Github user mlibbey commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/560#discussion_r59300496
--- Diff: plugins/experimental/acme/acme.c ---
@@ -0,0 +1,347 @@
+/** @file
+
+@section license
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <sys/stat.h>
+
+#include "ts/ts.h"
+#include "ts/ink_platform.h"
+#include "ts/ink_defs.h"
+
+static const char PLUGIN_NAME[] = "acme";
+static const char ACME_WK_PATH[] = ".well-known/acme-challenge/";
+static const char ACME_OK_RESP[] = "HTTP/1.1 200 OK\r\nContent-Type:
application/jose\r\nCache-Control: no-cache\r\n";
--- End diff --
no-cache (https://tools.ietf.org/html/rfc7234#section-5.2.1.4) or no-store
(https://tools.ietf.org/html/rfc7234#section-5.2.1.5)? Eg, cache it, but
validate before serving from cache, or don't cache it at all?
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