+static gchar *
+get_mime_type_from_uri (const gchar *uri, GError **error)
+{
+ GFile *file;
+ GFileInfo *file_info;
+ const gchar *content_type;
+ gchar *mime_type = NULL;
+
+ file = g_file_new_for_uri (uri);
+ file_info = g_file_query_info (file,
+ G_FILE_ATTRIBUTE_STANDARD_CONTENT_TYPE,
+ 0, NULL, error);
+ g_object_unref (file);
+
+ if (file_info == NULL)
+ return NULL;
+
+ content_type = g_file_info_get_content_type (file_info);
+ if (content_type) {
+ mime_type = g_content_type_get_mime_type (content_type);
+ }
+
+ g_object_unref (file_info);
+ return mime_type;
+}
+
+static gchar *
+get_mime_type_from_data (const gchar *uri, GError **error)
+{
+ GFile *file;
+ GFileInputStream *input_stream;
+ gssize size_read;
+ guchar buffer[1024];
+ gboolean retval;
+ gchar *content_type, *mime_type;
+
+ file = g_file_new_for_uri (uri);
+
+ input_stream = g_file_read (file, NULL, error);
+ if (!input_stream) {
+ g_object_unref (file);
+ return NULL;
+ }
+
+ size_read = g_input_stream_read (G_INPUT_STREAM (input_stream),
+ buffer, sizeof (buffer), NULL, error);
+ if (size_read == -1) {
+ g_object_unref (input_stream);
+ g_object_unref (file);
+ return NULL;
+ }
+
+ retval = g_input_stream_close (G_INPUT_STREAM (input_stream), NULL, error);
+
+ g_object_unref (input_stream);
+ g_object_unref (file);
+ if (!retval)
+ return NULL;
+
+ content_type = g_content_type_guess (NULL, /* no filename */
+ buffer, size_read,
+ NULL);
+ if (!content_type)
+ return NULL;
+
+ mime_type = g_content_type_get_mime_type (content_type);
+ g_free (content_type);
+ return mime_type;
+}
+
+/**
+ * ev_file_get_mime_type:
+ * @uri: the URI
+ * @fast: whether to use fast MIME type detection
+ * @error: a #GError location to store an error, or %NULL
+ *
+ * Note: on unknown MIME types, this may return NULL without @error
+ * being filled in.
+ *
+ * Returns: a newly allocated string with the MIME type of the file at
+ * @uri, or %NULL on error or if the MIME type could not be determined
+ */
+gchar *
+ev_file_get_mime_type (const gchar *uri,
+ gboolean fast,
+ GError **error)
+{
+ return fast ? get_mime_type_from_uri (uri, error) : get_mime_type_from_data (uri, error);