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uwebserver.py
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uwebserver.py
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import network
import socket
# import gc
import ujson
import os
# gc.collect()
class UWebServer:
def __init__(self, port=80, request_size_limit=1024, static_dir=None):
self.routes = {}
self.s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
self.s.bind(('', port))
self.s.listen(5)
self.static_dir = static_dir
self.request_size_limit = request_size_limit
def route(self, path, method):
def decorator(f):
self.routes[(path, method)] = f
return f
return decorator
def start(self):
while True:
try:
# if gc.mem_free() < 102000:
# gc.collect()
conn, addr = self.s.accept()
print('[INFO] Got a connection from %s' % str(addr))
request = conn.recv(self.request_size_limit)
request = str(request, 'utf-8')
response_body, content_type, response_code = self.handle_request(request)
response_body = str(response_body)
# Send headers first
conn.sendall(f'HTTP/1.1 {response_code}\r\n'.encode('utf-8'))
conn.sendall(f'Content-Type: {content_type}\r\n'.encode('utf-8'))
conn.sendall(f'Content-Length: {len(response_body)}\r\n'.encode('utf-8'))
conn.sendall('Connection: close\r\n\r\n'.encode('utf-8'))
# Send the response body
conn.sendall(response_body.encode('utf-8'))
# Explicitly close the connection
conn.close()
except OSError as e:
print('[ERROR] OSError: %s' % str(e))
conn.close()
except Exception as e:
print('[ERROR] Exception: %s' % str(e))
conn.close()
def parse_request(self, request):
headers_section, body = request.split('\r\n\r\n', 1) # Split request into headers and body
request_lines = headers_section.split('\r\n') # Split headers into lines
headers = {}
method, path, version = request_lines[0].split()
for line in request_lines[1:]:
k, v = line.split(':', 1)
headers[k.strip()] = v.strip()
return method, path, version, headers, body
def handle_request(self, request):
method, path, version, headers, body = self.parse_request(request)
print('[INFO] %s %s %s' % (str(method), str(path), str(version)))
path = self.sanitize_path(path)
for (route_path, route_method), handler in self.routes.items():
try:
if path == route_path and method == route_method:
if method == "POST":
response_body, content_type, status_code = handler(body)
return response_body, content_type, status_code
elif method == "GET" or method == "HEAD":
response_body, content_type, status_code = handler()
return response_body, content_type, status_code
elif method == "OPTIONS":
response_body, content_type, status_code = handler()
return response_body, content_type, status_code
else:
return 'Unsupported method', 'text/html', '405 Method Not Allowed'
except Exception as e:
print('[ERROR] Exception: %s' % str(e))
return 'Internal Server Error', 'text/html', '500 Internal Server Error'
if self.static_dir and method == "GET":
if path == "/":
static_file_path = self.static_dir + '/index.html'
else:
static_file_path = self.static_dir + '/' + path.lstrip('/')
try:
with open(static_file_path, 'r') as f:
if f.read():
return self.handle_static_file_request(static_file_path)
except OSError:
pass
return "Not Found", "text/html", '404 Not Found'
def handle_static_file_request(self, file_path):
ext = file_path.split('.')[-1]
content_type = {
'html': 'text/html',
'css': 'text/css',
'js': 'application/javascript',
'jpg': 'image/jpeg',
'png': 'image/png',
'gif': 'image/gif',
'ico': 'image/x-icon'
}.get(ext, 'application/octet-stream')
try:
with open(file_path, 'r') as f:
response_body = f.read()
return response_body, content_type, '200 OK'
except Exception as e:
return f"File not found: {str(e)}", "text/html", '404 Not Found'
def sanitize_path(self, path):
parts = path.split('/')
parts = [p for p in parts if p != '..']
return '/'.join(parts)