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) 2004-2006, Michael Wallner <mike@php.net>            |
  10     +--------------------------------------------------------------------+
  11 */
  12
  13 /* $Id$ */
  14
  15 #define HTTP_WANT_ZLIB
  16 #include "php_http.h"
  17
  18 #include "php_http_api.h"
  19 #include "php_http_encoding_api.h"
  20 #include "php_http_send_api.h"
  21 #include "php_http_headers_api.h"
  22
  23 /* {{{ */
  24 #ifdef HTTP_HAVE_ZLIB
  25 PHP_MINIT_FUNCTION(http_encoding)
  26 {
  27         HTTP_LONG_CONSTANT("HTTP_DEFLATE_LEVEL_DEF", HTTP_DEFLATE_LEVEL_DEF);
  28         HTTP_LONG_CONSTANT("HTTP_DEFLATE_LEVEL_MIN", HTTP_DEFLATE_LEVEL_MIN);
  29         HTTP_LONG_CONSTANT("HTTP_DEFLATE_LEVEL_MAX", HTTP_DEFLATE_LEVEL_MAX);
  30         HTTP_LONG_CONSTANT("HTTP_DEFLATE_TYPE_ZLIB", HTTP_DEFLATE_TYPE_ZLIB);
  31         HTTP_LONG_CONSTANT("HTTP_DEFLATE_TYPE_GZIP", HTTP_DEFLATE_TYPE_GZIP);
  32         HTTP_LONG_CONSTANT("HTTP_DEFLATE_TYPE_RAW", HTTP_DEFLATE_TYPE_RAW);
  33         HTTP_LONG_CONSTANT("HTTP_DEFLATE_STRATEGY_DEF", HTTP_DEFLATE_STRATEGY_DEF);
  34         HTTP_LONG_CONSTANT("HTTP_DEFLATE_STRATEGY_FILT", HTTP_DEFLATE_STRATEGY_FILT);
  35         HTTP_LONG_CONSTANT("HTTP_DEFLATE_STRATEGY_HUFF", HTTP_DEFLATE_STRATEGY_HUFF);
  36         HTTP_LONG_CONSTANT("HTTP_DEFLATE_STRATEGY_RLE", HTTP_DEFLATE_STRATEGY_RLE);
  37         HTTP_LONG_CONSTANT("HTTP_DEFLATE_STRATEGY_FIXED", HTTP_DEFLATE_STRATEGY_FIXED);
  38
  39         HTTP_LONG_CONSTANT("HTTP_ENCODING_STREAM_FLUSH_NONE", HTTP_ENCODING_STREAM_FLUSH_NONE);
  40         HTTP_LONG_CONSTANT("HTTP_ENCODING_STREAM_FLUSH_SYNC", HTTP_ENCODING_STREAM_FLUSH_SYNC);
  41         HTTP_LONG_CONSTANT("HTTP_ENCODING_STREAM_FLUSH_FULL", HTTP_ENCODING_STREAM_FLUSH_FULL);
  42
  43         return SUCCESS;
  44 }
  45
  46 PHP_RINIT_FUNCTION(http_encoding)
  47 {
  48         if (HTTP_G->send.inflate.start_auto) {
  49                 php_ob_set_internal_handler(_http_ob_inflatehandler, HTTP_INFLATE_BUFFER_SIZE, "http inflate", 0 TSRMLS_CC);
  50         }
  51         if (HTTP_G->send.deflate.start_auto) {
  52                 php_ob_set_internal_handler(_http_ob_deflatehandler, HTTP_DEFLATE_BUFFER_SIZE, "http deflate", 0 TSRMLS_CC);
  53         }
  54         return SUCCESS;
  55 }
  56
  57 PHP_RSHUTDOWN_FUNCTION(http_encoding)
  58 {
  59         if (HTTP_G->send.deflate.stream) {
  60                 http_encoding_deflate_stream_free((http_encoding_stream **) &HTTP_G->send.deflate.stream);
  61         }
  62         if (HTTP_G->send.inflate.stream) {
  63                 http_encoding_inflate_stream_free((http_encoding_stream **) &HTTP_G->send.inflate.stream);
  64         }
  65         return SUCCESS;
  66 }
  67 #endif
  68 /* }}} */
  69
  70 /* {{{ eol_match(char **, int *) */
  71 static inline int eol_match(char **line, int *eol_len)
  72 {
  73         char *ptr = *line;
  74
  75         while (' ' == *ptr) ++ptr;
  76
  77         if (ptr == http_locate_eol(*line, eol_len)) {
  78                 *line = ptr;
  79                 return 1;
  80         } else {
  81                 return 0;
  82         }
  83 }
  84 /* }}} */
  85
  86 /* {{{ char *http_encoding_dechunk(char *, size_t, char **, size_t *) */
  87 PHP_HTTP_API const char *_http_encoding_dechunk(const char *encoded, size_t encoded_len, char **decoded, size_t *decoded_len TSRMLS_DC)
  88 {
  89         int eol_len = 0;
  90         char *n_ptr = NULL;
  91         const char *e_ptr = encoded;
  92
  93         *decoded_len = 0;
  94         *decoded = ecalloc(1, encoded_len);
  95
  96         while ((encoded + encoded_len - e_ptr) > 0) {
  97                 ulong chunk_len = 0, rest;
  98
  99                 chunk_len = strtoul(e_ptr, &n_ptr, 16);
 100
 101                 /* we could not read in chunk size */
 102                 if (n_ptr == e_ptr) {
 103                         /*
 104                          * if this is the first turn and there doesn't seem to be a chunk
 105                          * size at the begining of the body, do not fail on apparently
 106                          * not encoded data and return a copy
