forked from course/hse-2026
76 lines
2.1 KiB
Python
76 lines
2.1 KiB
Python
|
import argparse
|
||
|
|
import requests
|
||
|
|
from strategies import (
|
||
|
|
Proxy, ShardingProxy,
|
||
|
|
ReplicatingProxy, ReplicatingQuorumProxy,
|
||
|
|
RAID3Proxy
|
||
|
|
)
|
||
|
|
import yaml
|
||
|
|
from flask import Flask, jsonify, request
|
||
|
|
|
||
|
|
app = Flask(__name__)
|
||
|
|
|
||
|
|
proxy: Proxy = None
|
||
|
|
|
||
|
|
|
||
|
|
@app.route('/put', methods=['POST'])
|
||
|
|
def put_handler():
|
||
|
|
key = request.args.get('key')
|
||
|
|
value = request.get_json().get('value')
|
||
|
|
|
||
|
|
if key is None or value is None:
|
||
|
|
return jsonify({'error': 'Please provide key and value.'}), 400
|
||
|
|
|
||
|
|
return proxy.put(key, value)
|
||
|
|
|
||
|
|
@app.route('/get', methods=['GET'])
|
||
|
|
def get_handler():
|
||
|
|
key = request.args.get('key')
|
||
|
|
|
||
|
|
if key is None:
|
||
|
|
return jsonify({'error': 'Please provide key.'}), 400
|
||
|
|
|
||
|
|
return proxy.get(key)
|
||
|
|
|
||
|
|
|
||
|
|
@app.route('/state', methods=['GET'])
|
||
|
|
def state_handler():
|
||
|
|
results = ""
|
||
|
|
for _, node in proxy.nodes.items():
|
||
|
|
url = f'{node["url"]}/state'
|
||
|
|
response = requests.get(url)
|
||
|
|
results += f'<h1 style="font-family: monospace;">Response from {url}</h1>{response.content.decode("utf-8")}<hr>'
|
||
|
|
|
||
|
|
return f"<html><body>{results}</body></html>", 200
|
||
|
|
|
||
|
|
|
||
|
|
def load_proxy_from_config(config_path):
|
||
|
|
with open(config_path, 'r') as file:
|
||
|
|
config = yaml.safe_load(file)
|
||
|
|
|
||
|
|
mode = config.get('mode', '')
|
||
|
|
nodes = {}
|
||
|
|
for node in config['nodes']:
|
||
|
|
name = node['name']
|
||
|
|
url = node['url']
|
||
|
|
nodes[name] = {'url': url}
|
||
|
|
if mode == 'sharding':
|
||
|
|
return ShardingProxy(nodes)
|
||
|
|
elif mode == 'replication':
|
||
|
|
return ReplicatingProxy(nodes)
|
||
|
|
elif mode == 'replication-quorum':
|
||
|
|
return ReplicatingQuorumProxy(nodes)
|
||
|
|
elif mode == 'replication-raid3':
|
||
|
|
return RAID3Proxy(nodes)
|
||
|
|
raise ValueError('Invalid mode, allowed values: sharding, replication, replication-quorum')
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
parser = argparse.ArgumentParser(description='Flask app acting as a proxy for key-value nodes')
|
||
|
|
parser.add_argument('-c', '--config', type=str, required=True, help='Path to the YAML config file')
|
||
|
|
parser.add_argument('-p', '--port', type=int, help='Port of the server')
|
||
|
|
args = parser.parse_args()
|
||
|
|
|
||
|
|
proxy = load_proxy_from_config(args.config)
|
||
|
|
|
||
|
|
app.run('0.0.0.0', args.port)
|