git.m6w6.name Git - m6w6/ext-http/blob - http_encoding_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) 2004-2005, Michael Wallner <mike@php.net>            |
  10     +--------------------------------------------------------------------+
  11 */
  12
  13 /* $Id$ */
  14
  15 #ifdef HAVE_CONFIG_H
  16 #       include "config.h"
  17 #endif
  18 #include "php_http.h"
  19
  20 #include "php_http_api.h"
  21 #include "php_http_encoding_api.h"
  22 #include "php_http_send_api.h"
  23 #include "php_http_headers_api.h"
  24
  25 ZEND_EXTERN_MODULE_GLOBALS(http);
  26
  27 static inline int eol_match(char **line, int *eol_len)
  28 {
  29         char *ptr = *line;
  30
  31         while (0x20 == *ptr) ++ptr;
  32
  33         if (ptr == http_locate_eol(*line, eol_len)) {
  34                 *line = ptr;
  35                 return 1;
  36         } else {
  37                 return 0;
  38         }
  39 }
  40
  41 /* {{{ char *http_encoding_dechunk(char *, size_t, char **, size_t *) */
  42 PHP_HTTP_API const char *_http_encoding_dechunk(const char *encoded, size_t encoded_len, char **decoded, size_t *decoded_len TSRMLS_DC)
  43 {
  44         int eol_len = 0;
  45         char *n_ptr = NULL;
  46         const char *e_ptr = encoded;
  47
  48         *decoded_len = 0;
  49         *decoded = ecalloc(1, encoded_len);
  50
  51         while ((encoded + encoded_len - e_ptr) > 0) {
  52                 ulong chunk_len = 0, rest;
  53
  54                 chunk_len = strtoul(e_ptr, &n_ptr, 16);
  55
  56                 /* we could not read in chunk size */
  57                 if (n_ptr == e_ptr) {
  58                         /*
  59                          * if this is the first turn and there doesn't seem to be a chunk
  60                          * size at the begining of the body, do not fail on apparently
  61                          * not encoded data and return a copy
  62                          */
  63                         if (e_ptr == encoded) {
  64                                 http_error(HE_NOTICE, HTTP_E_ENCODING, "Data does not seem to be chunked encoded");
  65                                 memcpy(*decoded, encoded, encoded_len);
  66                                 *decoded_len = encoded_len;
  67                                 return encoded + encoded_len;
  68                         } else {
  69                                 efree(*decoded);
  70                                 http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Expected chunk size at pos %tu of %zu but got trash", n_ptr - encoded, encoded_len);
  71                                 return NULL;
  72                         }
  73                 }
  74
  75                 /* reached the end */
  76                 if (!chunk_len) {
  77                         /* move over '0' chunked encoding terminator */
  78                         while (*e_ptr == '0') ++e_ptr;
  79                         break;
  80                 }
  81
  82                 /* there should be CRLF after the chunk size, but we'll ignore SP+ too */
  83                 if (*n_ptr && !eol_match(&n_ptr, &eol_len)) {
  84                         if (eol_len == 2) {
  85                                 http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Expected CRLF at pos %tu of %zu but got 0x%02X 0x%02X", n_ptr - encoded, encoded_len, *n_ptr, *(n_ptr + 1));
  86                         } else {
  87                                 http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Expected LF at pos %tu of %zu but got 0x%02X", n_ptr - encoded, encoded_len, *n_ptr);
  88                         }
  89                 }
  90                 n_ptr += eol_len;
  91
  92                 /* chunk size pretends more data than we actually got, so it's probably a truncated message */
  93                 if (chunk_len > (rest = encoded + encoded_len - n_ptr)) {
  94                         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Truncated message: chunk size %lu exceeds remaining data size %lu at pos %tu of %zu", chunk_len, rest, n_ptr - encoded, encoded_len);
  95                         chunk_len = rest;