 107                          */
 108                         if (e_ptr == encoded) {
 109                                 http_error(HE_NOTICE, HTTP_E_ENCODING, "Data does not seem to be chunked encoded");
 110                                 memcpy(*decoded, encoded, encoded_len);
 111                                 *decoded_len = encoded_len;
 112                                 return encoded + encoded_len;
 113                         } else {
 114                                 efree(*decoded);
 115                                 http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Expected chunk size at pos %tu of %zu but got trash", n_ptr - encoded, encoded_len);
 116                                 return NULL;
 117                         }
 118                 }
 119
 120                 /* reached the end */
 121                 if (!chunk_len) {
 122                         /* move over '0' chunked encoding terminator */
 123                         while (*e_ptr == '0') ++e_ptr;
 124                         break;
 125                 }
 126
 127                 /* there should be CRLF after the chunk size, but we'll ignore SP+ too */
 128                 if (*n_ptr && !eol_match(&n_ptr, &eol_len)) {
 129                         if (eol_len == 2) {
 130                                 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));
 131                         } else {
 132                                 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);
 133                         }
 134                 }
 135                 n_ptr += eol_len;
 136
 137                 /* chunk size pretends more data than we actually got, so it's probably a truncated message */
 138                 if (chunk_len > (rest = encoded + encoded_len - n_ptr)) {
 139                         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);
 140                         chunk_len = rest;
 141                 }
 142
 143                 /* copy the chunk */
 144                 memcpy(*decoded + *decoded_len, n_ptr, chunk_len);
 145                 *decoded_len += chunk_len;
 146
 147                 if (chunk_len == rest) {
 148                         e_ptr = n_ptr + chunk_len;
 149                         break;
 150                 } else {
 151                         /* advance to next chunk */
 152                         e_ptr = n_ptr + chunk_len + eol_len;
 153                 }
 154         }
 155
 156         return e_ptr;
 157 }
 158 /* }}} */
 159
 160 /* {{{ int http_encoding_response_start(size_t) */
 161 PHP_HTTP_API int _http_encoding_response_start(size_t content_length TSRMLS_DC)
 162 {
 163         if (    php_ob_handler_used("ob_gzhandler" TSRMLS_CC) ||
 164                         php_ob_handler_used("zlib output compression" TSRMLS_CC)) {
 165                 HTTP_G->send.deflate.encoding = 0;
 166         } else {
 167                 if (!HTTP_G->send.deflate.encoding) {
 168                         /* emit a content-length header */
 169                         if (content_length) {
 170                                 char cl_header_str[128];
 171                                 size_t cl_header_len;
 172                                 cl_header_len = snprintf(cl_header_str, lenof(cl_header_str), "Content-Length: %zu", content_length);
 173                                 http_send_header_string_ex(cl_header_str, cl_header_len, 1);
 174                         }
 175                 } else {
 176 #ifndef HTTP_HAVE_ZLIB
 177                         HTTP_G->send.deflate.encoding = 0;
 178                         php_start_ob_buffer_named("ob_gzhandler", 0, 0 TSRMLS_CC);
 179 #else
 180                         HashTable *selected;
 181                         zval zsupported;
 182
 183                         INIT_PZVAL(&zsupported);
 184                         array_init(&zsupported);
 185                         add_next_index_stringl(&zsupported, "gzip", lenof("gzip"), 1);
 186                         add_next_index_stringl(&zsupported, "x-gzip", lenof("x-gzip"), 1);
 187                         add_next_index_stringl(&zsupported, "deflate", lenof("deflate"), 1);
