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

@@ -206,6 +206,7 @@ static void prepare_context(struct cgit_context *ctx)
        ctx->page.size = 0;
        ctx->page.modified = time(NULL);
        ctx->page.expires = ctx->page.modified;
+        ctx->page.etag = NULL;
 }
 struct refmatch {
diff --git a/cgit.h b/cgit.h
index 5f7af51..2bfbe7b 100644
--- a/cgit.h
+++ b/cgit.h

@@ -180,6 +180,7 @@ struct cgit_page {
        char *mimetype;
        char *charset;
        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

@@ -34,6 +34,7 @@ static void print_object(const unsigned char *sha1, const char *path)
        ctx.page.mimetype = "text/plain";
        ctx.page.filename = fmt("%s", path);
        ctx.page.size = size;
+        ctx.page.etag = sha1_to_hex(sha1);
        cgit_print_http_headers(&ctx);
        html_raw(buf, size);
        match = 1;
diff --git a/ui-shared.c b/ui-shared.c
index de77bbf..86a7d29 100644
--- a/ui-shared.c
+++ b/ui-shared.c

@@ -468,6 +468,8 @@ void cgit_print_http_headers(struct cgit_context *ctx)
                      ctx->page.filename);
        htmlf("Last-Modified: %s\n", http_date(ctx->page.modified));
        htmlf("Expires: %s\n", http_date(ctx->page.expires));
+        if (ctx->page.etag)
+                htmlf("ETag: \"%s\"\n", ctx->page.etag);
        html("\n");
 }