Add libraries

This commit is contained in:
Jimmy 2025-05-05 22:17:47 +12:00
parent 29d7a5bcfc
commit dc691b522b
9 changed files with 1984 additions and 0 deletions

2
lib/microdot/__init__.py Normal file
View File

@ -0,0 +1,2 @@
from microdot.microdot import Microdot, Request, Response, abort, redirect, \
send_file # noqa: F401

8
lib/microdot/helpers.py Normal file
View File

@ -0,0 +1,8 @@
try:
from functools import wraps
except ImportError: # pragma: no cover
# MicroPython does not currently implement functools.wraps
def wraps(wrapped):
def _(wrapper):
return wrapper
return _

1450
lib/microdot/microdot.py Normal file

File diff suppressed because it is too large Load Diff

70
lib/microdot/utemplate.py Normal file
View File

@ -0,0 +1,70 @@
from utemplate import recompile
_loader = None
class Template:
"""A template object.
:param template: The filename of the template to render, relative to the
configured template directory.
"""
@classmethod
def initialize(cls, template_dir='templates',
loader_class=recompile.Loader):
"""Initialize the templating subsystem.
:param template_dir: the directory where templates are stored. This
argument is optional. The default is to load
templates from a *templates* subdirectory.
:param loader_class: the ``utemplate.Loader`` class to use when loading
templates. This argument is optional. The default
is the ``recompile.Loader`` class, which
automatically recompiles templates when they
change.
"""
global _loader
_loader = loader_class(None, template_dir)
def __init__(self, template):
if _loader is None: # pragma: no cover
self.initialize()
#: The name of the template
self.name = template
self.template = _loader.load(template)
def generate(self, *args, **kwargs):
"""Return a generator that renders the template in chunks, with the
given arguments."""
return self.template(*args, **kwargs)
def render(self, *args, **kwargs):
"""Render the template with the given arguments and return it as a
string."""
return ''.join(self.generate(*args, **kwargs))
def generate_async(self, *args, **kwargs):
"""Return an asynchronous generator that renders the template in
chunks, using the given arguments."""
class sync_to_async_iter():
def __init__(self, iter):
self.iter = iter
def __aiter__(self):
return self
async def __anext__(self):
try:
return next(self.iter)
except StopIteration:
raise StopAsyncIteration
return sync_to_async_iter(self.generate(*args, **kwargs))
async def render_async(self, *args, **kwargs):
"""Render the template with the given arguments asynchronously and
return it as a string."""
response = ''
async for chunk in self.generate_async(*args, **kwargs):
response += chunk
return response

