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                         do {
 242                                 Z->avail_out = buffer.free;
 243                                 Z->next_out = (Bytef *) buffer.data + buffer.used;
 244 #if 0
 245                                 fprintf(stderr, "PRIOR: size=%lu, avail=%lu, used=%lu, (%d/%d)\n", buffer.size, Z->avail_out, buffer.used, status, round);
 246 #endif
 247                                 status = inflate(Z, flush);
 248
 249                                 buffer.used += buffer.free - Z->avail_out;
 250                                 buffer.free = Z->avail_out;
 251 #if 0
 252                                 fprintf(stderr, "AFTER: size=%lu, avail=%lu, used=%lu, (%d/%d)\n", buffer.size, Z->avail_out, buffer.used, status, round);
 253 #endif
 254                         } while (Z_OK == status && Z->avail_in);
 255
 256                         HTTP_INFLATE_BUFFER_SIZE_ALIGN(buffer.size);
 257                 }
 258         } while (Z_BUF_ERROR == status && ++round < HTTP_INFLATE_ROUNDS);
 259
 260         if (status == Z_OK || status == Z_STREAM_END) {
 261                 phpstr_shrink(&buffer);
 262                 phpstr_fix(&buffer);
 263                 *buf = buffer.data;
 264                 *len = buffer.used;
 265         } else {
 266                 phpstr_dtor(&buffer);
 267         }
 268
 269         return status;
 270 }
 271 /* }}} */
 272
 273 /* {{{ STATUS http_encoding_deflate(int, char *, size_t, char **, size_t *) */
 274 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)
 275 {
 276         int status, level, wbits, strategy;
 277         z_stream Z;
 278
 279         HTTP_DEFLATE_LEVEL_SET(flags, level);
 280         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 281         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 282
 283         memset(&Z, 0, sizeof(z_stream));
 284         *encoded = NULL;
 285         *encoded_len = 0;
 286
 287         status = deflateInit2(&Z, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy);
 288         if (Z_OK == status) {
 289                 *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 290                 *encoded = emalloc_rel(*encoded_len);
 291
 292                 Z.next_in = (Bytef *) data;
 293                 Z.next_out = (Bytef *) *encoded;
 294                 Z.avail_in = data_len;
 295                 Z.avail_out = *encoded_len;
 296
 297                 status = deflate(&Z, Z_FINISH);
 298                 deflateEnd(&Z);
 299
 300                 if (Z_STREAM_END == status) {
 301                         /* size buffer down to actual length */
 302                         *encoded = erealloc_rel(*encoded, Z.total_out + 1);
 303                         (*encoded)[*encoded_len = Z.total_out] = '\0';
 304                         return SUCCESS;
 305                 } else {
 306                         STR_SET(*encoded, NULL);
 307                         *encoded_len = 0;
 308                 }
 309         }
 310
 311         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not deflate data: %s", zError(status));
 312         return FAILURE;
 313 }
 314 /* }}} */
 315
 316 /* {{{ STATUS http_encoding_inflate(char *, size_t, char **, size_t) */
 317 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)
 318 {
 319         z_stream Z;
 320         int status, wbits = HTTP_WINDOW_BITS_ANY;
 321
 322         memset(&Z, 0, sizeof(z_stream));
 323
 324 retry_raw_inflate:
 325         status = inflateInit2(&Z, wbits);
 326         if (Z_OK == status) {
 327                 Z.next_in = (Bytef *) data;
 328                 Z.avail_in = data_len;
 329
 330                 switch (status = http_inflate_rounds(&Z, Z_NO_FLUSH, decoded, decoded_len)) {
 331                         case Z_OK:
 332                         case Z_STREAM_END:
 333                                 return SUCCESS;
 334
 335                         case Z_DATA_ERROR:
 336                                 /* raw deflated data? */
 337                                 if (HTTP_WINDOW_BITS_ANY == wbits) {
 338                                         inflateEnd(&Z);
 339                                         wbits = HTTP_WINDOW_BITS_RAW;
 340                                         goto retry_raw_inflate;
 341                                 }
 342                 }
 343                 inflateEnd(&Z);
 344         }
 345
 346         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not inflate data: %s", zError(status));
 347         return FAILURE;
 348 }
 349 /* }}} */
 350
 351 /* {{{ http_encoding_stream *_http_encoding_deflate_stream_init(http_encoding_stream *, int) */
 352 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)
 353 {
 354         int status, level, wbits, strategy, free_stream;
 355
 356         if ((free_stream = !s)) {
 357                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 358         }
 359         memset(s, 0, sizeof(http_encoding_stream));
 360         s->flags = flags;
 361
 362         HTTP_DEFLATE_LEVEL_SET(flags, level);
 363         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 364         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 365
 366         if (Z_OK == (status = deflateInit2(&s->stream, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy))) {
