New submission from Manuel <manuel.bass...@greenorange.it>:
I'm implementing an HTTPServer class that produces a response with transfer-encoding chunked mode. I'm sending the chunks as described in https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Transfer-Encoding#chunked_encoding If I send chunks of length <= 9 bytes the message is received correctly by the client, otherwise when sending chunks of length >= 10 bytes, it seems that some of them are not received and the message remains stuck in the client waiting indefinitely In attachment an example of the complete code to reproduce the issue, but in short, the following code: # writing 5 chunks of length 10 for i in range(5): text = str(i+1) * 10 # concatenate 10 chars chunk = '{0:d}\r\n'.format(len(text)) + text + '\r\n' self.wfile.write(chunk.encode(encoding='utf-8')) # writing close sequence close_chunk = '0\r\n\r\n' self.wfile.write(close_chunk.encode(encoding='utf-8')) Produces: 10\r\n 1111111111\r\n 10\r\n 2222222222\r\n 10\r\n 3333333333\r\n 10\r\n 4444444444\r\n 10\r\n 5555555555\r\n 0\r\n \r\n In this case the client hangs several minutes without a response But if I use length 9 or less instead for example with text = str(i+1) * 9 the client receives the correct body and the communication ends correctly (in about 6ms) The problem persists with both http.server.ThreadingHTTPServer and http.server.HTTPServer I tried also passing the body as an hard-coded binary string some version informations: Python 3.9.2 HTTP Client used: Postman 8.10, curl, Chrome Thanks a lot for any help Manuel ---------- files: myserver.py messages: 404300 nosy: manuel_b priority: normal severity: normal status: open title: Python3 ThreadingHTTPServer fails to send chunked encoded response type: behavior versions: Python 3.9 Added file: https://bugs.python.org/file50369/myserver.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45523> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