 188
 189                         HTTP_G->send.deflate.encoding = 0;
 190
 191                         if ((selected = http_negotiate_encoding(&zsupported))) {
 192                                 STATUS hs = FAILURE;
 193                                 char *encoding = NULL;
 194                                 ulong idx;
 195
 196                                 if (HASH_KEY_IS_STRING == zend_hash_get_current_key(selected, &encoding, &idx, 0) && encoding) {
 197                                         if (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip")) {
 198                                                 if (SUCCESS == (hs = http_send_header_string("Content-Encoding: gzip"))) {
 199                                                         HTTP_G->send.deflate.encoding = HTTP_ENCODING_GZIP;
 200                                                 }
 201                                         } else if (!strcmp(encoding, "deflate")) {
 202                                                 if (SUCCESS == (hs = http_send_header_string("Content-Encoding: deflate"))) {
 203                                                         HTTP_G->send.deflate.encoding = HTTP_ENCODING_DEFLATE;
 204                                                 }
 205                                         }
 206                                         if (SUCCESS == hs) {
 207                                                 http_send_header_string("Vary: Accept-Encoding");
 208                                         }
 209                                 }
 210
 211                                 zend_hash_destroy(selected);
 212                                 FREE_HASHTABLE(selected);
 213                         }
 214
 215                         zval_dtor(&zsupported);
 216                         return HTTP_G->send.deflate.encoding;
 217 #endif
 218                 }
 219         }
 220         return 0;
 221 }
 222 /* }}} */
 223
 224 #ifdef HTTP_HAVE_ZLIB
 225
 226 /* {{{ inline int http_inflate_rounds */
 227 static inline int http_inflate_rounds(z_stream *Z, int flush, char **buf, size_t *len)
 228 {
 229         int status = 0, round = 0;
 230         phpstr buffer;
 231
 232         *buf = NULL;
 233         *len = 0;
 234
 235         phpstr_init_ex(&buffer, Z->avail_in, PHPSTR_INIT_PREALLOC);
 236
 237         do {
 238                 if (PHPSTR_NOMEM == phpstr_resize_ex(&buffer, buffer.size, 0, 1)) {
 239                         status = Z_MEM_ERROR;
 240                 } else {
 241                         Z->avail_out = buffer.free;
 242                         Z->next_out = (Bytef *) buffer.data + buffer.used;
 243 #if 0
 244                         fprintf(stderr, "\n%3d: %3d PRIOR: size=%7lu,\tfree=%7lu,\tused=%7lu,\tavail_in=%7lu,\tavail_out=%7lu\n", round, status, buffer.size, buffer.free, buffer.used, Z->avail_in, Z->avail_out);
 245 #endif
 246                         status = inflate(Z, flush);
 247
 248                         buffer.used += buffer.free - Z->avail_out;
 249                         buffer.free = Z->avail_out;
 250 #if 0
 251                         fprintf(stderr, "%3d: %3d AFTER: size=%7lu,\tfree=%7lu,\tused=%7lu,\tavail_in=%7lu,\tavail_out=%7lu\n", round, status, buffer.size, buffer.free, buffer.used, Z->avail_in, Z->avail_out);
 252 #endif
 253                         HTTP_INFLATE_BUFFER_SIZE_ALIGN(buffer.size);
 254                 }
 255         } while ((Z_BUF_ERROR == status || (Z_OK == status && Z->avail_in)) && ++round < HTTP_INFLATE_ROUNDS);
 256
 257         if (status == Z_OK || status == Z_STREAM_END) {
 258                 phpstr_shrink(&buffer);
 259                 phpstr_fix(&buffer);
 260                 *buf = buffer.data;
 261                 *len = buffer.used;
 262         } else {
 263                 phpstr_dtor(&buffer);
 264         }
 265
 266         return status;
 267 }
 268 /* }}} */
 269
 270 /* {{{ STATUS http_encoding_deflate(int, char *, size_t, char **, size_t *) */
 271 PHP_HTTP_API STATUS _http_encoding_deflate(int flags, const char *data, size_t data_len, char **encoded, size_t *encoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 272 {