 367                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 368
 369                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 370                         return s;
 371                 }
 372                 deflateEnd(&s->stream);
 373                 status = Z_MEM_ERROR;
 374         }
 375
 376         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize deflate encoding stream: %s", zError(status));
 377         if (free_stream) {
 378                 efree(s);
 379         }
 380         return NULL;
 381 }
 382 /* }}} */
 383
 384 /* {{{ http_encoding_stream *http_encoding_inflate_stream_init(http_encoding_stream *, int) */
 385 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)
 386 {
 387         int status, wbits, free_stream;
 388
 389         if ((free_stream = !s)) {
 390                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 391         }
 392         memset(s, 0, sizeof(http_encoding_stream));
 393         s->flags = flags;
 394
 395         HTTP_INFLATE_WBITS_SET(flags, wbits);
 396
 397         if (Z_OK == (status = inflateInit2(&s->stream, wbits))) {
 398                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 399
 400                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 401                         return s;
 402                 }
 403                 inflateEnd(&s->stream);
 404                 status = Z_MEM_ERROR;
 405         }
 406
 407         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize inflate stream: %s", zError(status));
 408         if (free_stream) {
 409                 efree(s);
 410         }
 411         return NULL;
 412 }
 413 /* }}} */
 414
 415 /* {{{ STATUS http_encoding_deflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 416 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)
 417 {
 418         int status;
 419
 420         /* append input to our buffer */
 421         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 422
 423         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 424         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 425
 426         /* deflate */
 427         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 428         *encoded = emalloc_rel(*encoded_len);
 429         s->stream.avail_out = *encoded_len;
 430         s->stream.next_out = (Bytef *) *encoded;
 431
 432         switch (status = deflate(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags))) {
 433                 case Z_OK:
 434                 case Z_STREAM_END:
 435                         /* cut processed chunk off the buffer */
 436                         if (s->stream.avail_in) {
 437                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 438                         } else {
 439                                 phpstr_reset(PHPSTR(s->stream.opaque));
 440                         }
 441
 442                         /* size buffer down to actual size */
 443                         *encoded_len -= s->stream.avail_out;
 444                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 445                         (*encoded)[*encoded_len] = '\0';
 446                         return SUCCESS;
 447         }
 448
 449         STR_SET(*encoded, NULL);
 450         *encoded_len = 0;
 451         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update deflate stream: %s", zError(status));
 452         return FAILURE;
 453 }
 454 /* }}} */
 455
 456 /* {{{ STATUS http_encoding_inflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 457 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)
 458 {
 459         int status;
 460
 461         /* append input to buffer */
 462         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 463
 464 retry_raw_inflate:
 465         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 466         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 467
 468         switch (status = http_inflate_rounds(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags), decoded, decoded_len)) {
 469                 case Z_OK:
 470                 case Z_STREAM_END:
 471                         /* cut off */
 472                         if (s->stream.avail_in) {
 473                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 474                         } else {
 475                                 phpstr_reset(PHPSTR(s->stream.opaque));
 476                         }
 477                         return SUCCESS;
 478
 479                 case Z_DATA_ERROR:
 480                         /* raw deflated data ? */
 481                         if (!(s->flags & HTTP_INFLATE_TYPE_RAW) && !s->stream.total_out) {
 482                                 inflateEnd(&s->stream);
 483                                 s->flags |= HTTP_INFLATE_TYPE_RAW;
 484                                 inflateInit2(&s->stream, HTTP_WINDOW_BITS_RAW);
 485                                 goto retry_raw_inflate;
 486                         }
 487         }
 488
 489         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update inflate stream: %s", zError(status));
 490         return FAILURE;
 491 }
 492 /* }}} */
 493
 494 /* {{{ STATUS http_encoding_deflate_stream_flush(http_encoding_stream *, char **, size_t *) */
 495 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)
