313 lines
10 KiB
Python
313 lines
10 KiB
Python
import rp2
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import network
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import ubinascii
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import time
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import usocket
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import json
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import sys
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def get_logger():
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try:
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import logging
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except ImportError:
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import mip
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mip.install("logging")
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import logging
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logging.basicConfig(stream=sys.stdout, level=logging.DEBUG)
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global logger
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logger = logging.getLogger(__name__)
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class Request:
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@staticmethod
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def parse_header(request):
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http_lines = request.decode().split('\r\n')
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http_request_split = http_lines[0].split(' ')
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http_request_path_split = http_request_split[1].split('?')
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http_request = Request(
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method=http_request_split[0], path=http_request_path_split[0],
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protocol=http_request_split[2]
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)
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if len(http_request_path_split) > 1:
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http_request.parameter = dict(
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param.split('=')
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for param in http_request_path_split[1].split('&')
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)
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if len(http_lines) > 1:
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http_request.header = dict(
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header.split(': ')
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for header in http_lines[1:]
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if header is not None and header != ""
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)
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return http_request
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def __init__(
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self, method, path, protocol,
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host="", header={}, content=None, parameter={}):
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self._method = method
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self._host = host
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self._path = path
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self._parameter = parameter
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self._protocol = protocol
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self._header = header
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self._content = content
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def __repr__(self):
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return repr({
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"method": self._method,
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"host": self._host,
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"path": self._path,
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"parameter": self._parameter,
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"protocol": self._protocol,
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"header": self._header,
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"content": self._content
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})
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def __str__(self):
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return self.request_bytes.decode()
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@property
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def method(self):
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return self._method
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@method.setter
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def method(self, method):
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if self._method is None or len(self._method) == 0:
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self._method = method
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@property
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def host(self):
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return self._host
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@host.setter
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def host(self, host):
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if self._host is None or len(self._host) == 0:
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self._host = host
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@property
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def path(self):
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return self._path
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@path.setter
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def path(self, path):
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if self._path is None or len(self._path) == 0:
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self._path = path
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@property
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def parameter(self):
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return self._parameter
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@parameter.setter
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def parameter(self, parameter):
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if self._parameter is None or len(self._parameter) == 0:
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self.paramter = parameter
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@property
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def protocol(self):
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return self._protocol
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@protocol.setter
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def protocol(self, protocol):
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if self._protocol is None or len(self._protocol) == 0:
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self._protocol = protocol
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@property
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def header(self):
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return self._header
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@header.setter
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def header(self, header):
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if self._header is None or len(self._header) == 0:
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self._header = header
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@property
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def content(self):
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return self._content
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@content.setter
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def content(self, content):
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if self._content is None or len(self._content) == 0:
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self._content = content
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self._header['Content-Length'] = str(len(content))
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@property
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def request_bytes(self):
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request = bytearray(self._header_request_bytes)
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request.extend(b"" if self._content is None else f"{self._content}".encode())
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return request
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@property
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def _header_request_bytes(self):
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headers = "\r\n".join(': '.join(header) for header in self._header.items())
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strpath = self._path
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if len(self._parameter) > 0:
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strpath += f"?{'&'.join('='.join(item) for item in self._parameter.items())}"
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if len(self._header) == 0:
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return f"{self._method} {strpath} {self._protocol}\r\n\r\n".encode()
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return f"{self._method} {strpath} {self._protocol}\r\n{headers}\r\n\r\n".encode()
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class Response(Request):
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messages = {
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"100": "Continue", "101": "Switching Protocols", "102": "Processing",
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"200": "OK", "201": "Created", "202": "Accepted", "204": "No Content", "206":"Partial Content",
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"300": "Multiple Choice", "301": "Moved Permanently", "302": "Found",
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"400": "Bad Request", "401": "Unauthorized", "403": "Forbidden", "404": "Not Found", "409": "Conflict"
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}
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def __init__(self, method, path, protocol, status,
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host="", header={}, content=None, parameter={}):
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super().__init__(method, path, protocol, host, header, content, parameter)
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self._status = str(status)
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def __repr__(self):
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return repr({
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"method": self._method,
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"host": self._host,
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"path": self._path,
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"parameter": self._parameter,
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"protocol": self._protocol,
