4 files changed, 5 insertions, 0 deletions

diff --git a/cgit.c b/cgit.c
index 64d95f9..411e421 100644
--- a/cgit.c
+++ b/cgit.c
@@ -208,2 +208,3 @@ static void prepare_context(struct cgit_context *ctx)
 	ctx->page.expires = ctx->page.modified;
+	ctx->page.etag = NULL;
 }
diff --git a/cgit.h b/cgit.h
index 5f7af51..2bfbe7b 100644
--- a/cgit.h
+++ b/cgit.h
@@ -182,2 +182,3 @@ struct cgit_page {
 	char *filename;
+	char *etag;
 	char *title;
diff --git a/ui-plain.c b/ui-plain.c
index 5addd9e..f73cd14 100644
--- a/ui-plain.c
+++ b/ui-plain.c
@@ -36,2 +36,3 @@ static void print_object(const unsigned char *sha1, const char *path)
 	ctx.page.size = size;
+	ctx.page.etag = sha1_to_hex(sha1);
 	cgit_print_http_headers(&ctx);
diff --git a/ui-shared.c b/ui-shared.c
index de77bbf..86a7d29 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -470,2 +470,4 @@ void cgit_print_http_headers(struct cgit_context *ctx)
 	htmlf("Expires: %s\n", http_date(ctx->page.expires));
+	if (ctx->page.etag)
+		htmlf("ETag: \"%s\"\n", ctx->page.etag);
 	html("\n");