- get rid of 1001 strict-aliasing warnings
[m6w6/ext-http] / http_send_api.c
index 52e2b83f59883fa718e904155d0c7748c96f7279..93271dbd68ac407689eb09bd9b3f50881ddae0a9 100644 (file)
 /*
-   +----------------------------------------------------------------------+
-   | 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>               |
-   +----------------------------------------------------------------------+
+    +--------------------------------------------------------------------+
+    | PECL :: http                                                       |
+    +--------------------------------------------------------------------+
+    | Redistribution and use in source and binary forms, with or without |
+    | modification, are permitted provided that the conditions mentioned |
+    | in the accompanying LICENSE file are met.                          |
+    +--------------------------------------------------------------------+
+    | Copyright (c) 2004-2006, Michael Wallner <mike@php.net>            |
+    +--------------------------------------------------------------------+
 */
 
 /* $Id$ */
 
-#ifdef HAVE_CONFIG_H
-#      include "config.h"
-#endif
+#define HTTP_WANT_SAPI
+#define HTTP_WANT_ZLIB
+#define HTTP_WANT_MAGIC
+#include "php_http.h"
 
-#include "php.h"
 #include "php_streams.h"
 #include "ext/standard/php_lcg.h"
-#include "SAPI.h"
 
-#include "php_http.h"
-#include "php_http_std_defs.h"
 #include "php_http_api.h"
-#include "php_http_send_api.h"
-#include "php_http_headers_api.h"
-#include "php_http_date_api.h"
 #include "php_http_cache_api.h"
+#include "php_http_date_api.h"
+#include "php_http_encoding_api.h"
+#include "php_http_headers_api.h"
+#include "php_http_send_api.h"
 
-ZEND_EXTERN_MODULE_GLOBALS(http);
+#define http_flush(d, l) _http_flush(NULL, (d), (l) TSRMLS_CC)
+/* {{{ static inline void http_flush() */
+static inline void _http_flush(void *nothing, const char *data, size_t data_len TSRMLS_DC)
+{
+       PHPWRITE(data, data_len);
+       php_end_ob_buffer(1, 1 TSRMLS_CC);
+       sapi_flush(TSRMLS_C);
+       
+#define HTTP_MSEC(s) (s * 1000)
+#define HTTP_USEC(s) (HTTP_MSEC(s) * 1000)
+#define HTTP_NSEC(s) (HTTP_USEC(s) * 1000)
+#define HTTP_NANOSEC (1000 * 1000 * 1000)
+#define HTTP_DIFFSEC (0.001)
+
+       if (HTTP_G->send.throttle_delay >= HTTP_DIFFSEC) {
+#if defined(PHP_WIN32)
+               Sleep((DWORD) HTTP_MSEC(HTTP_G->send.throttle_delay));
+#elif defined(HAVE_USLEEP)
+               usleep(HTTP_USEC(HTTP_G->send.throttle_delay));
+#elif defined(HAVE_NANOSLEEP)
+               struct timespec req, rem;
+
+               req.tv_sec = (time_t) HTTP_G->send.throttle_delay;
+               req.tv_nsec = HTTP_NSEC(HTTP_G->send.throttle_delay) % HTTP_NANOSEC;
+
+               while (nanosleep(&req, &rem) && (errno == EINTR) && (HTTP_NSEC(rem.tv_sec) + rem.tv_nsec) > HTTP_NSEC(HTTP_DIFFSEC))) {
+                       req.tv_sec = rem.tv_sec;
+                       req.tv_nsec = rem.tv_nsec;
+               }
+#endif
+       }
+}
+/* }}} */
 
-#define http_send_chunk(d, b, e, m) _http_send_chunk((d), (b), (e), (m) TSRMLS_CC)
-/* {{{ static STATUS http_send_chunk(const void *, size_t, size_t, http_send_mode) */
-static STATUS _http_send_chunk(const void *data, size_t begin, size_t end, http_send_mode mode TSRMLS_DC)
+/* {{{ http_send_response_start */
+#define http_send_response_start(b, cl) _http_send_response_start((b), (cl) TSRMLS_CC)
+static inline void _http_send_response_start(void **buffer, size_t content_length TSRMLS_DC)
 {
-       long len = end - begin;
+       int encoding;
+       
+       if ((encoding = http_encoding_response_start(content_length))) {
+#ifdef HTTP_HAVE_ZLIB
+               *buffer = http_encoding_deflate_stream_init(NULL, 
+                       (encoding == HTTP_ENCODING_GZIP) ? 
+                               HTTP_DEFLATE_TYPE_GZIP : HTTP_DEFLATE_TYPE_ZLIB);
+#endif
+       }
+}
+/* }}} */
 
