add code for analysis of data

1 files changed, 1125 insertions, 0 deletions

diff --git a/venv/lib/python3.8/site-packages/werkzeug/serving.py b/venv/lib/python3.8/site-packages/werkzeug/serving.py
new file mode 100644
index 0000000..ef32b88
--- /dev/null
+++ b/venv/lib/python3.8/site-packages/werkzeug/serving.py
@@ -0,0 +1,1125 @@
+"""A WSGI and HTTP server for use **during development only**. This
+server is convenient to use, but is not designed to be particularly
+stable, secure, or efficient. Use a dedicate WSGI server and HTTP
+server when deploying to production.
+
+It provides features like interactive debugging and code reloading. Use
+``run_simple`` to start the server. Put this in a ``run.py`` script:
+
+.. code-block:: python
+
+    from myapp import create_app
+    from werkzeug import run_simple
+"""
+
+from __future__ import annotations
+
+import errno
+import io
+import os
+import selectors
+import socket
+import socketserver
+import sys
+import typing as t
+from datetime import datetime as dt
+from datetime import timedelta
+from datetime import timezone
+from http.server import BaseHTTPRequestHandler
+from http.server import HTTPServer
+from urllib.parse import unquote
+from urllib.parse import urlsplit
+
+from ._internal import _log
+from ._internal import _wsgi_encoding_dance
+from .exceptions import InternalServerError
+from .urls import uri_to_iri
+
+try:
+    import ssl
+
+    connection_dropped_errors: tuple[type[Exception], ...] = (
+        ConnectionError,
+        socket.timeout,
+        ssl.SSLEOFError,
+    )
+except ImportError:
+
+    class _SslDummy:
+        def __getattr__(self, name: str) -> t.Any:
+            raise RuntimeError(  # noqa: B904
+                "SSL is unavailable because this Python runtime was not"
+                " compiled with SSL/TLS support."
+            )
+
+    ssl = _SslDummy()  # type: ignore
+    connection_dropped_errors = (ConnectionError, socket.timeout)
+
+_log_add_style = True
+
+if os.name == "nt":
+    try:
+        __import__("colorama")
+    except ImportError:
+        _log_add_style = False
+
+can_fork = hasattr(os, "fork")
+
+if can_fork:
+    ForkingMixIn = socketserver.ForkingMixIn
+else:
+
+    class ForkingMixIn:  # type: ignore
+        pass
+
+
+try:
+    af_unix = socket.AF_UNIX
+except AttributeError:
+    af_unix = None  # type: ignore
+
+LISTEN_QUEUE = 128
+
+_TSSLContextArg = t.Optional[
+    t.Union["ssl.SSLContext", t.Tuple[str, t.Optional[str]], t.Literal["adhoc"]]
+]
+
+if t.TYPE_CHECKING:
+    from _typeshed.wsgi import WSGIApplication
+    from _typeshed.wsgi import WSGIEnvironment
+    from cryptography.hazmat.primitives.asymmetric.rsa import (
+        RSAPrivateKeyWithSerialization,
+    )
+    from cryptography.x509 import Certificate
+
+
+class DechunkedInput(io.RawIOBase):
+    """An input stream that handles Transfer-Encoding 'chunked'"""
+
+    def __init__(self, rfile: t.IO[bytes]) -> None:
+        self._rfile = rfile
+        self._done = False
+        self._len = 0
+
+    def readable(self) -> bool:
+        return True
+
+    def read_chunk_len(self) -> int:
+        try:
+            line = self._rfile.readline().decode("latin1")
+            _len = int(line.strip(), 16)
+        except ValueError as e:
+            raise OSError("Invalid chunk header") from e
+        if _len < 0:
+            raise OSError("Negative chunk length not allowed")
+        return _len
+
+    def readinto(self, buf: bytearray) -> int:  # type: ignore
+        read = 0
+        while not self._done and read < len(buf):
+            if self._len == 0:
+                # This is the first chunk or we fully consumed the previous
+                # one. Read the next length of the next chunk
+                self._len = self.read_chunk_len()
+
+            if self._len == 0:
+                # Found the final chunk of size 0. The stream is now exhausted,
+                # but there is still a final newline that should be consumed
+                self._done = True
+
+            if self._len > 0:
+                # There is data (left) in this chunk, so append it to the
+                # buffer. If this operation fully consumes the chunk, this will
+                # reset self._len to 0.
+                n = min(len(buf), self._len)
+
+                # If (read + chunk size) becomes more than len(buf), buf will
+                # grow beyond the original size and read more data than
+                # required. So only read as much data as can fit in buf.
+                if read + n > len(buf):
+                    buf[read:] = self._rfile.read(len(buf) - read)
+                    self._len -= len(buf) - read
+                    read = len(buf)
+                else:
+                    buf[read : read + n] = self._rfile.read(n)
+                    self._len -= n
+                    read += n
+
+            if self._len == 0:
+                # Skip the terminating newline of a chunk that has been fully
+                # consumed. This also applies to the 0-sized final chunk
+                terminator = self._rfile.readline()
+                if terminator not in (b"\n", b"\r\n", b"\r"):
+                    raise OSError("Missing chunk terminating newline")
+
+        return read
+
+
+class WSGIRequestHandler(BaseHTTPRequestHandler):
+    """A request handler that implements WSGI dispatching."""
+
+    server: BaseWSGIServer
+
+    @property
+    def server_version(self) -> str:  # type: ignore
+        return self.server._server_version
+
+    def make_environ(self) -> WSGIEnvironment:
+        request_url = urlsplit(self.path)
+        url_scheme = "http" if self.server.ssl_context is None else "https"
+
+        if not self.client_address:
+            self.client_address = ("<local>", 0)
+        elif isinstance(self.client_address, str):
+            self.client_address = (self.client_address, 0)
+
+        # If there was no scheme but the path started with two slashes,
+        # the first segment may have been incorrectly parsed as the
+        # netloc, prepend it to the path again.
+        if not request_url.scheme and request_url.netloc:
+            path_info = f"/{request_url.netloc}{request_url.path}"
+        else:
+            path_info = request_url.path
+
+        path_info = unquote(path_info)
+
+        environ: WSGIEnvironment = {
+            "wsgi.version": (1, 0),
+            "wsgi.url_scheme": url_scheme,
+            "wsgi.input": self.rfile,
+            "wsgi.errors": sys.stderr,
+            "wsgi.multithread": self.server.multithread,
+            "wsgi.multiprocess": self.server.multiprocess,
+            "wsgi.run_once": False,
+            "werkzeug.socket": self.connection,
+            "SERVER_SOFTWARE": self.server_version,
+            "REQUEST_METHOD": self.command,
+            "SCRIPT_NAME": "",
+            "PATH_INFO": _wsgi_encoding_dance(path_info),
+            "QUERY_STRING": _wsgi_encoding_dance(request_url.query),
+            # Non-standard, added by mod_wsgi, uWSGI
+            "REQUEST_URI": _wsgi_encoding_dance(self.path),
+            # Non-standard, added by gunicorn
+            "RAW_URI": _wsgi_encoding_dance(self.path),
+            "REMOTE_ADDR": self.address_string(),
+            "REMOTE_PORT": self.port_integer(),
+            "SERVER_NAME": self.server.server_address[0],
+            "SERVER_PORT": str(self.server.server_address[1]),
+            "SERVER_PROTOCOL": self.request_version,
+        }
+
+        for key, value in self.headers.items():
+            if "_" in key:
+                continue
+
+            key = key.upper().replace("-", "_")
+            value = value.replace("\r\n", "")
+            if key not in ("CONTENT_TYPE", "CONTENT_LENGTH"):
+                key = f"HTTP_{key}"
+                if key in environ:
+                    value = f"{environ[key]},{value}"
+            environ[key] = value
+
+        if environ.get("HTTP_TRANSFER_ENCODING", "").strip().lower() == "chunked":
+            environ["wsgi.input_terminated"] = True
+            environ["wsgi.input"] = DechunkedInput(environ["wsgi.input"])
+
+        # Per RFC 2616, if the URL is absolute, use that as the host.
+        # We're using "has a scheme" to indicate an absolute URL.
+        if request_url.scheme and request_url.netloc:
+            environ["HTTP_HOST"] = request_url.netloc
+
+        try:
+            # binary_form=False gives nicer information, but wouldn't be compatible with
+            # what Nginx or Apache could return.
+            peer_cert = self.connection.getpeercert(binary_form=True)
+            if peer_cert is not None:
+                # Nginx and Apache use PEM format.
+                environ["SSL_CLIENT_CERT"] = ssl.DER_cert_to_PEM_cert(peer_cert)
+        except ValueError:
+            # SSL handshake hasn't finished.
+            self.server.log("error", "Cannot fetch SSL peer certificate info")
+        except AttributeError:
+            # Not using TLS, the socket will not have getpeercert().
+            pass
+
+        return environ
+
+    def run_wsgi(self) -> None:
+        if self.headers.get("Expect", "").lower().strip() == "100-continue":
+            self.wfile.write(b"HTTP/1.1 100 Continue\r\n\r\n")
+
+        self.environ = environ = self.make_environ()
+        status_set: str | None = None
+        headers_set: list[tuple[str, str]] | None = None
+        status_sent: str | None = None
+        headers_sent: list[tuple[str, str]] | None = None
+        chunk_response: bool = False
+
+        def write(data: bytes) -> None:
+            nonlocal status_sent, headers_sent, chunk_response
+            assert status_set is not None, "write() before start_response"
+            assert headers_set is not None, "write() before start_response"
+            if status_sent is None:
+                status_sent = status_set
+                headers_sent = headers_set
+                try:
+                    code_str, msg = status_sent.split(None, 1)
+                except ValueError:
+                    code_str, msg = status_sent, ""
+                code = int(code_str)
+                self.send_response(code, msg)
+                header_keys = set()
+                for key, value in headers_sent:
+                    self.send_header(key, value)
+                    header_keys.add(key.lower())
+
+                # Use chunked transfer encoding if there is no content
+                # length. Do not use for 1xx and 204 responses. 304
+                # responses and HEAD requests are also excluded, which
+                # is the more conservative behavior and matches other
+                # parts of the code.