231
lib/microdot/websocket.py Normal file
View File

@ -0,0 +1,231 @@
import binascii
import hashlib
from microdot import Request, Response
from microdot.microdot import MUTED_SOCKET_ERRORS, print_exception
from microdot.helpers import wraps
class WebSocketError(Exception):
"""Exception raised when an error occurs in a WebSocket connection."""
pass
class WebSocket:
"""A WebSocket connection object.
An instance of this class is sent to handler functions to manage the
WebSocket connection.
"""
CONT = 0
TEXT = 1
BINARY = 2
CLOSE = 8
PING = 9
PONG = 10
#: Specify the maximum message size that can be received when calling the
#: ``receive()`` method. Messages with payloads that are larger than this
#: size will be rejected and the connection closed. Set to 0 to disable
#: the size check (be aware of potential security issues if you do this),
#: or to -1 to use the value set in
#: ``Request.max_body_length``. The default is -1.
#:
#: Example::
#:
#: WebSocket.max_message_length = 4 * 1024 # up to 4KB messages
max_message_length = -1
def __init__(self, request):
self.request = request
self.closed = False
async def handshake(self):
response = self._handshake_response()
await self.request.sock[1].awrite(
b'HTTP/1.1 101 Switching Protocols\r\n')
await self.request.sock[1].awrite(b'Upgrade: websocket\r\n')
await self.request.sock[1].awrite(b'Connection: Upgrade\r\n')
await self.request.sock[1].awrite(
b'Sec-WebSocket-Accept: ' + response + b'\r\n\r\n')
async def receive(self):
"""Receive a message from the client."""
while True:
opcode, payload = await self._read_frame()
send_opcode, data = self._process_websocket_frame(opcode, payload)
if send_opcode: # pragma: no cover
await self.send(data, send_opcode)
elif data: # pragma: no branch
return data
async def send(self, data, opcode=None):
"""Send a message to the client.
:param data: the data to send, given as a string or bytes.
:param opcode: a custom frame opcode to use. If not given, the opcode
is ``TEXT`` or ``BINARY`` depending on the type of the
data.
"""
frame = self._encode_websocket_frame(
opcode or (self.TEXT if isinstance(data, str) else self.BINARY),
data)
await self.request.sock[1].awrite(frame)
async def close(self):
"""Close the websocket connection."""
if not self.closed: # pragma: no cover
self.closed = True
await self.send(b'', self.CLOSE)
def _handshake_response(self):
connection = False
upgrade = False
websocket_key = None
for header, value in self.request.headers.items():
h = header.lower()
if h == 'connection':
connection = True
if 'upgrade' not in value.lower():
return self.request.app.abort(400)
elif h == 'upgrade':
upgrade = True
if not value.lower() == 'websocket':
return self.request.app.abort(400)
elif h == 'sec-websocket-key':
websocket_key = value
if not connection or not upgrade or not websocket_key:
return self.request.app.abort(400)
d = hashlib.sha1(websocket_key.encode())
d.update(b'258EAFA5-E914-47DA-95CA-C5AB0DC85B11')
return binascii.b2a_base64(d.digest())[:-1]
@classmethod
def _parse_frame_header(cls, header):
fin = header[0] & 0x80
opcode = header[0] & 0x0f
if fin == 0 or opcode == cls.CONT: # pragma: no cover
raise WebSocketError('Continuation frames not supported')
has_mask = header[1] & 0x80
length = header[1] & 0x7f
if length == 126:
length = -2
elif length == 127:
length = -8
return fin, opcode, has_mask, length
def _process_websocket_frame(self, opcode, payload):
if opcode == self.TEXT:
payload = payload.decode()
elif opcode == self.BINARY:
pass
elif opcode == self.CLOSE:
raise WebSocketError('Websocket connection closed')
elif opcode == self.PING:
return self.PONG, payload
elif opcode == self.PONG: # pragma: no branch
return None, None
return None, payload
@classmethod
def _encode_websocket_frame(cls, opcode, payload):
frame = bytearray()
frame.append(0x80 | opcode)
if opcode == cls.TEXT:
payload = payload.encode()
if len(payload) < 126:
frame.append(len(payload))
elif len(payload) < (1 << 16):
frame.append(126)
frame.extend(len(payload).to_bytes(2, 'big'))
else:
frame.append(127)
frame.extend(len(payload).to_bytes(8, 'big'))
frame.extend(payload)
return frame
async def _read_frame(self):
header = await self.request.sock[0].read(2)
if len(header) != 2: # pragma: no cover
raise WebSocketError('Websocket connection closed')
fin, opcode, has_mask, length = self._parse_frame_header(header)
if length == -2:
length = await self.request.sock[0].read(2)
length = int.from_bytes(length, 'big')
elif length == -8:
length = await self.request.sock[0].read(8)
length = int.from_bytes(length, 'big')
max_allowed_length = Request.max_body_length \
if self.max_message_length == -1 else self.max_message_length
if length > max_allowed_length:
raise WebSocketError('Message too large')
if has_mask: # pragma: no cover
mask = await self.request.sock[0].read(4)
payload = await self.request.sock[0].read(length)
if has_mask: # pragma: no cover
payload = bytes(x ^ mask[i % 4] for i, x in enumerate(payload))
return opcode, payload
async def websocket_upgrade(request):
"""Upgrade a request handler to a websocket connection.
This function can be called directly inside a route function to process a
WebSocket upgrade handshake, for example after the user's credentials are
verified. The function returns the websocket object::
@app.route('/echo')
async def echo(request):
if not authenticate_user(request):
abort(401)
ws = await websocket_upgrade(request)
while True:
message = await ws.receive()
await ws.send(message)
"""
ws = WebSocket(request)
await ws.handshake()
@request.after_request
async def after_request(request, response):
return Response.already_handled
return ws
def websocket_wrapper(f, upgrade_function):
@wraps(f)
async def wrapper(request, *args, **kwargs):
ws = await upgrade_function(request)
try:
await f(request, ws, *args, **kwargs)
except OSError as exc:
if exc.errno not in MUTED_SOCKET_ERRORS: # pragma: no cover
raise
except WebSocketError:
pass
except Exception as exc:
print_exception(exc)
finally: # pragma: no cover
try:
await ws.close()
except Exception:
pass
return Response.already_handled
return wrapper
def with_websocket(f):
"""Decorator to make a route a WebSocket endpoint.
This decorator is used to define a route that accepts websocket
connections. The route then receives a websocket object as a second
argument that it can use to send and receive messages::
@app.route('/echo')
@with_websocket
async def echo(request, ws):
while True:
message = await ws.receive()
await ws.send(message)
"""
return websocket_wrapper(f, websocket_upgrade)

View File

14
lib/utemplate/compiled.py Normal file
View File

@ -0,0 +1,14 @@
class Loader:
def __init__(self, pkg, dir):
if dir == ".":
dir = ""
else:
dir = dir.replace("/", ".") + "."
if pkg and pkg != "__main__":
dir = pkg + "." + dir
self.p = dir
def load(self, name):
name = name.replace(".", "_")
return __import__(self.p + name, None, None, (name,)).render

View File

@ -0,0 +1,21 @@
# (c) 2014-2020 Paul Sokolovsky. MIT license.
try:
from uos import stat, remove
except:
from os import stat, remove
from . import source
class Loader(source.Loader):
def load(self, name):
o_path = self.pkg_path + self.compiled_path(name)
i_path = self.pkg_path + self.dir + "/" + name
try:
o_stat = stat(o_path)
i_stat = stat(i_path)
if i_stat[8] > o_stat[8]:
# input file is newer, remove output to force recompile
remove(o_path)
finally:
return super().load(name)

