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