 273         int status, level, wbits, strategy;
 274         z_stream Z;
 275
 276         HTTP_DEFLATE_LEVEL_SET(flags, level);
 277         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 278         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 279
 280         memset(&Z, 0, sizeof(z_stream));
 281         *encoded = NULL;
 282         *encoded_len = 0;
 283
 284         status = deflateInit2(&Z, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy);
 285         if (Z_OK == status) {
 286                 *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 287                 *encoded = emalloc_rel(*encoded_len);
 288
 289                 Z.next_in = (Bytef *) data;
 290                 Z.next_out = (Bytef *) *encoded;
 291                 Z.avail_in = data_len;
 292                 Z.avail_out = *encoded_len;
 293
 294                 status = deflate(&Z, Z_FINISH);
 295                 deflateEnd(&Z);
 296
 297                 if (Z_STREAM_END == status) {
 298                         /* size buffer down to actual length */
 299                         *encoded = erealloc_rel(*encoded, Z.total_out + 1);
 300                         (*encoded)[*encoded_len = Z.total_out] = '\0';
 301                         return SUCCESS;
 302                 } else {
 303                         STR_SET(*encoded, NULL);
 304                         *encoded_len = 0;
 305                 }
 306         }
 307
 308         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not deflate data: %s", zError(status));
 309         return FAILURE;
 310 }
 311 /* }}} */
 312
 313 /* {{{ STATUS http_encoding_inflate(char *, size_t, char **, size_t) */
 314 PHP_HTTP_API STATUS _http_encoding_inflate(const char *data, size_t data_len, char **decoded, size_t *decoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 315 {
 316         z_stream Z;
 317         int status, wbits = HTTP_WINDOW_BITS_ANY;
 318
 319         memset(&Z, 0, sizeof(z_stream));
 320
 321 retry_raw_inflate:
 322         status = inflateInit2(&Z, wbits);
 323         if (Z_OK == status) {
 324                 Z.next_in = (Bytef *) data;
 325                 Z.avail_in = data_len;
 326
 327                 switch (status = http_inflate_rounds(&Z, Z_NO_FLUSH, decoded, decoded_len)) {
 328                         case Z_OK:
 329                         case Z_STREAM_END:
 330                                 inflateEnd(&Z);
 331                                 return SUCCESS;
 332
 333                         case Z_DATA_ERROR:
 334                                 /* raw deflated data? */
 335                                 if (HTTP_WINDOW_BITS_ANY == wbits) {
 336                                         inflateEnd(&Z);
 337                                         wbits = HTTP_WINDOW_BITS_RAW;
 338                                         goto retry_raw_inflate;
 339                                 }
 340                 }
 341                 inflateEnd(&Z);
 342         }
 343
 344         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not inflate data: %s", zError(status));
 345         return FAILURE;
 346 }
 347 /* }}} */
 348
 349 /* {{{ http_encoding_stream *_http_encoding_deflate_stream_init(http_encoding_stream *, int) */
 350 PHP_HTTP_API http_encoding_stream *_http_encoding_deflate_stream_init(http_encoding_stream *s, int flags ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 351 {
 352         int status, level, wbits, strategy, free_stream;
 353
 354         if ((free_stream = !s)) {
 355                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 356         }
 357         memset(s, 0, sizeof(http_encoding_stream));
 358         s->flags = flags;
 359
 360         HTTP_DEFLATE_LEVEL_SET(flags, level);
 361         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 362         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 363
 364         if (Z_OK == (status = deflateInit2(&s->stream, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy))) {
 365                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 366
 367                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 368                         return s;
