如何在twisted.web中完成不吮吸的文件上传？

from twisted.web import resource, server, client
from twisted.internet import defer

class FileUploadResource(resource.Resource):
    isLeaf = True

    def render_POST(self, request):
        content = request.getContent()
        d = self.uploadFile(content)
        d.addCallback(self.handleResponse, request)
        d.addErrback(self.handleError, request)
        return server.NOT_DONE_YET

    def uploadFile(self, content):
        # 设置目标服务器的URL
        url = "http://example.com/upload"
        # 设置请求头部
        headers = {
            "Content-Type": "multipart/form-data"
        }
        # 发送POST请求
        d = client.Agent().request(
            b"POST",
            url.encode(),
            headers=headers,
            bodyProducer=client.FileBodyProducer(content)
        )
        return d

    def handleResponse(self, response, request):
        # 处理目标服务器的响应
        # 可以根据需要进行相应的处理，例如返回上传成功的消息
        request.write(b"Upload successful")
        request.finish()

    def handleError(self, failure, request):
        # 处理请求发送或目标服务器响应错误的情况
        # 可以根据需要进行相应的错误处理
        request.setResponseCode(500)
        request.write(b"Upload failed")
        request.finish()

# 创建一个Site并启动服务
site = server.Site(FileUploadResource())
reactor.listenTCP(8080, site)
reactor.run()