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