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"status": self._status,
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"message": Response.messages[self._status],
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"header": self._header,
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"content": self._content
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})
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def __str__(self):
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return self.response_bytes.decode()
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@property
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def status(self):
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return self._status
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@property
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def response_bytes(self):
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response = bytearray(self._header_response_bytes)
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response.extend(b"" if self._content is None else f"{self._content}".encode())
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return response
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@property
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def _header_response_bytes(self):
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headers = "\r\n".join(': '.join(header) for header in self._header.items())
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strpath = self._path
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if len(self._parameter) > 0:
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strpath += f"?{'&'.join('='.join(item) for item in self._parameter.items())}"
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return f"{self._protocol} {self._status} {Response.messages[self._status]}\r\n{headers}\r\n\r\n".encode()
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class MicroWebServer:
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BUFFER_SIZE = 1024
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@staticmethod
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def buffer_receive(connect, size=-1):
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webrequest = bytearray()
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is_end_stream = False
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while not is_end_stream:
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webrequest.extend(connect.recv(MicroWebServer.BUFFER_SIZE))
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is_end_stream = webrequest.endswith(b'\r\n\r\n') or len(webrequest) >= size
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return webrequest
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@staticmethod
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def socket_receive(connect):
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request_header_bytes = MicroWebServer.buffer_receive(connect)
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request = Request.parse_header(request_header_bytes)
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if 'Content-Length' in request.header and request.header["Content-Length"] != '0':
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request_content_bytes = MicroWebServer.buffer_receive(
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connect, size=int(request.header['Content-Length'])
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)
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content = request_content_bytes.decode()
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request.content = content
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return request
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@staticmethod
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def default_locator():
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return Response(None, None, "HTTP/1.0", 404)
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def __init__(self, listen_addr="0.0.0.0", port=80):
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self._listen_addr = listen_addr
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self._port = port
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self._locations = {}
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def location(self, path):
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def decorator(functor):
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self._locations[path] = functor
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return functor
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return decorator
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@property
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def listen_addr(self):
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return self._listen_addr
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@property
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def port(self):
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return self._port
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def _create_socket(self):
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self._socket_addrinfo = usocket.getaddrinfo(self._listen_addr, self._port)
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self._socket = usocket.socket()
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self._socket.bind(self._socket_addrinfo[0][-1])
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self._socket.listen(1)
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def _handle_request(self, request):
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logger.debug(f"Request: \n{request}")
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if request.path in self._locations.keys():
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return self._locations[request.path]()
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else:
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return MicroWebServer.default_locator()
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def serve(self):
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self._create_socket()
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logger.debug(f"Created socket listening on '{self._listen_addr}:{self._port}'")
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while True:
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try:
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conn, addr = self._socket.accept()
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logger.debug(f"Client connect from '{addr[0]}'")
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request = MicroWebServer.socket_receive(conn)
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response = self._handle_request(request)
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conn.send(response.response_bytes)
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conn.close()
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except OSError as e:
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conn.close()
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logger.debug(f"Client {addr} closed connection.")
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except KeyboardInterrupt:
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machine.reset()
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def connect_wlan(ssid, passphrase, hostname="PicoW", country="DE", power_save=False, max_retry=20, wait_time=1):
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rp2.country(country)
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pm_mode = network.WLAN.PM_NONE if power_save is None else (
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network.WLAN.PM_POWERSAVE if power_save else network.WLAN.PM_PERFORMANCE
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)
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wlan = network.WLAN(network.STA_IF)
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wlan.active(True)
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wlan.config(pm=pm_mode)
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wlan.connect(ssid, passphrase)
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wlan_mac_address = ':'.join("{:02x}".format(x) for x in wlan.config("mac"))
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retry = 0
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while retry < max_retry and (wlan.status() > 0 and wlan.status() < 3):
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print(f"\rTrying to connect to '{ssid}' for {retry*wait_time}s.", end="")
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retry += 1
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time.sleep(wait_time)
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if wlan.status() != 3 or not wlan.isconnected():
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raise RuntimeError(f"\nnetwork connection failure: cannot connect to '{ssid}' from '{wlan_mac_address}'.")
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else:
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ip = wlan.ifconfig()[0]
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print(f"\rConnection to '{ssid}' established. Connected via address '{ip}' from '{wlan_mac_address}'.")
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return wlan
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def main():
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ssid = "SSID"
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pw = "PASSWORD"
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wlan = connect_wlan(ssid, pw)
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get_logger()
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webserver = MicroWebServer()
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@webserver.location(path="/")
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def test_handler():
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return Response("GET", "/", "HTTP/1.0", 204)
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@webserver.location(path="/my/path")
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def test_handler_content():
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body = {
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"Hello":"World"
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}
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resp = Response("GET", "/", "HTTP/1.0", 200)
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# TODO: add some nicer handling with headers and content...
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resp.header = {
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"Content-Type": "application/json"
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}
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resp.content = json.dumps(body)
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print(resp.header)
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return resp
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webserver.serve()
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if __name__=='__main__':
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main()
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