+                # https://httpwg.org/specs/rfc7230.html#rfc.section.3.3.1
+                if (
+                    not (
+                        "content-length" in header_keys
+                        or environ["REQUEST_METHOD"] == "HEAD"
+                        or (100 <= code < 200)
+                        or code in {204, 304}
+                    )
+                    and self.protocol_version >= "HTTP/1.1"
+                ):
+                    chunk_response = True
+                    self.send_header("Transfer-Encoding", "chunked")
+
+                # Always close the connection. This disables HTTP/1.1
+                # keep-alive connections. They aren't handled well by
+                # Python's http.server because it doesn't know how to
+                # drain the stream before the next request line.
+                self.send_header("Connection", "close")
+                self.end_headers()
+
+            assert isinstance(data, bytes), "applications must write bytes"
+
+            if data:
+                if chunk_response:
+                    self.wfile.write(hex(len(data))[2:].encode())
+                    self.wfile.write(b"\r\n")
+
+                self.wfile.write(data)
+
+                if chunk_response:
+                    self.wfile.write(b"\r\n")
+
+            self.wfile.flush()
+
+        def start_response(status, headers, exc_info=None):  # type: ignore
+            nonlocal status_set, headers_set
+            if exc_info:
+                try:
+                    if headers_sent:
+                        raise exc_info[1].with_traceback(exc_info[2])
+                finally:
+                    exc_info = None
+            elif headers_set:
+                raise AssertionError("Headers already set")
+            status_set = status
+            headers_set = headers
+            return write
+
+        def execute(app: WSGIApplication) -> None:
+            application_iter = app(environ, start_response)
+            try:
+                for data in application_iter:
+                    write(data)
+                if not headers_sent:
+                    write(b"")
+                if chunk_response:
+                    self.wfile.write(b"0\r\n\r\n")
+            finally:
+                # Check for any remaining data in the read socket, and discard it. This
+                # will read past request.max_content_length, but lets the client see a
+                # 413 response instead of a connection reset failure. If we supported
+                # keep-alive connections, this naive approach would break by reading the
+                # next request line. Since we know that write (above) closes every
+                # connection we can read everything.
+                selector = selectors.DefaultSelector()
+                selector.register(self.connection, selectors.EVENT_READ)
+                total_size = 0
+                total_reads = 0
+
+                # A timeout of 0 tends to fail because a client needs a small amount of
+                # time to continue sending its data.
+                while selector.select(timeout=0.01):
+                    # Only read 10MB into memory at a time.
+                    data = self.rfile.read(10_000_000)
+                    total_size += len(data)
+                    total_reads += 1
+
+                    # Stop reading on no data, >=10GB, or 1000 reads. If a client sends
+                    # more than that, they'll get a connection reset failure.
+                    if not data or total_size >= 10_000_000_000 or total_reads > 1000:
+                        break
+
+                selector.close()
+
+                if hasattr(application_iter, "close"):
+                    application_iter.close()
+
+        try:
+            execute(self.server.app)
+        except connection_dropped_errors as e:
+            self.connection_dropped(e, environ)
+        except Exception as e:
+            if self.server.passthrough_errors:
+                raise
+
+            if status_sent is not None and chunk_response:
+                self.close_connection = True
+
+            try:
+                # if we haven't yet sent the headers but they are set
+                # we roll back to be able to set them again.
+                if status_sent is None:
+                    status_set = None
+                    headers_set = None
+                execute(InternalServerError())
+            except Exception:
+                pass
+
+            from .debug.tbtools import DebugTraceback
+
+            msg = DebugTraceback(e).render_traceback_text()
+            self.server.log("error", f"Error on request:\n{msg}")
+
+    def handle(self) -> None:
+        """Handles a request ignoring dropped connections."""
+        try:
+            super().handle()
+        except (ConnectionError, socket.timeout) as e:
+            self.connection_dropped(e)
+        except Exception as e:
+            if self.server.ssl_context is not None and is_ssl_error(e):
+                self.log_error("SSL error occurred: %s", e)
+            else:
+                raise
+
+    def connection_dropped(
+        self, error: BaseException, environ: WSGIEnvironment | None = None
+    ) -> None:
+        """Called if the connection was closed by the client.  By default
+        nothing happens.
+        """
+
+    def __getattr__(self, name: str) -> t.Any:
+        # All HTTP methods are handled by run_wsgi.
