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改造python3中的http.server为简单的文件上传下载服务

news 2025/8/20 21:05:55

改造

修改python3中的http.server.SimpleHTTPRequestHandler，实现简单的文件上传下载服务

simple_http_file_server.py：

# !/usr/bin/env python3import datetime
import email
import html
import http.server
import io
import mimetypes
import os
import posixpath
import re
import shutil
import sys
import urllib.error
import urllib.parse
import urllib.request
import socket
from http import HTTPStatus
import threading
import contextlib__version__ = "0.1"
__all__ = ["MySimpleHTTPRequestHandler"]class MySimpleHTTPRequestHandler(http.server.BaseHTTPRequestHandler):server_version = "SimpleHTTP/" + __version__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):f = self.send_head()if f:try:self.copyfile(f, self.wfile)finally:f.close()def do_HEAD(self):f = self.send_head()if f:f.close()def send_head(self):path = self.translate_path(self.path)f = Noneif os.path.isdir(path):parts = urllib.parse.urlsplit(self.path)if not parts.path.endswith('/'):# redirect browser - doing basically what apache doesself.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.end_headers()return Nonefor index in "index.html", "index.htm":index = os.path.join(path, index)if os.path.exists(index):path = indexbreakelse:return self.list_directory(path)ctype = self.guess_type(path)if path.endswith("/"):self.send_error(HTTPStatus.NOT_FOUND, "File not found")return Nonetry:f = open(path, 'rb')except OSError:self.send_error(HTTPStatus.NOT_FOUND, "File not found")return Nonetry:fs = os.fstat(f.fileno())# Use browser cache if possibleif ("If-Modified-Since" in self.headersand "If-None-Match" not in self.headers):# compare If-Modified-Since and time of last file modificationtry:ims = email.utils.parsedate_to_datetime(self.headers["If-Modified-Since"])except (TypeError, IndexError, OverflowError, ValueError):# ignore ill-formed valuespasselse:if ims.tzinfo is None:# obsolete format with no timezone, cf.# https://tools.ietf.org/html/rfc7231#section-7.1.1.1ims = ims.replace(tzinfo=datetime.timezone.utc)if ims.tzinfo is datetime.timezone.utc:# compare to UTC datetime of last modificationlast_modif = datetime.datetime.fromtimestamp(fs.st_mtime, datetime.timezone.utc)# remove microseconds, like in If-Modified-Sincelast_modif = last_modif.replace(microsecond=0)if last_modif <= ims:self.send_response(HTTPStatus.NOT_MODIFIED)self.end_headers()f.close()return Noneself.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 fexcept:f.close()raisedef list_directory(self, path):try:list_dir = os.listdir(path)except OSError:self.send_error(HTTPStatus.NOT_FOUND, "No permission to list_dir directory")return Nonelist_dir.sort(key=lambda a: a.lower())r = []try:display_path = urllib.parse.unquote(self.path, errors='surrogatepass')except UnicodeDecodeError:display_path = urllib.parse.unquote(path)display_path = html.escape(display_path, quote=False)enc = sys.getfilesystemencoding()form = """<h1>文件上传</h1>\n<form ENCTYPE="multipart/form-data" method="post">\n<input name="file" type="file"/>\n<input type="submit" value="upload"/>\n</form>\n"""title = 'Directory listing for %s' % display_pathr.append('<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" ''"http://www.w3.org/TR/html4/strict.dtd">')r.append('<html>\n<head>')r.append('<meta http-equiv="Content-Type" ''content="text/html; charset=%s">' % enc)r.append('<title>%s</title>\n</head>' % title)r.append('<body>%s\n<h1>%s</h1>' % (form, title))r.append('<hr>\n<ul>')for name in list_dir:fullname = os.path.join(path, name)displayname = linkname = name# Append / for directories or @ for symbolic linksif 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, 'surrogate escape')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 fdef translate_path(self, path):# abandon query parameterspath = path.split('?', 1)[0]path = path.split('#', 1)[0]# Don't forget explicit trailing slash when normalizing. Issue17324trailing_slash = path.rstrip().endswith('/')try:path = urllib.parse.unquote(path, errors='surrogatepass')except UnicodeDecodeError:path = urllib.parse.unquote(path)path = posixpath.normpath(path)words = path.split('/')words = filter(None, words)path = self.directoryfor word in words:if os.path.dirname(word) or word in (os.curdir, os.pardir):# Ignore components that are not a simple file/directory namecontinuepath = os.path.join(path, word)if trailing_slash:path += '/'return pathdef copyfile(self, source, outputfile):shutil.copyfileobj(source, outputfile)def guess_type(self, path):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_type(path)if