From 012fc18be93b98967a20986469eada34eac0c061 Mon Sep 17 00:00:00 2001
From: Makarand Dharmapurikar <makarandd@google.com>
Date: Wed, 28 Sep 2016 10:46:27 -0700
Subject: [PATCH] doc fixes and max-age set to 60

---
 doc/interop-test-descriptions.md   | 15 +++++++++------
 test/cpp/interop/interop_server.cc |  2 +-
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/doc/interop-test-descriptions.md b/doc/interop-test-descriptions.md
index 8a1e93eee0..62d36708f9 100644
--- a/doc/interop-test-descriptions.md
+++ b/doc/interop-test-descriptions.md
@@ -67,13 +67,17 @@ of POST, and that server sets appropriate cache control headers for the response
 to be cached by a proxy. This interop test requires that the server is behind
 a caching proxy. Use of current timestamp in the request prevents accidental
 cache matches left over from previous tests.
+Note that client adds a `x-user-ip` header with value `1.2.3.4` to the request.
+This is done since some proxys such as GFE will not cache requests from
+localhost.
 
 Server features:
 * [CacheableUnaryCall][]
 
 Procedure:
  1. Client calls CacheableUnaryCall with `SimpleRequest` request with payload
-    set to current timestamp.
+    set to current timestamp. Timestamp format is irrelevant, and resolution is
+    in nanoseconds.
  2. Client calls CacheableUnaryCall with `SimpleRequest` request again
     immediately with the same payload as the previous request.
 
@@ -965,13 +969,12 @@ for the `SimpleRequest.response_type`. If the server does not support the
 ### CacheableUnaryCall
 
 Server gets the default SimpleRequest proto as the request. The content of the
-request are ignored. It returns the SimpleResponse proto with the payload set 
-to current timestamp string.  In addition it adds
+request is ignored. It returns the SimpleResponse proto with the payload set
+to current timestamp.  The timestamp is an integer representing current time
+with nanosecond resolution. In addition it adds
   1. cache control headers such that the response can be cached by proxies in
      the response path. Server should be behind a caching proxy for this test
-     to pass.
-  2. adds a `x-user-ip` header with `1.2.3.4` to the response. This is done
-     since some proxys such as GFE will not cache requests from localhost.
+     to pass. Currently we set the max-age to 60 seconds.
 
 ### CompressedResponse
 [CompressedResponse]: #compressedresponse
diff --git a/test/cpp/interop/interop_server.cc b/test/cpp/interop/interop_server.cc
index 64eec4241a..06d1bdb796 100644
--- a/test/cpp/interop/interop_server.cc
+++ b/test/cpp/interop/interop_server.cc
@@ -159,7 +159,7 @@ class TestServiceImpl : public TestService::Service {
     gpr_timespec ts = gpr_now(GPR_CLOCK_REALTIME);
     std::string timestamp = std::to_string(ts.tv_nsec);
     response->mutable_payload()->set_body(timestamp.c_str(), timestamp.size());
-    context->AddInitialMetadata("cache-control", "max-age=100000, public");
+    context->AddInitialMetadata("cache-control", "max-age=60, public");
     return Status::OK;
   }
 
-- 
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