ui-tree: Limit size of binary buffer hexdump

Large binary files will generate an enormous page, which will be really
slow to use

1 files changed, 4 insertions, 2 deletions

diff --git a/ui-tree.c b/ui-tree.c
index 6a16c21..2447fec 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -65,12 +65,12 @@ static void print_text_buffer(const char *name, char *buf, unsigned long size)
 
 static void print_binary_buffer(char *buf, unsigned long size)
 {
-	unsigned long ofs, idx;
+	unsigned long ofs, idx, maxofs = 32768 /* up to 1 MiB */;
 	static char ascii[ROWLEN + 1];
 
 	html("<table summary='blob content' class='bin-blob'>\n");
 	html("<tr><th>ofs</th><th>hex dump</th><th>ascii</th></tr>");
-	for (ofs = 0; ofs < size; ofs += ROWLEN, buf += ROWLEN) {
+	for (ofs = 0; ofs < size && ofs < maxofs; ofs += ROWLEN, buf += ROWLEN) {
 		htmlf("<tr><td class='right'>%04lx</td><td class='hex'>", ofs);
 		for (idx = 0; idx < ROWLEN && ofs + idx < size; idx++)
 			htmlf("%*s%02x",
@@ -83,6 +83,8 @@ static void print_binary_buffer(char *buf, unsigned long size)
 		html_txt(ascii);
 		html("</td></tr>\n");
 	}
+	if (size > maxofs)
+		html("<tr><td>...</td><td>...</td><td></td></tr>\n");
 	html("</table>\n");
 }