 496 {
 497         int status;
 498
 499         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 500         *encoded = emalloc_rel(*encoded_len);
 501
 502         s->stream.avail_in = 0;
 503         s->stream.next_in = NULL;
 504         s->stream.avail_out = *encoded_len;
 505         s->stream.next_out = (Bytef *) *encoded;
 506
 507         switch (status = deflate(&s->stream, Z_FULL_FLUSH)) {
 508                 case Z_OK:
 509                 case Z_STREAM_END:
 510                         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE - s->stream.avail_out;
 511                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 512                         (*encoded)[*encoded_len] = '\0';
 513                         return SUCCESS;
 514         }
 515
 516         STR_SET(*encoded, NULL);
 517         *encoded_len = 0;
 518         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to flush deflate stream: %s", zError(status));
 519         return FAILURE;
 520 }
 521 /* }}} */
 522
 523 /* {{{ STATUS http_encoding_inflate_straem_flush(http_encoding_stream *, char **, size_t *) */
 524 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)
 525 {
 526         /* noop */
 527         *decoded = estrndup("", *decoded_len = 0);
 528         return SUCCESS;
 529 }
 530 /* }}} */
 531
 532 /* {{{ STATUS http_encoding_deflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 533 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)
 534 {
 535         int status;
 536
 537         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 538         *encoded = emalloc_rel(*encoded_len);
 539
 540         /* deflate remaining input */
 541         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 542         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 543
 544         s->stream.avail_out = *encoded_len;
 545         s->stream.next_out = (Bytef *) *encoded;
 546
 547         do {
 548                 status = deflate(&s->stream, Z_FINISH);
 549         } while (Z_OK == status);
 550
 551         if (Z_STREAM_END == status) {
 552                 /* cut processed intp off */
 553                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 554
 555                 /* size down */
 556                 *encoded_len -= s->stream.avail_out;
 557                 *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 558                 (*encoded)[*encoded_len] = '\0';
 559                 return SUCCESS;
 560         }
 561
 562         STR_SET(*encoded, NULL);
 563         *encoded_len = 0;
 564         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish deflate stream: %s", zError(status));
 565         return FAILURE;
 566 }
 567 /* }}} */
 568
 569 /* {{{ STATUS http_encoding_inflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 570 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)
 571 {
 572         int status;
 573
 574         if (!PHPSTR_LEN(s->stream.opaque)) {
 575                 *decoded = NULL;
 576                 *decoded_len = 0;
 577                 return SUCCESS;
 578         }
 579
 580         *decoded_len = (PHPSTR_LEN(s->stream.opaque) + 1) * HTTP_INFLATE_ROUNDS;
 581         *decoded = emalloc_rel(*decoded_len);
 582
 583         /* inflate remaining input */
 584         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 585         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 586
 587         s->stream.avail_out = *decoded_len;
 588         s->stream.next_out = (Bytef *) *decoded;
 589
 590         if (Z_STREAM_END == (status = inflate(&s->stream, Z_FINISH))) {
 591                 /* cut processed input off */
 592                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 593
 594                 /* size down */
 595                 *decoded_len -= s->stream.avail_out;
 596                 *decoded = erealloc_rel(*decoded, *decoded_len + 1);
 597                 (*decoded)[*decoded_len] = '\0';
 598                 return SUCCESS;
 599         }
 600
 601         STR_SET(*decoded, NULL);
 602         *decoded_len = 0;
 603         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish inflate stream: %s", zError(status));
 604         return FAILURE;
 605 }
 606 /* }}} */
 607
 608 /* {{{ void http_encoding_deflate_stream_dtor(http_encoding_stream *) */
 609 PHP_HTTP_API void _http_encoding_deflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 610 {
 611         if (s) {
 612                 if (s->stream.opaque) {
 613                         phpstr_free((phpstr **) &s->stream.opaque);
 614                 }
 615                 deflateEnd(&s->stream);
 616         }
 617 }
 618 /* }}} */
 619
 620 /* {{{ void http_encoding_inflate_stream_dtor(http_encoding_stream *) */
 621 PHP_HTTP_API void _http_encoding_inflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 622 {
 623         if (s) {
 624                 if (s->stream.opaque) {
 625                         phpstr_free((phpstr **) &s->stream.opaque);
 626                 }
 627                 inflateEnd(&s->stream);
 628         }
 629 }
 630 /* }}} */
 631
 632 /* {{{ void http_encoding_deflate_stream_free(http_encoding_stream **) */
 633 PHP_HTTP_API void _http_encoding_deflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 634 {
 635         if (s) {
