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Prior to issue #120485 these servers did not allow port reuse, which makes sense as the behavior of port reuse is surprising if you're not expecting it. It's unclear to me why these services were switched to allow port reuse, but I believe the desired behavior (unless subclasses opt in) is to not allow port reuse. See also: https://bugzilla.redhat.com/show_bug.cgi?id=2323170
1077 lines
39 KiB
Python
1077 lines
39 KiB
Python
"""HTTP server classes.
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Note: BaseHTTPRequestHandler doesn't implement any HTTP request; see
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SimpleHTTPRequestHandler for simple implementations of GET, HEAD and POST.
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It does, however, optionally implement HTTP/1.1 persistent connections.
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XXX To do:
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- log requests even later (to capture byte count)
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- log user-agent header and other interesting goodies
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- send error log to separate file
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"""
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# See also:
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#
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# HTTP Working Group T. Berners-Lee
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# INTERNET-DRAFT R. T. Fielding
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# <draft-ietf-http-v10-spec-00.txt> H. Frystyk Nielsen
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# Expires September 8, 1995 March 8, 1995
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#
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# URL: http://www.ics.uci.edu/pub/ietf/http/draft-ietf-http-v10-spec-00.txt
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#
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# and
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#
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# Network Working Group R. Fielding
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# Request for Comments: 2616 et al
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# Obsoletes: 2068 June 1999
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# Category: Standards Track
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#
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# URL: http://www.faqs.org/rfcs/rfc2616.html
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# Log files
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# ---------
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#
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# Here's a quote from the NCSA httpd docs about log file format.
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#
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# | The logfile format is as follows. Each line consists of:
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# |
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# | host rfc931 authuser [DD/Mon/YYYY:hh:mm:ss] "request" ddd bbbb
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# |
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# | host: Either the DNS name or the IP number of the remote client
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# | rfc931: Any information returned by identd for this person,
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# | - otherwise.
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# | authuser: If user sent a userid for authentication, the user name,
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# | - otherwise.
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# | DD: Day
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# | Mon: Month (calendar name)
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# | YYYY: Year
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# | hh: hour (24-hour format, the machine's timezone)
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# | mm: minutes
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# | ss: seconds
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# | request: The first line of the HTTP request as sent by the client.
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# | ddd: the status code returned by the server, - if not available.
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# | bbbb: the total number of bytes sent,
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# | *not including the HTTP/1.0 header*, - if not available
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# |
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# | You can determine the name of the file accessed through request.
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#
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# (Actually, the latter is only true if you know the server configuration
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# at the time the request was made!)
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__version__ = "0.6"
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__all__ = [
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"HTTPServer", "ThreadingHTTPServer",
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"HTTPSServer", "ThreadingHTTPSServer",
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"BaseHTTPRequestHandler", "SimpleHTTPRequestHandler",
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]
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import datetime
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import email.utils
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import html
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import http.client
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import io
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import itertools
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import mimetypes
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import os
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import posixpath
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import shutil
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import socket
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import socketserver
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import sys
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import time
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import urllib.parse
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from http import HTTPStatus
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# Default error message template
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DEFAULT_ERROR_MESSAGE = """\
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<!DOCTYPE HTML>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<style type="text/css">
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:root {
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color-scheme: light dark;
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}
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</style>
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<title>Error response</title>
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</head>
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<body>
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<h1>Error response</h1>
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<p>Error code: %(code)d</p>
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<p>Message: %(message)s.</p>
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<p>Error code explanation: %(code)s - %(explain)s.</p>
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</body>
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</html>
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"""
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DEFAULT_ERROR_CONTENT_TYPE = "text/html;charset=utf-8"
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class HTTPServer(socketserver.TCPServer):
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allow_reuse_address = True # Seems to make sense in testing environment
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allow_reuse_port = False
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def server_bind(self):
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"""Override server_bind to store the server name."""
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socketserver.TCPServer.server_bind(self)
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host, port = self.server_address[:2]
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self.server_name = socket.getfqdn(host)
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self.server_port = port
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class ThreadingHTTPServer(socketserver.ThreadingMixIn, HTTPServer):
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daemon_threads = True
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class HTTPSServer(HTTPServer):
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def __init__(self, server_address, RequestHandlerClass,
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bind_and_activate=True, *, certfile, keyfile=None,
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password=None, alpn_protocols=None):
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try:
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import ssl
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except ImportError:
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raise RuntimeError("SSL module is missing; "
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"HTTPS support is unavailable")
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self.ssl = ssl
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self.certfile = certfile
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self.keyfile = keyfile
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self.password = password
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# Support by default HTTP/1.1
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self.alpn_protocols = (
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["http/1.1"] if alpn_protocols is None else alpn_protocols
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)
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super().__init__(server_address,
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RequestHandlerClass,
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bind_and_activate)
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def server_activate(self):
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"""Wrap the socket in SSLSocket."""
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super().server_activate()
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context = self._create_context()
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self.socket = context.wrap_socket(self.socket, server_side=True)
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def _create_context(self):
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"""Create a secure SSL context."""