+/* {{{ http_send_response_data_plain */
+#define http_send_response_data_plain(b, d, dl) _http_send_response_data_plain((b), (d), (dl) TSRMLS_CC)
+static inline void _http_send_response_data_plain(void **buffer, const char *data, size_t data_len TSRMLS_DC)
+{
+       if (HTTP_G->send.deflate.encoding) {
+#ifdef HTTP_HAVE_ZLIB
+               char *encoded;
+               size_t encoded_len;
+               http_encoding_stream *s = *((http_encoding_stream **) buffer);
+               
+               http_encoding_deflate_stream_update(s, data, data_len, &encoded, &encoded_len);
+               phpstr_chunked_output((phpstr **) &s->storage, encoded, encoded_len, HTTP_G->send.buffer_size, _http_flush, NULL TSRMLS_CC);
+               efree(encoded);
+#else
+               http_error(HE_ERROR, HTTP_E_RESPONSE, "Attempt to send GZIP response despite being able to do so; please report this bug");
+#endif
+       } else {
+               phpstr_chunked_output((phpstr **) buffer, data, data_len, HTTP_G->send.buffer_size, _http_flush, NULL TSRMLS_CC);
+       }
+}
+/* }}} */
+
+/* {{{ http_send_response_data_fetch */
+#define http_send_response_data_fetch(b, d, l, m, s, e) _http_send_response_data_fetch((b), (d), (l), (m), (s), (e) TSRMLS_CC)
+static inline void _http_send_response_data_fetch(void **buffer, const void *data, size_t data_len, http_send_mode mode, size_t begin, size_t end TSRMLS_DC)
+{
+       char *buf;
+       long got, len = end - begin;
+       
        switch (mode)
        {
                case SEND_RSRC:
                {
-                       char *buf;
-                       size_t read = 0;
                        php_stream *s = (php_stream *) data;
 
-                       if (php_stream_seek(s, begin, SEEK_SET)) {
-                               return FAILURE;
-                       }
-
-                       buf = (char *) ecalloc(1, HTTP_SENDBUF_SIZE);
-                       /* read into buf and write out */
-                       while ((len -= HTTP_SENDBUF_SIZE) >= 0) {
-                               if (!(read = php_stream_read(s, buf, HTTP_SENDBUF_SIZE))) {
-                                       efree(buf);
-                                       return FAILURE;
-                               }
-                               if (read - php_body_write(buf, read TSRMLS_CC)) {
-                                       efree(buf);
-                                       return FAILURE;
-                               }
-                               /* ob_flush() && flush() */
-                               php_end_ob_buffer(1, 1 TSRMLS_CC);
-                               sapi_flush(TSRMLS_C);
-                       }
-
-                       /* read & write left over */
-                       if (len) {
-                               if (read = php_stream_read(s, buf, HTTP_SENDBUF_SIZE + len)) {
-                                       if (read - php_body_write(buf, read TSRMLS_CC)) {
-                                               efree(buf);
-                                               return FAILURE;
-                                       }
-                               } else {
-                                       efree(buf);
-                                       return FAILURE;
+                       if (SUCCESS == php_stream_seek(s, begin, SEEK_SET)) {
+                               buf = emalloc(HTTP_SENDBUF_SIZE);
+                               
+                               while (len > 0) {
+                                       got = php_stream_read(s, buf, MIN(len, HTTP_SENDBUF_SIZE));
+                                       http_send_response_data_plain(buffer, buf, got);
+                                       len -= got;
                                }
-                               /* ob_flush() & flush() */
-                               php_end_ob_buffer(1, 1 TSRMLS_CC);
-                               sapi_flush(TSRMLS_C);
+                               
+                               efree(buf);
                        }
-                       efree(buf);
-                       return SUCCESS;
                }
+               break;
 
