Getting DNS resolution time and response time with Python
Does PycURL or any other python pakcage provide information about:
- Search
- connection time
I would like to get the same information as this cURL command (without calling the command using a subprocess):
Command
curl -s -w '\nLookup time:\t%{time_namelookup}\nConnect time:\t%{time_connect}\nPreXfer time:\t%{time_pretransfer}\nStartXfer time:\t%{time_starttransfer}\n\nTotal time:\t%{time_total}\n' -o /dev/null http://stackoverflow.com/
Output:
Lookup time: 0.029
Connect time: 0.144
PreXfer time: 0.144
StartXfer time: 0.263
Total time: 0.803
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1 answer
Yes, PyCurl provides information. You can get information with pycurl
. He can give a lot of details, not just the ones you mentioned.
Here's some sample code you can use to get the same information:
import pycurl
from io import BytesIO
buffer = BytesIO()
c = pycurl.Curl()
c.setopt(c.URL, 'http://stackoverflow.com/')
c.setopt(c.WRITEDATA, buffer)
c.perform()
body = buffer.getvalue()
print('TOTAL_TIME: %f' % c.getinfo(c.TOTAL_TIME))
print('CONNECT_TIME: %f' % c.getinfo(c.CONNECT_TIME))
print('PRETRANSFER_TIME: %f' % c.getinfo(c.PRETRANSFER_TIME))
print('STARTTRANSFER_TIME: %f' % c.getinfo(c.STARTTRANSFER_TIME))
c.close()
It gives the following results:
TOTAL_TIME: 2.252639
CONNECT_TIME: 0.331571
PRETRANSFER_TIME: 0.331634
STARTTRANSFER_TIME: 0.638206
I found a GitHub link that mentions other flags as well that may be used in your code. Here are the flags for a quick look:
* EFFECTIVE_URL
* HTTP_CODE
* TOTAL_TIME
* NAMELOOKUP_TIME
* CONNECT_TIME
* PRETRANSFER_TIME
* REDIRECT_TIME
* REDIRECT_COUNT
* SIZE_UPLOAD
* SIZE_DOWNLOAD
* SPEED_UPLOAD
* HEADER_SIZE
* REQUEST_SIZE
* CONTENT_LENGTH_DOWNLOAD
* CONTENT_LENGTH_UPLOAD
* CONTENT_TYPE
* RESPONSE_CODE
* SPEED_DOWNLOAD
* SSL_VERIFYRESULT
* INFO_FILETIME
* STARTTRANSFER_TIME
* REDIRECT_TIME
* REDIRECT_COUNT
* HTTP_CONNECTCODE
* HTTPAUTH_AVAIL
* PROXYAUTH_AVAIL
* OS_ERRNO
* NUM_CONNECTS
* SSL_ENGINES
* INFO_COOKIELIST
* LASTSOCKET
* FTP_ENTRY_PATH
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