);
 448                         }
 449
 450                         /* send full response */
 451                         http_send_response_start(&s, data_size);
 452                         http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, 0, data_size);
 453                         http_send_response_finish(&s);
 454                         return SUCCESS;
 455                 }
 456         }
 457         return FAILURE;
 458 }
 459 /* }}} */
 460
 461 /* {{{ STATUS http_send_stream(php_stream *) */
 462 PHP_HTTP_API STATUS _http_send_stream_ex(php_stream *file, zend_bool close_stream, zend_bool no_cache TSRMLS_DC)
 463 {
 464         STATUS status;
 465         php_stream_statbuf ssb;
 466
 467         if ((!file) || php_stream_stat(file, &ssb)) {
 468                 char *defct = sapi_get_default_content_type(TSRMLS_C);
 469
 470                 http_send_content_type(defct, strlen(defct));
 471                 http_send_header_string("Content-Disposition:");
 472                 http_error(HE_WARNING, HTTP_E_RESPONSE, "File not found; stat failed");
 473                 STR_FREE(defct);
 474
 475                 if (HTTP_G->send.not_found_404) {
 476                         http_exit_ex(404, NULL, estrdup("File not found\n"), 0);
 477                 }
 478                 return FAILURE;
 479         }
 480
 481         status = http_send_ex(file, ssb.sb.st_size, SEND_RSRC, no_cache);
 482
 483         if (close_stream) {
 484                 php_stream_close(file);
 485         }
 486
 487         return status;
 488 }
 489 /* }}} */
 490
 491 /* {{{ char *http_guess_content_type(char *magic_file, long magic_mode, void *data, size_t size, http_send_mode mode) */
 492 PHP_HTTP_API char *_http_guess_content_type(const char *magicfile, long magicmode, void *data_ptr, size_t data_len, http_send_mode data_mode TSRMLS_DC)
 493 {
 494         char *ct = NULL;
 495
 496 #ifdef HTTP_HAVE_MAGIC
 497         struct magic_set *magic = NULL;
 498
 499         HTTP_CHECK_OPEN_BASEDIR(magicfile, return NULL);
 500
 501         if (!data_ptr) {
 502                 http_error(HE_WARNING, HTTP_E_INVALID_PARAM, "Supplied payload is empty");
 503         } else if (!(magic = magic_open(magicmode &~ MAGIC_MIME))) {
 504                 http_error_ex(HE_WARNING, HTTP_E_INVALID_PARAM, "Invalid magic mode: %ld", magicmode);
 505         } else if (-1 == magic_load(magic, magicfile)) {
 506                 http_error_ex(HE_WARNING, HTTP_E_RUNTIME, "Failed to load magic database '%s' (%s)", magicfile, magic_error(magic));
 507         } else {
 508                 const char *ctype = NULL;
 509
 510                 magic_setflags(magic, magicmode);
 511
 512                 switch (data_mode) {
 513                         case SEND_RSRC:
 514                         {
 515                                 char *buffer;
 516                                 size_t b_len;
 517
 518                                 b_len = php_stream_copy_to_mem(data_ptr, &buffer, 65536, 0);
 519                                 ctype = magic_buffer(magic, buffer, b_len);
 520                                 efree(buffer);
 521                                 break;
 522                         }
 523
 524                         case SEND_DATA:
 525                                 ctype = magic_buffer(magic, data_ptr, data_len);
 526                                 break;
 527
 528                         default:
 529                                 HTTP_CHECK_OPEN_BASEDIR(data_ptr, magic_close(magic); return NULL);
 530                                 ctype = magic_file(magic, data_ptr);
 531                                 break;
 532                 }
 533
 534                 if (ctype) {
 535                         ct = estrdup(ctype);
 536                 } else {
 537                         http_error_ex(HE_WARNING, HTTP_E_RUNTIME, "Failed to guess Content-Type: %s", magic_error(magic));
 538                 }
 539         }
 540         if (magic) {
 541                 magic_close(magic);
 542         }
 543 #else
 544         http_error(HE_WARNING, HTTP_E_RUNTIME, "Cannot guess Content-Type; libmagic not available");
 545 #endif
 546
 547         return ct;
 548 }
 549 /* }}} */
 550
 551 /*
 552  * Local variables:
 553  * tab-width: 4
 554  * c-basic-offset: 4
 555  * End:
 556  * vim600: sw=4 ts=4 fdm=marker
 557  * vim<600: sw=4 ts=4
 558  */
 559