                case SEND_DATA:
                {
-                       char *s = (char *) data + begin;
-
-                       while ((len -= HTTP_SENDBUF_SIZE) >= 0) {
-                               if (HTTP_SENDBUF_SIZE - php_body_write(s, HTTP_SENDBUF_SIZE TSRMLS_CC)) {
-                                       return FAILURE;
-                               }
-                               s += HTTP_SENDBUF_SIZE;
-                               /* ob_flush() & flush() */
-                               php_end_ob_buffer(1, 1 TSRMLS_CC);
-                               sapi_flush(TSRMLS_C);
-                       }
-
-                       /* write left over */
-                       if (len) {
-                               if (HTTP_SENDBUF_SIZE + len - php_body_write(s, HTTP_SENDBUF_SIZE + len TSRMLS_CC)) {
-                                               return FAILURE;
-                               }
-                               /* ob_flush() & flush() */
-                               php_end_ob_buffer(1, 1 TSRMLS_CC);
-                               sapi_flush(TSRMLS_C);
+                       buf = (char *) data + begin;
+                       
+                       while (len > 0) {
+                               got = MIN(len, HTTP_SENDBUF_SIZE);
+                               http_send_response_data_plain(buffer, buf, got);
+                               len -= got;
+                               buf += got;
                        }
-                       return SUCCESS;
                }
-
-               default:
-                       return FAILURE;
                break;
+
+               EMPTY_SWITCH_DEFAULT_CASE();
        }
 }
 /* }}} */
 
+/* {{{ http_send_response_finish */
+#define http_send_response_finish(b) _http_send_response_finish((b) TSRMLS_CC)
+static inline void _http_send_response_finish(void **buffer TSRMLS_DC)
+{
+       if (HTTP_G->send.deflate.encoding) {
+#ifdef HTTP_HAVE_ZLIB
+               char *encoded = NULL;
+               size_t encoded_len = 0;
+               http_encoding_stream *s = *((http_encoding_stream **) buffer);
+               
+               http_encoding_deflate_stream_finish(s, &encoded, &encoded_len);
+               phpstr_chunked_output((phpstr **) &s->storage, encoded, encoded_len, 0, _http_flush, NULL TSRMLS_CC);
+               http_encoding_deflate_stream_free(&s);
+               STR_FREE(encoded);
+#else
+               http_error(HE_ERROR, HTTP_E_RESPONSE, "Attempt to send GZIP response despite being able to do so; please report this bug");
+#endif
+       } else {
+               phpstr_chunked_output((phpstr **) buffer, NULL, 0, 0, _http_flush, NULL TSRMLS_CC);
+       }
+}
+/* }}} */
+
+/* {{{ */
+PHP_MINIT_FUNCTION(http_send)
+{
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT", HTTP_REDIRECT);
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT_PERM", HTTP_REDIRECT_PERM);
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT_FOUND", HTTP_REDIRECT_FOUND);
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT_POST", HTTP_REDIRECT_POST);
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT_PROXY", HTTP_REDIRECT_PROXY);
+       HTTP_LONG_CONSTANT("HTTP_REDIRECT_TEMP", HTTP_REDIRECT_TEMP);
+       
+       return SUCCESS;
+}
+/* }}} */
+
+
+/* {{{ STATUS http_send_header(char *, char *, zend_bool) */
+PHP_HTTP_API STATUS _http_send_header_ex(const char *name, size_t name_len, const char *value, size_t value_len, zend_bool replace, char **sent_header TSRMLS_DC)
+{
+       STATUS ret;
+       size_t header_len = sizeof(": ") + name_len + value_len + 1;
+       char *header = emalloc(header_len + 1);
+
+       header[header_len] = '\0';
+       header_len = snprintf(header, header_len, "%s: %s", name, value);
+       ret = http_send_header_string_ex(header, header_len, replace);
+       if (sent_header) {
+               *sent_header = header;
+       } else {
+               efree(header);
+       }
+       return ret;
+}
+/* }}} */
 