 636                 http_encoding_deflate_stream_dtor(*s);
 637                 if (*s) {
 638                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 639                 }
 640                 *s = NULL;
 641         }
 642 }
 643 /* }}} */
 644
 645 /* {{{ void http_encoding_inflate_stream_free(http_encoding_stream **) */
 646 PHP_HTTP_API void _http_encoding_inflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 647 {
 648         if (s) {
 649                 http_encoding_inflate_stream_dtor(*s);
 650                 if (*s) {
 651                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 652                 }
 653                 *s = NULL;
 654         }
 655 }
 656 /* }}} */
 657
 658 /* {{{ void http_ob_deflatehandler(char *, uint, char **, uint *, int) */
 659 void _http_ob_deflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 660 {
 661         *handled_output = NULL;
 662         *handled_output_len = 0;
 663
 664         if (mode & PHP_OUTPUT_HANDLER_START) {
 665                 int flags;
 666
 667                 if (HTTP_G->send.deflate.stream) {
 668                         zend_error(E_ERROR, "ob_deflatehandler() can only be used once");
 669                         return;
 670                 }
 671
 672                 HTTP_G->send.deflate.encoding = !0;
 673
 674                 switch (http_encoding_response_start(0)) {
 675                         case HTTP_ENCODING_GZIP:
 676                                 flags = HTTP_DEFLATE_TYPE_GZIP;
 677                                 break;
 678
 679                         case HTTP_ENCODING_DEFLATE:
 680                                 flags = HTTP_DEFLATE_TYPE_ZLIB;
 681                                 break;
 682
 683                         default:
 684                                 goto deflate_passthru_plain;
 685                 }
 686
 687                 flags |= (HTTP_G->send.deflate.start_flags &~ 0xf0);
 688                 HTTP_G->send.deflate.stream = http_encoding_deflate_stream_init(NULL, flags);
 689         }
 690
 691         if (HTTP_G->send.deflate.stream) {
 692                 http_encoding_deflate_stream_update((http_encoding_stream *) HTTP_G->send.deflate.stream, output, output_len, handled_output, handled_output_len);
 693
 694                 if (mode & PHP_OUTPUT_HANDLER_END) {
 695                         char *remaining = NULL;
 696                         size_t remaining_len = 0;
 697
 698                         http_encoding_deflate_stream_finish((http_encoding_stream *) HTTP_G->send.deflate.stream, &remaining, &remaining_len);
 699                         http_encoding_deflate_stream_free((http_encoding_stream **) &HTTP_G->send.deflate.stream);
 700                         if (remaining) {
 701                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 702                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 703                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 704                                 efree(remaining);
 705                         }
 706                 }
 707         } else {
 708 deflate_passthru_plain:
 709                 *handled_output = estrndup(output, *handled_output_len = output_len);
 710         }
 711 }
 712 /* }}} */
 713
 714 /* {{{ void http_ob_inflatehandler(char *, uint, char **, uint *, int) */
 715 void _http_ob_inflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 716 {
 717         *handled_output = NULL;
 718         *handled_output_len = 0;
 719
 720         if (mode & PHP_OUTPUT_HANDLER_START) {
 721                 if (HTTP_G->send.inflate.stream) {
 722                         zend_error(E_ERROR, "ob_inflatehandler() can only be used once");
 723                         return;
 724                 }
 725                 HTTP_G->send.inflate.stream = http_encoding_inflate_stream_init(NULL, (HTTP_G->send.inflate.start_flags &~ 0xf0));
 726         }
 727
 728         if (HTTP_G->send.inflate.stream) {
 729                 http_encoding_inflate_stream_update((http_encoding_stream *) HTTP_G->send.inflate.stream, output, output_len, handled_output, handled_output_len);
 730
 731                 if (mode & PHP_OUTPUT_HANDLER_END) {
 732                         char *remaining = NULL;
 733                         size_t remaining_len = 0;
 734
 735                         http_encoding_inflate_stream_finish((http_encoding_stream *) HTTP_G->send.inflate.stream, &remaining, &remaining_len);
 736                         http_encoding_inflate_stream_free((http_encoding_stream **) &HTTP_G->send.inflate.stream);
 737                         if (remaining) {
 738                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 739                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 740                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 741                                 efree(remaining);
 742                         }
 743                 }
 744         } else {
 745                 *handled_output = estrndup(output, *handled_output_len = output_len);
 746         }
 747 }
 748 /* }}} */
 749
 750 #endif /* HTTP_HAVE_ZLIB */
 751
 752 /*
 753  * Local variables:
 754  * tab-width: 4
 755  * c-basic-offset: 4
 756  * End:
 757  * vim600: noet sw=4 ts=4 fdm=marker
 758  * vim<600: noet sw=4 ts=4
 759  */
 760