"max-blob-size" config var to limit generated HTML size

Sometimes it is not feasible to generate the HTML pretty-print for large
files, especially if a source-filter is involved or binary data is to be
displayed. The "max-blob-size" config var allows to disable HTML output
for blobs bigger than X KBytes. Plain downloads are not affected.

Signed-off-by: Georg Lukas <georg@op-co.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/ui-tree.c b/ui-tree.c
index f53ab64..f281937 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -94,32 +94,38 @@ static void print_object(const unsigned char *sha1, char *path, const char *base
                                      sha1_to_hex(sha1)));
                 return;
         }
 
         buf = read_sha1_file(sha1, &type, &size);
         if (!buf) {
                 cgit_print_error(fmt("Error reading object %s",
                                      sha1_to_hex(sha1)));
                 return;
         }
 
         html(" (");
         cgit_plain_link("plain", NULL, NULL, ctx.qry.head,
                         curr_rev, path);
         htmlf(")<br/>blob: %s\n", sha1_to_hex(sha1));
 
+        if (ctx.cfg.max_blob_size && size / 1024 > ctx.cfg.max_blob_size) {
+                htmlf("<div class='error'>blob size (%dKB) exceeds display size limit (%dKB).</div>",
+                                size / 1024, ctx.cfg.max_blob_size);
+                return;
+        }
+
         if (buffer_is_binary(buf, size))
                 print_binary_buffer(buf, size);
         else
                 print_text_buffer(basename, buf, size);
 }
 
 
 static int ls_item(const unsigned char *sha1, const char *base, int baselen,
                    const char *pathname, unsigned int mode, int stage,
                    void *cbdata)
 {
         char *name;
         char *fullpath;
         char *class;
         enum object_type type;
         unsigned long size = 0;