你在那里使用的代码很糟糕（例如，看看global rootnode，其中使用了名称rootnode无处——显然是半编辑的源代码，而且很糟糕)。
无论如何，POST 使用“客户端”的形式是什么？ upfile 字段是如何设置的？
您为什么不使用Python's docs 中记录的普通FieldStorage 方法？这样，您可以使用相应字段的.file 属性来获取要读取的类文件对象，或者使用其.value 属性将其全部读取到内存中并将其作为字符串获取，再加上.filename 属性的字段知道上传文件的名称。 FieldStorage 上的更详细但简洁的文档是 here。
编辑：既然 OP 已经编辑了 Q 来澄清，我看到了问题：BaseHTTPServer 确实 不 根据 CGI 规范设置环境，所以cgi 模块不太适用。不幸的是，唯一简单的环境设置方法是从CGIHTTPServer.py 窃取和破解一大段代码（不打算重用，因此需要、叹息、复制和粘贴编码），例如......：
def populenv(self):
path = self.path
dir, rest = '.', 'ciao'
# find an explicit query string, if present.
i = rest.rfind('?')
if i >= 0:
rest, query = rest[:i], rest[i+1:]
else:
query = ''
# dissect the part after the directory name into a script name &
# a possible additional path, to be stored in PATH_INFO.
i = rest.find('/')
if i >= 0:
script, rest = rest[:i], rest[i:]
else:
script, rest = rest, ''
# Reference: http://hoohoo.ncsa.uiuc.edu/cgi/env.html
# XXX Much of the following could be prepared ahead of time!
env = {}
env['SERVER_SOFTWARE'] = self.version_string()
env['SERVER_NAME'] = self.server.server_name
env['GATEWAY_INTERFACE'] = 'CGI/1.1'
env['SERVER_PROTOCOL'] = self.protocol_version
env['SERVER_PORT'] = str(self.server.server_port)
env['REQUEST_METHOD'] = self.command
uqrest = urllib.unquote(rest)
env['PATH_INFO'] = uqrest
env['SCRIPT_NAME'] = 'ciao'
if query:
env['QUERY_STRING'] = query
host = self.address_string()
if host != self.client_address[0]:
env['REMOTE_HOST'] = host
env['REMOTE_ADDR'] = self.client_address[0]
authorization = self.headers.getheader("authorization")
if authorization:
authorization = authorization.split()
if len(authorization) == 2:
import base64, binascii
env['AUTH_TYPE'] = authorization[0]
if authorization[0].lower() == "basic":
try:
authorization = base64.decodestring(authorization[1])
except binascii.Error:
pass
else:
authorization = authorization.split(':')
if len(authorization) == 2:
env['REMOTE_USER'] = authorization[0]
# XXX REMOTE_IDENT
if self.headers.typeheader is None:
env['CONTENT_TYPE'] = self.headers.type
else:
env['CONTENT_TYPE'] = self.headers.typeheader
length = self.headers.getheader('content-length')
if length:
env['CONTENT_LENGTH'] = length
referer = self.headers.getheader('referer')
if referer:
env['HTTP_REFERER'] = referer
accept = []
for line in self.headers.getallmatchingheaders('accept'):
if line[:1] in "\t\n\r ":
accept.append(line.strip())
else:
accept = accept + line[7:].split(',')
env['HTTP_ACCEPT'] = ','.join(accept)
ua = self.headers.getheader('user-agent')
if ua:
env['HTTP_USER_AGENT'] = ua
co = filter(None, self.headers.getheaders('cookie'))
if co:
env['HTTP_COOKIE'] = ', '.join(co)
# XXX Other HTTP_* headers
# Since we're setting the env in the parent, provide empty
# values to override previously set values
for k in ('QUERY_STRING', 'REMOTE_HOST', 'CONTENT_LENGTH',
'HTTP_USER_AGENT', 'HTTP_COOKIE', 'HTTP_REFERER'):
env.setdefault(k, "")
os.environ.update(env)
这可以进一步大大简化，但不能不花一些时间和精力在该任务上：-(。
有了这个populenv函数，我们可以重新编码：
def do_POST(self):
populen(self)
form = cgi.FieldStorage(fp=self.rfile)
upfilecontent = form['upfile'].value
if upfilecontent:
fout = open(os.path.join('tmp', form['upfile'].filename), 'wb')
fout.write(upfilecontent)
fout.close()
self.do_GET()
...从此过上幸福的生活；-)。 （当然，使用任何像样的 WSGI 服务器，甚至 the demo one 都会容易得多，但是这个练习对 CGI 及其内部结构很有启发性；-)。