+        if name.startswith("do_"):
+            return self.run_wsgi
+
+        # All other attributes are forwarded to the base class.
+        return getattr(super(), name)
+
+    def address_string(self) -> str:
+        if getattr(self, "environ", None):
+            return self.environ["REMOTE_ADDR"]  # type: ignore
+
+        if not self.client_address:
+            return "<local>"
+
+        return self.client_address[0]
+
+    def port_integer(self) -> int:
+        return self.client_address[1]
+
+    # Escape control characters. This is defined (but private) in Python 3.12.
+    _control_char_table = str.maketrans(
+        {c: rf"\x{c:02x}" for c in [*range(0x20), *range(0x7F, 0xA0)]}
+    )
+    _control_char_table[ord("\\")] = r"\\"
+
+    def log_request(self, code: int | str = "-", size: int | str = "-") -> None:
+        try:
+            path = uri_to_iri(self.path)
+            msg = f"{self.command} {path} {self.request_version}"
+        except AttributeError:
+            # path isn't set if the requestline was bad
+            msg = self.requestline
+
+        # Escape control characters that may be in the decoded path.
+        msg = msg.translate(self._control_char_table)
+        code = str(code)
+
+        if code[0] == "1":  # 1xx - Informational
+            msg = _ansi_style(msg, "bold")
+        elif code == "200":  # 2xx - Success
+            pass
+        elif code == "304":  # 304 - Resource Not Modified
+            msg = _ansi_style(msg, "cyan")
+        elif code[0] == "3":  # 3xx - Redirection
+            msg = _ansi_style(msg, "green")
+        elif code == "404":  # 404 - Resource Not Found
+            msg = _ansi_style(msg, "yellow")
+        elif code[0] == "4":  # 4xx - Client Error
+            msg = _ansi_style(msg, "bold", "red")
+        else:  # 5xx, or any other response
+            msg = _ansi_style(msg, "bold", "magenta")
+
+        self.log("info", '"%s" %s %s', msg, code, size)
+
+    def log_error(self, format: str, *args: t.Any) -> None:
+        self.log("error", format, *args)
+
+    def log_message(self, format: str, *args: t.Any) -> None:
+        self.log("info", format, *args)
+
+    def log(self, type: str, message: str, *args: t.Any) -> None:
+        # an IPv6 scoped address contains "%" which breaks logging
+        address_string = self.address_string().replace("%", "%%")
+        _log(
+            type,
+            f"{address_string} - - [{self.log_date_time_string()}] {message}\n",
+            *args,
+        )
+
+
+def _ansi_style(value: str, *styles: str) -> str:
+    if not _log_add_style:
+        return value
+
+    codes = {
+        "bold": 1,
+        "red": 31,
+        "green": 32,
+        "yellow": 33,
+        "magenta": 35,
+        "cyan": 36,
+    }
+
+    for style in styles:
+        value = f"\x1b[{codes[style]}m{value}"
+
+    return f"{value}\x1b[0m"
+
+
+def generate_adhoc_ssl_pair(
+    cn: str | None = None,
+) -> tuple[Certificate, RSAPrivateKeyWithSerialization]:
+    try:
+        from cryptography import x509
+        from cryptography.hazmat.backends import default_backend
+        from cryptography.hazmat.primitives import hashes
+        from cryptography.hazmat.primitives.asymmetric import rsa
+        from cryptography.x509.oid import NameOID
+    except ImportError:
+        raise TypeError(
+            "Using ad-hoc certificates requires the cryptography library."
+        ) from None
+
+    backend = default_backend()
+    pkey = rsa.generate_private_key(
+        public_exponent=65537, key_size=2048, backend=backend
+    )
+
+    # pretty damn sure that this is not actually accepted by anyone
+    if cn is None:
+        cn = "*"
+
+    subject = x509.Name(
+        [
+            x509.NameAttribute(NameOID.ORGANIZATION_NAME, "Dummy Certificate"),
+            x509.NameAttribute(NameOID.COMMON_NAME, cn),
+        ]
+    )
+
+    backend = default_backend()
+    cert = (
+        x509.CertificateBuilder()
+        .subject_name(subject)
+        .issuer_name(subject)
+        .public_key(pkey.public_key())
+        .serial_number(x509.random_serial_number())
+        .not_valid_before(dt.now(timezone.utc))
+        .not_valid_after(dt.now(timezone.utc) + timedelta(days=365))
+        .add_extension(x509.ExtendedKeyUsage([x509.OID_SERVER_AUTH]), critical=False)
+        .add_extension(
+            x509.SubjectAlternativeName([x509.DNSName(cn), x509.DNSName(f"*.{cn}")]),
+            critical=False,
+        )
+        .sign(pkey, hashes.SHA256(), backend)
+    )
+    return cert, pkey
+
+
+def make_ssl_devcert(
+    base_path: str, host: str | None = None, cn: str | None = None
+) -> tuple[str, str]:
+    """Creates an SSL key for development.  This should be used instead of
+    the ``'adhoc'`` key which generates a new cert on each server start.
