[New-bugs-announce] [issue25037] ValueError: invalid literal for int() with base 16: b'[\r\n'

[Alan]

New submission from Alan:

I've written a piece of code to POST request to a web service. 

===========================================================================

import json
import urllib
from urllib import request
from urllib import parse

def Payload(start_date, end_date, pnode_list):
    payload = {"startDate": start_date, 
               "endDate": end_date,
               "pnodelist": pnode_list}
    return json.dumps(payload)

def DownloadData(url, payload, header):
    data = []
    request = urllib.request.Request(url, payload, header)
    try:
        response = urllib.request.urlopen(request)
    except urllib.error.URLError as e:
        print("URLError occured.")
    except urllib.error.HTTPError as e:
        print("HTTPError occured.")
    else:
        #response.chunked = False  #if this line is commented, ValueError                    will be thrown...
        data = json.loads(response.read().decode("utf-8"))
    return data

def main():
    url = "https://dataminer.pjm.com/dataminer/rest/public/api/markets/dayahead/lmp/daily"
    payload = Payload("2015-07-01", "2015-07-01", [135389795])
    header = {"Content-Type": "application/json"}
    data = DownloadData(url, payload.encode("utf-8"), header)
    print(data)

if __name__ == "__main__":
    main()

===========================================================================

However, "ValueError:invalid literal for int() with base 16: b'[\r\n'" is thrown when the HTTPResponse.read() is invoked:

Traceback (most recent call last):
  File "C:\Python34\lib\http\client.py", line 587, in _readall_chunked
    chunk_left = self._read_next_chunk_size()
  File "C:\Python34\lib\http\client.py", line 559, in _read_next_chunk_si
    return int(line, 16)
ValueError: invalid literal for int() with base 16: b'[\r\n'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "textpjm.py", line 34, in <module>
    main()
  File "textpjm.py", line 30, in main
    data = DownloadData(url, payload.encode("utf-8"), header)
  File "textpjm.py", line 23, in DownloadData
    data = json.loads(response.read().decode("utf-8"))
  File "C:\Python34\lib\http\client.py", line 506, in read
    return self._readall_chunked()
  File "C:\Python34\lib\http\client.py", line 591, in _readall_chunked
    raise IncompleteRead(b''.join(value))
http.client.IncompleteRead: IncompleteRead(0 bytes read)


I've found a solution to avoid this exception: before HTTPResponse.read() is called, I have to set HTTPResponse.chunked to be False!

I wonder if there's something wrong in HTTPResponse.

----------
components: Library (Lib)
files: testpjm.py
messages: 250275
nosy: alan
priority: normal
severity: normal
status: open
title: ValueError: invalid literal for int() with base 16: b'[\r\n'
type: crash
versions: Python 3.4
Added file: http://bugs.python.org/file40416/testpjm.py

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue25037>
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