engine: network: set HTTP buffer to 8kb on all systems, without depending on random constant like BUFSIZ

engine/common/net_ws.c

@@ -2200,6 +2200,8 @@ HTTP downloader
 =================================================
 */
 
+#define MAX_HTTP_BUFFER_SIZE (BIT( 13 ))
+
 typedef struct httpserver_s
 {
 	char host[256];
@@ -2240,7 +2242,7 @@ typedef struct httpfile_s
 	qboolean process;
 
 	// query or response
-   char buf[BUFSIZ+1];
+   char buf[MAX_HTTP_BUFFER_SIZE+1];
    int header_size, query_length, bytes_sent;
 } httpfile_t;
 
@@ -2385,18 +2387,18 @@ process incoming data
 */
 static qboolean HTTP_ProcessStream( httpfile_t *curfile )
 {
-	char buf[BUFSIZ+1];
+	char buf[sizeof( curfile->buf )];
 	char *begin = 0;
 	int res;
 
-	if( curfile->header_size >= BUFSIZ )
+	if( curfile->header_size >= sizeof( buf ))
 	{
-		Con_Reportf( S_ERROR "Header to big\n");
+		Con_Reportf( S_ERROR "Header too big, the size is %s\n", curfile->header_size );
 		HTTP_FreeFile( curfile, true );
 		return false;
 	}
 
-	while( ( res = recv( curfile->socket, buf, BUFSIZ - curfile->header_size, 0 )) > 0) // if we got there, we are receiving data
+	while( ( res = recv( curfile->socket, buf, sizeof( buf ) - curfile->header_size, 0 )) > 0) // if we got there, we are receiving data
 	{
 		curfile->blocktime = 0;