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context = self.ssl.create_default_context(self.ssl.Purpose.CLIENT_AUTH)
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context.load_cert_chain(self.certfile, self.keyfile, self.password)
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context.set_alpn_protocols(self.alpn_protocols)
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return context
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class ThreadingHTTPSServer(socketserver.ThreadingMixIn, HTTPSServer):
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daemon_threads = True
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class BaseHTTPRequestHandler(socketserver.StreamRequestHandler):
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"""HTTP request handler base class.
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The following explanation of HTTP serves to guide you through the
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code as well as to expose any misunderstandings I may have about
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HTTP (so you don't need to read the code to figure out I'm wrong
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:-).
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HTTP (HyperText Transfer Protocol) is an extensible protocol on
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top of a reliable stream transport (e.g. TCP/IP). The protocol
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recognizes three parts to a request:
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1. One line identifying the request type and path
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2. An optional set of RFC-822-style headers
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3. An optional data part
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The headers and data are separated by a blank line.
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The first line of the request has the form
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<command> <path> <version>
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where <command> is a (case-sensitive) keyword such as GET or POST,
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<path> is a string containing path information for the request,
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and <version> should be the string "HTTP/1.0" or "HTTP/1.1".
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<path> is encoded using the URL encoding scheme (using %xx to signify
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the ASCII character with hex code xx).
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The specification specifies that lines are separated by CRLF but
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for compatibility with the widest range of clients recommends
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servers also handle LF. Similarly, whitespace in the request line
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is treated sensibly (allowing multiple spaces between components
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and allowing trailing whitespace).
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Similarly, for output, lines ought to be separated by CRLF pairs
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but most clients grok LF characters just fine.
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If the first line of the request has the form
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<command> <path>
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(i.e. <version> is left out) then this is assumed to be an HTTP
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0.9 request; this form has no optional headers and data part and
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the reply consists of just the data.
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The reply form of the HTTP 1.x protocol again has three parts:
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1. One line giving the response code
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2. An optional set of RFC-822-style headers
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3. The data
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Again, the headers and data are separated by a blank line.
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The response code line has the form
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<version> <responsecode> <responsestring>
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where <version> is the protocol version ("HTTP/1.0" or "HTTP/1.1"),
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<responsecode> is a 3-digit response code indicating success or
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failure of the request, and <responsestring> is an optional
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human-readable string explaining what the response code means.
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This server parses the request and the headers, and then calls a
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function specific to the request type (<command>). Specifically,
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a request SPAM will be handled by a method do_SPAM(). If no
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such method exists the server sends an error response to the
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client. If it exists, it is called with no arguments:
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do_SPAM()
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Note that the request name is case sensitive (i.e. SPAM and spam
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are different requests).
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The various request details are stored in instance variables:
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- client_address is the client IP address in the form (host,
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port);
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- command, path and version are the broken-down request line;
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- headers is an instance of email.message.Message (or a derived
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class) containing the header information;
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- rfile is a file object open for reading positioned at the
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start of the optional input data part;
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- wfile is a file object open for writing.
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IT IS IMPORTANT TO ADHERE TO THE PROTOCOL FOR WRITING!
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The first thing to be written must be the response line. Then
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follow 0 or more header lines, then a blank line, and then the
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actual data (if any). The meaning of the header lines depends on
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the command executed by the server; in most cases, when data is
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returned, there should be at least one header line of the form
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Content-type: <type>/<subtype>
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where <type> and <subtype> should be registered MIME types,
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e.g. "text/html" or "text/plain".
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"""
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# The Python system version, truncated to its first component.
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sys_version = "Python/" + sys.version.split()[0]
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# The server software version. You may want to override this.
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# The format is multiple whitespace-separated strings,
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# where each string is of the form name[/version].
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server_version = "BaseHTTP/" + __version__
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error_message_format = DEFAULT_ERROR_MESSAGE
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error_content_type = DEFAULT_ERROR_CONTENT_TYPE
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|
# The default request version. This only affects responses up until
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# the point where the request line is parsed, so it mainly decides what
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# the client gets back when sending a malformed request line.
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# Most web servers default to HTTP 0.9, i.e. don't send a status line.
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default_request_version = "HTTP/0.9"
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def parse_request(self):
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"""Parse a request (internal).
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The request should be stored in self.raw_requestline; the results
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are in self.command, self.path, self.request_version and
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self.headers.
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Return True for success, False for failure; on failure, any relevant
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error response has already been sent back.
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"""
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self.command = None # set in case of error on the first line
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self.request_version = version = self.default_request_version
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self.close_connection = True
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requestline = str(self.raw_requestline, 'iso-8859-1')
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requestline = requestline.rstrip('\r\n')
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self.requestline = requestline
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words = requestline.split()
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if len(words) == 0:
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return False
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|
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if len(words) >= 3: # Enough to determine protocol version
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version = words[-1]
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try:
|
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if not version.startswith('HTTP/'):
|
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raise ValueError
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base_version_number = version.split('/', 1)[1]
|
|
version_number = base_version_number.split(".")
