leankg 0.5.4

Lightweight Knowledge Graph for AI-Assisted Development
Documentation 
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#!/usr/bin/env python3
"""Simple HTTP server with CozoDB API proxy for graph viewer."""

import http.server
import json
import os
import urllib.request
import urllib.error

COZO_API = "http://localhost:9070"
PORT = 8080
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))


class Handler(http.server.BaseHTTPRequestHandler):
    def do_GET(self):
        if self.path == "/" or self.path == "/index.html":
            self.send_response(200)
            self.send_header("Content-Type", "text/html")
            self.end_headers()
            with open(os.path.join(SCRIPT_DIR, "index.html"), "rb") as f:
                self.wfile.write(f.read())
        else:
            self.send_response(404)
            self.end_headers()

    def do_POST(self):
        if self.path == "/api/query" or self.path == "/api/text-query":
            try:
                content_length = int(self.headers.get("Content-Length", 0))
                body = self.rfile.read(content_length).decode("utf-8")

                req = urllib.request.Request(
                    f"{COZO_API}/text-query",
                    data=body.encode("utf-8"),
                    headers={"Content-Type": "application/json"},
                    method="POST",
                )
                with urllib.request.urlopen(req, timeout=30) as resp:
                    data = resp.read()
                    self.send_response(200)
                    self.send_header("Content-Type", "application/json")
                    self.send_header("Access-Control-Allow-Origin", "*")
                    self.end_headers()
                    self.wfile.write(data)
            except urllib.error.URLError as e:
                self.send_response(502)
                self.send_header("Content-Type", "application/json")
                self.send_header("Access-Control-Allow-Origin", "*")
                self.end_headers()
                self.wfile.write(json.dumps({"error": str(e)}).encode())
        else:
            self.send_response(404)
            self.end_headers()

    def do_OPTIONS(self):
        self.send_response(200)
        self.send_header("Access-Control-Allow-Origin", "*")
        self.send_header("Access-Control-Allow-Methods", "GET, POST, OPTIONS")
        self.send_header("Access-Control-Allow-Headers", "Content-Type")
        self.end_headers()


if __name__ == "__main__":
    print(f"Serving graph viewer at http://localhost:{PORT}")
    print(f"Proxying CozoDB API at {COZO_API}")
    server = http.server.HTTPServer(("", PORT), Handler)
    server.serve_forever()