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"""Starts a server displaying an interactive version of a code analogy."""
import os
import json
import http.server
import socketserver
from ui.lazy_structure_parser import parse_lazy_structure
PORT = 8001
# https://stackoverflow.com/questions/18444395
class RequestHandler(http.server.BaseHTTPRequestHandler):
"""Server handler for code triplet structures."""
def do_GET(self):
"""Serves static content and parsed structures."""
if self.path == "/Structure":
self.send_good_headers("application/json")
structure = parse_lazy_structure(self.structure)
self.wfile.write(json.dumps(structure).encode())
elif self.path.count("/") == 1:
path = os.environ.get("BUILD_WORKSPACE_DIRECTORY", ".")
path += f"/examples/program_analysis/ui{self.path}"
if self.path == "/":
path += "index.html"
try:
with open(path, "r") as disk_file:
data = disk_file.read().encode()
except OSError:
self.send_response(404)
else:
if ".css" in self.path:
self.send_good_headers("text/css")
else:
self.send_good_headers("text/html")
self.wfile.write(open(path).read().encode())
else:
self.send_response(404)
def send_good_headers(self, content_type):
"""Send a 200 along with the given content_type."""
self.send_response(200)
self.send_header("Access-Control-Allow-Origin", "*")
self.send_header("Content-type", content_type)
self.end_headers()
class ReuseAddrTCPServer(socketserver.TCPServer):
"""Server allowing to start over an existing port.
https://stackoverflow.com/questions/15260558
"""
allow_reuse_address = True
def start_server(structure):
"""Start serving an interactive version of the LazyStructure @structure."""
RequestHandler.structure = structure
with ReuseAddrTCPServer(("", PORT), RequestHandler) as httpd:
print(f"Result available at http://localhost:{PORT}")
httpd.serve_forever()
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