pycurl webhook breaks incoming data

Question

I´m using pycurl to hook incoming data from a LAN-based device to a function.

The hook works well in the sense that the function receives the data, but it´s only getting a part of the complete packet each time.

For instance, if the received data totals 4000 bytes, I get 1500, 1400 and 1100 bytes in three different consecutive calls to my hook function.

Is there a setting to adjust max data length, or receiving timeout, that I could be missing?

Here´s my pycurl inicialization:

  CurlObj = pycurl.Curl()
  MyDevice.CurlObj = CurlObj

  CurlObj.setopt(pycurl.URL, Url)
  CurlObj.setopt(pycurl.CONNECTTIMEOUT, 60)
  CurlObj.setopt(pycurl.TCP_KEEPALIVE, 1)
  CurlObj.setopt(pycurl.TCP_KEEPIDLE, 30)
  CurlObj.setopt(pycurl.TCP_KEEPINTVL, 45)
  CurlObj.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_DIGEST)
  CurlObj.setopt(pycurl.USERPWD, "user:pass")

  CurlObj.setopt(pycurl.WRITEFUNCTION, MyDevice.OnReceive)

  self.CurlMultiObj.add_handle(CurlObj)

And this is the hook function:

  def OnReceive(self, data):
    
   Data = data.decode("utf-8", errors="ignore")

   ...process Data here...

I guess that I could get all the received data segments in a larger string and then process it (there´s some data length indication at the beginning of the packet) but I´d rather receive the whole packet in only one call to OnReceive.