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# RFC 2145 section 3.1 says there can be only one "." and
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# - major and minor numbers MUST be treated as
|
|
# separate integers;
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# - HTTP/2.4 is a lower version than HTTP/2.13, which in
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|
# turn is lower than HTTP/12.3;
|
|
# - Leading zeros MUST be ignored by recipients.
|
|
if len(version_number) != 2:
|
|
raise ValueError
|
|
if any(not component.isdigit() for component in version_number):
|
|
raise ValueError("non digit in http version")
|
|
if any(len(component) > 10 for component in version_number):
|
|
raise ValueError("unreasonable length http version")
|
|
version_number = int(version_number[0]), int(version_number[1])
|
|
except (ValueError, IndexError):
|
|
self.send_error(
|
|
HTTPStatus.BAD_REQUEST,
|
|
"Bad request version (%r)" % version)
|
|
return False
|
|
if version_number >= (1, 1) and self.protocol_version >= "HTTP/1.1":
|
|
self.close_connection = False
|
|
if version_number >= (2, 0):
|
|
self.send_error(
|
|
HTTPStatus.HTTP_VERSION_NOT_SUPPORTED,
|
|
"Invalid HTTP version (%s)" % base_version_number)
|
|
return False
|
|
self.request_version = version
|
|
|
|
if not 2 <= len(words) <= 3:
|
|
self.send_error(
|
|
HTTPStatus.BAD_REQUEST,
|
|
"Bad request syntax (%r)" % requestline)
|
|
return False
|
|
command, path = words[:2]
|
|
if len(words) == 2:
|
|
self.close_connection = True
|
|
if command != 'GET':
|
|
self.send_error(
|
|
HTTPStatus.BAD_REQUEST,
|
|
"Bad HTTP/0.9 request type (%r)" % command)
|
|
return False
|
|
self.command, self.path = command, path
|
|
|
|
# gh-87389: The purpose of replacing '//' with '/' is to protect
|
|
# against open redirect attacks possibly triggered if the path starts
|
|
# with '//' because http clients treat //path as an absolute URI
|
|
# without scheme (similar to http://path) rather than a path.
|
|
if self.path.startswith('//'):
|
|
self.path = '/' + self.path.lstrip('/') # Reduce to a single /
|
|
|
|
# Examine the headers and look for a Connection directive.
|
|
try:
|
|
self.headers = http.client.parse_headers(self.rfile,
|
|
_class=self.MessageClass)
|
|
except http.client.LineTooLong as err:
|
|
self.send_error(
|
|
HTTPStatus.REQUEST_HEADER_FIELDS_TOO_LARGE,
|
|
"Line too long",
|
|
str(err))
|
|
return False
|
|
except http.client.HTTPException as err:
|
|
self.send_error(
|
|
HTTPStatus.REQUEST_HEADER_FIELDS_TOO_LARGE,
|
|
"Too many headers",
|
|
str(err)
|
|
)
|
|
return False
|
|
|
|
conntype = self.headers.get('Connection', "")
|
|
if conntype.lower() == 'close':
|
|
self.close_connection = True
|
|
elif (conntype.lower() == 'keep-alive' and
|
|
self.protocol_version >= "HTTP/1.1"):
|
|
self.close_connection = False
|
|
# Examine the headers and look for an Expect directive
|
|
expect = self.headers.get('Expect', "")
|
|
if (expect.lower() == "100-continue" and
|
|
self.protocol_version >= "HTTP/1.1" and
|
|
self.request_version >= "HTTP/1.1"):
|
|
if not self.handle_expect_100():
|
|
return False
|
|
return True
|
|
|
|
def handle_expect_100(self):
|
|
"""Decide what to do with an "Expect: 100-continue" header.
|
|
|
|
If the client is expecting a 100 Continue response, we must
|
|
respond with either a 100 Continue or a final response before
|
|
waiting for the request body. The default is to always respond
|
|
with a 100 Continue. You can behave differently (for example,
|
|
reject unauthorized requests) by overriding this method.
|
|
|
|
This method should either return True (possibly after sending
|
|
a 100 Continue response) or send an error response and return
|
|
False.
|
|
|
|
"""
|
|
self.send_response_only(HTTPStatus.CONTINUE)
|
|
self.end_headers()
|
|
return True
|
|
|
|
def handle_one_request(self):
|
|
"""Handle a single HTTP request.
|
|
|
|
You normally don't need to override this method; see the class
|
|
__doc__ string for information on how to handle specific HTTP
|
|
commands such as GET and POST.
