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) 2004-2007, 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, zend_bool ignore_http_ohandler TSRMLS_DC)
 162 {
 163         int response = HTTP_G->send.deflate.response;
 164         int ohandler = php_ob_handler_used("ob_gzhandler" TSRMLS_CC) || php_ob_handler_used("zlib output compression" TSRMLS_CC);
 165
 166         if (!ohandler && !ignore_http_ohandler) {
 167                 ohandler = php_ob_handler_used("ob_deflatehandler" TSRMLS_CC) || php_ob_handler_used("http deflate" TSRMLS_CC);
 168         }
 169
 170         if (response && !ohandler) {
 171 #ifdef HTTP_HAVE_ZLIB
 172                 HashTable *selected;
 173                 zval zsupported;
 174
 175                 HTTP_G->send.deflate.encoding = 0;
 176
 177                 INIT_PZVAL(&zsupported);
 178                 array_init(&zsupported);
 179                 add_next_index_stringl(&zsupported, "gzip", lenof("gzip"), 1);
 180                 add_next_index_stringl(&zsupported, "x-gzip", lenof("x-gzip"), 1);
 181                 add_next_index_stringl(&zsupported, "deflate", lenof("deflate"), 1);
 182
 183                 if ((selected = http_negotiate_encoding(&zsupported))) {
 184                         STATUS hs = FAILURE;
 185                         char *encoding = NULL;
 186                         ulong idx;
 187
 188                         if (HASH_KEY_IS_STRING == zend_hash_get_current_key(selected, &encoding, &idx, 0) && encoding) {
 189                                 if (!strcmp(encoding, "gzip") || !strcmp(encoding, "x-gzip")) {
 190                                         if (SUCCESS == (hs = http_send_header_string("Content-Encoding: gzip"))) {
 191                                                 HTTP_G->send.deflate.encoding = HTTP_ENCODING_GZIP;
 192                                         }
 193                                 } else if (!strcmp(encoding, "deflate")) {
 194                                         if (SUCCESS == (hs = http_send_header_string("Content-Encoding: deflate"))) {
 195                                                 HTTP_G->send.deflate.encoding = HTTP_ENCODING_DEFLATE;
 196                                         }
 197                                 }
 198                                 if (SUCCESS == hs) {
 199                                         http_send_header_string("Vary: Accept-Encoding");
 200                                 }
 201                         }
 202
 203                         zend_hash_destroy(selected);
 204                         FREE_HASHTABLE(selected);
 205                 }
 206
 207                 zval_dtor(&zsupported);
 208 #else
 209                 HTTP_G->send.deflate.encoding = 0;
 210                 php_start_ob_buffer_named("ob_gzhandler", 0, 0 TSRMLS_CC);
 211 #endif /* HTTP_HAVE_ZLIB */
 212         } else if (content_length && !ohandler) {
 213                 /* emit a content-length header */
 214                 char cl_header_str[128];
 215                 size_t cl_header_len;
 216                 cl_header_len = snprintf(cl_header_str, sizeof(cl_header_str), "Content-Length: %zu", content_length);
 217                 http_send_header_string_ex(cl_header_str, cl_header_len, 1);
 218         } else {
 219                 HTTP_G->send.deflate.encoding = 0;
 220         }
 221
 222         return HTTP_G->send.deflate.encoding;
 223 }
 224 /* }}} */
 225
 226 #ifdef HTTP_HAVE_ZLIB
 227
 228 /* {{{ inline int http_inflate_rounds */
 229 static inline int http_inflate_rounds(z_stream *Z, int flush, char **buf, size_t *len)
 230 {
 231         int status = 0, round = 0;
 232         phpstr buffer;
 233
 234         *buf = NULL;
 235         *len = 0;
 236
 237         phpstr_init_ex(&buffer, Z->avail_in, PHPSTR_INIT_PREALLOC);
 238
 239         do {
 240                 if (PHPSTR_NOMEM == phpstr_resize_ex(&buffer, buffer.size, 0, 1)) {
 241                         status = Z_MEM_ERROR;
 242                 } else {
 243                         Z->avail_out = buffer.free;
 244                         Z->next_out = (Bytef *) buffer.data + buffer.used;
 245 #if 0
 246                         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);
 247 #endif
 248                         status = inflate(Z, flush);
 249