guess:return guessreturn 'application/octet-stream'def do_POST(self):r, info = self.deal_post_data()self.log_message('%s, %s => %s' % (r, info, self.client_address))enc = sys.getfilesystemencoding()res = ['<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" ''"http://www.w3.org/TR/html4/strict.dtd">','<html>\n<head>','<meta http-equiv="Content-Type" content="text/html; charset=%s">' % enc,'<title>%s</title>\n</head>' % "Upload Result Page",'<body><h1>%s</h1>\n' % "Upload Result"]if r:res.append('<p>SUCCESS: %s</p>\n' % info)else:res.append('<p>FAILURE: %s</p>' % info)res.append('<a href=\"%s\">back</a>' % self.headers['referer'])res.append('</body></html>')encoded = '\n'.join(res).encode(enc, 'surrogate escape')f = io.BytesIO()f.write(encoded)length = f.tell()f.seek(0)self.send_response(200)self.send_header("Content-type", "text/html")self.send_header("Content-Length", str(length))self.end_headers()if f:self.copyfile(f, self.wfile)f.close()def deal_post_data(self):content_type = self.headers['content-type']if not content_type:return False, "Content-Type header doesn't contain boundary"boundary = content_type.split("=")[1].encode()remain_bytes = int(self.headers['content-length'])line = self.rfile.readline()remain_bytes -= len(line)if boundary not in line:return False, "Content NOT begin with boundary"line = self.rfile.readline()remain_bytes -= len(line)fn = re.findall(r'Content-Disposition.*name="file"; filename="(.*)"', line.decode())if not fn:return False, "Can't find out file name..."path = self.translate_path(self.path)fn = os.path.join(path, fn[0])line = self.rfile.readline()remain_bytes -= len(line)line = self.rfile.readline()remain_bytes -= len(line)try:out = open(fn, 'wb')except IOError:return False, "Can't create file to write, do you have permission to write?"preline = self.rfile.readline()remain_bytes -= len(preline)while remain_bytes > 0:line = self.rfile.readline()remain_bytes -= len(line)if boundary in line:preline = preline[0:-1]if preline.endswith(b'\r'):preline = preline[0:-1]out.write(preline)out.close()return True, "File '%s' upload success!" % fnelse:out.write(preline)preline = linereturn False, "Unexpect Ends of data."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, sockaddrdef serve_forever(port=8000, bind=None, directory="."):"""This runs an HTTP server on port 8000 (or the port argument)."""# ensure dual-stack is not disabled; ref #38907class DualStackServer(http.server.ThreadingHTTPServer):def server_bind(self):# suppress exception when protocol is IPv4with 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=directory)HandlerClass=MySimpleHTTPRequestHandlerServerClass=DualStackServerprotocol="HTTP/1.0"ServerClass.address_family, addr = _get_best_family(bind, port)HandlerClass.protocol_version = protocolwith ServerClass(addr, HandlerClass) as httpd:host, port = httpd.socket.getsockname()[:2]url_host = f'[{host}]' if ':' in host else hostprint(f"Serving HTTP on {host} port {port} "f"(http://{url_host}:{port}/) ...")try:httpd.serve_forever()except KeyboardInterrupt:print("\nKeyboard interrupt received, exiting.")sys.exit(0)if __name__ == '__main__':import argparseparser = argparse.ArgumentParser()parser.add_argument('--bind', '-b', metavar='ADDRESS',help='specify alternate bind address ''(default: all interfaces)')parser.add_argument('--directory', '-d', default=os.getcwd(),help='specify alternate directory ''(default: current directory)')parser.add_argument('port', action='store', default=8000, type=int,nargs='?',help='specify alternate port (default: 8000)')args = parser.parse_args()# 在主线程中执行# serve_forever(# 	port=args.port,# 	bind=args.bind,#	directory = args.directory# )# 在子线程中执行，这样主线程可以执行异步工作thread1 = threading.Thread(name='t1',target= serve_forever,kwargs={"port" : args.port,"bind" : args.bind,"directory" : args.directory})thread1.start()# thread1.join()

使用帮助：

>python3 simple_http_file_server.py --help
usage: simple_http_file_server.py [-h] [--cgi] [--bind ADDRESS] [--directory DIRECTORY] [port]

positional arguments:
port specify alternate port (default: 8000)

optional arguments:
-h, --help show this help message and exit
--cgi run as CGI server
--bind ADDRESS, -b ADDRESS
specify alternate bind address (default: all interfaces)
--directory DIRECTORY, -d DIRECTORY
specify alternate directory (default: current directory)

使用示例：

>python3 simple_http_file_server.py -d ~ 12345
Serving HTTP on :: port 12345 (http://[::]:12345/) ...
::ffff:127.0.0.1 - - [30/Nov/2023 09:35:06] "GET / HTTP/1.1" 200 -

。。。