Detailed explanation of curl library pycurl examples and parameters

Pycurl is a powerful Python URL library. It is written in C language and is very fast, faster than urllib and httplib.

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

Common methods:

pycurl.Curl() #Method to create a pycurl object

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)") #Simulate browser

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

pycurl.Curl().getinfo(pycurl.HTTP_CODE) #View HTTP status is similar The status attribute in urllib

pycurl.NAMELOOKUP_TIME Domain name resolution time

pycurl.CONNECT_TIME Remote server connection time

pycurl.PRETRANSFER_TIME The time after connecting to when the transmission starts

pycurl.STARTTRANSFER_TIME The time when the first byte is received

pycurl.TOTAL_TIME The total time of the last request

pycurl.REDIRECT_TIME If there is a redirect, the time spent

pycurl.EFFECTIVE_URL

pycurl.HTTP_CODE HTTP response code

pycurl.REDIRECT_COUNT The number of redirects

pycurl.SIZ E_UPLOAD Uploaded data size

pycurl.SIZE_DOWNLOAD Downloaded data size

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 Type of content

pycurl.RESPONSE_CODE Response code

pycurl.SPEED_DOWNLOAD Download speed

pycurl.SSL_VERIFYRESULT

pycurl.INFO_FILETIME Time information for the file

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

pycur l.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 You may have discovered that the usage of this curl library is very similar to PHP's curl.