From e754621e73db9533f9670124206b91869b2b35b6 Mon Sep 17 00:00:00 2001
From: tothlac <Laszlo.Toth@otpbank.hu>
Date: Mon, 9 Apr 2018 17:45:51 +0200
Subject: [PATCH] (#1741): Fix quotes in etag values

---
 src/rebar_pkg_resource.erl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/rebar_pkg_resource.erl b/src/rebar_pkg_resource.erl
index 60ad8f909..7d42ccd98 100644
--- a/src/rebar_pkg_resource.erl
+++ b/src/rebar_pkg_resource.erl
@@ -109,7 +109,8 @@ make_vsn(_) ->
 request(Url, ETag) ->
     HttpOptions = [{ssl, ssl_opts(Url)}, {relaxed, true} | rebar_utils:get_proxy_auth()],
 
-    case httpc:request(get, {Url, [{"if-none-match", ETag} || ETag =/= false]++[{"User-Agent", rebar_utils:user_agent()}]},
+    case httpc:request(get, {Url, [{"if-none-match", "\"" ++ ETag ++ "\""} || ETag =/= false]++
+                             [{"User-Agent", rebar_utils:user_agent()}]},
                        HttpOptions,
                        [{body_format, binary}],
                        rebar) of