On Tuesday, December 6, 2016 at 3:22:13 PM UTC+1, dr.rom...@gmail.com wrote:
> Hi,
>
> I'm facing strange Django broken pipe error (Python 2.7 on Ubuntu) that
> apparently is a not fixed Django bug. Does anybody now how to fix it? I've
> been searching a lot and didn't find any solution.
>
> This error happens very irregularly by Post request in Django. Sometimes it
> works sometimes not:
>
> [06/Dec/2016 13:33:57] "POST /export_report/ HTTP/1.1" 500 59
> Traceback (most recent call last):
> File "/usr/lib/python2.7/SocketServer.py", line 593, in
> process_request_thread
> self.finish_request(request, client_address)
> File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
> self.RequestHandlerClass(request, client_address, self)
> File
> "/home/ait/.virtualenvs/env1/local/lib/python2.7/site-packages/django/core/servers/basehttp.py",
> line 129, in __init__
> super(WSGIRequestHandler, self).__init__(*args, **kwargs)
> File "/usr/lib/python2.7/SocketServer.py", line 651, in __init__
> self.finish()
> File "/usr/lib/python2.7/SocketServer.py", line 710, in finish
> self.wfile.close()
> File "/usr/lib/python2.7/socket.py", line 279, in close
> self.flush()
> File "/usr/lib/python2.7/socket.py", line 303, in flush
> self._sock.sendall(view[write_offset:write_offset+buffer_size])
> error: [Errno 32] Broken pipe
> ----------------------------------------
> Exception happened during processing of request from ('127.0.0.1', 38224)
>
> It is also described in:
> https://www.reddit.com/r/joinmarket/comments/4atqrm/is_this_exception_normal_exception_happened/
>
> On https://bugs.python.org/issue14574 is stated that this error should
> already be fixed but apparently not.
>
> Best regards,
>
> Roman
Thank you Justin,
I'm on the dev server and should present results in this way.
Yes, I use manage.py runserver --insecure to start the server (from PyCharm).
My views.py call:
@detail_route(methods=['post'], permission_classes=[permissions.AllowAny])
def export_report(request):
body_unicode = request.body.decode('utf-8')
body_str = body_unicode.encode('ascii','ignore')
attr_list = body_str.split('&')
attr_dict = {}
if (len(attr_list) > 0):
for attr in attr_list:
...
key = key_value_pair[0]
attr_dict[key] = key_value_pair[1]
trend = trends.calculate_trend(
attr_dict['search_phrase']
, attr_dict['time_from']
, attr_dict['time_to']
, attr_dict['time_scale']
)
attr_dict['trend'] = trend
res = str(json.dumps(attr_dict))
return HttpResponse(res, content_type="text/plain; charset=utf-8")
and trend calculation in trends.py with database calls:
def calculate_trend(query_phrase, time_from, time_to, time_scale):
# check in database if trend already exists
try:
db_trend = Trend.objects.get(pk=query_phrase)
if db_trend.from_time.strftime("%Y-%m-%d") == time_from \
and db_trend.to_time.strftime("%Y-%m-%d") == time_to \
and db_trend.granularity == time_scale:
logger.info("trend already exists.")
existing_trend_dict = ast.literal_eval(db_trend.content)
return existing_trend_dict
except Trend.DoesNotExist:
logger.info("It is a new trend search.")
trend_dict = {}
start_time = pd.Timestamp(value[0])
end_time = pd.Timestamp(value[-1])
freq = ... get frequency using pandas lib
trend_dict[key] = freq
json_trend_content = trend_dict_to_sorted_json_str(trend_dict)
trend = Trend(
phrase=query_phrase,
content=json_trend_content,
from_time=time_from,
to_time=time_to,
granularity=time_scale,
)
if trend is not None:
try:
db_trend = Trend.objects.get(pk=query_phrase)
db_trend.delete()
logger.info("delete old trend: %s. " % trend)
except Trend.DoesNotExist:
logger.info("create trend: %s. " % trend)
trend.save()
return trend_dict
Thank you in advance!
Roman
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