 369                 }
 370                 deflateEnd(&s->stream);
 371                 status = Z_MEM_ERROR;
 372         }
 373
 374         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize deflate encoding stream: %s", zError(status));
 375         if (free_stream) {
 376                 efree(s);
 377         }
 378         return NULL;
 379 }
 380 /* }}} */
 381
 382 /* {{{ http_encoding_stream *http_encoding_inflate_stream_init(http_encoding_stream *, int) */
 383 PHP_HTTP_API http_encoding_stream *_http_encoding_inflate_stream_init(http_encoding_stream *s, int flags ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 384 {
 385         int status, wbits, free_stream;
 386
 387         if ((free_stream = !s)) {
 388                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 389         }
 390         memset(s, 0, sizeof(http_encoding_stream));
 391         s->flags = flags;
 392
 393         HTTP_INFLATE_WBITS_SET(flags, wbits);
 394
 395         if (Z_OK == (status = inflateInit2(&s->stream, wbits))) {
 396                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 397
 398                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 399                         return s;
 400                 }
 401                 inflateEnd(&s->stream);
 402                 status = Z_MEM_ERROR;
 403         }
 404
 405         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize inflate stream: %s", zError(status));
 406         if (free_stream) {
 407                 efree(s);
 408         }
 409         return NULL;
 410 }
 411 /* }}} */
 412
 413 /* {{{ STATUS http_encoding_deflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 414 PHP_HTTP_API STATUS _http_encoding_deflate_stream_update(http_encoding_stream *s, const char *data, size_t data_len, char **encoded, size_t *encoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 415 {
 416         int status;
 417
 418         /* append input to our buffer */
 419         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 420
 421         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 422         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 423
 424         /* deflate */
 425         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 426         *encoded = emalloc_rel(*encoded_len);
 427         s->stream.avail_out = *encoded_len;
 428         s->stream.next_out = (Bytef *) *encoded;
 429
 430         switch (status = deflate(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags))) {
 431                 case Z_OK:
 432                 case Z_STREAM_END:
 433                         /* cut processed chunk off the buffer */
 434                         if (s->stream.avail_in) {
 435                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 436                         } else {
 437                                 phpstr_reset(PHPSTR(s->stream.opaque));
 438                         }
 439
 440                         /* size buffer down to actual size */
 441                         *encoded_len -= s->stream.avail_out;
 442                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 443                         (*encoded)[*encoded_len] = '\0';
 444                         return SUCCESS;
 445         }
 446
 447         STR_SET(*encoded, NULL);
 448         *encoded_len = 0;
 449         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update deflate stream: %s", zError(status));
 450         return FAILURE;
 451 }
 452 /* }}} */
 453
 454 /* {{{ STATUS http_encoding_inflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 455 PHP_HTTP_API STATUS _http_encoding_inflate_stream_update(http_encoding_stream *s, const char *data, size_t data_len, char **decoded, size_t *decoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 456 {
 457         int status;
 458
 459         /* append input to buffer */
 460         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 461
 462 retry_raw_inflate:
 463         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 464         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 465
