Add a Python HTTP example.

Author: mattmoor

.travis.yml

@@ -55,3 +55,4 @@ script:
   # Second, HTTP.
   - ./examples/hellohttp/e2e-test.sh java
   - ./examples/hellohttp/e2e-test.sh go
+  - ./examples/hellohttp/e2e-test.sh py

WORKSPACE

@@ -148,9 +148,24 @@ pip_import(
     requirements = "//examples/hellogrpc/py:requirements.txt",
 )
 
-load("@examples_helloworld_pip//:requirements.bzl", "pip_install")
+load(
+    "@examples_helloworld_pip//:requirements.bzl",
+    grpcpip_install = "pip_install",
+)
+
+grpcpip_install()
+
+pip_import(
+    name = "examples_hellohttp_pip",
+    requirements = "//examples/hellohttp/py:requirements.txt",
+)
+
+load(
+    "@examples_hellohttp_pip//:requirements.bzl",
+    httppip_install = "pip_install",
+)
 
-pip_install()
+httppip_install()
 
 # We use py_image to build a sample service
 load(

examples/hellohttp/py/BUILD

@@ -0,0 +1,36 @@
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# 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.
+package(default_visibility = ["//visibility:public"])
+
+licenses(["notice"])  # Apache 2.0
+
+load("@examples_hellohttp_pip//:requirements.bzl", "all_requirements")
+load("@io_bazel_rules_docker//python:image.bzl", "py_image")
+
+py_image(
+    name = "server",
+    srcs = ["server.py"],
+    main = "server.py",
+    deps = all_requirements,
+)
+
+load("@k8s_deploy//:defaults.bzl", "k8s_deploy")
+
+k8s_deploy(
+    name = "staging",
+    images = {
+        "us.gcr.io/not-my-project/hello-http:staging": ":server",
+    },
+    template = "//examples/hellohttp:deployment.yaml",
+)

examples/hellohttp/py/edit.sh

@@ -0,0 +1,19 @@
+#!/bin/bash -e
+
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# 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.
+
+SUFFIX="$1"
+
+sed -i "s/DEMO *[a-z0-9_-]* */DEMO${SUFFIX} /g" ./examples/hellohttp/py/server.py

examples/hellohttp/py/requirements.txt

@@ -0,0 +1,2 @@
+Flask==0.12.2
+gunicorn==19.4.5

examples/hellohttp/py/server.py

@@ -0,0 +1,25 @@
+# Copyright 2017 The Bazel Authors. All rights reserved.
+#
+# 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.
+"""Demo HTTP application."""
+
+from flask import Flask
+
+app = Flask(__name__)
+
+@app.route('/')
+def get():
+  return 'DEMO '
+
+if __name__ == '__main__':
+  app.run(host='0.0.0.0', port=8080, debug=True)