|
|
|
|
"""
|
|
try:
|
|
self.raw_requestline = self.rfile.readline(65537)
|
|
if len(self.raw_requestline) > 65536:
|
|
self.requestline = ''
|
|
self.request_version = ''
|
|
self.command = ''
|
|
self.send_error(HTTPStatus.REQUEST_URI_TOO_LONG)
|
|
return
|
|
if not self.raw_requestline:
|
|
self.close_connection = True
|
|
return
|
|
if not self.parse_request():
|
|
# An error code has been sent, just exit
|
|
return
|
|
mname = 'do_' + self.command
|
|
if not hasattr(self, mname):
|
|
self.send_error(
|
|
HTTPStatus.NOT_IMPLEMENTED,
|
|
"Unsupported method (%r)" % self.command)
|
|
return
|
|
method = getattr(self, mname)
|
|
method()
|
|
self.wfile.flush() #actually send the response if not already done.
|
|
except TimeoutError as e:
|
|
#a read or a write timed out. Discard this connection
|
|
self.log_error("Request timed out: %r", e)
|
|
self.close_connection = True
|
|
return
|
|
|
|
def handle(self):
|
|
"""Handle multiple requests if necessary."""
|
|
self.close_connection = True
|
|
|
|
self.handle_one_request()
|
|
while not self.close_connection:
|
|
self.handle_one_request()
|
|
|
|
def send_error(self, code, message=None, explain=None):
|
|
"""Send and log an error reply.
|
|
|
|
Arguments are
|
|
* code: an HTTP error code
|
|
3 digits
|
|
* message: a simple optional 1 line reason phrase.
|
|
*( HTAB / SP / VCHAR / %x80-FF )
|
|
defaults to short entry matching the response code
|
|
* explain: a detailed message defaults to the long entry
|
|
matching the response code.
|
|
|
|
This sends an error response (so it must be called before any
|
|
output has been generated), logs the error, and finally sends
|
|
a piece of HTML explaining the error to the user.
|
|
|
|
"""
|
|
|
|
try:
|
|
shortmsg, longmsg = self.responses[code]
|
|
except KeyError:
|
|
shortmsg, longmsg = '???', '???'
|
|
if message is None:
|
|
message = shortmsg
|
|
if explain is None:
|
|
explain = longmsg
|
|
self.log_error("code %d, message %s", code, message)
|
|
self.send_response(code, message)
|
|
self.send_header('Connection', 'close')
|
|
|
|
# Message body is omitted for cases described in:
|
|
# - RFC7230: 3.3. 1xx, 204(No Content), 304(Not Modified)
|
|
# - RFC7231: 6.3.6. 205(Reset Content)
|
|
body = None
|
|
if (code >= 200 and
|
|
code not in (HTTPStatus.NO_CONTENT,
|
|
HTTPStatus.RESET_CONTENT,
|
|
HTTPStatus.NOT_MODIFIED)):
|
|
# HTML encode to prevent Cross Site Scripting attacks
|
|
# (see bug #1100201)
|
|
content = (self.error_message_format % {
|
|
'code': code,
|
|
'message': html.escape(message, quote=False),
|
|
'explain': html.escape(explain, quote=False)
|
|
})
|
|
body = content.encode('UTF-8', 'replace')
|
|
self.send_header("Content-Type", self.error_content_type)
|
|
self.send_header('Content-Length', str(len(body)))
|
|
self.end_headers()
|
|
|
|
if self.command != 'HEAD' and body:
|
|
self.wfile.write(body)
|
|
|
|
def send_response(self, code, message=None):
|
|
"""Add the response header to the headers buffer and log the
|
|
response code.
|
|
|
|
Also send two standard headers with the server software
|
|
version and the current date.
|
|
|
|
"""
|
|
self.log_request(code)
|
|
self.send_response_only(code, message)
|
|
self.send_header('Server', self.version_string())
|
|
self.send_header('Date', self.date_time_string())
|
|
|
|
def send_response_only(self, code, message=None):
|
|
"""Send the response header only."""
|
|
if self.request_version != 'HTTP/0.9':
|
|
if message is None:
|
|
if code in self.responses:
|
|
message = self.responses[code][0]
|
|
else:
|
|
message = ''
|
|
if not hasattr(self, '_headers_buffer'):
|
|
self._headers_buffer = []
|
|
self._headers_buffer.append(("%s %d %s\r\n" %
|
|
(self.protocol_version, code, message)).encode(
|
|
'latin-1', 'strict'))
|
|
|
|
def send_header(self, keyword, value):
|
|
"""Send a MIME header to the headers buffer."""
|
|
if self.request_version != 'HTTP/0.9':
|
|
if not hasattr(self, '_headers_buffer'):
|
|
self._headers_buffer = []
|
|
self._headers_buffer.append(
|
|
("%s: %s\r\n" % (keyword, value)).encode('latin-1', 'strict'))
|
|
|
|
if keyword.lower() == 'connection':
|
|
if value.lower() == 'close':
|
|
self.close_connection = True
|
|
elif value.lower() == 'keep-alive':
|
|
self.close_connection = False
|
|
|
|
def end_headers(self):
|
|
"""Send the blank line ending the MIME headers."""