 250                         buffer.used += buffer.free - Z->avail_out;
 251                         buffer.free = Z->avail_out;
 252 #if 0
 253                         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);
 254 #endif
 255                         HTTP_INFLATE_BUFFER_SIZE_ALIGN(buffer.size);
 256                 }
 257         } while ((Z_BUF_ERROR == status || (Z_OK == status && Z->avail_in)) && ++round < HTTP_INFLATE_ROUNDS);
 258
 259         if (status == Z_OK || status == Z_STREAM_END) {
 260                 phpstr_shrink(&buffer);
 261                 phpstr_fix(&buffer);
 262                 *buf = buffer.data;
 263                 *len = buffer.used;
 264         } else {
 265                 phpstr_dtor(&buffer);
 266         }
 267
 268         return status;
 269 }
 270 /* }}} */
 271
 272 /* {{{ STATUS http_encoding_deflate(int, char *, size_t, char **, size_t *) */
 273 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)
 274 {
 275         int status, level, wbits, strategy;
 276         z_stream Z;
 277
 278         HTTP_DEFLATE_LEVEL_SET(flags, level);
 279         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 280         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 281
 282         memset(&Z, 0, sizeof(z_stream));
 283         *encoded = NULL;
 284         *encoded_len = 0;
 285
 286         status = deflateInit2(&Z, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy);
 287         if (Z_OK == status) {
 288                 *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 289                 *encoded = emalloc_rel(*encoded_len);
 290
 291                 Z.next_in = (Bytef *) data;
 292                 Z.next_out = (Bytef *) *encoded;
 293                 Z.avail_in = data_len;
 294                 Z.avail_out = *encoded_len;
 295
 296                 status = deflate(&Z, Z_FINISH);
 297                 deflateEnd(&Z);
 298
 299                 if (Z_STREAM_END == status) {
 300                         /* size buffer down to actual length */
 301                         *encoded = erealloc_rel(*encoded, Z.total_out + 1);
 302                         (*encoded)[*encoded_len = Z.total_out] = '\0';
 303                         return SUCCESS;
 304                 } else {
 305                         STR_SET(*encoded, NULL);
 306                         *encoded_len = 0;
 307                 }
 308         }
 309
 310         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not deflate data: %s", zError(status));
 311         return FAILURE;
 312 }
 313 /* }}} */
 314
 315 /* {{{ STATUS http_encoding_inflate(char *, size_t, char **, size_t) */
 316 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)
 317 {
 318         z_stream Z;
 319         int status, wbits = HTTP_WINDOW_BITS_ANY;
 320
 321         memset(&Z, 0, sizeof(z_stream));
 322
 323 retry_raw_inflate:
 324         status = inflateInit2(&Z, wbits);
 325         if (Z_OK == status) {
 326                 Z.next_in = (Bytef *) data;
 327                 Z.avail_in = data_len;
 328
 329                 switch (status = http_inflate_rounds(&Z, Z_NO_FLUSH, decoded, decoded_len)) {
 330                         case Z_STREAM_END:
 331                                 inflateEnd(&Z);
 332                                 return SUCCESS;
 333
 334                         case Z_OK:
 335                                 status = Z_DATA_ERROR;
 336                                 break;
 337
 338                         case Z_DATA_ERROR:
 339                                 /* raw deflated data? */
 340                                 if (HTTP_WINDOW_BITS_ANY == wbits) {
 341                                         inflateEnd(&Z);
 342                                         wbits = HTTP_WINDOW_BITS_RAW;
 343                                         goto retry_raw_inflate;
 344                                 }
 345                 }
 346                 inflateEnd(&Z);
 347         }
 348
 349         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not inflate data: %s", zError(status));
 350         return FAILURE;
 351 }
 352 /* }}} */
 353
 354 /* {{{ http_encoding_stream *_http_encoding_deflate_stream_init(http_encoding_stream *, int) */
 355 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)
 356 {
 357         int status, level, wbits, strategy, free_stream;
 358