 466         switch (status = http_inflate_rounds(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags), decoded, decoded_len)) {
 467                 case Z_OK:
 468                 case Z_STREAM_END:
 469                         /* cut off */
 470                         if (s->stream.avail_in) {
 471                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 472                         } else {
 473                                 phpstr_reset(PHPSTR(s->stream.opaque));
 474                         }
 475                         return SUCCESS;
 476
 477                 case Z_DATA_ERROR:
 478                         /* raw deflated data ? */
 479                         if (!(s->flags & HTTP_INFLATE_TYPE_RAW) && !s->stream.total_out) {
 480                                 inflateEnd(&s->stream);
 481                                 s->flags |= HTTP_INFLATE_TYPE_RAW;
 482                                 inflateInit2(&s->stream, HTTP_WINDOW_BITS_RAW);
 483                                 goto retry_raw_inflate;
 484                         }
 485         }
 486
 487         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update inflate stream: %s", zError(status));
 488         return FAILURE;
 489 }
 490 /* }}} */
 491
 492 /* {{{ STATUS http_encoding_deflate_stream_flush(http_encoding_stream *, char **, size_t *) */
 493 PHP_HTTP_API STATUS _http_encoding_deflate_stream_flush(http_encoding_stream *s, char **encoded, size_t *encoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 494 {
 495         int status;
 496
 497         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 498         *encoded = emalloc_rel(*encoded_len);
 499
 500         s->stream.avail_in = 0;
 501         s->stream.next_in = NULL;
 502         s->stream.avail_out = *encoded_len;
 503         s->stream.next_out = (Bytef *) *encoded;
 504
 505         switch (status = deflate(&s->stream, Z_FULL_FLUSH)) {
 506                 case Z_OK:
 507                 case Z_STREAM_END:
 508                         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE - s->stream.avail_out;
 509                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 510                         (*encoded)[*encoded_len] = '\0';
 511                         return SUCCESS;
 512         }
 513
 514         STR_SET(*encoded, NULL);
 515         *encoded_len = 0;
 516         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to flush deflate stream: %s", zError(status));
 517         return FAILURE;
 518 }
 519 /* }}} */
 520
 521 /* {{{ STATUS http_encoding_inflate_straem_flush(http_encoding_stream *, char **, size_t *) */
 522 PHP_HTTP_API STATUS _http_encoding_inflate_stream_flush(http_encoding_stream *s, char **decoded, size_t *decoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 523 {
 524         /* noop */
 525         *decoded = estrndup("", *decoded_len = 0);
 526         return SUCCESS;
 527 }
 528 /* }}} */
 529
 530 /* {{{ STATUS http_encoding_deflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 531 PHP_HTTP_API STATUS _http_encoding_deflate_stream_finish(http_encoding_stream *s, char **encoded, size_t *encoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 532 {
 533         int status;
 534
 535         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 536         *encoded = emalloc_rel(*encoded_len);
 537
 538         /* deflate remaining input */
 539         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 540         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 541
 542         s->stream.avail_out = *encoded_len;
 543         s->stream.next_out = (Bytef *) *encoded;
 544
 545         do {
 546                 status = deflate(&s->stream, Z_FINISH);
 547         } while (Z_OK == status);
 548
 549         if (Z_STREAM_END == status) {
 550                 /* cut processed intp off */
 551                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 552
 553                 /* size down */
 554                 *encoded_len -= s->stream.avail_out;
 555                 *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 556                 (*encoded)[*encoded_len] = '\0';