|
|
if self.request_version != 'HTTP/0.9':
|
|
self._headers_buffer.append(b"\r\n")
|
|
self.flush_headers()
|
|
|
|
def flush_headers(self):
|
|
if hasattr(self, '_headers_buffer'):
|
|
self.wfile.write(b"".join(self._headers_buffer))
|
|
self._headers_buffer = []
|
|
|
|
def log_request(self, code='-', size='-'):
|
|
"""Log an accepted request.
|
|
|
|
This is called by send_response().
|
|
|
|
"""
|
|
if isinstance(code, HTTPStatus):
|
|
code = code.value
|
|
self.log_message('"%s" %s %s',
|
|
self.requestline, str(code), str(size))
|
|
|
|
def log_error(self, format, *args):
|
|
"""Log an error.
|
|
|
|
This is called when a request cannot be fulfilled. By
|
|
default it passes the message on to log_message().
|
|
|
|
Arguments are the same as for log_message().
|
|
|
|
XXX This should go to the separate error log.
|
|
|
|
"""
|
|
|
|
self.log_message(format, *args)
|
|
|
|
# https://en.wikipedia.org/wiki/List_of_Unicode_characters#Control_codes
|
|
_control_char_table = str.maketrans(
|
|
{c: fr'\x{c:02x}' for c in itertools.chain(range(0x20), range(0x7f,0xa0))})
|
|
_control_char_table[ord('\\')] = r'\\'
|
|
|
|
def log_message(self, format, *args):
|
|
"""Log an arbitrary message.
|
|
|
|
This is used by all other logging functions. Override
|
|
it if you have specific logging wishes.
|
|
|
|
The first argument, FORMAT, is a format string for the
|
|
message to be logged. If the format string contains
|
|
any % escapes requiring parameters, they should be
|
|
specified as subsequent arguments (it's just like
|
|
printf!).
|
|
|
|
The client ip and current date/time are prefixed to
|
|
every message.
|
|
|
|
Unicode control characters are replaced with escaped hex
|
|
before writing the output to stderr.
|
|
|
|
"""
|
|
|
|
message = format % args
|
|
sys.stderr.write("%s - - [%s] %s\n" %
|
|
(self.address_string(),
|
|
self.log_date_time_string(),
|
|
message.translate(self._control_char_table)))
|
|
|
|
def version_string(self):
|
|
"""Return the server software version string."""
|
|
return self.server_version + ' ' + self.sys_version
|
|
|
|
def date_time_string(self, timestamp=None):
|
|
"""Return the current date and time formatted for a message header."""
|
|
if timestamp is None:
|
|
timestamp = time.time()
|
|
return email.utils.formatdate(timestamp, usegmt=True)
|
|
|
|
def log_date_time_string(self):
|
|
"""Return the current time formatted for logging."""
|
|
now = time.time()
|
|
year, month, day, hh, mm, ss, x, y, z = time.localtime(now)
|
|
s = "%02d/%3s/%04d %02d:%02d:%02d" % (
|
|
day, self.monthname[month], year, hh, mm, ss)
|
|
return s
|
|
|
|
weekdayname = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
|
|
|
|
monthname = [None,
|
|
'Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun',
|
|
'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec']
|
|
|
|
def address_string(self):
|
|
"""Return the client address."""
|
|
|
|
return self.client_address[0]
|
|
|
|
# Essentially static class variables
|
|
|
|
# The version of the HTTP protocol we support.
|
|
# Set this to HTTP/1.1 to enable automatic keepalive
|
|
protocol_version = "HTTP/1.0"
|
|
|
|
# MessageClass used to parse headers
|
|
MessageClass = http.client.HTTPMessage
|
|
|
|
# hack to maintain backwards compatibility
|
|
responses = {
|
|
v: (v.phrase, v.description)
|
|
for v in HTTPStatus.__members__.values()
|
|
}
|
|
|
|
|
|
class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
|
|
|
|
"""Simple HTTP request handler with GET and HEAD commands.
|
|
|
|
This serves files from the current directory and any of its
|
|
subdirectories. The MIME type for files is determined by
|
|
calling the .guess_type() method.
|
|
|
|
The GET and HEAD requests are identical except that the HEAD
|
|
request omits the actual contents of the file.
|
|
|
|
"""
|
|
|
|
server_version = "SimpleHTTP/" + __version__
|
|
index_pages = ("index.html", "index.htm")
|
|
extensions_map = _encodings_map_default = {
|
|
'.gz': 'application/gzip',
|
|
'.Z': 'application/octet-stream',
|
|
'.bz2': 'application/x-bzip2',
|
|
'.xz': 'application/x-xz',
|
|
}
|
|
|
|
def __init__(self, *args, directory=None, **kwargs):
|
|
if directory is None:
|
|
directory = os.getcwd()
|
|
self.directory = os.fspath(directory)
|
|
super().__init__(*args, **kwargs)
|
|
|
|
def do_GET(self):
|
|
"""Serve a GET request."""
