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