Python pycurl.SSL_VERIFYPEER Examples

def head(self):
		conn=pycurl.Curl()
		conn.setopt(pycurl.SSL_VERIFYPEER,False)
		conn.setopt(pycurl.SSL_VERIFYHOST,1)
		conn.setopt(pycurl.URL,self.completeUrl)

		conn.setopt(pycurl.HEADER, True) # estas dos lineas son las que importan
		conn.setopt(pycurl.NOBODY, True) # para hacer un pedido HEAD

		conn.setopt(pycurl.WRITEFUNCTION, self.header_callback)
		conn.perform()

		rp=Response()
		rp.parseResponse(self.__performHead)
		self.response=rp 

def test_pycurl_insecure(self):
        curl = CurlStub(b"result")
        result = fetch("http://example.com/get-ca-cert", curl=curl,
                       insecure=True)
        self.assertEqual(result, b"result")
        self.assertEqual(curl.options,
                         {pycurl.URL: b"http://example.com/get-ca-cert",
                          pycurl.FOLLOWLOCATION: 1,
                          pycurl.MAXREDIRS: 5,
                          pycurl.CONNECTTIMEOUT: 30,
                          pycurl.LOW_SPEED_LIMIT: 1,
                          pycurl.LOW_SPEED_TIME: 600,
                          pycurl.NOSIGNAL: 1,
                          pycurl.WRITEFUNCTION: Any(),
                          pycurl.SSL_VERIFYPEER: False,
                          pycurl.DNS_CACHE_TIMEOUT: 0,
                          pycurl.ENCODING: b"gzip,deflate"}) 

def head(self):
        conn = pycurl.Curl()
        conn.setopt(pycurl.SSL_VERIFYPEER, False)
        conn.setopt(pycurl.SSL_VERIFYHOST, 0)
        conn.setopt(pycurl.URL, self.completeUrl)

        conn.setopt(pycurl.NOBODY, True)  # para hacer un pedido HEAD

        conn.setopt(pycurl.WRITEFUNCTION, self.header_callback)
        conn.perform()

        rp = Response()
        rp.parseResponse(self.__performHead)
        self.response = rp 

def request(self, url, method, body, headers):
            c = pycurl.Curl()
            c.setopt(pycurl.URL, str(url))
            if 'proxy_host' in self.proxy:
                c.setopt(pycurl.PROXY, self.proxy['proxy_host'])
            if 'proxy_port' in self.proxy:
                c.setopt(pycurl.PROXYPORT, self.proxy['proxy_port'])
            if 'proxy_user' in self.proxy:
                c.setopt(pycurl.PROXYUSERPWD, "%(proxy_user)s:%(proxy_pass)s" % self.proxy)
            self.buf = StringIO()
            c.setopt(pycurl.WRITEFUNCTION, self.buf.write)
            #c.setopt(pycurl.READFUNCTION, self.read)
            #self.body = StringIO(body)
            #c.setopt(pycurl.HEADERFUNCTION, self.header)
            if self.cacert:
                c.setopt(c.CAINFO, str(self.cacert)) 
            c.setopt(pycurl.SSL_VERIFYPEER, self.cacert and 1 or 0)
            c.setopt(pycurl.SSL_VERIFYHOST, self.cacert and 2 or 0)
            c.setopt(pycurl.CONNECTTIMEOUT, self.timeout/6) 
            c.setopt(pycurl.TIMEOUT, self.timeout)
            if method=='POST':
                c.setopt(pycurl.POST, 1)
                c.setopt(pycurl.POSTFIELDS, body)            
            if headers:
                hdrs = ['%s: %s' % (str(k), str(v)) for k, v in headers.items()]
                ##print hdrs
                c.setopt(pycurl.HTTPHEADER, hdrs)
            c.perform()
            ##print "pycurl perform..."
            c.close()
            return {}, self.buf.getvalue() 

def __init__(self, url):
        self.c = pycurl.Curl()
        self.headers = {}
        self.c.setopt(self.c.URL, url)

        if use_cert_authority:
            self.c.setopt(pycurl.CAINFO, CA_PATH)
            self.c.setopt(pycurl.CAPATH, CA_PATH)
            #self.c.setopt(pycurl.CA_BUNDLE, CA_PATH)
        else:
            self.c.setopt(pycurl.SSL_VERIFYHOST, 0)
            self.c.setopt(pycurl.SSL_VERIFYPEER, 0)

        if http_bindaddr:
            self.c.setopt(self.c.INTERFACE, http_bindaddr)

        if user_agent:
            self.c.setopt(pycurl.USERAGENT, user_agent)

        if use_compression:
            if _pycurl_compression:
                # If a zero-length string is set, then an Accept-Encoding header
                # containing all supported encodings is sent.
                self.c.setopt(pycurl.ENCODING, "")
            # someday, gzip manually with GzipFile
            #else:
            #    self.add_header("Accept-Encoding", "gzip")

        if timeout:
            self.c.setopt(self.c.TIMEOUT, timeout)
        if connect_timeout:
            self.c.setopt(self.c.CONNECTTIMEOUT, timeout)
        if max_connects:
            self.c.setopt(self.c.MAXCONNECTS, max_connects) 