 359         if ((free_stream = !s)) {
 360                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 361         }
 362         memset(s, 0, sizeof(http_encoding_stream));
 363         s->flags = flags;
 364
 365         HTTP_DEFLATE_LEVEL_SET(flags, level);
 366         HTTP_DEFLATE_WBITS_SET(flags, wbits);
 367         HTTP_DEFLATE_STRATEGY_SET(flags, strategy);
 368
 369         if (Z_OK == (status = deflateInit2(&s->stream, level, Z_DEFLATED, wbits, MAX_MEM_LEVEL, strategy))) {
 370                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 371
 372                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 373                         return s;
 374                 }
 375                 deflateEnd(&s->stream);
 376                 status = Z_MEM_ERROR;
 377         }
 378
 379         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize deflate encoding stream: %s", zError(status));
 380         if (free_stream) {
 381                 efree(s);
 382         }
 383         return NULL;
 384 }
 385 /* }}} */
 386
 387 /* {{{ http_encoding_stream *http_encoding_inflate_stream_init(http_encoding_stream *, int) */
 388 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)
 389 {
 390         int status, wbits, free_stream;
 391
 392         if ((free_stream = !s)) {
 393                 s = pemalloc_rel(sizeof(http_encoding_stream), (flags & HTTP_ENCODING_STREAM_PERSISTENT));
 394         }
 395         memset(s, 0, sizeof(http_encoding_stream));
 396         s->flags = flags;
 397
 398         HTTP_INFLATE_WBITS_SET(flags, wbits);
 399
 400         if (Z_OK == (status = inflateInit2(&s->stream, wbits))) {
 401                 int p = (flags & HTTP_ENCODING_STREAM_PERSISTENT) ? PHPSTR_INIT_PERSISTENT:0;
 402
 403                 if ((s->stream.opaque = phpstr_init_ex(NULL, HTTP_DEFLATE_BUFFER_SIZE, p))) {
 404                         return s;
 405                 }
 406                 inflateEnd(&s->stream);
 407                 status = Z_MEM_ERROR;
 408         }
 409
 410         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to initialize inflate stream: %s", zError(status));
 411         if (free_stream) {
 412                 efree(s);
 413         }
 414         return NULL;
 415 }
 416 /* }}} */
 417
 418 /* {{{ STATUS http_encoding_deflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 419 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)
 420 {
 421         int status;
 422
 423         /* append input to our buffer */
 424         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 425
 426         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 427         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 428
 429         /* deflate */
 430         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE_GUESS(data_len);
 431         *encoded = emalloc_rel(*encoded_len);
 432         s->stream.avail_out = *encoded_len;
 433         s->stream.next_out = (Bytef *) *encoded;
 434
 435         switch (status = deflate(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags))) {
 436                 case Z_OK:
 437                 case Z_STREAM_END:
 438                         /* cut processed chunk off the buffer */
 439                         if (s->stream.avail_in) {
 440                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 441                         } else {
 442                                 phpstr_reset(PHPSTR(s->stream.opaque));
 443                         }
 444
 445                         /* size buffer down to actual size */
 446                         *encoded_len -= s->stream.avail_out;
 447                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 448                         (*encoded)[*encoded_len] = '\0';
 449                         return SUCCESS;
 450         }
 451
 452         STR_SET(*encoded, NULL);
 453         *encoded_len = 0;
 454         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update deflate stream: %s", zError(status));
 455         return FAILURE;
 456 }
 457 /* }}} */
 458
 459 /* {{{ STATUS http_encoding_inflate_stream_update(http_encoding_stream *, char *, size_t, char **, size_t *) */
 460 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)
 461 {
 462         int status;
 463
 464         /* append input to buffer */