 557                 return SUCCESS;
 558         }
 559
 560         STR_SET(*encoded, NULL);
 561         *encoded_len = 0;
 562         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish deflate stream: %s", zError(status));
 563         return FAILURE;
 564 }
 565 /* }}} */
 566
 567 /* {{{ STATUS http_encoding_inflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 568 PHP_HTTP_API STATUS _http_encoding_inflate_stream_finish(http_encoding_stream *s, char **decoded, size_t *decoded_len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC TSRMLS_DC)
 569 {
 570         int status;
 571
 572         if (!PHPSTR_LEN(s->stream.opaque)) {
 573                 *decoded = NULL;
 574                 *decoded_len = 0;
 575                 return SUCCESS;
 576         }
 577
 578         *decoded_len = (PHPSTR_LEN(s->stream.opaque) + 1) * HTTP_INFLATE_ROUNDS;
 579         *decoded = emalloc_rel(*decoded_len);
 580
 581         /* inflate remaining input */
 582         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 583         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 584
 585         s->stream.avail_out = *decoded_len;
 586         s->stream.next_out = (Bytef *) *decoded;
 587
 588         if (Z_STREAM_END == (status = inflate(&s->stream, Z_FINISH))) {
 589                 /* cut processed input off */
 590                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 591
 592                 /* size down */
 593                 *decoded_len -= s->stream.avail_out;
 594                 *decoded = erealloc_rel(*decoded, *decoded_len + 1);
 595                 (*decoded)[*decoded_len] = '\0';
 596                 return SUCCESS;
 597         }
 598
 599         STR_SET(*decoded, NULL);
 600         *decoded_len = 0;
 601         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish inflate stream: %s", zError(status));
 602         return FAILURE;
 603 }
 604 /* }}} */
 605
 606 /* {{{ void http_encoding_deflate_stream_dtor(http_encoding_stream *) */
 607 PHP_HTTP_API void _http_encoding_deflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 608 {
 609         if (s) {
 610                 if (s->stream.opaque) {
 611                         phpstr_free((phpstr **) &s->stream.opaque);
 612                 }
 613                 deflateEnd(&s->stream);
 614         }
 615 }
 616 /* }}} */
 617
 618 /* {{{ void http_encoding_inflate_stream_dtor(http_encoding_stream *) */
 619 PHP_HTTP_API void _http_encoding_inflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 620 {
 621         if (s) {
 622                 if (s->stream.opaque) {
 623                         phpstr_free((phpstr **) &s->stream.opaque);
 624                 }
 625                 inflateEnd(&s->stream);
 626         }
 627 }
 628 /* }}} */
 629
 630 /* {{{ void http_encoding_deflate_stream_free(http_encoding_stream **) */
 631 PHP_HTTP_API void _http_encoding_deflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 632 {
 633         if (s) {
 634                 http_encoding_deflate_stream_dtor(*s);
 635                 if (*s) {
 636                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 637                 }
 638                 *s = NULL;
 639         }
 640 }
 641 /* }}} */
 642
 643 /* {{{ void http_encoding_inflate_stream_free(http_encoding_stream **) */
 644 PHP_HTTP_API void _http_encoding_inflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 645 {
 646         if (s) {
 647                 http_encoding_inflate_stream_dtor(*s);
 648                 if (*s) {
 649                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 650                 }
 651                 *s = NULL;
 652         }
 653 }
 654 /* }}} */
 655
 656 /* {{{ void http_ob_deflatehandler(char *, uint, char **, uint *, int) */
 657 void _http_ob_deflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 658 {
 659         *handled_output = NULL;
 660         *handled_output_len = 0;
 661
 662         if (mode & PHP_OUTPUT_HANDLER_START) {
 663                 int flags;
 664
 665                 if (HTTP_G->send.deflate.stream) {
 666                         zend_error(E_ERROR, "ob_deflatehandler() can only be used once");