 /* {{{ STATUS http_send_status_header(int, char *) */
-PHP_HTTP_API STATUS _http_send_status_header(int status, const char *header TSRMLS_DC)
+PHP_HTTP_API STATUS _http_send_status_header_ex(int status, const char *header, size_t header_len, zend_bool replace TSRMLS_DC)
 {
        STATUS ret;
-       sapi_header_line h = {(char *) header, strlen(header), status};
-       if (SUCCESS != (ret = sapi_header_op(SAPI_HEADER_REPLACE, &h TSRMLS_CC))) {
-               http_error_ex(E_WARNING, HTTP_E_HEADER, "Could not send header: %s (%d)", header, status);
+       sapi_header_line h = {(char *) header, header_len, status};
+       if (SUCCESS != (ret = sapi_header_op(replace ? SAPI_HEADER_REPLACE : SAPI_HEADER_ADD, &h TSRMLS_CC))) {
+               http_error_ex(HE_WARNING, HTTP_E_HEADER, "Could not send header: %s (%d)", header, status);
        }
        return ret;
 }
 /* }}} */
 
 /* {{{ STATUS http_send_last_modified(int) */
-PHP_HTTP_API STATUS _http_send_last_modified(time_t t TSRMLS_DC)
+PHP_HTTP_API STATUS _http_send_last_modified_ex(time_t t, char **sent_header TSRMLS_DC)
 {
-       char *date = NULL;
-       if (date = http_date(t)) {
-               char modified[96] = "Last-Modified: ";
-               strcat(modified, date);
-               efree(date);
-
-               /* remember */
-               HTTP_G(lmod) = t;
+       STATUS ret;
+       char *date = http_date(t);
 
-               return http_send_header(modified);
+       if (!date) {
+               return FAILURE;
        }
-       return FAILURE;
+
+       ret = http_send_header_ex("Last-Modified", lenof("Last-Modified"), date, strlen(date), 1, sent_header);
+       efree(date);
+
+       /* remember */
+       HTTP_G->send.last_modified = t;
+
+       return ret;
 }
 /* }}} */
 
 /* {{{ STATUS http_send_etag(char *, size_t) */
-PHP_HTTP_API STATUS _http_send_etag(const char *etag, size_t etag_len TSRMLS_DC)
+PHP_HTTP_API STATUS _http_send_etag_ex(const char *etag, size_t etag_len, char **sent_header TSRMLS_DC)
 {
        STATUS status;
        char *etag_header;
+       size_t etag_header_len;
 
        if (!etag_len){
-               http_error_ex(E_WARNING, HTTP_E_HEADER, "Attempt to send empty ETag (previous: %s)\n", HTTP_G(etag));
+               http_error_ex(HE_WARNING, HTTP_E_HEADER, "Attempt to send empty ETag (previous: %s)\n", HTTP_G->send.unquoted_etag);
                return FAILURE;
        }
 
+       etag_header_len = spprintf(&etag_header, 0, "ETag: \"%s\"", etag);
+       status = http_send_header_string_ex(etag_header, etag_header_len, 1);
+       
        /* remember */
-       if (HTTP_G(etag)) {
-               efree(HTTP_G(etag));
-       }
-       HTTP_G(etag) = estrdup(etag);
-
-       etag_header = ecalloc(1, sizeof("ETag: \"\"") + etag_len);
-       sprintf(etag_header, "ETag: \"%s\"", etag);
-       status = http_send_header(etag_header);
-       efree(etag_header);
-       return status;
-}
-/* }}} */
-
-/* {{{ STATUS http_send_cache_control(char *, size_t) */
-PHP_HTTP_API STATUS _http_send_cache_control(const char *cache_control, size_t cc_len TSRMLS_DC)
-{
-       STATUS status;
-       char *cc_header = ecalloc(1, sizeof("Cache-Control: ") + cc_len);
+       STR_SET(HTTP_G->send.unquoted_etag, estrndup(etag, etag_len));
 
-       sprintf(cc_header, "Cache-Control: %s", cache_control);
-       status = http_send_header(cc_header);
-       efree(cc_header);
+       if (sent_header) {
+               *sent_header = etag_header;
+       } else {
+               efree(etag_header);
+       }
+       
        return status;
 }
 /* }}} */
@@ -192,25 +264,13 @@ PHP_HTTP_API STATUS _http_send_cache_control(const char *cache_control, size_t c
 /* {{{ STATUS http_send_content_type(char *, size_t) */
 PHP_HTTP_API STATUS _http_send_content_type(const char *content_type, size_t ct_len TSRMLS_DC)
 {
-       STATUS status;
-       char *ct_header;
-
-       if (!strchr(content_type, '/')) {
-               http_error_ex(E_WARNING, HTTP_E_PARAM, "Content-Type '%s' doesn't seem to consist of a primary and a secondary part", content_type);
-               return FAILURE;
-       }
+       HTTP_CHECK_CONTENT_TYPE(content_type, return FAILURE);
 
        /* remember for multiple ranges */
-       if (HTTP_G(ctype)) {
-               efree(HTTP_G(ctype));
-       }
-       HTTP_G(ctype) = estrndup(content_type, ct_len);
+       STR_FREE(HTTP_G->send.content_type);
+       HTTP_G->send.content_type = estrndup(content_type, ct_len);
 
-       ct_header = ecalloc(1, sizeof("Content-Type: ") + ct_len);
-       sprintf(ct_header, "Content-Type: %s", content_type);
-       status = http_send_header(ct_header);
-       efree(ct_header);
-       return status;
+       return http_send_header_ex("Content-Type", lenof("Content-Type"), content_type, ct_len, 1, NULL);
 }
 /* }}} */
 
@@ -228,165 +288,179 @@ PHP_HTTP_API STATUS _http_send_content_disposition(const char *filename, size_t
                sprintf(cd_header, "Content-Disposition: attachment; filename=\"%s\"", filename);
        }
 
-       status = http_send_header(cd_header);
+       status = http_send_header_string(cd_header);
        efree(cd_header);
        return status;
 }
 /* }}} */
 
-/* {{{ STATUS http_send_ranges(HashTable *, void *, size_t, http_send_mode) */
-PHP_HTTP_API STATUS _http_send_ranges(HashTable *ranges, const void *data, size_t size, http_send_mode mode TSRMLS_DC)
-{
-       long **begin, **end;
-       zval **zrange;
-
-       /* single range */
-       if (zend_hash_num_elements(ranges) == 1) {
-               char range_header[256] = {0};
-
-               if (SUCCESS != zend_hash_index_find(ranges, 0, (void **) &zrange) ||
-                       SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(zrange), 0, (void **) &begin) ||
-                       SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(zrange), 1, (void **) &end)) {
-                       return FAILURE;
-               }
-
-               /* Send HTTP 206 Partial Content */
-               http_send_status(206);
-
-               /* send content range header */
-               snprintf(range_header, 255, "Content-Range: bytes %d-%d/%d", **begin, **end, size);
-               http_send_header(range_header);
-
-               /* send requested chunk */
-               return http_send_chunk(data, **begin, **end + 1, mode);
-       }
-
-       /* multi range */
-       else {
-               char bound[23] = {0}, preface[1024] = {0},
-                       multi_header[68] = "Content-Type: multipart/byteranges; boundary=";
-
-               /* Send HTTP 206 Partial Content */
-               http_send_status(206);
-
-               /* send multipart/byteranges header */
-               snprintf(bound, 22, "--%d%0.9f", time(NULL), php_combined_lcg(TSRMLS_C));
-               strncat(multi_header, bound + 2, 21);
-               http_send_header(multi_header);
-
-               /* send each requested chunk */
-               FOREACH_HASH_VAL(ranges, zrange) {
-                       if (SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(zrange), 0, (void **) &begin) ||
-                               SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(zrange), 1, (void **) &end)) {
-                               break;
-                       }
-
-                       snprintf(preface, 1023,
-                               HTTP_CRLF "%s"
-                               HTTP_CRLF "Content-Type: %s"
-                               HTTP_CRLF "Content-Range: bytes %ld-%ld/%ld"
-                               HTTP_CRLF
-                               HTTP_CRLF,
-
-                               bound,
-                               HTTP_G(ctype) ? HTTP_G(ctype) : "application/x-octetstream",
-                               **begin,
-                               **end,
-                               size
-                       );
-
-                       php_body_write(preface, strlen(preface) TSRMLS_CC);
-                       http_send_chunk(data, **begin, **end + 1, mode);
-               }
-
-               /* write boundary once more */
-               php_body_write(HTTP_CRLF, sizeof(HTTP_CRLF) - 1 TSRMLS_CC);
-               php_body_write(bound, strlen(bound) TSRMLS_CC);
-               php_body_write("--", 2 TSRMLS_CC);
-
-               return SUCCESS;
-       }
-}
-/* }}} */
-
 /* {{{ STATUS http_send(void *, size_t, http_send_mode) */
-PHP_HTTP_API STATUS _http_send(const void *data_ptr, size_t data_size, http_send_mode data_mode TSRMLS_DC)
+PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_send_mode data_mode, zend_bool no_cache TSRMLS_DC)
 {
+       void *s = NULL;
        HashTable ranges;
        http_range_status range_status;
-       int cache_etag = 0;
-
+       
        if (!data_ptr) {
                return FAILURE;
        }
        if (!data_size) {
                return SUCCESS;
        }
-
-       /* stop on-the-fly etag generation */
-       if (cache_etag = HTTP_G(etag_started)) {
-               /* interrupt ob_etaghandler */
-               HTTP_G(etag_started) = 0;
-       }
+       
+       /* enable partial dl and resume */
+       http_send_header_string("Accept-Ranges: bytes");
 
        zend_hash_init(&ranges, 0, NULL, ZVAL_PTR_DTOR, 0);
        range_status = http_get_request_ranges(&ranges, data_size);
 
-       if (range_status == RANGE_ERR) {
-               zend_hash_destroy(&ranges);
-               http_send_status(416);
-               return FAILURE;
-       }
-
-       /* Range Request - only send ranges if entity hasn't changed */
-       if (    range_status == RANGE_OK &&
-                       http_match_etag_ex("HTTP_IF_MATCH", HTTP_G(etag), 0) &&
-                       http_match_last_modified_ex("HTTP_IF_UNMODIFIED_SINCE", HTTP_G(lmod), 0)) {
-               STATUS result = http_send_ranges(&ranges, data_ptr, data_size, data_mode);
-               zend_hash_destroy(&ranges);
-               return result;
-       }
-
-       zend_hash_destroy(&ranges);
-
-       /* send 304 Not Modified if etag matches */
-       if (cache_etag) {
-               char *etag = NULL;
-
-               if (!(etag = http_etag(data_ptr, data_size, data_mode))) {
+       switch (range_status)
+       {
+               case RANGE_ERR:
+               {
+                       zend_hash_destroy(&ranges);
+                       http_send_status(416);
                        return FAILURE;
                }
-               if (SUCCESS != http_send_etag(etag, 32)) {
-                       efree(etag);
-                       return FAILURE;
+               case RANGE_OK:
+               {
+                       /* Range Request - only send ranges if entity hasn't changed */
+                       if (    http_got_server_var("HTTP_IF_RANGE") &&
+                                       !http_match_etag("HTTP_IF_RANGE", HTTP_G->send.unquoted_etag) &&
+                                       !http_match_last_modified("HTTP_IF_RANGE", HTTP_G->send.last_modified)) {
+                               /* fallthrough to send full entity with 200 Ok */
+                               no_cache = 1;
+                       } else if (     !http_match_etag_ex("HTTP_IF_MATCH", HTTP_G->send.unquoted_etag, 0) ||
+                                               !http_match_last_modified_ex("HTTP_IF_UNMODIFIED_SINCE", HTTP_G->send.last_modified, 0) ||
+                                               !http_match_last_modified_ex("HTTP_UNLESS_MODIFIED_SINCE", HTTP_G->send.last_modified, 0)) {
+                               /* 412 Precondition failed */
+                               zend_hash_destroy(&ranges);
+                               http_send_status(412);
+                               return FAILURE;
+                       } else if (zend_hash_num_elements(&ranges) == 1) {
+                               /* single range */
+                               zval **range, **begin, **end;
+                               
+                               if (    SUCCESS != zend_hash_index_find(&ranges, 0, (void *) &range) ||
+                                               SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(range), 0, (void *) &begin) ||
+                                               SUCCESS != zend_hash_index_find(Z_ARRVAL_PP(range), 1, (void *) &end)) {
+                                       /* this should never happen */
+                                       zend_hash_destroy(&ranges);
+                                       http_send_status(500);
+                                       return FAILURE;
+                               } else {
+                                       char range_header_str[256];
+                                       size_t range_header_len;
+                                       
+                                       range_header_len = snprintf(range_header_str, lenof(range_header_str), "Content-Range: bytes %ld-%ld/%zu", Z_LVAL_PP(begin), Z_LVAL_PP(end), data_size);
+                                       http_send_status_header_ex(206, range_header_str, range_header_len, 1);
+                                       http_send_response_start(&s, Z_LVAL_PP(end)-Z_LVAL_PP(begin)+1);
+                                       http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, Z_LVAL_PP(begin), Z_LVAL_PP(end) + 1);
+                                       http_send_response_finish(&s);
+                                       zend_hash_destroy(&ranges);
+                                       return SUCCESS;
+                               }
+                       } else {
+                               /* multi range */
+                               HashPosition pos;
+                               zval **range, **begin, **end;
+                               const char *content_type = HTTP_G->send.content_type;
+                               char boundary_str[32], range_header_str[256];
+                               size_t boundary_len, range_header_len;
+                               
+                               boundary_len = snprintf(boundary_str, lenof(boundary_str), "%lu%0.9f", (ulong) HTTP_GET_REQUEST_TIME(), (float) php_combined_lcg(TSRMLS_C));
+                               range_header_len = snprintf(range_header_str, lenof(range_header_str), "Content-Type: multipart/byteranges; boundary=%s", boundary_str);
+                               
+                               http_send_status_header_ex(206, range_header_str, range_header_len, 1);
+                               http_send_response_start(&s, 0);
+                               
+                               if (!content_type) {
+                                       content_type = "application/x-octetstream";
+                               }
+                               
+                               FOREACH_HASH_VAL(pos, &ranges, range) {
+                                       if (    SUCCESS == zend_hash_index_find(Z_ARRVAL_PP(range), 0, (void *) &begin) &&
+                                                       SUCCESS == zend_hash_index_find(Z_ARRVAL_PP(range), 1, (void *) &end)) {
+                                               char preface_str[512];
+                                               size_t preface_len;
+
+#define HTTP_RANGE_PREFACE \
+       HTTP_CRLF "--%s" \
+       HTTP_CRLF "Content-Type: %s" \
+       HTTP_CRLF "Content-Range: bytes %ld-%ld/%zu" \
+       HTTP_CRLF HTTP_CRLF
+                                               
+                                               preface_len = snprintf(preface_str, lenof(preface_str), HTTP_RANGE_PREFACE, boundary_str, content_type, Z_LVAL_PP(begin), Z_LVAL_PP(end), data_size);
+                                               http_send_response_data_plain(&s, preface_str, preface_len);
+                                               http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, Z_LVAL_PP(begin), Z_LVAL_PP(end) + 1);
+                                       }
+                               }
+                               
+                               http_send_response_data_plain(&s, HTTP_CRLF "--", lenof(HTTP_CRLF "--"));
+                               http_send_response_data_plain(&s, boundary_str, boundary_len);
+                               http_send_response_data_plain(&s, "--", lenof("--"));
+                               
+                               http_send_response_finish(&s);
+                               zend_hash_destroy(&ranges);
+                               return SUCCESS;
+                       }
                }
-               if (http_match_etag("HTTP_IF_NONE_MATCH", etag)) {
-                       efree(etag);
-                       return http_cache_exit();
+               case RANGE_NO:
+               {
+                       zend_hash_destroy(&ranges);
+
+                       /* send 304 Not Modified if etag matches - DON'T return on ETag generation failure */
+                       if (!no_cache && (http_interrupt_ob_etaghandler() || (HTTP_G->send.unquoted_etag != NULL))) {
+                               char *etag = NULL;
+                               
+                               if (HTTP_G->send.unquoted_etag) {
+                                       etag = estrdup(HTTP_G->send.unquoted_etag);
+                               }
+                               
+                               if (etag || (etag = http_etag(data_ptr, data_size, data_mode))) {
+                                       char *sent_header = NULL;
+                                       
+                                       http_send_etag_ex(etag, strlen(etag), &sent_header);
+                                       if (http_match_etag("HTTP_IF_NONE_MATCH", etag)) {
+                                               return http_exit_ex(304, sent_header, NULL, 0);
+                                       } else {
+                                               STR_FREE(sent_header);
+                                               /* no caching for Last-Modified if ETags really don't match */
+                                               no_cache = http_got_server_var("HTTP_IF_NONE_MATCH");
+                                       }
+                                       efree(etag);
+                               }
+                       }
+               
+                       /* send 304 Not Modified if last modified matches */
+                       if (!no_cache && http_match_last_modified("HTTP_IF_MODIFIED_SINCE", HTTP_G->send.last_modified)) {
+                               char *sent_header = NULL;
+                               http_send_last_modified_ex(HTTP_G->send.last_modified, &sent_header);
+                               return http_exit_ex(304, sent_header, NULL, 0);
+                       }
+                       
+                       /* send full response */
+                       http_send_response_start(&s, data_size);
+                       http_send_response_data_fetch(&s, data_ptr, data_size, data_mode, 0, data_size);
+                       http_send_response_finish(&s);
+                       return SUCCESS;
                }
-               efree(etag);
        }
-
-       /* send 304 Not Modified if last modified matches */
-       if (http_match_last_modified("HTTP_IF_MODIFIED_SINCE", HTTP_G(lmod))) {
-               return http_cache_exit();
-       }
-
-       /* send full entity */
-       return http_send_chunk(data_ptr, 0, data_size, data_mode);
+       return FAILURE;
 }
 /* }}} */
 
 /* {{{ STATUS http_send_stream(php_stream *) */
-PHP_HTTP_API STATUS _http_send_stream_ex(php_stream *file, zend_bool close_stream TSRMLS_DC)
+PHP_HTTP_API STATUS _http_send_stream_ex(php_stream *file, zend_bool close_stream, zend_bool no_cache TSRMLS_DC)
 {
        STATUS status;
+       php_stream_statbuf ssb;
 
-       if ((!file) || php_stream_stat(file, &HTTP_G(ssb))) {
+       if ((!file) || php_stream_stat(file, &ssb)) {
                return FAILURE;
        }
 
-       status = http_send(file, HTTP_G(ssb).sb.st_size, SEND_RSRC);
+       status = http_send_ex(file, ssb.sb.st_size, SEND_RSRC, no_cache);
 
        if (close_stream) {
                php_stream_close(file);
@@ -396,6 +470,68 @@ PHP_HTTP_API STATUS _http_send_stream_ex(php_stream *file, zend_bool close_strea
 }
 /* }}} */
 
+/* {{{ char *http_guess_content_type(char *magic_file, long magic_mode, void *data, size_t size, http_send_mode mode) */
+PHP_HTTP_API char *_http_guess_content_type(const char *magicfile, long magicmode, void *data_ptr, size_t data_len, http_send_mode data_mode TSRMLS_DC)
+{
+       char *ct = NULL;
+
+#ifdef HTTP_HAVE_MAGIC
+       struct magic_set *magic;
+       
+       HTTP_CHECK_OPEN_BASEDIR(magicfile, return NULL);
+       
+       /*      magic_load() fails if MAGIC_MIME is set because it 
+               cowardly adds .mime to the file name */
+       magic = magic_open(magicmode &~ MAGIC_MIME);
+       
+       if (!magic) {
+               http_error_ex(HE_WARNING, HTTP_E_INVALID_PARAM, "Invalid magic mode: %ld", magicmode);
+       } else if (-1 == magic_load(magic, magicfile)) {
+               http_error_ex(HE_WARNING, HTTP_E_RUNTIME, "Failed to load magic database '%s' (%s)", magicfile, magic_error(magic));
+       } else {
+               const char *ctype = NULL;
+               
+               magic_setflags(magic, magicmode);
+               
+               switch (data_mode)
+               {
+                       case SEND_RSRC:
+                       {
+                               char *buffer;
+                               size_t b_len;
+                               
+                               b_len = php_stream_copy_to_mem(data_ptr, &buffer, 65536, 0);
+                               ctype = magic_buffer(magic, buffer, b_len);
+                               efree(buffer);
+                       }
+                       break;
+                       
+                       case SEND_DATA:
+                               ctype = magic_buffer(magic, data_ptr, data_len);
+                       break;
+                       
+                       default:
+                               HTTP_CHECK_OPEN_BASEDIR(data_ptr, magic_close(magic); return NULL);
+                               ctype = magic_file(magic, data_ptr);
+                       break;
+               }
+               
+               if (ctype) {
+                       ct = estrdup(ctype);
+               } else {
+                       http_error_ex(HE_WARNING, HTTP_E_RUNTIME, "Failed to guess Content-Type: %s", magic_error(magic));
+               }
+       }
+       if (magic) {
+               magic_close(magic);
+       }
+#else
+       http_error(HE_WARNING, HTTP_E_RUNTIME, "Cannot guess Content-Type; libmagic not available");
+#endif
+       
+       return ct;
+}
+/* }}} */
 
 /*
  * Local variables: