add verity script

Author: helight

http-filter-example/README.md

@@ -60,7 +60,7 @@ or you can just use this demo yaml file [config.yaml](config.yaml).
 ```
 - Run an http server
 ```sh
-python httpserver.py
+python ./http-filter-example/httpserver.py
 ```
 - Access the http server with curl cmd:
 ```sh
@@ -82,6 +82,10 @@ via: sample-filter
 x-envoy-expected-rq-timeout-ms: 15000
 content-length: 0
 ```
+- Start service and verify with shell script
+
+1. `bash ./http-filter-example/start_service.sh`
+2. `bash ./http-filter-example/verify.sh`
 
 [StreamDecoderFilter]: https://github.com/envoyproxy/envoy/blob/b2610c84aeb1f75c804d67effcb40592d790e0f1/include/envoy/http/filter.h#L300
 [StreamEncoderFilter]: https://github.com/envoyproxy/envoy/blob/b2610c84aeb1f75c804d67effcb40592d790e0f1/include/envoy/http/filter.h#L413

http-filter-example/httpserver.py

@@ -1,27 +1,30 @@
-#!/usr/bin/python
-from BaseHTTPServer import BaseHTTPRequestHandler,HTTPServer
+#!/usr/bin/python3
+from http.server import BaseHTTPRequestHandler,HTTPServer
 
-PORT = 8081
+HTTP_PORT = 8081
 
+# This class will handles any incoming request
 class doHandler(BaseHTTPRequestHandler):
+
     # Handler for the GET requests
     def do_GET(self):
         self.send_response(200)
         self.send_header('Content-type','text/html')
         self.end_headers()
-        print self.headers  # print the http header
-        # Send the html message
-        self.wfile.write("Hello World !")
+        print(self.headers)
+        # Send the message
+        self.wfile.write(b"Hello World !\r\n")
+        self.wfile.write(self.headers.as_bytes())
         return
 
 try:
-    # Create a web server and define the handler to manage the incoming request
-    server = HTTPServer(('', PORT), doHandler)
-    print 'Started httpserver on port ' , PORT
+    # Create a http server and define the handler to manage the request
+    server = HTTPServer(('', HTTP_PORT), doHandler)
+    print('Started httpserver on port ' , HTTP_PORT)
 
     # Wait forever for incoming http requests
     server.serve_forever()
 
 except KeyboardInterrupt:
-    print 'shutting down the web server'
+    print('^C received, shutting down the web server')
     server.socket.close()

http-filter-example/start_service.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+python3 ./http-filter-example/httpserver.py&
+./bazel-bin/envoy --config-path ./http-filter-example/config.yaml

http-filter-example/verify.sh

@@ -0,0 +1,32 @@
+#!/bin/bash -e
+
+export NAME=http-filter-example
+
+_curl () {
+    local arg curl_command
+    curl_command=(curl -s)
+    if [[ ! "$*" =~ "-X" ]]; then
+        curl_command+=(-X GET)
+    fi
+    for arg in "${@}"; do
+        curl_command+=("$arg")
+    done
+    "${curl_command[@]}" || {
+        echo "ERROR: curl (${curl_command[*]})" >&2
+        return 1
+    }
+}
+
+responds_with () {
+    local expected
+    expected="$1"
+    shift
+    _curl "${@}" | grep "$expected" || {
+        echo "ERROR: curl expected (${*}): $expected" >&2
+        return 1
+    }
+}
+
+responds_with \
+    "via: sample-filter" \
+    "http://localhost:8080"