  96                 }
  97
  98                 /* copy the chunk */
  99                 memcpy(*decoded + *decoded_len, n_ptr, chunk_len);
 100                 *decoded_len += chunk_len;
 101
 102                 if (chunk_len == rest) {
 103                         e_ptr = n_ptr + chunk_len;
 104                         break;
 105                 } else {
 106                         /* advance to next chunk */
 107                         e_ptr = n_ptr + chunk_len + eol_len;
 108                 }
 109         }
 110
 111         return e_ptr;
 112 }
 113 /* }}} */
 114
 115 #ifdef HTTP_HAVE_ZLIB
 116
 117 static const char http_encoding_gzip_header[] = {
 118         (const char) 0x1f,                      // fixed value
 119         (const char) 0x8b,                      // fixed value
 120         (const char) Z_DEFLATED,        // compression algorithm
 121         (const char) 0,                         // none of the possible flags defined by the GZIP "RFC"
 122         (const char) 0,                         // MTIME
 123         (const char) 0,                         // =*=
 124         (const char) 0,                         // =*=
 125         (const char) 0,                         // =*=
 126         (const char) 0,                         // two possible flag values for 9 compression levels? o_O
 127 #ifdef PHP_WIN32
 128         (const char) 0x0b                       // OS_CODE
 129 #else
 130         (const char) 0x03                       // OS_CODE
 131 #endif
 132 };
 133
 134 PHP_HTTP_API STATUS _http_encoding_gzencode(int level, int mtime, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
 135 {
 136         z_stream Z;
 137         STATUS status = Z_OK;
 138
 139         if (!(data && data_len)) {
 140                 return FAILURE;
 141         }
 142
 143         Z.zalloc = Z_NULL;
 144         Z.zfree  = Z_NULL;
 145         Z.opaque = Z_NULL;
 146         Z.next_in   = (Bytef *) data;
 147         Z.avail_in  = data_len;
 148         Z.avail_out = HTTP_ENCODING_BUFLEN(data_len) + HTTP_ENCODING_SAFPAD - 1;
 149
 150         *encoded = emalloc(HTTP_ENCODING_BUFLEN(data_len) + sizeof(http_encoding_gzip_header) + HTTP_ENCODING_SAFPAD);
 151         memcpy(*encoded, http_encoding_gzip_header, sizeof(http_encoding_gzip_header));
 152
 153         if (mtime) {
 154                 (*encoded)[4] = (char) (mtime & 0xFF);
 155                 (*encoded)[5] = (char) ((mtime >> 8) & 0xFF);
 156                 (*encoded)[6] = (char) ((mtime >> 16) & 0xFF);
 157                 (*encoded)[7] = (char) ((mtime >> 24) & 0xFF);
 158         }
 159
 160         Z.next_out = (Bytef *) *encoded + sizeof(http_encoding_gzip_header);
 161
 162         if (Z_OK == (status = deflateInit2(&Z, level, Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) {
 163                 status = deflate(&Z, Z_FINISH);
 164                 deflateEnd(&Z);
 165
 166                 if (Z_STREAM_END == status) {
 167                         ulong crc;
 168                         char *trailer;
 169
 170                         crc = crc32(0L, Z_NULL, 0);
 171                         crc = crc32(crc, (const Bytef *) data, data_len);
 172
 173                         trailer = *encoded + sizeof(http_encoding_gzip_header) + Z.total_out;
 174
 175                         /* LSB */
 176                         trailer[0] = (char) (crc & 0xFF);
 177                         trailer[1] = (char) ((crc >> 8) & 0xFF);
 178                         trailer[2] = (char) ((crc >> 16) & 0xFF);
 179                         trailer[3] = (char) ((crc >> 24) & 0xFF);
 180                         trailer[4] = (char) ((Z.total_in) & 0xFF);
 181                         trailer[5] = (char) ((Z.total_in >> 8) & 0xFF);
 182                         trailer[6] = (char) ((Z.total_in >> 16) & 0xFF);
 183                         trailer[7] = (char) ((Z.total_in >> 24) & 0xFF);
 184
 185                         *encoded_len = Z.total_out + sizeof(http_encoding_gzip_header) + 8;
 186                         (*encoded)[*encoded_len] = '\0';
 187                         return SUCCESS;
 188                 }
 189         }
 190
 191         efree(*encoded);
 192         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not gzencode data: %s", zError(status));
 193         return FAILURE;
 194 }
 195
 196 PHP_HTTP_API STATUS _http_encoding_gzdecode(const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC)
 197 {
 198         const char *encoded;
 199         size_t encoded_len;
 200
 201         if (    (data && data_len) &&
 202                         (SUCCESS == http_encoding_gzencode_verify(data, data_len, &encoded, &encoded_len)) &&
 203                         (SUCCESS == http_encoding_inflate(encoded, encoded_len, decoded, decoded_len))) {
 204                 http_encoding_gzdecode_verify(data, data_len, *decoded, *decoded_len);
 205                 return SUCCESS;
 206         }
 207
 208         return FAILURE;
 209 }
 210
 211 PHP_HTTP_API STATUS _http_encoding_deflate(int level, int zhdr, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
 212 {
 213         z_stream Z;
 214         STATUS status = Z_OK;
 215
 216         Z.zalloc = Z_NULL;
 217         Z.zfree  = Z_NULL;
 218         Z.opaque = Z_NULL;
 219         Z.data_type = Z_UNKNOWN;
 220         Z.next_in   = (Bytef *) data;
 221         Z.avail_in  = data_len;
 222         Z.avail_out = HTTP_ENCODING_BUFLEN(data_len) - 1;
 223         Z.next_out  = emalloc(HTTP_ENCODING_BUFLEN(data_len));
 224
 225         *encoded = (char *) Z.next_out;
 226
 227         if (Z_OK == (status = deflateInit2(&Z, level, Z_DEFLATED, zhdr ? MAX_WBITS : -MAX_WBITS, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) {
 228                 status = deflate(&Z, Z_FINISH);
 229                 deflateEnd(&Z);
 230
 231                 if (Z_STREAM_END == status) {
 232                         (*encoded)[*encoded_len = Z.total_out] = '\0';
 233                         return SUCCESS;
 234                 }
 235         }
 236
 237         efree(encoded);
 238         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not deflate data: %s", zError(status));
 239         return FAILURE;
 240 }
 241
 242 PHP_HTTP_API STATUS _http_encoding_inflate(const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC)
 243 {
 244         int max = 0, wbits = -MAX_WBITS;
 245         STATUS status;
 246         z_stream Z;
 247
 248         *decoded = NULL;
 249         *decoded_len = 0;
 250
 251 retry_inflate:
 252         do {
 253                 Z.zalloc = Z_NULL;
 254                 Z.zfree  = Z_NULL;
 255
 256                 if (!max) {
 257                         if (!*decoded) {
 258                                 *decoded_len = data_len * 2;
 259                                 *decoded = emalloc(*decoded_len + 1);
 260                         }
 261                 } else {
 262                         size_t new_len = *decoded_len << 2;
 263                         char *new_ptr = erealloc_recoverable(*decoded, new_len + 1);
 264
 265                         if (new_ptr) {
 266                                 *decoded = new_ptr;
 267                                 *decoded_len = new_len;
 268                         } else {
 269                                 max = INT_MAX-1; /* avoid integer overflow on increment op */
 270                         }
 271                 }
 272
 273                 Z.next_in   = (Bytef *) data;
 274                 Z.avail_in  = data_len;
 275                 Z.next_out  = (Bytef *) *decoded;
 276                 Z.avail_out = *decoded_len;
 277
 278                 if (Z_OK == (status = inflateInit2(&Z, wbits))) {
 279                         status = inflate(&Z, Z_FINISH);
 280                         inflateEnd(&Z);
 281
 282                         /* retry if it looks like we've got a zlib header */
 283                         if (wbits == -MAX_WBITS && status == Z_DATA_ERROR) {
 284                                 wbits = MAX_WBITS;
 285                                 goto retry_inflate;
 286                         }
 287
 288                         if (Z_STREAM_END == status) {
 289                                 (*decoded)[*decoded_len = Z.total_out] = '\0';
 290                                 return SUCCESS;
 291                         }
 292                 }
 293         } while (status == Z_BUF_ERROR && ++max < HTTP_ENCODING_MAXTRY);
 294
 295         efree(*decoded);
 296         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not inflate data: %s", zError(status));
 297         return FAILURE;
 298 }
 299
 300 PHP_HTTP_API STATUS _http_encoding_gzencode_verify(const char *data, size_t data_len, const char **encoded, size_t *encoded_len, int error_level TSRMLS_DC)
 301 {
 302         size_t offset = sizeof(http_encoding_gzip_header);
 303
 304         if (data_len < offset) {
 305                 goto really_bad_gzip_header;
 306         }
 307
 308         if (data[0] != (const char) 0x1F || data[1] != (const char) 0x8B) {
 309                 http_error_ex(error_level TSRMLS_CC, HTTP_E_ENCODING, "Unrecognized GZIP header start: 0x%02X 0x%02X", (int) data[0], (int) (data[1] & 0xFF));
 310                 return FAILURE;
 311         }
 312
 313         if (data[2] != (const char) Z_DEFLATED) {
 314                 http_error_ex(error_level TSRMLS_CC, HTTP_E_ENCODING, "Unrecognized compression format (%d)", (int) (data[2] & 0xFF));
 315                 /* still try to decode */
 316         }
 317         if ((data[3] & 0x4) == 0x4) {
 318                 if (data_len < offset + 2) {
 319                         goto really_bad_gzip_header;
 320                 }
 321                 /* there are extra fields, the length follows the common header as 2 bytes LSB */
 322                 offset += (unsigned) ((data[offset] & 0xFF));
 323                 offset += 1;
 324                 offset += (unsigned) ((data[offset] & 0xFF) << 8);
 325                 offset += 1;
 326         }
 327         if ((data[3] & 0x8) == 0x8) {
 328                 if (data_len <= offset) {
 329                         goto really_bad_gzip_header;
 330                 }
 331                 /* there's a file name */
 332                 offset += strlen(&data[offset]) + 1 /*NUL*/;
 333         }
 334         if ((data[3] & 0x10) == 0x10) {
 335                 if (data_len <= offset) {
 336                         goto really_bad_gzip_header;
 337                 }
 338                 /* there's a comment */
 339                 offset += strlen(&data[offset]) + 1 /* NUL */;
 340         }
 341         if ((data[3] & 0x2) == 0x2) {
 342                 /* there's a CRC16 of the header */
 343                 offset += 2;
 344                 if (data_len <= offset) {
 345                         goto really_bad_gzip_header;
 346                 } else {
 347                         ulong crc, cmp;
 348
 349                         cmp =  (unsigned) ((data[offset-2] & 0xFF));
 350                         cmp += (unsigned) ((data[offset-1] & 0xFF) << 8);
 351
 352                         crc = crc32(0L, Z_NULL, 0);
 353                         crc = crc32(crc, (const Bytef *) data, sizeof(http_encoding_gzip_header));
 354
 355                         if (cmp != (crc & 0xFFFF)) {
 356                                 http_error_ex(error_level TSRMLS_CC, HTTP_E_ENCODING, "GZIP headers CRC checksums so not match (%lu, %lu)", cmp, crc & 0xFFFF);
 357                                 return FAILURE;
 358                         }
 359                 }
 360         }
 361
 362         if (data_len < offset + 8) {
 363                 http_error(error_level TSRMLS_CC, HTTP_E_ENCODING, "Missing or truncated GZIP footer");
 364                 return FAILURE;
 365         }
 366
 367         if (encoded) {
 368                 *encoded = data + offset;
 369         }
 370         if (encoded_len) {
 371                 *encoded_len = data_len - offset - 8 /* size of the assumed GZIP footer */;
 372         }
 373
 374         return SUCCESS;
 375
 376 really_bad_gzip_header:
 377         http_error(error_level TSRMLS_CC, HTTP_E_ENCODING, "Missing or truncated GZIP header");
 378         return FAILURE;
 379 }
 380
 381 PHP_HTTP_API STATUS _http_encoding_gzdecode_verify(const char *data, size_t data_len, const char *decoded, size_t decoded_len, int error_level TSRMLS_DC)
 382 {
 383         STATUS status = SUCCESS;
 384         ulong len, cmp, crc;
 385
 386         crc = crc32(0L, Z_NULL, 0);
 387         crc = crc32(crc, (const Bytef *) decoded, decoded_len);
 388
 389         cmp  = (unsigned) ((data[data_len-8] & 0xFF));
 390         cmp += (unsigned) ((data[data_len-7] & 0xFF) << 8);
 391         cmp += (unsigned) ((data[data_len-6] & 0xFF) << 16);
 392         cmp += (unsigned) ((data[data_len-5] & 0xFF) << 24);
 393         len  = (unsigned) ((data[data_len-4] & 0xFF));
 394         len += (unsigned) ((data[data_len-3] & 0xFF) << 8);
 395         len += (unsigned) ((data[data_len-2] & 0xFF) << 16);
 396         len += (unsigned) ((data[data_len-1] & 0xFF) << 24);
 397
 398         if (cmp != crc) {
 399                 http_error_ex(error_level TSRMLS_CC, HTTP_E_ENCODING, "Could not verify data integrity: CRC checksums do not match (%lu, %lu)", cmp, crc);
 400                 status = FAILURE;
 401         }
 402         if (len != decoded_len) {
 403                 http_error_ex(error_level TSRMLS_CC, HTTP_E_ENCODING, "Could not verify data integrity: data sizes do not match (%lu, %lu)", len, decoded_len);
 404                 status = FAILURE;
 405         }
 406         return status;
 407 }
 408
 409 #define HTTP_ENCODING_STREAM_ERROR(status, tofree) \
 410         { \
 411                 if (tofree) efree(tofree); \
 412                 http_error_ex(HE_WARNING, HTTP_E_ENCODING, "GZIP stream error: %s", zError(status)); \
 413                 return FAILURE; \
 414         }
 415
 416 PHP_HTTP_API STATUS _http_encoding_stream_init(http_encoding_stream *s, int gzip, int level, char **encoded, size_t *encoded_len TSRMLS_DC)
 417 {
 418         STATUS status;
 419
 420         memset(s, 0, sizeof(http_encoding_stream));
 421         if (Z_OK != (status = deflateInit2(&s->Z, level, Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) {
 422                 HTTP_ENCODING_STREAM_ERROR(status, NULL);
 423         }
 424
 425         if ((s->gzip = gzip)) {
 426                 s->crc = crc32(0L, Z_NULL, 0);
 427                 *encoded_len = sizeof(http_encoding_gzip_header);
 428                 *encoded = emalloc(*encoded_len);
 429                 memcpy(*encoded, http_encoding_gzip_header, *encoded_len);
 430         } else {
 431                 *encoded_len = 0;
 432                 *encoded = NULL;
 433         }
 434
 435         return SUCCESS;
 436 }
 437
 438 PHP_HTTP_API STATUS _http_encoding_stream_update(http_encoding_stream *s, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
 439 {
 440         STATUS status;
 441
 442         *encoded_len = HTTP_ENCODING_BUFLEN(data_len);
 443         *encoded = emalloc(*encoded_len);
 444
 445         s->Z.next_in = (Bytef *) data;
 446         s->Z.avail_in = data_len;
 447         s->Z.next_out = (Bytef *) *encoded;
 448         s->Z.avail_out = *encoded_len;
 449
 450         status = deflate(&s->Z, Z_SYNC_FLUSH);
 451
 452         if (Z_OK != status && Z_STREAM_END != status) {
 453                 HTTP_ENCODING_STREAM_ERROR(status, *encoded);
 454         }
 455         *encoded_len -= s->Z.avail_out;
 456
 457         if (s->gzip) {
 458                 s->crc = crc32(s->crc, (const Bytef *) data, data_len);
 459         }
 460
 461         return SUCCESS;
 462 }
 463
 464 PHP_HTTP_API STATUS _http_encoding_stream_finish(http_encoding_stream *s, char **encoded, size_t *encoded_len TSRMLS_DC)
 465 {
 466         STATUS status;
 467
 468         *encoded_len = 1024;
 469         *encoded = emalloc(*encoded_len);
 470
 471         s->Z.next_out = (Bytef *) *encoded;
 472         s->Z.avail_out = *encoded_len;
 473
 474         if (Z_STREAM_END != (status = deflate(&s->Z, Z_FINISH)) || Z_OK != (status = deflateEnd(&s->Z))) {
 475                 HTTP_ENCODING_STREAM_ERROR(status, *encoded);
 476         }
 477
 478         *encoded_len -= s->Z.avail_out;
 479         if (s->gzip) {
 480                 if (s->Z.avail_out < 8) {
 481                         *encoded = erealloc(*encoded, *encoded_len + 8);
 482                 }
 483                 (*encoded)[(*encoded_len)++] = (char) (s->crc & 0xFF);
 484                 (*encoded)[(*encoded_len)++] = (char) ((s->crc >> 8) & 0xFF);
 485                 (*encoded)[(*encoded_len)++] = (char) ((s->crc >> 16) & 0xFF);
 486                 (*encoded)[(*encoded_len)++] = (char) ((s->crc >> 24) & 0xFF);
 487                 (*encoded)[(*encoded_len)++] = (char) ((s->Z.total_in) & 0xFF);
 488                 (*encoded)[(*encoded_len)++] = (char) ((s->Z.total_in >> 8) & 0xFF);
 489                 (*encoded)[(*encoded_len)++] = (char) ((s->Z.total_in >> 16) & 0xFF);
 490                 (*encoded)[(*encoded_len)++] = (char) ((s->Z.total_in >> 24) & 0xFF);
 491         }
 492
 493         return SUCCESS;
 494 }
 495
 496 #endif /* HTTP_HAVE_ZLIB */
 497
 498 PHP_HTTP_API zend_bool _http_encoding_response_start(size_t content_length TSRMLS_DC)
 499 {
 500         if (    php_ob_handler_used("ob_gzhandler" TSRMLS_CC) ||
 501                         php_ob_handler_used("zlib output compression" TSRMLS_CC)) {
 502                 HTTP_G(send).gzip_encoding = 0;
 503         } else {
 504                 if (!HTTP_G(send).gzip_encoding) {
 505                         /* emit a content-length header */
 506                         if (content_length) {
 507                                 char cl_header_str[128];
 508                                 size_t cl_header_len;
 509                                 cl_header_len = snprintf(cl_header_str, lenof(cl_header_str), "Content-Length: %zu", content_length);
 510                                 http_send_header_string_ex(cl_header_str, cl_header_len, 1);
 511                         }
 512                 } else {
 513 #ifndef HTTP_HAVE_ZLIB
 514                         HTTP_G(send).gzip_encoding = 0;
 515                         php_start_ob_buffer_named("ob_gzhandler", 0, 0 TSRMLS_CC);
 516 #else
 517                         HashTable *selected;
 518                         zval zsupported;
 519
 520                         INIT_PZVAL(&zsupported);
 521                         array_init(&zsupported);
 522                         add_next_index_stringl(&zsupported, "gzip", lenof("gzip"), 1);
 523                         add_next_index_stringl(&zsupported, "deflate", lenof("deflate"), 1);
 524
 525                         HTTP_G(send).gzip_encoding = 0;
 526
 527                         if ((selected = http_negotiate_encoding(&zsupported))) {
 528                                 STATUS hs = FAILURE;
 529                                 char *encoding = NULL;
 530                                 ulong idx;
 531
 532                                 if (HASH_KEY_IS_STRING == zend_hash_get_current_key(selected, &encoding, &idx, 0) && encoding) {
 533                                         if (!strcmp(encoding, "gzip")) {
 534                                                 if (SUCCESS == (hs = http_send_header_string("Content-Encoding: gzip"))) {
 535                                                         HTTP_G(send).gzip_encoding = HTTP_ENCODING_GZIP;
 536                                                 }
 537                                         } else if (!strcmp(encoding, "deflate")) {
 538                                                 if (SUCCESS == (hs = http_send_header_string("Content-Encoding: deflate"))) {
 539                                                         HTTP_G(send).gzip_encoding = HTTP_ENCODING_DEFLATE;
 540                                                 }
 541                                         }
 542                                         if (SUCCESS == hs) {
 543                                                 http_send_header_string("Vary: Accept-Encoding");
 544                                         }
 545                                 }
 546
 547                                 zend_hash_destroy(selected);
 548                                 FREE_HASHTABLE(selected);
 549                         }
 550
 551                         zval_dtor(&zsupported);
 552                         return HTTP_G(send).gzip_encoding;
 553 #endif
 554                 }
 555         }
 556         return 0;
 557 }
 558
 559 /*
 560  * Local variables:
 561  * tab-width: 4
 562  * c-basic-offset: 4
 563  * End:
 564  * vim600: noet sw=4 ts=4 fdm=marker
 565  * vim<600: noet sw=4 ts=4
 566  */
 567