Detailed introduction to using curl library pycurl examples and parameters

pycurl is a powerful python url library, written in c language. It is very fast, faster than urllib and httplib.

Today we look at the usage and parameters of pycurl in detail

Commonly used methods:

pycurl.Curl() #Method to create a pycurlobject

pycurl.Curl().setopt(pycurl.URL, http://www.pythontab.com) #Set the URL to be accessed

pycurl.Curl().setopt(pycurl. MAXREDIRS, 5) #Set the maximum number of redirects

pycurl.Curl().setopt(pycurl.CONNECTTIMEOUT, 60)

pycurl.Curl().setopt(pycurl.TIMEOUT, 300) #Connection timeout setting

pycurl.Curl().setopt(pycurl.USERAGENT, "Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322)") #Simulated browsing Device

pycurl.Curl().perform() #Information returned by the server

pycurl.Curl().getinfo(pycurl.HTTP_CODE) #View HTTP statusSimilar to the status attribute in urllib

pycurl.NAMELOOKUP_TIME domain name resolution time

pycurl.CONNECT_TIME remote server connection time

pycurl.PRETRANSFER_TIME time after connection to start of transmission

pycurl.STARTTRANSFER_TIME The time to receive the first byte

pycurl.TOTAL_TIME The total time of the previous request

pycurl.REDIRECT_TIME If there is a redirection, the time it takes

pycurl.EFFECTIVE_URL

pycurl.HTTP_CODE HTTP response code

pycurl.REDIRECT_COUNT Number of redirects

pycurl.SIZE_UPLOAD Data size of upload

pycurl.SIZE_DOWNLOAD Size of downloaded data

pycurl.SPEED_UPLOAD Upload speed

pycurl.HEADER_SIZE Header size

pycurl.REQUEST_SIZE Request size

pycurl.CONTENT_LENGTH_DOWNLOAD Download content length

pycurl.CONTENT_LENGTH_UPLOAD Upload content length

pycurl.CONTENT_TYPE Content type

pycurl. RESPONSE_CODE response code

pycurl.SPEED_DOWNLOAD download speed

pycurl.SSL_VERIFYRESULT

pycurl.INFO_FILETIME file time information

pycurl.HTTP_CONNECTCODE HTTP connection code

pycurl.HTTPAUTH_AVAIL

pycurl.PROXYAUTH_AVAIL

pycurl.OS_ERRNO

pycurl.NUM_CONNECTS

pycurl. SSL_ENGINES

pycurl.INFO_COOKIELIST

pycurl.LASTSOCKET

pycurl.FTP_ENTRY_PATH

Example:

import StringIO
import pycurl
 
c = pycurl.Curl()
str = StringIO.StringIO()
c.setopt(pycurl.URL, "http://www.pythontab.com")
c.setopt(pycurl.WRITEFUNCTION, str.write)
c.setopt(pycurl.FOLLOWLOCATION, 1)
 
c.perform()
print c.getinfo(pycurl.EFFECTIVE_URL)

Friends who are familiar with PHP may have discovered that the usage of this curl library is very similar to PHP's curl.

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