|
|
f = self.send_head()
|
|
if f:
|
|
try:
|
|
self.copyfile(f, self.wfile)
|
|
finally:
|
|
f.close()
|
|
|
|
def do_HEAD(self):
|
|
"""Serve a HEAD request."""
|
|
f = self.send_head()
|
|
if f:
|
|
f.close()
|
|
|
|
def send_head(self):
|
|
"""Common code for GET and HEAD commands.
|
|
|
|
This sends the response code and MIME headers.
|
|
|
|
Return value is either a file object (which has to be copied
|
|
to the outputfile by the caller unless the command was HEAD,
|
|
and must be closed by the caller under all circumstances), or
|
|
None, in which case the caller has nothing further to do.
|
|
|
|
"""
|
|
path = self.translate_path(self.path)
|
|
f = None
|
|
if os.path.isdir(path):
|
|
parts = urllib.parse.urlsplit(self.path)
|
|
if not parts.path.endswith(('/', '%2f', '%2F')):
|
|
# redirect browser - doing basically what apache does
|
|
self.send_response(HTTPStatus.MOVED_PERMANENTLY)
|
|
new_parts = (parts[0], parts[1], parts[2] + '/',
|
|
parts[3], parts[4])
|
|
new_url = urllib.parse.urlunsplit(new_parts)
|
|
self.send_header("Location", new_url)
|
|
self.send_header("Content-Length", "0")
|
|
self.end_headers()
|
|
return None
|
|
for index in self.index_pages:
|
|
index = os.path.join(path, index)
|
|
if os.path.isfile(index):
|
|
path = index
|
|
break
|
|
else:
|
|
return self.list_directory(path)
|
|
ctype = self.guess_type(path)
|
|
# check for trailing "/" which should return 404. See Issue17324
|
|
# The test for this was added in test_httpserver.py
|
|
# However, some OS platforms accept a trailingSlash as a filename
|
|
# See discussion on python-dev and Issue34711 regarding
|
|
# parsing and rejection of filenames with a trailing slash
|
|
if path.endswith("/"):
|
|
self.send_error(HTTPStatus.NOT_FOUND, "File not found")
|
|
return None
|
|
try:
|
|
f = open(path, 'rb')
|
|
except OSError:
|
|
self.send_error(HTTPStatus.NOT_FOUND, "File not found")
|
|
return None
|
|
|
|
try:
|
|
fs = os.fstat(f.fileno())
|
|
# Use browser cache if possible
|
|
if ("If-Modified-Since" in self.headers
|
|
and "If-None-Match" not in self.headers):
|
|
# compare If-Modified-Since and time of last file modification
|
|
try:
|
|
ims = email.utils.parsedate_to_datetime(
|
|
self.headers["If-Modified-Since"])
|
|
except (TypeError, IndexError, OverflowError, ValueError):
|
|
# ignore ill-formed values
|
|
pass
|
|
else:
|
|
if ims.tzinfo is None:
|
|
# obsolete format with no timezone, cf.
|
|
# https://tools.ietf.org/html/rfc7231#section-7.1.1.1
|
|
ims = ims.replace(tzinfo=datetime.timezone.utc)
|
|
if ims.tzinfo is datetime.timezone.utc:
|
|
# compare to UTC datetime of last modification
|
|
last_modif = datetime.datetime.fromtimestamp(
|
|
fs.st_mtime, datetime.timezone.utc)
|
|
# remove microseconds, like in If-Modified-Since
|
|
last_modif = last_modif.replace(microsecond=0)
|
|
|
|
if last_modif <= ims:
|
|
self.send_response(HTTPStatus.NOT_MODIFIED)
|
|
self.end_headers()
|
|
f.close()
|
|
return None
|
|
|
|
self.send_response(HTTPStatus.OK)
|
|
self.send_header("Content-type", ctype)
|
|
self.send_header("Content-Length", str(fs[6]))
|
|
self.send_header("Last-Modified",
|
|
self.date_time_string(fs.st_mtime))
|
|
self.end_headers()
|
|
return f
|
|
except:
|
|
f.close()
|
|
raise
|
|
|
|
def list_directory(self, path):
|
|
"""Helper to produce a directory listing (absent index.html).
|
|
|
|
Return value is either a file object, or None (indicating an
|
|
error). In either case, the headers are sent, making the
|
|
interface the same as for send_head().