+    It accepts a path for where it should store the key and cert and
+    either a host or CN.  If a host is given it will use the CN
+    ``*.host/CN=host``.
+
+    For more information see :func:`run_simple`.
+
+    .. versionadded:: 0.9
+
+    :param base_path: the path to the certificate and key.  The extension
+                      ``.crt`` is added for the certificate, ``.key`` is
+                      added for the key.
+    :param host: the name of the host.  This can be used as an alternative
+                 for the `cn`.
+    :param cn: the `CN` to use.
+    """
+
+    if host is not None:
+        cn = host
+    cert, pkey = generate_adhoc_ssl_pair(cn=cn)
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_file = f"{base_path}.crt"
+    pkey_file = f"{base_path}.key"
+
+    with open(cert_file, "wb") as f:
+        f.write(cert.public_bytes(serialization.Encoding.PEM))
+    with open(pkey_file, "wb") as f:
+        f.write(
+            pkey.private_bytes(
+                encoding=serialization.Encoding.PEM,
+                format=serialization.PrivateFormat.TraditionalOpenSSL,
+                encryption_algorithm=serialization.NoEncryption(),
+            )
+        )
+
+    return cert_file, pkey_file
+
+
+def generate_adhoc_ssl_context() -> ssl.SSLContext:
+    """Generates an adhoc SSL context for the development server."""
+    import atexit
+    import tempfile
+
+    cert, pkey = generate_adhoc_ssl_pair()
+
+    from cryptography.hazmat.primitives import serialization
+
+    cert_handle, cert_file = tempfile.mkstemp()
+    pkey_handle, pkey_file = tempfile.mkstemp()
+    atexit.register(os.remove, pkey_file)
+    atexit.register(os.remove, cert_file)
+
+    os.write(cert_handle, cert.public_bytes(serialization.Encoding.PEM))
+    os.write(
+        pkey_handle,
+        pkey.private_bytes(
+            encoding=serialization.Encoding.PEM,
+            format=serialization.PrivateFormat.TraditionalOpenSSL,
+            encryption_algorithm=serialization.NoEncryption(),
+        ),
+    )
+
+    os.close(cert_handle)
+    os.close(pkey_handle)
+    ctx = load_ssl_context(cert_file, pkey_file)
+    return ctx
+
+
+def load_ssl_context(
+    cert_file: str, pkey_file: str | None = None, protocol: int | None = None
+) -> ssl.SSLContext:
+    """Loads SSL context from cert/private key files and optional protocol.
+    Many parameters are directly taken from the API of
+    :py:class:`ssl.SSLContext`.
+
+    :param cert_file: Path of the certificate to use.
+    :param pkey_file: Path of the private key to use. If not given, the key
+                      will be obtained from the certificate file.
+    :param protocol: A ``PROTOCOL`` constant from the :mod:`ssl` module.
+        Defaults to :data:`ssl.PROTOCOL_TLS_SERVER`.
+    """
+    if protocol is None:
+        protocol = ssl.PROTOCOL_TLS_SERVER
+
+    ctx = ssl.SSLContext(protocol)
+    ctx.load_cert_chain(cert_file, pkey_file)
+    return ctx
+
+
+def is_ssl_error(error: Exception | None = None) -> bool:
+    """Checks if the given error (or the current one) is an SSL error."""
+    if error is None:
+        error = t.cast(Exception, sys.exc_info()[1])
+    return isinstance(error, ssl.SSLError)
+
+
+def select_address_family(host: str, port: int) -> socket.AddressFamily:
+    """Return ``AF_INET4``, ``AF_INET6``, or ``AF_UNIX`` depending on
+    the host and port."""
+    if host.startswith("unix://"):
+        return socket.AF_UNIX
+    elif ":" in host and hasattr(socket, "AF_INET6"):
+        return socket.AF_INET6
+    return socket.AF_INET
+
+
+def get_sockaddr(
+    host: str, port: int, family: socket.AddressFamily
+) -> tuple[str, int] | str:
+    """Return a fully qualified socket address that can be passed to
+    :func:`socket.bind`."""
+    if family == af_unix:
+        # Absolute path avoids IDNA encoding error when path starts with dot.
+        return os.path.abspath(host.partition("://")[2])
+    try:
+        res = socket.getaddrinfo(
+            host, port, family, socket.SOCK_STREAM, socket.IPPROTO_TCP
+        )
+    except socket.gaierror:
+        return host, port
+    return res[0][4]  # type: ignore
+
+
+def get_interface_ip(family: socket.AddressFamily) -> str:
+    """Get the IP address of an external interface. Used when binding to
+    0.0.0.0 or ::1 to show a more useful URL.