def __init__(self, url):
        self.c = pycurl.Curl()
        self.headers = {}
        self.c.setopt(self.c.URL, url)

        if use_cert_authority:
            self.c.setopt(pycurl.CAINFO, CA_PATH)
            self.c.setopt(pycurl.CAPATH, CA_PATH)
            #self.c.setopt(pycurl.CA_BUNDLE, CA_PATH)
        else:
            self.c.setopt(pycurl.SSL_VERIFYHOST, 0)
            self.c.setopt(pycurl.SSL_VERIFYPEER, 0)

        if http_bindaddr:
            self.c.setopt(self.c.INTERFACE, http_bindaddr)

        if user_agent:
            self.c.setopt(pycurl.USERAGENT, user_agent)

        if use_compression:
            if _pycurl_compression:
                # If a zero-length string is set, then an Accept-Encoding header
                # containing all supported encodings is sent.
                self.c.setopt(pycurl.ENCODING, "")
            # someday, gzip manually with GzipFile
            #else:
            #    self.add_header("Accept-Encoding", "gzip")

        if timeout:
            self.c.setopt(self.c.TIMEOUT, timeout)
        if connect_timeout:
            self.c.setopt(self.c.CONNECTTIMEOUT, timeout)
        if max_connects:
            self.c.setopt(self.c.MAXCONNECTS, max_connects) 

def getPage (self, url, requestHeader = []) :
		resultFormate = StringIO.StringIO()

		fakeIp = self.fakeIp()
		requestHeader.append('CLIENT-IP:' + fakeIp)
		requestHeader.append('X-FORWARDED-FOR:' + fakeIp)

		try:
			curl = pycurl.Curl()
			curl.setopt(pycurl.URL, url.strip())
			curl.setopt(pycurl.ENCODING, 'gzip,deflate')
			curl.setopt(pycurl.HEADER, 1)
			curl.setopt(pycurl.TIMEOUT, 120)
			curl.setopt(pycurl.SSL_VERIFYPEER, 0)   
			curl.setopt(pycurl.SSL_VERIFYHOST, 0)
			curl.setopt(pycurl.HTTPHEADER, requestHeader)
			curl.setopt(pycurl.WRITEFUNCTION, resultFormate.write)
			curl.perform()
			headerSize = curl.getinfo(pycurl.HEADER_SIZE)
			curl.close()

			header = resultFormate.getvalue()[0 : headerSize].split('\r\n')
			body = resultFormate.getvalue()[headerSize : ]
		except Exception, e:
			header = ''
			body = '' 

def connect(self, host, port, scheme):
    fp = pycurl.Curl()
    fp.setopt(pycurl.SSL_VERIFYPEER, 0)
    fp.setopt(pycurl.SSL_VERIFYHOST, 0)
    fp.setopt(pycurl.HEADER, 1)
    fp.setopt(pycurl.USERAGENT, 'Mozilla/5.0')
    fp.setopt(pycurl.NOSIGNAL, 1)

    return TCP_Connection(fp) 

def test_secure_download_no_cainfo(self):
        import pycurl
        import io

        # Required mocks
        mock_curl_instance = Mock()
        mock_stringio_instance = Mock()

        mock_stringio_instance.getvalue.return_value = "mock StringIO value"

        mock_stringio_instance.getvalue.return_value = "mock StringIO value"

        expected_setopt_calls = [
            call(pycurl.URL, b"https://example.com/file.extension"),
            call(pycurl.SSL_VERIFYPEER, 1),
            call(pycurl.SSL_VERIFYHOST, 2),
            call(pycurl.WRITEFUNCTION, mock_stringio_instance.write),
            call(pycurl.FOLLOWLOCATION, 1),
            call(pycurl.MAXREDIRS, 10),
        ]

        with patch.object(pycurl, "Curl") as mock_curl_constructor:
            with patch.object(io, "StringIO") as mock_stringio_constructor:
                mock_curl_constructor.return_value = mock_curl_instance
                mock_stringio_constructor.return_value = mock_stringio_instance

                secure_download_result = helpers.secure_download(
                    "https://example.com/file.extension"
                )

        # Check curl calls
        mock_curl_instance.setopt.assert_has_calls(expected_setopt_calls)
        mock_curl_instance.perform.assert_called_once_with()
        mock_curl_instance.close.assert_called_once_with()

        # Check StringIO call
        mock_stringio_instance.getvalue.assert_called_once_with()

        self.assertEqual(secure_download_result, "mock StringIO value") 

def test_secure_download(self):
        import pycurl
        import io

        # Required mocks
        mock_curl_instance = Mock()
        mock_stringio_instance = Mock()

        mock_stringio_instance.getvalue.return_value = "mock StringIO value"

