Initial commit

Signed-off-by: kvmw <[email protected]>

Author: kvmw

.github/workflows/ci.yml

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+name: ci
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+    branches: ['main']
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Python 
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Check Lint
+        run: npm run check

.gitignore

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+.venv

LICENSE

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Procfile

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+web: gunicorn --bind 0.0.0.0:$PORT cook:app

README.md

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+# Config Server Python sample
+
+![CI](https://github.com/spring-cloud-services-samples/cook-python/actions/workflows/ci.yml/badge.svg)
+
+Sample Pyhton application demonstrating the use of Config Server in Tanzu Platform for Cloud Foundry.
+
+For information on the Config Server product in Tanzu Platform for Cloud Foundry, please [see the documentation](https://techdocs.broadcom.com/us/en/vmware-tanzu/spring/spring-cloud-services-for-cloud-foundry/3-3/scs-tanzu/config-server-index.html).
+
+## Building and Deploying
+
+- Create a Config Server instance:
+
+```
+ cf create-service p.config-server standard cook-config-server -c '{ "git": { "uri": "https://github.com/spring-cloud-services-samples/cook-config" } }'
+```
+
+- Install dependencies:
+
+```
+pip install -r requirements.txt 
+```
+
+- Push the application:
+
+```
+ cf push
+```
+
+## Trying It Out
+
+Visit `[ROUTE]/restaurant`, where `[ROUTE]` is the route bound to the application. The "special" of the day will be taken from the configuration repository and the value of `cook.special`.
+
+```
+$ curl https://cook.apps.example.cf-app.com/restaurant
+
+Today's special is: Cake a la mode
+```

config_client.py

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+import os
+import requests
+import json
+from typing import Dict, Any, Optional
+from cfenv import AppEnv
+from oauth2 import OAuth2Client
+
+class ConfigServerClient:
+    def __init__(self):
+        self.env = AppEnv()
+        self.oauth_client = None
+        self.credentials = None
+        
+        # Get configuration parameters from environment variables
+        self.name = os.getenv('APPLICATION_NAME', self.env.name)
+        self.profiles = os.getenv('PROFILES', 'default')
+        self.label = os.getenv('LABEL', 'main')
+        
+        config_server = self.env.get_service(label="p.config-server")
+        if not config_server:
+            raise ValueError("The application is not bound to a 'p.config-server' service instance. Please bind and try again")
+
+        self.credentials = config_server.credentials
+        self.oauth_client = OAuth2Client(
+            client_id=self.credentials['client_id'],
+            client_secret=self.credentials['client_secret'],
+            access_token_uri=self.credentials['access_token_uri']
+        )
+        
+    def _makeHttpRequest(self, url: str, accept_type: str) -> requests.Response:
+        """Make an HTTP request to the config server with the specified accept type"""
+        headers = {
+            'Authorization': f"Bearer {self.oauth_client.get_access_token()}",
+            'Accept': accept_type
+        }
+        
+        try:
+            response = requests.get(url, headers=headers, timeout=30)
+            response.raise_for_status()
+            return response
+        except requests.exceptions.RequestException as e:
+            raise Exception(f"Http error: {str(e)}")
+    
+    def load(self) -> Dict[str, Any]:
+        """Load and merge configuration properties from the config server"""
+        url = f"{self.credentials['uri']}/{self.name}/{self.profiles}/{self.label}"
+        
+        response = self._makeHttpRequest(url, 'application/json')
+        
+        config = {}
+        property_sources = response.json().get('propertySources', [])
+         
+        for property_source in property_sources:
+            config.update(property_source.get('source', {}))
+        
+        return config
+
+    def loadTextResource(self, name: str) -> str:
+        """Load a text resource from the config server"""
+        url = f"{self.credentials['uri']}/{self.name}/{self.profiles}/{self.label}/{name}"
+        
+        response = self._makeHttpRequest(url, 'text/plain')
+        return response.text
+
+    def loadBinaryResource(self, name: str) -> bytes:
+        """Load a binary resource from the config server"""
+        url = f"{self.credentials['uri']}/{self.name}/{self.profiles}/{self.label}/{name}"
+        
+        response = self._makeHttpRequest(url, 'application/octet-stream')
+        return response.content

cook.py

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+import os
+from flask import Flask
+from config_client import ConfigServerClient
+
+app = Flask(__name__)
+
+config_client = ConfigServerClient()
+config = {}
+
+def load_configuration():
+    """Load configuration from config server at startup"""
+    global config
+    try:
+        config = config_client.load()
+        print(f"Configuration loaded successfully")
+    except Exception as e:
+        print(f"Failed to load configuration: {str(e)}")
+        raise e
+
+# Load configuration at startup
+load_configuration()
+
+@app.route('/restaurant')
+def restaurant():
+    return f"Today's special is: {config.get('cook.special', 'none')}"
+
+@app.route('/restaurant/secret-menu')
+def secret_menu():
+    return f"{config.get('secretMenu', 'none')}"
+
+@app.route('/restaurant/dessert-menu')
+def dessert_menu():
+    return f"{config_client.loadTextResource('dessert.json')}"
+
+if __name__ == '__main__':
+   port = int(os.getenv("PORT", 8080))
+   app.run(host='0.0.0.0', port=port) 

env.example

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+# Copy this file to .env and modify values for your environment
+
+# Application name
+APPLICATION_NAME=application
+
+# Profiles
+PROFILES=default
+
+# Label
+LABEL=main