Adding a forward proxy AuTest.

tests/gold_tests/forward_proxy/forward_proxy.replay.yaml

@@ -0,0 +1,24 @@
+meta:
+  version: "1.0"
+
+sessions:
+- transactions:
+  - all:
+    client-request:
+      method: "GET"
+      url: "/a/path"
+      version: "1.1"
+      headers:
+        fields:
+        - [ Host, example.com ]
+        - [ uuid, 1 ]
+
+    server-response:
+      status: 200
+      reason: OK
+      headers:
+        fields:
+        - [ Content-Length, 8 ]
+
+    proxy-response:
+      status: 200

tests/gold_tests/forward_proxy/forward_proxy.test.py

@@ -0,0 +1,76 @@
+'''
+'''
+#  Licensed to the Apache Software Foundation (ASF) under one
+#  or more contributor license agreements.  See the NOTICE file
+#  distributed with this work for additional information
+#  regarding copyright ownership.  The ASF licenses this file
+#  to you 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.
+
+import sys
+
+Test.Summary = 'Verify ATS can function as a forward proxy'
+Test.ContinueOnFail = True
+
+
+class ForwardProxyTest:
+    def __init__(self):
+        self.setupOriginServer()
+        self.setupTS()
+
+    def setupOriginServer(self):
+        self.server = Test.MakeVerifierServerProcess("server", "forward_proxy.replay.yaml")
+        self.server.Streams.All = Testers.ContainsExpression(
+            'Received an HTTP/1 request with key 1',
+            'Verify that the server received the request.')
+
+    def setupTS(self):
+        self.ts = Test.MakeATSProcess("ts", enable_tls=True, enable_cache=False)
+        self.ts.addDefaultSSLFiles()
+        self.ts.Disk.ssl_multicert_config.AddLine("dest_ip=* ssl_cert_name=server.pem ssl_key_name=server.key")
+        self.ts.Disk.remap_config.AddLine(
+            f"map / http://127.0.0.1:{self.server.Variables.http_port}/")
+
+        self.ts.Disk.records_config.update({
+            'proxy.config.ssl.server.cert.path': self.ts.Variables.SSLDir,
+            'proxy.config.ssl.server.private_key.path': self.ts.Variables.SSLDir,
+            'proxy.config.ssl.client.verify.server.policy': 'PERMISSIVE',
+            'proxy.config.ssl.keylog_file': '/tmp/keylog.txt',
+
+            'proxy.config.diags.debug.enabled': 1,
+            'proxy.config.diags.debug.tags': "http",
+        })
+
+    def addProxyHttpsToHttpCase(self):
+        """
+        Test ATS as an HTTPS forward proxy behind an HTTP server.
+        """
+        tr = Test.AddTestRun()
+        tr.Processes.Default.StartBefore(self.server)
+        tr.Processes.Default.StartBefore(self.ts)
+        tr.Processes.Default.Command = (
+            f'curl --proxy-insecure -v -H "uuid: 1" '
+            f'--proxy "https://127.0.0.1:{self.ts.Variables.ssl_port}/" '
+            f'http://example.com/')
+        tr.Processes.Default.ReturnCode = 0
+        tr.StillRunningAfter = self.server
+        tr.StillRunningAfter = self.ts
+
+        tr.Processes.Default.Streams.All = Testers.ContainsExpression(
+            '< HTTP/1.1 200 OK',
+            'Verify that curl received a 200 OK response.')
+
+    def run(self):
+        self.addProxyHttpsToHttpCase()
+
+
+ForwardProxyTest().run()