Question

我在esp32板上有一个micropython客户端，在linux服务器上有Python。我正在尝试从Python Server向MicroPython客户端发送5.5kb文本文件。它成功发送但MicroPython客户端不接收所有数据。代码如下;

Python服务器：

with open('downloads/%s' % (request_path), 'rb') as f:
    data = f.read()
self.wfile.write(data) #data is 5.5kb

MicroPython客户端

recvData = sock.read(4096).decode('utf-8').split("\r\n")
print("Response_Received:: %s" % recvData) 
sock.close()

Response_Received:: ['HTTP/1.0 200 OK', 'Server: SimpleHTTP/0.6 Python/3.5.3', 'Date: Sat, 09 Jun 2018 09:29:41 GMT', '', '# Ity: asdasd\n# ksduygfkhsgdkjfksjdhfg\n                kjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy98\n                47y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhs\n                gdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349rio\n                t34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r3\n                49riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkv\n                nvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogijiksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweu\n                oiruy9847y397r349riot34jt;o\n                giji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbs\n                djkvbjcxbvhweioufhoiweuoiruy9847y397\n                r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufh\n                oiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduyg\n                fkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhwei\n                oufhoiweuoiruy9847y397r349riot\n                34jt;ogiji4vuijo4vjlkvnvl;kksduyg\n                fkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhw\n                eioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjd\n                hfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiwe\n                uoiruy9847y397r349riot34jt;ogiji4vuij\n                o4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhwe\n                ioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfk\n                hsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;o\n                giji4vuijo4vjlkvnvl;kksduygfkhsgdk\n                jfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvh\n                weioufhoiweuoiruy9847y397r349riot34jt;ogiji\n                4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiru\n                y9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;k4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduyg\n                fkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcx\n                bvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhs\n                gdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdj\n                nvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogijiksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9bfkjcbsdjkvbjcxbvhweioufhoi847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweu\nnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogijiksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweu\nnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogijiksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufhoiweuoiruy9847y397r349riot34jt;ogiji4vuijo4vjlkvnvl;kksduygfkhsgdkjfksjdhfgkjdhsbfkjdhsbfkjcbsdjkvbjcxbvhweioufnvl;k']

由于缓冲区大小（4096），客户端仅接收4140字节的数组数据，recvData的第4个元素丢失。 MicroPython不接受此缓冲区大小。如何在recvData数组的第4个元素中接收所有数据（5.5kb）而不会有任何损失？

我试图对收到的数据进行分段，但没有成功。

while True: 
    chunck = s.recv(4096)
    if not chunck: 
        break
    fragments.append(chunck)

Answer 1

由于您的目标是将文件写入文件系统，因此最简单的解决方案是停止尝试将整个文件保存在内存中。不要构建您的fragments数组，只需将收到的块写入文件：

with open('datafile', 'w') as fd:
  while True: 
      chunk = s.recv(4096)
      if not chunk: 
          break
      fd.write(chunk)

这需要恒定的内存量并可用于接收任意大小的文件。

MicroPython客户端不会从Python Server接收大于4kb（4096字节）的文本文件

1 个答案: