X-Git-Url: https://git.m6w6.name/?p=m6w6%2Fext-http;a=blobdiff_plain;f=http_send_api.c;h=93271dbd68ac407689eb09bd9b3f50881ddae0a9;hp=badfaf702c20e3c7820dc16b570951ed404ae741;hb=669d2e6a8bdc642b6b52693f4593f199ddd7e8d2;hpb=160400377eb70b98b216cd91aadf9243338d3fd5

diff --git a/http_send_api.c b/http_send_api.c
index badfaf7..93271db 100644
--- a/http_send_api.c
+++ b/http_send_api.c
@@ -6,36 +6,30 @@
     | modification, are permitted provided that the conditions mentioned |
     | in the accompanying LICENSE file are met.                          |
     +--------------------------------------------------------------------+
-    | Copyright (c) 2004-2005, Michael Wallner <mike@php.net>            |
+    | Copyright (c) 2004-2006, Michael Wallner <mike@php.net>            |
     +--------------------------------------------------------------------+
 */
 
 /* $Id$ */
 
-#ifdef HAVE_CONFIG_H
-#	include "config.h"
-#endif
-#include "php.h"
+#define HTTP_WANT_SAPI
+#define HTTP_WANT_ZLIB
+#define HTTP_WANT_MAGIC
+#include "php_http.h"
 
-#include "SAPI.h"
 #include "php_streams.h"
 #include "ext/standard/php_lcg.h"
 
-#include "php_http.h"
-#include "php_http_std_defs.h"
 #include "php_http_api.h"
-#include "php_http_date_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((d), (l) SRMLS_CC)
+#define http_flush(d, l) _http_flush(NULL, (d), (l) TSRMLS_CC)
 /* {{{ static inline void http_flush() */
-static inline void _http_flush(const char *data, size_t data_len TSRMLS_DC)
+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);
@@ -47,16 +41,16 @@ static inline void _http_flush(const char *data, size_t data_len TSRMLS_DC)
 #define HTTP_NANOSEC (1000 * 1000 * 1000)
 #define HTTP_DIFFSEC (0.001)
 
-	if (HTTP_G(send).throttle_delay >= HTTP_DIFFSEC) {
+	if (HTTP_G->send.throttle_delay >= HTTP_DIFFSEC) {
 #if defined(PHP_WIN32)
-		Sleep((DWORD) HTTP_MSEC(HTTP_G(send).throttle_delay));
+		Sleep((DWORD) HTTP_MSEC(HTTP_G->send.throttle_delay));
 #elif defined(HAVE_USLEEP)
-		usleep(HTTP_USEC(HTTP_G(send).throttle_delay));
+		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;
+		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;
@@ -71,16 +65,13 @@ static inline void _http_flush(const char *data, size_t data_len TSRMLS_DC)
 #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)
 {
-	if (http_encoding_response_start(content_length)) {
+	int encoding;
+	
+	if ((encoding = http_encoding_response_start(content_length))) {
 #ifdef HTTP_HAVE_ZLIB
-		char *encoded;
-		size_t encoded_len;
-		http_encoding_stream *s = emalloc(sizeof(http_encoding_stream));
-		
-		http_encoding_stream_init(s, HTTP_G(send).gzip_encoding == HTTP_ENCODING_GZIP, -1, &encoded, &encoded_len);
-		phpstr_chunked_output(&s->storage, encoded, encoded_len, HTTP_G(send).buffer_size, _http_flush TSRMLS_CC);
-		STR_FREE(encoded);
-		*buffer = s;
+		*buffer = http_encoding_deflate_stream_init(NULL, 
+			(encoding == HTTP_ENCODING_GZIP) ? 
+				HTTP_DEFLATE_TYPE_GZIP : HTTP_DEFLATE_TYPE_ZLIB);
 #endif
 	}
 }
@@ -90,30 +81,30 @@ static inline void _http_send_response_start(void **buffer, size_t content_lengt
 #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).gzip_encoding) {
+	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_stream_update(s, data, data_len, &encoded, &encoded_len);
-		phpstr_chunked_output(&s->storage, encoded, encoded_len, HTTP_G(send).buffer_size, _http_flush TSRMLS_CC);
+		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 TSRMLS_CC);
+		phpstr_chunked_output((phpstr **) buffer, data, data_len, HTTP_G->send.buffer_size, _http_flush, NULL TSRMLS_CC);
 	}
 }
 /* }}} */
 
-#define HTTP_CHUNK_AVAIL(len, cs) ((len -= cs) >= 0)
 /* {{{ 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)
 {
-	long len = end - begin, chunk_size = 40960;
+	char *buf;
+	long got, len = end - begin;
 	
 	switch (mode)
 	{
@@ -122,16 +113,14 @@ static inline void _http_send_response_data_fetch(void **buffer, const void *dat
 			php_stream *s = (php_stream *) data;
 
 			if (SUCCESS == php_stream_seek(s, begin, SEEK_SET)) {
-				char *buf = emalloc(chunk_size);
-
-				while (HTTP_CHUNK_AVAIL(len, chunk_size)) {
-					http_send_response_data_plain(buffer, buf, php_stream_read(s, buf, chunk_size));
-				}
-				/* read & write left over */
-				if (len) {
-					http_send_response_data_plain(buffer, buf, php_stream_read(s, buf, chunk_size + len));
+				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;
 				}
-	
+				
 				efree(buf);
 			}
 		}
@@ -139,15 +128,13 @@ static inline void _http_send_response_data_fetch(void **buffer, const void *dat
 
 		case SEND_DATA:
 		{
-			char *s = (char *) data + begin;
-
-			while (HTTP_CHUNK_AVAIL(len, chunk_size)) {
-				http_send_response_data_plain(buffer, s, chunk_size);
-				s += chunk_size;
-			}
-			/* write left over */
-			if (len) {
-				http_send_response_data_plain(buffer, s, chunk_size + len);
+			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;
 			}
 		}
 		break;
@@ -161,25 +148,39 @@ static inline void _http_send_response_data_fetch(void **buffer, const void *dat
 #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).gzip_encoding) {
+	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_stream_finish(s, &encoded, &encoded_len);
-		phpstr_chunked_output(&s->storage, encoded, encoded_len, 0, _http_flush TSRMLS_CC);
+		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);
-		efree(s);
 #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 TSRMLS_CC);
+		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)
@@ -226,7 +227,7 @@ PHP_HTTP_API STATUS _http_send_last_modified_ex(time_t t, char **sent_header TSR
 	efree(date);
 
 	/* remember */
-	HTTP_G(send).last_modified = t;
+	HTTP_G->send.last_modified = t;
 
 	return ret;
 }
@@ -237,18 +238,19 @@ PHP_HTTP_API STATUS _http_send_etag_ex(const char *etag, size_t etag_len, char *
 {
 	STATUS status;
 	char *etag_header;
+	size_t etag_header_len;
 
 	if (!etag_len){
-		http_error_ex(HE_WARNING, HTTP_E_HEADER, "Attempt to send empty ETag (previous: %s)\n", HTTP_G(send).unquoted_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 */
-	STR_SET(HTTP_G(send).unquoted_etag, estrndup(etag, etag_len));
+	STR_SET(HTTP_G->send.unquoted_etag, estrndup(etag, etag_len));
 
-	etag_len = spprintf(&etag_header, 0, "ETag: \"%s\"", etag);
-	status = http_send_header_string_ex(etag_header, etag_len, 1);
-	
 	if (sent_header) {
 		*sent_header = etag_header;
 	} else {
@@ -265,8 +267,8 @@ PHP_HTTP_API STATUS _http_send_content_type(const char *content_type, size_t ct_
 	HTTP_CHECK_CONTENT_TYPE(content_type, return FAILURE);
 
 	/* remember for multiple ranges */
-	STR_FREE(HTTP_G(send).content_type);
-	HTTP_G(send).content_type = estrndup(content_type, ct_len);
+	STR_FREE(HTTP_G->send.content_type);
+	HTTP_G->send.content_type = estrndup(content_type, ct_len);
 
 	return http_send_header_ex("Content-Type", lenof("Content-Type"), content_type, ct_len, 1, NULL);
 }
@@ -298,7 +300,6 @@ PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_s
 	void *s = NULL;
 	HashTable ranges;
 	http_range_status range_status;
-	int cache_etag = http_interrupt_ob_etaghandler();
 	
 	if (!data_ptr) {
 		return FAILURE;
@@ -313,94 +314,110 @@ PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_s
 	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;
-	}
-	
 	switch (range_status)
 	{
+		case RANGE_ERR:
+		{
+			zend_hash_destroy(&ranges);
+			http_send_status(416);
+			return FAILURE;
+		}
 		case RANGE_OK:
 		{
 			/* Range Request - only send ranges if entity hasn't changed */
-			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)) {
+			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 (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)) {
-						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/%lu", Z_LVAL_PP(begin), Z_LVAL_PP(end), (ulong) 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;
-					}
+				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 {
-					/* 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) time(NULL), (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);
+					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, 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;
+					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);
-						}
+						
+						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;
 				}
+				
+				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;
 			}
 		}
 		case RANGE_NO:
 		{
 			zend_hash_destroy(&ranges);
-			
+
 			/* send 304 Not Modified if etag matches - DON'T return on ETag generation failure */
-			if (!no_cache && cache_etag) {
+			if (!no_cache && (http_interrupt_ob_etaghandler() || (HTTP_G->send.unquoted_etag != NULL))) {
 				char *etag = NULL;
 				
-				if (etag = http_etag(data_ptr, data_size, data_mode)) {
+				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);
@@ -408,15 +425,17 @@ PHP_HTTP_API STATUS _http_send_ex(const void *data_ptr, size_t data_size, http_s
 						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)) {
+			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);
+				http_send_last_modified_ex(HTTP_G->send.last_modified, &sent_header);
 				return http_exit_ex(304, sent_header, NULL, 0);
 			}
 			
@@ -451,6 +470,69 @@ 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:
  * tab-width: 4