+/*
+ +----------------------------------------------------------------------+
+ | PECL :: http |
+ +----------------------------------------------------------------------+
+ | This source file is subject to version 3.0 of the PHP license, that |
+ | is bundled with this package in the file LICENSE, and is available |
+ | through the world-wide-web at http://www.php.net/license/3_0.txt. |
+ | If you did not receive a copy of the PHP license and are unable to |
+ | obtain it through the world-wide-web, please send a note to |
+ | license@php.net so we can mail you a copy immediately. |
+ +----------------------------------------------------------------------+
+ | Copyright (c) 2004-2005 Michael Wallner <mike@php.net> |
+ +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+#include "php.h"
+
+#include "php_http_encoding_api.h"
+#include "php_http.h"
+#include "php_http_api.h"
+
+#ifdef HTTP_HAVE_ZLIB
+#include <zlib.h>
+
+#define HTTP_GZMAXTRY 10
+#define HTTP_GZBUFLEN(l) (l + (l / 1000) + 16 + 1)
+
+ZEND_EXTERN_MODULE_GLOBALS(http);
+
+static const char http_gzencode_header[] = {
+ (const char) 0x1f,
+ (const char) 0x8b,
+ (const char) Z_DEFLATED,
+ 0, 0, 0, 0, 0, 0,
+ (const char) 0x03
+};
+
+inline void http_init_gzencode_buffer(z_stream *Z, const char *data, size_t data_len, char **buf_ptr)
+{
+ Z->zalloc = Z_NULL;
+ Z->zfree = Z_NULL;
+ Z->opaque = Z_NULL;
+
+ Z->next_in = (Bytef *) data;
+ Z->avail_in = data_len;
+ Z->avail_out = HTTP_GZBUFLEN(data_len) - 1;
+
+ *buf_ptr = emalloc(Z->avail_out + sizeof(http_gzencode_header));
+ memcpy(*buf_ptr, http_gzencode_header, sizeof(http_gzencode_header));
+
+ Z->next_out = *buf_ptr + sizeof(http_gzencode_header);
+}
+
+inline void http_init_deflate_buffer(z_stream *Z, const char *data, size_t data_len, char **buf_ptr)
+{
+ Z->zalloc = Z_NULL;
+ Z->zfree = Z_NULL;
+ Z->opaque = Z_NULL;
+
+ Z->data_type = Z_ASCII;
+ Z->next_in = (Bytef *) data;
+ Z->avail_in = data_len;
+ Z->avail_out = HTTP_GZBUFLEN(data_len) - 1;
+ Z->next_out = emalloc(Z->avail_out);
+
+ *buf_ptr = Z->next_out;
+}
+
+inline void http_init_inflate_buffer(z_stream *Z, const char *data, size_t data_len, char **buf_ptr, size_t *buf_len, int iteration)
+{
+ Z->zalloc = Z_NULL;
+ Z->zfree = Z_NULL;
+
+ if (!iteration) {
+ *buf_len = data_len * 2;
+ *buf_ptr = emalloc(*buf_len + 1);
+ } else {
+ *buf_len <<= 2;
+ *buf_ptr = erealloc(*buf_ptr, *buf_len + 1);
+ }
+
+ Z->next_in = (Bytef *) data;
+ Z->avail_in = data_len;
+ Z->avail_out = *buf_len;
+ Z->next_out = *buf_ptr;
+}
+
+inline size_t http_finish_buffer(size_t buf_len, char **buf_ptr)
+{
+ (*buf_ptr)[buf_len] = '\0';
+ return buf_len;
+}
+
+inline size_t http_finish_gzencode_buffer(z_stream *Z, const char *data, size_t data_len, char **buf_ptr)
+{
+ unsigned long crc;
+ char *trailer;
+
+ crc = crc32(0L, Z_NULL, 0);
+ crc = crc32(crc, (const Bytef *) data, data_len);
+
+ trailer = *buf_ptr + sizeof(http_gzencode_header) + Z->total_out;
+
+ /* write crc & stream.total_in in LSB order */
+ trailer[0] = (char) crc & 0xFF;
+ trailer[1] = (char) (crc >> 8) & 0xFF;
+ trailer[2] = (char) (crc >> 16) & 0xFF;
+ trailer[3] = (char) (crc >> 24) & 0xFF;
+ trailer[4] = (char) (Z->total_in) & 0xFF;
+ trailer[5] = (char) (Z->total_in >> 8) & 0xFF;
+ trailer[6] = (char) (Z->total_in >> 16) & 0xFF;
+ trailer[7] = (char) (Z->total_in >> 24) & 0xFF;
+
+ return http_finish_buffer(Z->total_out + sizeof(http_gzencode_header) + 8, buf_ptr);
+}
+
+
+PHP_HTTP_API STATUS _http_encoding_gzencode(int level, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
+{
+ z_stream Z;
+ STATUS status = Z_OK;
+
+ http_init_gzencode_buffer(&Z, data, data_len, encoded);
+
+ if ( (Z_OK == (status = deflateInit2(&Z, level, Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) &&
+ (Z_STREAM_END == (status = deflate(&Z, Z_FINISH))) &&
+ (Z_OK == (status = deflateEnd(&Z)))) {
+ *encoded_len = http_finish_gzencode_buffer(&Z, data, data_len, encoded);
+ return SUCCESS;
+ }
+
+ efree(*encoded);
+ http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not gzencode data: %s", zError(status));
+ return FAILURE;
+}
+
+PHP_HTTP_API STATUS _http_encoding_deflate(int level, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
+{
+ z_stream Z;
+ STATUS status = Z_OK;
+
+ http_init_deflate_buffer(&Z, data, data_len, encoded);
+
+ if ( (Z_OK == (status = deflateInit2(&Z, level, Z_DEFLATED, -MAX_WBITS, MAX_MEM_LEVEL, Z_DEFAULT_STRATEGY))) &&
+ (Z_STREAM_END == (status = deflate(&Z, Z_FINISH))) &&
+ (Z_OK == (status = deflateEnd(&Z)))) {
+ *encoded_len = http_finish_buffer(Z.total_out, encoded);
+ return SUCCESS;
+ }
+
+ efree(encoded);
+ http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not deflate data: %s", zError(status));
+ return FAILURE;
+}
+
+PHP_HTTP_API STATUS _http_encoding_compress(int level, const char *data, size_t data_len, char **encoded, size_t *encoded_len TSRMLS_DC)
+{
+ STATUS status;
+
+ *encoded = emalloc(*encoded_len = HTTP_GZBUFLEN(data_len));
+
+ if (Z_OK == (status = compress2(*encoded, encoded_len, data, data_len, level))) {
+ http_finish_buffer(*encoded_len, encoded);
+ return SUCCESS;
+ }
+
+ efree(encoded);
+ http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not compress data: %s", zError(status));
+ return FAILURE;
+}
+
+PHP_HTTP_API STATUS _http_encoding_gzdecode(const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC)
+{
+ const char *encoded = data + sizeof(http_gzencode_header);
+ size_t encoded_len;
+
+ if (data_len <= sizeof(http_gzencode_header) + 8) {
+ http_error(HE_WARNING, HTTP_E_ENCODING, "Could not gzdecode data: too short data length");
+ } else {
+ encoded_len = data_len - sizeof(http_gzencode_header) - 8;
+
+ if (SUCCESS == http_encoding_inflate(encoded, encoded_len, decoded, decoded_len)) {
+ unsigned long len = 0, cmp = 0, crc = crc32(0L, Z_NULL, 0);
+
+ crc = crc32(crc, *decoded, *decoded_len);
+
+ cmp = (unsigned) (data[data_len-8]);
+ cmp += (unsigned) (data[data_len-7] << 8);
+ cmp += (unsigned) (data[data_len-6] << 16);
+ cmp += (unsigned) (data[data_len-5] << 24);
+ len = (unsigned) (data[data_len-4]);
+ len += (unsigned) (data[data_len-4] << 8);
+ len += (unsigned) (data[data_len-4] << 16);
+ len += (unsigned) (data[data_len-4] << 24);
+
+ if (cmp != crc) {
+ http_error(HE_NOTICE, HTTP_E_ENCODING, "Could not verify data integrity: CRC check failed");
+ }
+ if (len != *decoded_len) {
+ http_error(HE_NOTICE, HTTP_E_ENCODING, "Could not verify data integrity: data length check failed");
+ }
+
+ return SUCCESS;
+ }
+ }
+ return FAILURE;
+}
+
+PHP_HTTP_API STATUS _http_encoding_inflate(const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC)
+{
+ int max = 0;
+ STATUS status;
+ z_stream Z;
+
+ do {
+ http_init_inflate_buffer(&Z, data, data_len, decoded, decoded_len, max++);
+ if (Z_OK == (status = inflateInit2(&Z, -MAX_WBITS))) {
+ if (Z_STREAM_END == (status = inflate(&Z, Z_FINISH))) {
+ if (Z_OK == (status = inflateEnd(&Z))) {
+ *decoded_len = http_finish_buffer(Z.total_out, decoded);
+ return SUCCESS;
+ }
+ }
+ }
+ } while (max < HTTP_GZMAXTRY);
+
+ http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not inflate data: %s", zError(status));
+ return FAILURE;
+}
+
+PHP_HTTP_API STATUS _http_encoding_uncompress(const char *data, size_t data_len, char **decoded, size_t *decoded_len TSRMLS_DC)
+{
+ int max = 0;
+ STATUS status;
+ size_t want = data_len * 2;
+
+ *decoded = emalloc(want + 1);
+ if (Z_BUF_ERROR == (status = uncompress(*decoded, &want, data, data_len))) do {
+ /* this is a lot faster with large data than gzuncompress(),
+ but could be a problem with a low memory limit */
+ want <<= 2;
+ *decoded = erealloc(*decoded, want + 1);
+ status = uncompress(*decoded, &want, data, data_len);
+ } while (++max < HTTP_GZMAXTRY && status == Z_BUF_ERROR);
+
+ if (Z_OK == status) {
+ *decoded_len = http_finish_buffer(want, decoded);
+ return SUCCESS;
+ }
+
+ efree(*decoded);
+ http_error_ex(HE_WARNING, HTTP_E_ENCODING, "Could not uncompress data: %s", zError(status));
+ return FAILURE;
+}
+
+#endif /* HTTP_HAVE_ZLIB */
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: noet sw=4 ts=4 fdm=marker
+ * vim<600: noet sw=4 ts=4
+ */
+
projects / m6w6 / ext-http / commitdiff