 465         phpstr_append(PHPSTR(s->stream.opaque), data, data_len);
 466
 467 retry_raw_inflate:
 468         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 469         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 470
 471         switch (status = http_inflate_rounds(&s->stream, HTTP_ENCODING_STREAM_FLUSH_FLAG(s->flags), decoded, decoded_len)) {
 472                 case Z_OK:
 473                 case Z_STREAM_END:
 474                         /* cut off */
 475                         if (s->stream.avail_in) {
 476                                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 477                         } else {
 478                                 phpstr_reset(PHPSTR(s->stream.opaque));
 479                         }
 480                         return SUCCESS;
 481
 482                 case Z_DATA_ERROR:
 483                         /* raw deflated data ? */
 484                         if (!(s->flags & HTTP_INFLATE_TYPE_RAW) && !s->stream.total_out) {
 485                                 inflateEnd(&s->stream);
 486                                 s->flags |= HTTP_INFLATE_TYPE_RAW;
 487                                 inflateInit2(&s->stream, HTTP_WINDOW_BITS_RAW);
 488                                 goto retry_raw_inflate;
 489                         }
 490         }
 491
 492         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to update inflate stream: %s", zError(status));
 493         return FAILURE;
 494 }
 495 /* }}} */
 496
 497 /* {{{ STATUS http_encoding_deflate_stream_flush(http_encoding_stream *, char **, size_t *) */
 498 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)
 499 {
 500         int status;
 501
 502         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 503         *encoded = emalloc_rel(*encoded_len);
 504
 505         s->stream.avail_in = 0;
 506         s->stream.next_in = NULL;
 507         s->stream.avail_out = *encoded_len;
 508         s->stream.next_out = (Bytef *) *encoded;
 509
 510         switch (status = deflate(&s->stream, Z_FULL_FLUSH)) {
 511                 case Z_OK:
 512                 case Z_STREAM_END:
 513                         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE - s->stream.avail_out;
 514                         *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 515                         (*encoded)[*encoded_len] = '\0';
 516                         return SUCCESS;
 517         }
 518
 519         STR_SET(*encoded, NULL);
 520         *encoded_len = 0;
 521         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to flush deflate stream: %s", zError(status));
 522         return FAILURE;
 523 }
 524 /* }}} */
 525
 526 /* {{{ STATUS http_encoding_inflate_straem_flush(http_encoding_stream *, char **, size_t *) */
 527 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)
 528 {
 529         /* noop */
 530         *decoded = estrndup("", *decoded_len = 0);
 531         return SUCCESS;
 532 }
 533 /* }}} */
 534
 535 /* {{{ STATUS http_encoding_deflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 536 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)
 537 {
 538         int status;
 539
 540         *encoded_len = HTTP_DEFLATE_BUFFER_SIZE;
 541         *encoded = emalloc_rel(*encoded_len);
 542
 543         /* deflate remaining input */
 544         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 545         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 546
 547         s->stream.avail_out = *encoded_len;
 548         s->stream.next_out = (Bytef *) *encoded;
 549
 550         do {
 551                 status = deflate(&s->stream, Z_FINISH);
 552         } while (Z_OK == status);
 553
 554         if (Z_STREAM_END == status) {
 555                 /* cut processed intp off */
 556                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 557
 558                 /* size down */
 559                 *encoded_len -= s->stream.avail_out;
 560                 *encoded = erealloc_rel(*encoded, *encoded_len + 1);
 561                 (*encoded)[*encoded_len] = '\0';
 562                 return SUCCESS;
 563         }
 564
 565         STR_SET(*encoded, NULL);
 566         *encoded_len = 0;
 567         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish deflate stream: %s", zError(status));
 568         return FAILURE;
