tests: refactor the config test to use a simple python codebase instead

This should also make it possible to run the tests locally on an ARM machine.

tests/apps/config/Procfile

@@ -1 +1 @@
-web: node web.js
+web: python3 -u web.py

tests/apps/config/check_deploy

@@ -11,6 +11,7 @@ test_url() {
 }
 
 base_url="$1"
-test_url / "config-test"
+test_url / "python/http.server"
+test_url /conftest "config-test"
 test_url /hello "Hello
  'world'"

tests/apps/config/package.json

@@ -1,10 +0,0 @@
-{
-  "name": "node-example",
-  "version": "0.0.1",
-  "dependencies": {
-    "express": "4.18.x"
-  },
-  "engines": {
-    "node": "4.2.x"
-  }
-}

tests/apps/config/web.js

@@ -1,16 +0,0 @@
-var express = require('express');
-
-var app = express();
-
-app.get('/', function(request, response) {
-  response.send(process.env.CONFTEST);
-});
-
-app.get('/hello', function(request, response) {
-  response.send(process.env.HELLO);
-});
-
-var port = process.env.PORT || 5000;
-app.listen(port, function() {
-  console.log("Listening on " + port);
-});

tests/apps/config/web.py

@@ -0,0 +1,37 @@
+import http.server
+import json
+import os
+import sys
+
+
+class GetHandler(http.server.BaseHTTPRequestHandler):
+    def do_GET(self):
+        self.send_response(200)
+        self.send_header("Content-Type", "text/plain; charset=utf-8")
+        self.end_headers()
+
+        if self.path == '/':
+            self.wfile.write("python/http.server".encode("utf-8"))
+        elif self.path == '/conftest':
+            value = os.getenv("CONFTEST", "")
+            self.wfile.write(value.encode("utf-8"))
+        elif self.path == '/hello':
+            value = os.getenv("HELLO", "")
+            self.wfile.write(value.encode("utf-8"))
+        else:
+            data = json.dumps(dict(os.environ), sort_keys=True, indent=4)
+            self.wfile.write(data.encode("utf-8"))
+
+
+if __name__ == "__main__":
+    if os.getenv("FAIL_ON_STARTUP") == "true":
+        print("Failing on startup due to FAIL_ON_STARTUP=true")
+        sys.exit(1)
+
+    for arg in sys.argv:
+        print(f"Arg: {arg}")
+
+    port = int(os.getenv("PORT", 5000))
+    server = http.server.HTTPServer(("0.0.0.0", port), GetHandler)
+    print("Listening on port {0}".format(port))
+    server.serve_forever()

tests/apps/python/web.py

@@ -12,6 +12,12 @@ class GetHandler(http.server.BaseHTTPRequestHandler):
 
         if self.path == '/':
             self.wfile.write("python/http.server".encode("utf-8"))
+        elif self.path == '/conftest':
+            value = os.getenv("CONFTEST", "")
+            self.wfile.write(value.encode("utf-8"))
+        elif self.path == '/hello':
+            value = os.getenv("HELLO", "")
+            self.wfile.write(value.encode("utf-8"))
         else:
             data = json.dumps(dict(os.environ), sort_keys=True, indent=4)
             self.wfile.write(data.encode("utf-8"))