+
+    :meta private:
+    """
+    # arbitrary private address
+    host = "fd31:f903:5ab5:1::1" if family == socket.AF_INET6 else "10.253.155.219"
+
+    with socket.socket(family, socket.SOCK_DGRAM) as s:
+        try:
+            s.connect((host, 58162))
+        except OSError:
+            return "::1" if family == socket.AF_INET6 else "127.0.0.1"
+
+        return s.getsockname()[0]  # type: ignore
+
+
+class BaseWSGIServer(HTTPServer):
+    """A WSGI server that that handles one request at a time.
+
+    Use :func:`make_server` to create a server instance.
+    """
+
+    multithread = False
+    multiprocess = False
+    request_queue_size = LISTEN_QUEUE
+    allow_reuse_address = True
+
+    def __init__(
+        self,
+        host: str,
+        port: int,
+        app: WSGIApplication,
+        handler: type[WSGIRequestHandler] | None = None,
+        passthrough_errors: bool = False,
+        ssl_context: _TSSLContextArg | None = None,
+        fd: int | None = None,
+    ) -> None:
+        if handler is None:
+            handler = WSGIRequestHandler
+
+        # If the handler doesn't directly set a protocol version and
+        # thread or process workers are used, then allow chunked
+        # responses and keep-alive connections by enabling HTTP/1.1.
+        if "protocol_version" not in vars(handler) and (
+            self.multithread or self.multiprocess
+        ):
+            handler.protocol_version = "HTTP/1.1"
+
+        self.host = host
+        self.port = port
+        self.app = app
+        self.passthrough_errors = passthrough_errors
+
+        self.address_family = address_family = select_address_family(host, port)
+        server_address = get_sockaddr(host, int(port), address_family)
+
+        # Remove a leftover Unix socket file from a previous run. Don't
+        # remove a file that was set up by run_simple.
+        if address_family == af_unix and fd is None:
+            server_address = t.cast(str, server_address)
+
+            if os.path.exists(server_address):
+                os.unlink(server_address)
+
+        # Bind and activate will be handled manually, it should only
+        # happen if we're not using a socket that was already set up.
+        super().__init__(
+            server_address,  # type: ignore[arg-type]
+            handler,
+            bind_and_activate=False,
+        )
+
+        if fd is None:
+            # No existing socket descriptor, do bind_and_activate=True.
+            try:
+                self.server_bind()
+                self.server_activate()
+            except OSError as e:
+                # Catch connection issues and show them without the traceback. Show
+                # extra instructions for address not found, and for macOS.
+                self.server_close()
+                print(e.strerror, file=sys.stderr)
+
+                if e.errno == errno.EADDRINUSE:
+                    print(
+                        f"Port {port} is in use by another program. Either identify and"
+                        " stop that program, or start the server with a different"
+                        " port.",
+                        file=sys.stderr,
+                    )
+
+                    if sys.platform == "darwin" and port == 5000:
+                        print(
+                            "On macOS, try disabling the 'AirPlay Receiver' service"
+                            " from System Preferences -> General -> AirDrop & Handoff.",
+                            file=sys.stderr,
+                        )
+
+                sys.exit(1)
+            except BaseException:
+                self.server_close()
+                raise
+        else:
+            # TCPServer automatically opens a socket even if bind_and_activate is False.
+            # Close it to silence a ResourceWarning.
+            self.server_close()
+
+            # Use the passed in socket directly.
+            self.socket = socket.fromfd(fd, address_family, socket.SOCK_STREAM)
+            self.server_address = self.socket.getsockname()
+
+        if address_family != af_unix:
+            # If port was 0, this will record the bound port.
+            self.port = self.server_address[1]
+
+        if ssl_context is not None:
+            if isinstance(ssl_context, tuple):
+                ssl_context = load_ssl_context(*ssl_context)
+            elif ssl_context == "adhoc":
+                ssl_context = generate_adhoc_ssl_context()
+
+            self.socket = ssl_context.wrap_socket(self.socket, server_side=True)
+            self.ssl_context: ssl.SSLContext | None = ssl_context
+        else:
+            self.ssl_context = None
+
+        import importlib.metadata
+
+        self._server_version = f"Werkzeug/{importlib.metadata.version('werkzeug')}"
+
+    def log(self, type: str, message: str, *args: t.Any) -> None:
+        _log(type, message, *args)
+
+    def serve_forever(self, poll_interval: float = 0.5) -> None:
+        try:
+            super().serve_forever(poll_interval=poll_interval)
+        except KeyboardInterrupt:
+            pass
+        finally:
+            self.server_close()
+
+    def handle_error(
+        self, request: t.Any, client_address: tuple[str, int] | str
+    ) -> None:
+        if self.passthrough_errors:
+            raise
+
+        return super().handle_error(request, client_address)
+
+    def log_startup(self) -> None:
+        """Show information about the address when starting the server."""
+        dev_warning = (
+            "WARNING: This is a development server. Do not use it in a production"
+            " deployment. Use a production WSGI server instead."
