Sniff content types where appropriate.

We never sniff for CSS, nor for non-page artefacts (e.g. treeview icons)

svn path=/trunk/netsurf/; revision=12707

1 files changed, 54 insertions, 0 deletions

diff --git a/content/mimesniff.h b/content/mimesniff.h
new file mode 100644
index 000000000..8ddabd2e7
--- /dev/null
+++ b/content/mimesniff.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2011 John-Mark Bell <jmb@netsurf-browser.org>
+ *
+ * This file is part of NetSurf, http://www.netsurf-browser.org/
+ *
+ * NetSurf is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * NetSurf is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** \file
+ * MIME type sniffer (interface)
+ */
+
+#ifndef NETSURF_CONTENT_MIMESNIFF_H_
+#define NETSURF_CONTENT_MIMESNIFF_H_
+
+#include <stdbool.h>
+
+#include <libwapcaplet/libwapcaplet.h>
+#include "utils/errors.h"
+
+struct llcache_handle;
+
+/**
+ * Compute the effective MIME type for an object using the sniffing
+ * algorithm described in draft-abarth-mime-sniff-06.
+ *
+ * \param handle          Source data handle to sniff
+ * \param data            First data chunk, or NULL
+ * \param len             Length of \a data, in bytes
+ * \param sniff_allowed   Whether MIME type sniffing is allowed
+ * \param effective_type  Location to receive computed type
+ * \return NSERROR_OK on success,
+ *         NSERROR_NEED_DATA iff \a data is NULL and data is needed
+ *         NSERROR_NOT_FOUND if sniffing is prohibited and no 
+ *                           Content-Type header was found
+ */
+nserror mimesniff_compute_effective_type(struct llcache_handle *handle,
+		const uint8_t *data, size_t len, bool sniff_allowed,
+		lwc_string **effective_type);
+
+nserror mimesniff_init(void);
+void mimesniff_fini(void);
+
+#endif