 667                         return;
 668                 }
 669
 670                 HTTP_G->send.deflate.encoding = !0;
 671
 672                 switch (http_encoding_response_start(0)) {
 673                         case HTTP_ENCODING_GZIP:
 674                                 flags = HTTP_DEFLATE_TYPE_GZIP;
 675                                 break;
 676
 677                         case HTTP_ENCODING_DEFLATE:
 678                                 flags = HTTP_DEFLATE_TYPE_ZLIB;
 679                                 break;
 680
 681                         default:
 682                                 goto deflate_passthru_plain;
 683                 }
 684
 685                 flags |= (HTTP_G->send.deflate.start_flags &~ 0xf0);
 686                 HTTP_G->send.deflate.stream = http_encoding_deflate_stream_init(NULL, flags);
 687         }
 688
 689         if (HTTP_G->send.deflate.stream) {
 690                 http_encoding_deflate_stream_update((http_encoding_stream *) HTTP_G->send.deflate.stream, output, output_len, handled_output, handled_output_len);
 691
 692                 if (mode & PHP_OUTPUT_HANDLER_END) {
 693                         char *remaining = NULL;
 694                         size_t remaining_len = 0;
 695
 696                         http_encoding_deflate_stream_finish((http_encoding_stream *) HTTP_G->send.deflate.stream, &remaining, &remaining_len);
 697                         http_encoding_deflate_stream_free((http_encoding_stream **) &HTTP_G->send.deflate.stream);
 698                         if (remaining) {
 699                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 700                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 701                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 702                                 efree(remaining);
 703                         }
 704                 }
 705         } else {
 706 deflate_passthru_plain:
 707                 *handled_output = estrndup(output, *handled_output_len = output_len);
 708         }
 709 }
 710 /* }}} */
 711
 712 /* {{{ void http_ob_inflatehandler(char *, uint, char **, uint *, int) */
 713 void _http_ob_inflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 714 {
 715         *handled_output = NULL;
 716         *handled_output_len = 0;
 717
 718         if (mode & PHP_OUTPUT_HANDLER_START) {
 719                 if (HTTP_G->send.inflate.stream) {
 720                         zend_error(E_ERROR, "ob_inflatehandler() can only be used once");
 721                         return;
 722                 }
 723                 HTTP_G->send.inflate.stream = http_encoding_inflate_stream_init(NULL, (HTTP_G->send.inflate.start_flags &~ 0xf0));
 724         }
 725
 726         if (HTTP_G->send.inflate.stream) {
 727                 http_encoding_inflate_stream_update((http_encoding_stream *) HTTP_G->send.inflate.stream, output, output_len, handled_output, handled_output_len);
 728
 729                 if (mode & PHP_OUTPUT_HANDLER_END) {
 730                         char *remaining = NULL;
 731                         size_t remaining_len = 0;
 732
 733                         http_encoding_inflate_stream_finish((http_encoding_stream *) HTTP_G->send.inflate.stream, &remaining, &remaining_len);
 734                         http_encoding_inflate_stream_free((http_encoding_stream **) &HTTP_G->send.inflate.stream);
 735                         if (remaining) {
 736                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 737                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 738                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 739                                 efree(remaining);
 740                         }
 741                 }
 742         } else {
 743                 *handled_output = estrndup(output, *handled_output_len = output_len);
 744         }
 745 }
 746 /* }}} */
 747
 748 #endif /* HTTP_HAVE_ZLIB */
 749
 750 /*
 751  * Local variables:
 752  * tab-width: 4
 753  * c-basic-offset: 4
 754  * End:
 755  * vim600: noet sw=4 ts=4 fdm=marker
 756  * vim<600: noet sw=4 ts=4
 757  */
 758