+        )
+        dev_warning = _ansi_style(dev_warning, "bold", "red")
+        messages = [dev_warning]
+
+        if self.address_family == af_unix:
+            messages.append(f" * Running on {self.host}")
+        else:
+            scheme = "http" if self.ssl_context is None else "https"
+            display_hostname = self.host
+
+            if self.host in {"0.0.0.0", "::"}:
+                messages.append(f" * Running on all addresses ({self.host})")
+
+                if self.host == "0.0.0.0":
+                    localhost = "127.0.0.1"
+                    display_hostname = get_interface_ip(socket.AF_INET)
+                else:
+                    localhost = "[::1]"
+                    display_hostname = get_interface_ip(socket.AF_INET6)
+
+                messages.append(f" * Running on {scheme}://{localhost}:{self.port}")
+
+            if ":" in display_hostname:
+                display_hostname = f"[{display_hostname}]"
+
+            messages.append(f" * Running on {scheme}://{display_hostname}:{self.port}")
+
+        _log("info", "\n".join(messages))
+
+
+class ThreadedWSGIServer(socketserver.ThreadingMixIn, BaseWSGIServer):
+    """A WSGI server that handles concurrent requests in separate
+    threads.
+
+    Use :func:`make_server` to create a server instance.
+    """
+
+    multithread = True
+    daemon_threads = True
+
+
+class ForkingWSGIServer(ForkingMixIn, BaseWSGIServer):
+    """A WSGI server that handles concurrent requests in separate forked
+    processes.
+
+    Use :func:`make_server` to create a server instance.
+    """
+
+    multiprocess = True
+
+    def __init__(
+        self,
+        host: str,
+        port: int,
+        app: WSGIApplication,
+        processes: int = 40,
+        handler: type[WSGIRequestHandler] | None = None,
+        passthrough_errors: bool = False,
+        ssl_context: _TSSLContextArg | None = None,
+        fd: int | None = None,
+    ) -> None:
+        if not can_fork:
+            raise ValueError("Your platform does not support forking.")
+
+        super().__init__(host, port, app, handler, passthrough_errors, ssl_context, fd)
+        self.max_children = processes
+
+
+def make_server(
+    host: str,
+    port: int,
+    app: WSGIApplication,
+    threaded: bool = False,
+    processes: int = 1,
+    request_handler: type[WSGIRequestHandler] | None = None,
+    passthrough_errors: bool = False,
+    ssl_context: _TSSLContextArg | None = None,
+    fd: int | None = None,
+) -> BaseWSGIServer:
+    """Create an appropriate WSGI server instance based on the value of
+    ``threaded`` and ``processes``.
+
+    This is called from :func:`run_simple`, but can be used separately
+    to have access to the server object, such as to run it in a separate
+    thread.
+
+    See :func:`run_simple` for parameter docs.
+    """
+    if threaded and processes > 1:
+        raise ValueError("Cannot have a multi-thread and multi-process server.")
+
+    if threaded:
+        return ThreadedWSGIServer(
+            host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+        )
+
+    if processes > 1:
+        return ForkingWSGIServer(
+            host,
+            port,
+            app,
+            processes,
+            request_handler,
+            passthrough_errors,
+            ssl_context,
+            fd=fd,
+        )
+
+    return BaseWSGIServer(
+        host, port, app, request_handler, passthrough_errors, ssl_context, fd=fd
+    )
+
+
+def is_running_from_reloader() -> bool:
+    """Check if the server is running as a subprocess within the
+    Werkzeug reloader.
+
+    .. versionadded:: 0.10
+    """
+    return os.environ.get("WERKZEUG_RUN_MAIN") == "true"
+
+
+def run_simple(
+    hostname: str,
+    port: int,
+    application: WSGIApplication,
+    use_reloader: bool = False,
+    use_debugger: bool = False,
+    use_evalex: bool = True,
+    extra_files: t.Iterable[str] | None = None,
+    exclude_patterns: t.Iterable[str] | None = None,
+    reloader_interval: int = 1,
+    reloader_type: str = "auto",
+    threaded: bool = False,
+    processes: int = 1,
+    request_handler: type[WSGIRequestHandler] | None = None,
+    static_files: dict[str, str | tuple[str, str]] | None = None,
+    passthrough_errors: bool = False,
+    ssl_context: _TSSLContextArg | None = None,
+) -> None:
+    """Start a development server for a WSGI application. Various
+    optional features can be enabled.
+
+    .. warning::
+
+        Do not use the development server when deploying to production.
+        It is intended for use only during local development. It is not
+        designed to be particularly efficient, stable, or secure.
+
+    :param hostname: The host to bind to, for example ``'localhost'``.
+        Can be a domain, IPv4 or IPv6 address, or file path starting
+        with ``unix://`` for a Unix socket.
+    :param port: The port to bind to, for example ``8080``. Using ``0``
+        tells the OS to pick a random free port.