 569 }
 570 /* }}} */
 571
 572 /* {{{ STATUS http_encoding_inflate_stream_finish(http_encoding_stream *, char **, size_t *) */
 573 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)
 574 {
 575         int status;
 576
 577         if (!PHPSTR_LEN(s->stream.opaque)) {
 578                 *decoded = NULL;
 579                 *decoded_len = 0;
 580                 return SUCCESS;
 581         }
 582
 583         *decoded_len = (PHPSTR_LEN(s->stream.opaque) + 1) * HTTP_INFLATE_ROUNDS;
 584         *decoded = emalloc_rel(*decoded_len);
 585
 586         /* inflate remaining input */
 587         s->stream.next_in = (Bytef *) PHPSTR_VAL(s->stream.opaque);
 588         s->stream.avail_in = PHPSTR_LEN(s->stream.opaque);
 589
 590         s->stream.avail_out = *decoded_len;
 591         s->stream.next_out = (Bytef *) *decoded;
 592
 593         if (Z_STREAM_END == (status = inflate(&s->stream, Z_FINISH))) {
 594                 /* cut processed input off */
 595                 phpstr_cut(PHPSTR(s->stream.opaque), 0, PHPSTR_LEN(s->stream.opaque) - s->stream.avail_in);
 596
 597                 /* size down */
 598                 *decoded_len -= s->stream.avail_out;
 599                 *decoded = erealloc_rel(*decoded, *decoded_len + 1);
 600                 (*decoded)[*decoded_len] = '\0';
 601                 return SUCCESS;
 602         }
 603
 604         STR_SET(*decoded, NULL);
 605         *decoded_len = 0;
 606         http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Failed to finish inflate stream: %s", zError(status));
 607         return FAILURE;
 608 }
 609 /* }}} */
 610
 611 /* {{{ void http_encoding_deflate_stream_dtor(http_encoding_stream *) */
 612 PHP_HTTP_API void _http_encoding_deflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 613 {
 614         if (s) {
 615                 if (s->stream.opaque) {
 616                         phpstr_free((phpstr **) &s->stream.opaque);
 617                 }
 618                 deflateEnd(&s->stream);
 619         }
 620 }
 621 /* }}} */
 622
 623 /* {{{ void http_encoding_inflate_stream_dtor(http_encoding_stream *) */
 624 PHP_HTTP_API void _http_encoding_inflate_stream_dtor(http_encoding_stream *s TSRMLS_DC)
 625 {
 626         if (s) {
 627                 if (s->stream.opaque) {
 628                         phpstr_free((phpstr **) &s->stream.opaque);
 629                 }
 630                 inflateEnd(&s->stream);
 631         }
 632 }
 633 /* }}} */
 634
 635 /* {{{ void http_encoding_deflate_stream_free(http_encoding_stream **) */
 636 PHP_HTTP_API void _http_encoding_deflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 637 {
 638         if (s) {
 639                 http_encoding_deflate_stream_dtor(*s);
 640                 if (*s) {
 641                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 642                 }
 643                 *s = NULL;
 644         }
 645 }
 646 /* }}} */
 647
 648 /* {{{ void http_encoding_inflate_stream_free(http_encoding_stream **) */
 649 PHP_HTTP_API void _http_encoding_inflate_stream_free(http_encoding_stream **s TSRMLS_DC)
 650 {
 651         if (s) {
 652                 http_encoding_inflate_stream_dtor(*s);
 653                 if (*s) {
 654                         pefree(*s, (*s)->flags & HTTP_ENCODING_STREAM_PERSISTENT);
 655                 }
 656                 *s = NULL;
 657         }
 658 }
 659 /* }}} */
 660
 661 /* {{{ void http_ob_deflatehandler(char *, uint, char **, uint *, int) */
 662 void _http_ob_deflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 663 {
 664         int encoding;
 665
 666         *handled_output = NULL;
 667         *handled_output_len = 0;
 668
 669         if (mode & PHP_OUTPUT_HANDLER_START) {
 670                 int flags;
 671
 672                 if (HTTP_G->send.deflate.stream) {
 673                         zend_error(E_ERROR, "ob_deflatehandler() can only be used once");
 674                         return;
 675                 }
 676
 677                 HTTP_G->send.deflate.response = 1;
 678                 encoding = http_encoding_response_start(0, 1);
 679                 HTTP_G->send.deflate.response = 0;
 680
 681                 switch (encoding) {
 682                         case HTTP_ENCODING_GZIP:
 683                                 flags = HTTP_DEFLATE_TYPE_GZIP;
