Add curl proxy test

scripts/kokoro.sh

@@ -19,19 +19,35 @@ cd "$(dirname "$0")"
 cd ..
 make clean
 
-progs=(docker docker-compose bazel npm)
+# These programs need to be already installed
+progs=(docker docker-compose bazel npm curl)
 for p in "${progs[@]}"
 do
   command -v $p > /dev/null 2>&1 || \
     { echo >&2 "$p is required but not installed. Aborting."; exit 1; }
 done
 
+# Build all relevant docker images. They should all build successfully.
 docker-compose build
 
+# Run all bazel unit tests
 bazel test \
-    //javascript/net/grpc/web/... \
-    //net/grpc/gateway/examples/...
+  //javascript/net/grpc/web/... \
+  //net/grpc/gateway/examples/...
 
+# Build the grpc-web npm package
 cd packages/grpc-web && \
   npm install && \
-  npm run build
+  npm run build && \
+  cd ../..
+
+# Bring up the Echo server and the Envoy proxy (in background).
+# The 'sleep' seems necessary for the docker containers to be fully up
+# and listening before we test the with curl requests
+docker-compose up -d echo-server envoy && sleep 5;
+
+# Run a curl request and verify the output
+source ./scripts/test-proxy.sh
+
+# Remove all docker containers
+docker-compose down

scripts/test-proxy.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# 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
+#
+#     https://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.
+set -ex
+
+# Run a curl request to test the output of the proxy and the backend server.
+# This is a simple unary call with "hello" as the protobuf message
+out=$(curl -s 'http://localhost:8080/grpc.gateway.testing.EchoService/Echo' \
+  -H 'Content-Type: application/grpc-web-text' \
+  -H 'Accept: application/grpc-web-text' \
+  -H 'Connection: keep-alive' \
+  -H 'X-Grpc-Web: 1' \
+  -H 'X-User-Agent: grpc-web-javascript/0.1' \
+  --data-binary 'AAAAAAcKBWhlbGxv')
+
+# Cut out a few parts of the response that we are reasonably sure that should
+# not change.
+#
+# Take he first 13 bytes:
+#   First byte: 00 (data marker)
+#   Next 4 bytes: 00 00 00 07 (length of payload)
+#   Next 7 bytes: 0a 05 68 65 6c 6c 6f (binary proto of "1: hello")
+#   Next 1 byte: 80 (trailer marker)
+# Skip the next 4 bytes:
+#   This represents the length of the trailer frame, which could be unreliable.
+# Take the next 15 bytes:
+#   This is the beginning of the trailer frame, which we are reasonably sure
+#   that it will begin with:
+#     grpc-status:0\r\n
+s1=$(echo "$out" | base64 -d | \
+  { dd bs=1 count=13 ; dd skip=4 bs=1 count=15 ; } 2>/dev/null | \
+  base64)
+
+echo "$s1" | base64 -d | xxd
+
+# Take the 28 bytes we cut out above, the base64-encoded string should be this
+if [ "$s1" != "AAAAAAcKBWhlbGxvgGdycGMtc3RhdHVzOjANCg==" ]; then
+  exit 1;
+fi