+    :param application: The WSGI application to run.
+    :param use_reloader: Use a reloader process to restart the server
+        process when files are changed.
+    :param use_debugger: Use Werkzeug's debugger, which will show
+        formatted tracebacks on unhandled exceptions.
+    :param use_evalex: Make the debugger interactive. A Python terminal
+        can be opened for any frame in the traceback. Some protection is
+        provided by requiring a PIN, but this should never be enabled
+        on a publicly visible server.
+    :param extra_files: The reloader will watch these files for changes
+        in addition to Python modules. For example, watch a
+        configuration file.
+    :param exclude_patterns: The reloader will ignore changes to any
+        files matching these :mod:`fnmatch` patterns. For example,
+        ignore cache files.
+    :param reloader_interval: How often the reloader tries to check for
+        changes.
+    :param reloader_type: The reloader to use. The ``'stat'`` reloader
+        is built in, but may require significant CPU to watch files. The
+        ``'watchdog'`` reloader is much more efficient but requires
+        installing the ``watchdog`` package first.
+    :param threaded: Handle concurrent requests using threads. Cannot be
+        used with ``processes``.
+    :param processes: Handle concurrent requests using up to this number
+        of processes. Cannot be used with ``threaded``.
+    :param request_handler: Use a different
+        :class:`~BaseHTTPServer.BaseHTTPRequestHandler` subclass to
+        handle requests.
+    :param static_files: A dict mapping URL prefixes to directories to
+        serve static files from using
+        :class:`~werkzeug.middleware.SharedDataMiddleware`.
+    :param passthrough_errors: Don't catch unhandled exceptions at the
+        server level, let the server crash instead. If ``use_debugger``
+        is enabled, the debugger will still catch such errors.
+    :param ssl_context: Configure TLS to serve over HTTPS. Can be an
+        :class:`ssl.SSLContext` object, a ``(cert_file, key_file)``
+        tuple to create a typical context, or the string ``'adhoc'`` to
+        generate a temporary self-signed certificate.
+
+    .. versionchanged:: 2.1
+        Instructions are shown for dealing with an "address already in
+        use" error.
+
+    .. versionchanged:: 2.1
+        Running on ``0.0.0.0`` or ``::`` shows the loopback IP in
+        addition to a real IP.
+
+    .. versionchanged:: 2.1
+        The command-line interface was removed.
+
+    .. versionchanged:: 2.0
+        Running on ``0.0.0.0`` or ``::`` shows a real IP address that
+        was bound as well as a warning not to run the development server
+        in production.
+
+    .. versionchanged:: 2.0
+        The ``exclude_patterns`` parameter was added.
+
+    .. versionchanged:: 0.15
+        Bind to a Unix socket by passing a ``hostname`` that starts with
+        ``unix://``.
+
+    .. versionchanged:: 0.10
+        Improved the reloader and added support for changing the backend
+        through the ``reloader_type`` parameter.
+
+    .. versionchanged:: 0.9
+        A command-line interface was added.
+
+    .. versionchanged:: 0.8
+        ``ssl_context`` can be a tuple of paths to the certificate and
+        private key files.
+
+    .. versionchanged:: 0.6
+        The ``ssl_context`` parameter was added.
+
+    .. versionchanged:: 0.5
+       The ``static_files`` and ``passthrough_errors`` parameters were
+       added.
+    """
+    if not isinstance(port, int):
+        raise TypeError("port must be an integer")
+
+    if static_files:
+        from .middleware.shared_data import SharedDataMiddleware
+
+        application = SharedDataMiddleware(application, static_files)
+
+    if use_debugger:
+        from .debug import DebuggedApplication
+
+        application = DebuggedApplication(application, evalex=use_evalex)
+        # Allow the specified hostname to use the debugger, in addition to
+        # localhost domains.
+        application.trusted_hosts.append(hostname)
+
+    if not is_running_from_reloader():
+        fd = None
+    else:
+        fd = int(os.environ["WERKZEUG_SERVER_FD"])
+
+    srv = make_server(
+        hostname,
+        port,
+        application,
+        threaded,
+        processes,
+        request_handler,
+        passthrough_errors,
+        ssl_context,
+        fd=fd,
+    )
+    srv.socket.set_inheritable(True)
+    os.environ["WERKZEUG_SERVER_FD"] = str(srv.fileno())
+
+    if not is_running_from_reloader():
+        srv.log_startup()
+        _log("info", _ansi_style("Press CTRL+C to quit", "yellow"))
+
+    if use_reloader:
+        from ._reloader import run_with_reloader
+
+        try:
+            run_with_reloader(
+                srv.serve_forever,
+                extra_files=extra_files,
+                exclude_patterns=exclude_patterns,
+                interval=reloader_interval,
+                reloader_type=reloader_type,
+            )
+        finally:
+            srv.server_close()
+    else:
+        srv.serve_forever()