|
|
|
|
"""
|
|
try:
|
|
list = os.listdir(path)
|
|
except OSError:
|
|
self.send_error(
|
|
HTTPStatus.NOT_FOUND,
|
|
"No permission to list directory")
|
|
return None
|
|
list.sort(key=lambda a: a.lower())
|
|
r = []
|
|
displaypath = self.path
|
|
displaypath = displaypath.split('#', 1)[0]
|
|
displaypath = displaypath.split('?', 1)[0]
|
|
try:
|
|
displaypath = urllib.parse.unquote(displaypath,
|
|
errors='surrogatepass')
|
|
except UnicodeDecodeError:
|
|
displaypath = urllib.parse.unquote(displaypath)
|
|
displaypath = html.escape(displaypath, quote=False)
|
|
enc = sys.getfilesystemencoding()
|
|
title = f'Directory listing for {displaypath}'
|
|
r.append('<!DOCTYPE HTML>')
|
|
r.append('<html lang="en">')
|
|
r.append('<head>')
|
|
r.append(f'<meta charset="{enc}">')
|
|
r.append('<style type="text/css">\n:root {\ncolor-scheme: light dark;\n}\n</style>')
|
|
r.append(f'<title>{title}</title>\n</head>')
|
|
r.append(f'<body>\n<h1>{title}</h1>')
|
|
r.append('<hr>\n<ul>')
|
|
for name in list:
|
|
fullname = os.path.join(path, name)
|
|
displayname = linkname = name
|
|
# Append / for directories or @ for symbolic links
|
|
if os.path.isdir(fullname):
|
|
displayname = name + "/"
|
|
linkname = name + "/"
|
|
if os.path.islink(fullname):
|
|
displayname = name + "@"
|
|
# Note: a link to a directory displays with @ and links with /
|
|
r.append('<li><a href="%s">%s</a></li>'
|
|
% (urllib.parse.quote(linkname,
|
|
errors='surrogatepass'),
|
|
html.escape(displayname, quote=False)))
|
|
r.append('</ul>\n<hr>\n</body>\n</html>\n')
|
|
encoded = '\n'.join(r).encode(enc, 'surrogateescape')
|
|
f = io.BytesIO()
|
|
f.write(encoded)
|
|
f.seek(0)
|
|
self.send_response(HTTPStatus.OK)
|
|
self.send_header("Content-type", "text/html; charset=%s" % enc)
|
|
self.send_header("Content-Length", str(len(encoded)))
|
|
self.end_headers()
|
|
return f
|
|
|
|
def translate_path(self, path):
|
|
"""Translate a /-separated PATH to the local filename syntax.
|
|
|
|
Components that mean special things to the local file system
|
|
(e.g. drive or directory names) are ignored. (XXX They should
|
|
probably be diagnosed.)
|
|
|
|
"""
|
|
# abandon query parameters
|
|
path = path.split('#', 1)[0]
|
|
path = path.split('?', 1)[0]
|
|
# Don't forget explicit trailing slash when normalizing. Issue17324
|
|
try:
|
|
path = urllib.parse.unquote(path, errors='surrogatepass')
|
|
except UnicodeDecodeError:
|
|
path = urllib.parse.unquote(path)
|
|
trailing_slash = path.endswith('/')
|
|
path = posixpath.normpath(path)
|
|
words = path.split('/')
|
|
words = filter(None, words)
|
|
path = self.directory
|
|
for word in words:
|
|
if os.path.dirname(word) or word in (os.curdir, os.pardir):
|
|
# Ignore components that are not a simple file/directory name
|
|
continue
|
|
path = os.path.join(path, word)
|
|
if trailing_slash:
|
|
path += '/'
|
|
return path
|
|
|
|
def copyfile(self, source, outputfile):
|
|
"""Copy all data between two file objects.
|
|
|
|
The SOURCE argument is a file object open for reading
|
|
(or anything with a read() method) and the DESTINATION
|
|
argument is a file object open for writing (or
|
|
anything with a write() method).
|
|
|
|
The only reason for overriding this would be to change
|
|
the block size or perhaps to replace newlines by CRLF
|
|
-- note however that this the default server uses this
|
|
to copy binary data as well.
|
|
|
|
"""
|
|
shutil.copyfileobj(source, outputfile)
|
|
|
|
def guess_type(self, path):
|
|
"""Guess the type of a file.
|
|
|
|
Argument is a PATH (a filename).
|
|
|
|
Return value is a string of the form type/subtype,
|
|
usable for a MIME Content-type header.
|
|
|
|
The default implementation looks the file's extension
|
|
up in the table self.extensions_map, using application/octet-stream
|
|
as a default; however it would be permissible (if
|
|
slow) to look inside the data to make a better guess.
|
|
|
|
"""
|
|
base, ext = posixpath.splitext(path)
|
|
if ext in self.extensions_map:
|
|
return self.extensions_map[ext]
|
|
ext = ext.lower()
|
|
if ext in self.extensions_map:
|
|
return self.extensions_map[ext]
|
|
guess, _ = mimetypes.guess_file_type(path)
|
|
if guess:
|
|
return guess
|
|
return 'application/octet-stream'
|
|
|
|
|
|
nobody = None
|
|
|
|
def nobody_uid():
|
|
"""Internal routine to get nobody's uid"""
|
|
global nobody
|
|
if nobody:
|
|
return nobody
|
|
try:
|
|
import pwd
|
|
except ImportError:
|
|
return -1
|
|
try:
|
|
nobody = pwd.getpwnam('nobody')[2]
|
|
except KeyError:
|
|
nobody = 1 + max(x[2] for x in pwd.getpwall())
|
|
return nobody
|
|
|
|
|
|
def executable(path):
|
|
"""Test for executable file."""