188
lib/utemplate/source.py Normal file
View File

@ -0,0 +1,188 @@
# (c) 2014-2019 Paul Sokolovsky. MIT license.
from . import compiled
class Compiler:
START_CHAR = "{"
STMNT = "%"
STMNT_END = "%}"
EXPR = "{"
EXPR_END = "}}"
def __init__(self, file_in, file_out, indent=0, seq=0, loader=None):
self.file_in = file_in
self.file_out = file_out
self.loader = loader
self.seq = seq
self._indent = indent
self.stack = []
self.in_literal = False
self.flushed_header = False
self.args = "*a, **d"
def indent(self, adjust=0):
if not self.flushed_header:
self.flushed_header = True
self.indent()
self.file_out.write("def render%s(%s):\n" % (str(self.seq) if self.seq else "", self.args))
self.stack.append("def")
self.file_out.write(" " * (len(self.stack) + self._indent + adjust))
def literal(self, s):
if not s:
return
if not self.in_literal:
self.indent()
self.file_out.write('yield """')
self.in_literal = True
self.file_out.write(s.replace('"', '\\"'))
def close_literal(self):
if self.in_literal:
self.file_out.write('"""\n')
self.in_literal = False
def render_expr(self, e):
self.indent()
self.file_out.write('yield str(' + e + ')\n')
def parse_statement(self, stmt):
tokens = stmt.split(None, 1)
if tokens[0] == "args":
if len(tokens) > 1:
self.args = tokens[1]
else:
self.args = ""
elif tokens[0] == "set":
self.indent()
self.file_out.write(stmt[3:].strip() + "\n")
elif tokens[0] == "include":
if not self.flushed_header:
# If there was no other output, we still need a header now
self.indent()
tokens = tokens[1].split(None, 1)
args = ""
if len(tokens) > 1:
args = tokens[1]
if tokens[0][0] == "{":
self.indent()
# "1" as fromlist param is uPy hack
self.file_out.write('_ = __import__(%s.replace(".", "_"), None, None, 1)\n' % tokens[0][2:-2])
self.indent()
self.file_out.write("yield from _.render(%s)\n" % args)
return
with self.loader.input_open(tokens[0][1:-1]) as inc:
self.seq += 1
c = Compiler(inc, self.file_out, len(self.stack) + self._indent, self.seq)
inc_id = self.seq
self.seq = c.compile()
self.indent()
self.file_out.write("yield from render%d(%s)\n" % (inc_id, args))
elif len(tokens) > 1:
if tokens[0] == "elif":
assert self.stack[-1] == "if"
self.indent(-1)
self.file_out.write(stmt + ":\n")
else:
self.indent()
self.file_out.write(stmt + ":\n")
self.stack.append(tokens[0])
else:
if stmt.startswith("end"):
assert self.stack[-1] == stmt[3:]
self.stack.pop(-1)
elif stmt == "else":
assert self.stack[-1] == "if"
self.indent(-1)
self.file_out.write("else:\n")
else:
assert False
def parse_line(self, l):
while l:
start = l.find(self.START_CHAR)
if start == -1:
self.literal(l)
return
self.literal(l[:start])
self.close_literal()
sel = l[start + 1]
#print("*%s=%s=" % (sel, EXPR))
if sel == self.STMNT:
end = l.find(self.STMNT_END)
assert end > 0
stmt = l[start + len(self.START_CHAR + self.STMNT):end].strip()
self.parse_statement(stmt)
end += len(self.STMNT_END)
l = l[end:]
if not self.in_literal and l == "\n":
break
elif sel == self.EXPR:
# print("EXPR")
end = l.find(self.EXPR_END)
assert end > 0
expr = l[start + len(self.START_CHAR + self.EXPR):end].strip()
self.render_expr(expr)
end += len(self.EXPR_END)
l = l[end:]
else:
self.literal(l[start])
l = l[start + 1:]
def header(self):
self.file_out.write("# Autogenerated file\n")
def compile(self):
self.header()
for l in self.file_in:
self.parse_line(l)
self.close_literal()
return self.seq
class Loader(compiled.Loader):
def __init__(self, pkg, dir):
super().__init__(pkg, dir)
self.dir = dir
if pkg == "__main__":
# if pkg isn't really a package, don't bother to use it
# it means we're running from "filesystem directory", not
# from a package.
pkg = None
self.pkg_path = ""
if pkg:
p = __import__(pkg)
if isinstance(p.__path__, str):
# uPy
self.pkg_path = p.__path__
else:
# CPy
self.pkg_path = p.__path__[0]
self.pkg_path += "/"
def input_open(self, template):
path = self.pkg_path + self.dir + "/" + template
return open(path)
def compiled_path(self, template):
return self.dir + "/" + template.replace(".", "_") + ".py"
def load(self, name):
try:
return super().load(name)
except (OSError, ImportError):
pass
compiled_path = self.pkg_path + self.compiled_path(name)
f_in = self.input_open(name)
f_out = open(compiled_path, "w")
c = Compiler(f_in, f_out, loader=self)
c.compile()
f_in.close()
f_out.close()
return super().load(name)