 684                                 break;
 685
 686                         case HTTP_ENCODING_DEFLATE:
 687                                 flags = HTTP_DEFLATE_TYPE_ZLIB;
 688                                 break;
 689
 690                         default:
 691                                 goto deflate_passthru_plain;
 692                 }
 693
 694                 flags |= (HTTP_G->send.deflate.start_flags &~ 0xf0);
 695                 HTTP_G->send.deflate.stream = http_encoding_deflate_stream_init(NULL, flags);
 696         }
 697
 698         if (HTTP_G->send.deflate.stream) {
 699                 if (output_len) {
 700                         size_t tmp_len;
 701
 702                         http_encoding_deflate_stream_update((http_encoding_stream *) HTTP_G->send.deflate.stream, output, output_len, handled_output, &tmp_len);
 703                         *handled_output_len = tmp_len;
 704                 }
 705
 706                 if (mode & PHP_OUTPUT_HANDLER_END) {
 707                         char *remaining = NULL;
 708                         size_t remaining_len = 0;
 709
 710                         http_encoding_deflate_stream_finish((http_encoding_stream *) HTTP_G->send.deflate.stream, &remaining, &remaining_len);
 711                         http_encoding_deflate_stream_free((http_encoding_stream **) &HTTP_G->send.deflate.stream);
 712                         if (remaining) {
 713                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 714                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 715                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 716                                 efree(remaining);
 717                         }
 718                 }
 719         } else {
 720 deflate_passthru_plain:
 721                 *handled_output = estrndup(output, *handled_output_len = output_len);
 722         }
 723 }
 724 /* }}} */
 725
 726 /* {{{ void http_ob_inflatehandler(char *, uint, char **, uint *, int) */
 727 void _http_ob_inflatehandler(char *output, uint output_len, char **handled_output, uint *handled_output_len, int mode TSRMLS_DC)
 728 {
 729         *handled_output = NULL;
 730         *handled_output_len = 0;
 731
 732         if (mode & PHP_OUTPUT_HANDLER_START) {
 733                 if (HTTP_G->send.inflate.stream) {
 734                         zend_error(E_ERROR, "ob_inflatehandler() can only be used once");
 735                         return;
 736                 }
 737                 HTTP_G->send.inflate.stream = http_encoding_inflate_stream_init(NULL, (HTTP_G->send.inflate.start_flags &~ 0xf0));
 738         }
 739
 740         if (HTTP_G->send.inflate.stream) {
 741                 if (output_len) {
 742                         size_t tmp_len;
 743
 744                         http_encoding_inflate_stream_update((http_encoding_stream *) HTTP_G->send.inflate.stream, output, output_len, handled_output, &tmp_len);
 745                         *handled_output_len = tmp_len;
 746                 }
 747
 748                 if (mode & PHP_OUTPUT_HANDLER_END) {
 749                         char *remaining = NULL;
 750                         size_t remaining_len = 0;
 751
 752                         http_encoding_inflate_stream_finish((http_encoding_stream *) HTTP_G->send.inflate.stream, &remaining, &remaining_len);
 753                         http_encoding_inflate_stream_free((http_encoding_stream **) &HTTP_G->send.inflate.stream);
 754                         if (remaining) {
 755                                 *handled_output = erealloc(*handled_output, *handled_output_len + remaining_len + 1);
 756                                 memcpy(*handled_output + *handled_output_len, remaining, remaining_len);
 757                                 (*handled_output)[*handled_output_len += remaining_len] = '\0';
 758                                 efree(remaining);
 759                         }
 760                 }
 761         } else {
 762                 *handled_output = estrndup(output, *handled_output_len = output_len);
 763         }
 764 }
 765 /* }}} */
 766
 767 #endif /* HTTP_HAVE_ZLIB */
 768
 769 /*
 770  * Local variables:
 771  * tab-width: 4
 772  * c-basic-offset: 4
 773  * End:
 774  * vim600: noet sw=4 ts=4 fdm=marker
 775  * vim<600: noet sw=4 ts=4
 776  */
 777