|
|
return os.access(path, os.X_OK)
|
|
|
|
|
|
def _get_best_family(*address):
|
|
infos = socket.getaddrinfo(
|
|
*address,
|
|
type=socket.SOCK_STREAM,
|
|
flags=socket.AI_PASSIVE,
|
|
)
|
|
family, type, proto, canonname, sockaddr = next(iter(infos))
|
|
return family, sockaddr
|
|
|
|
|
|
def test(HandlerClass=BaseHTTPRequestHandler,
|
|
ServerClass=ThreadingHTTPServer,
|
|
protocol="HTTP/1.0", port=8000, bind=None,
|
|
tls_cert=None, tls_key=None, tls_password=None):
|
|
"""Test the HTTP request handler class.
|
|
|
|
This runs an HTTP server on port 8000 (or the port argument).
|
|
|
|
"""
|
|
ServerClass.address_family, addr = _get_best_family(bind, port)
|
|
HandlerClass.protocol_version = protocol
|
|
|
|
if tls_cert:
|
|
server = ServerClass(addr, HandlerClass, certfile=tls_cert,
|
|
keyfile=tls_key, password=tls_password)
|
|
else:
|
|
server = ServerClass(addr, HandlerClass)
|
|
|
|
with server as httpd:
|
|
host, port = httpd.socket.getsockname()[:2]
|
|
url_host = f'[{host}]' if ':' in host else host
|
|
protocol = 'HTTPS' if tls_cert else 'HTTP'
|
|
print(
|
|
f"Serving {protocol} on {host} port {port} "
|
|
f"({protocol.lower()}://{url_host}:{port}/) ..."
|
|
)
|
|
try:
|
|
httpd.serve_forever()
|
|
except KeyboardInterrupt:
|
|
print("\nKeyboard interrupt received, exiting.")
|
|
sys.exit(0)
|
|
|
|
|
|
def _main(args=None):
|
|
import argparse
|
|
import contextlib
|
|
|
|
parser = argparse.ArgumentParser(color=True)
|
|
parser.add_argument('-b', '--bind', metavar='ADDRESS',
|
|
help='bind to this address '
|
|
'(default: all interfaces)')
|
|
parser.add_argument('-d', '--directory', default=os.getcwd(),
|
|
help='serve this directory '
|
|
'(default: current directory)')
|
|
parser.add_argument('-p', '--protocol', metavar='VERSION',
|
|
default='HTTP/1.0',
|
|
help='conform to this HTTP version '
|
|
'(default: %(default)s)')
|
|
parser.add_argument('--tls-cert', metavar='PATH',
|
|
help='path to the TLS certificate chain file')
|
|
parser.add_argument('--tls-key', metavar='PATH',
|
|
help='path to the TLS key file')
|
|
parser.add_argument('--tls-password-file', metavar='PATH',
|
|
help='path to the password file for the TLS key')
|
|
parser.add_argument('port', default=8000, type=int, nargs='?',
|
|
help='bind to this port '
|
|
'(default: %(default)s)')
|
|
args = parser.parse_args(args)
|
|
|
|
if not args.tls_cert and args.tls_key:
|
|
parser.error("--tls-key requires --tls-cert to be set")
|
|
|
|
tls_key_password = None
|
|
if args.tls_password_file:
|
|
if not args.tls_cert:
|
|
parser.error("--tls-password-file requires --tls-cert to be set")
|
|
|
|
try:
|
|
with open(args.tls_password_file, "r", encoding="utf-8") as f:
|
|
tls_key_password = f.read().strip()
|
|
except OSError as e:
|
|
parser.error(f"Failed to read TLS password file: {e}")
|
|
|
|
# ensure dual-stack is not disabled; ref #38907
|
|
class DualStackServerMixin:
|
|
|
|
def server_bind(self):
|
|
# suppress exception when protocol is IPv4
|
|
with contextlib.suppress(Exception):
|
|
self.socket.setsockopt(
|
|
socket.IPPROTO_IPV6, socket.IPV6_V6ONLY, 0)
|
|
return super().server_bind()
|
|
|
|
def finish_request(self, request, client_address):
|
|
self.RequestHandlerClass(request, client_address, self,
|
|
directory=args.directory)
|
|
|
|
class HTTPDualStackServer(DualStackServerMixin, ThreadingHTTPServer):
|
|
pass
|
|
class HTTPSDualStackServer(DualStackServerMixin, ThreadingHTTPSServer):
|
|
pass
|
|
|
|
ServerClass = HTTPSDualStackServer if args.tls_cert else HTTPDualStackServer
|
|
|
|
test(
|
|
HandlerClass=SimpleHTTPRequestHandler,
|
|
ServerClass=ServerClass,
|
|
port=args.port,
|
|
bind=args.bind,
|
|
protocol=args.protocol,
|
|
tls_cert=args.tls_cert,
|
|
tls_key=args.tls_key,
|
|
tls_password=tls_key_password,
|
|
)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
_main()
|