        # Expected pycurl setopt calls
        expected_setopt_calls = [
            call(pycurl.URL, b"https://example.com/file.extension"),
            call(pycurl.SSL_VERIFYPEER, 1),
            call(pycurl.SSL_VERIFYHOST, 2),
            call(pycurl.CAINFO, "/etc/certs/cabundle.pem"),
            call(pycurl.WRITEFUNCTION, mock_stringio_instance.write),
            call(pycurl.FOLLOWLOCATION, 1),
            call(pycurl.MAXREDIRS, 10),
        ]

        with patch.object(pycurl, "Curl") as mock_curl_constructor:
            with patch.object(io, "StringIO") as mock_stringio_constructor:
                mock_curl_constructor.return_value = mock_curl_instance
                mock_stringio_constructor.return_value = mock_stringio_instance

                secure_download_result = helpers.secure_download(
                    "https://example.com/file.extension", "/etc/certs/cabundle.pem"
                )

        # Check curl calls
        mock_curl_instance.setopt.assert_has_calls(expected_setopt_calls)
        mock_curl_instance.perform.assert_called_once_with()
        mock_curl_instance.close.assert_called_once_with()

        # Check StringIO call
        mock_stringio_instance.getvalue.assert_called_once_with()

        self.assertEqual(secure_download_result, "mock StringIO value") 

def secure_download(url, cainfo=""):
    import pycurl
    import io

    c = pycurl.Curl()
    c.setopt(pycurl.URL, url.encode("ascii"))

    # -k / --insecure
    # c.setopt(pycurl.SSL_VERIFYPEER, 0)

    # Verify certificate
    c.setopt(pycurl.SSL_VERIFYPEER, 1)

    # Verify CommonName or Subject Alternate Name
    c.setopt(pycurl.SSL_VERIFYHOST, 2)

    # --cacert
    if cainfo:
        c.setopt(pycurl.CAINFO, cainfo)

    res = io.StringIO()

    c.setopt(pycurl.WRITEFUNCTION, res.write)

    # follow up to 10 http location: headers
    c.setopt(pycurl.FOLLOWLOCATION, 1)
    c.setopt(pycurl.MAXREDIRS, 10)

    c.perform()
    c.close()
    data = res.getvalue()
    res.close()

    return data 

def connect(self, host, port, scheme):
    fp = pycurl.Curl()
    fp.setopt(pycurl.SSL_VERIFYPEER, 0)
    fp.setopt(pycurl.SSL_VERIFYHOST, 0)
    fp.setopt(pycurl.HEADER, 1)
    fp.setopt(pycurl.USERAGENT, 'Mozilla/5.0')
    fp.setopt(pycurl.NOSIGNAL, 1)

    return TCP_Connection(fp) 

def _set_common(self, c):
        c.setopt(pycurl.FOLLOWLOCATION, 1)
        c.setopt(pycurl.AUTOREFERER, 1)
        c.setopt(pycurl.ENCODING, self._accept_encoding)
        c.setopt(pycurl.MAXREDIRS, 255)
        c.setopt(pycurl.CONNECTTIMEOUT, 30)
        c.setopt(pycurl.TIMEOUT, 300)
        c.setopt(pycurl.NOSIGNAL, 1)
        if self._proxy:
            c.setopt(pycurl.PROXY, self._proxy)
        if self._url.scheme == 'https':
            c.setopt(pycurl.SSLVERSION, 3)
            c.setopt(pycurl.SSL_VERIFYPEER, 0) 

def __init__(self, url, params, bind, timeout, allow_redirects, headers, verify_keys):
        """Constructor"""

        self.curl = pycurl.Curl()

        full_url = url if params is None else "%s?%s" % (url, urllib.urlencode(params))
        self.curl.setopt(pycurl.URL, str(full_url))

        if bind is not None:
            self.curl.setopt(pycurl.INTERFACE, str(bind))

        self.curl.setopt(pycurl.FOLLOWLOCATION, allow_redirects)

        if headers is not None:            
            self.curl.setopt(pycurl.HTTPHEADER, [
                "%s: %s" % (str(key), str(value))
                for (key, value) in headers.items()
            ])

        if timeout is not None:
            self.curl.setopt(pycurl.TIMEOUT_MS, int(timeout * 1000.0))

        self.curl.setopt(pycurl.SSL_VERIFYHOST, verify_keys)
        self.curl.setopt(pycurl.SSL_VERIFYPEER, verify_keys)

        self.buf = StringIO.StringIO()
        self.curl.setopt(pycurl.WRITEFUNCTION, self.buf.write) 

def request(self, endpoint, headers=None, post=None, first=True):
        buffer = BytesIO()

        ch = pycurl.Curl()

        ch.setopt(pycurl.URL, endpoint)
        ch.setopt(pycurl.USERAGENT, self.userAgent)
        ch.setopt(pycurl.WRITEFUNCTION, buffer.write)
        ch.setopt(pycurl.FOLLOWLOCATION, True)
        ch.setopt(pycurl.HEADER, True)
        if headers:
            ch.setopt(pycurl.HTTPHEADER, headers)

        ch.setopt(pycurl.VERBOSE, self.debug)
        ch.setopt(pycurl.SSL_VERIFYPEER, False)
        ch.setopt(pycurl.SSL_VERIFYHOST, False)
        ch.setopt(pycurl.COOKIEFILE, self.settingsPath + self.username + '-cookies.dat')
        ch.setopt(pycurl.COOKIEJAR, self.settingsPath + self.username + '-cookies.dat')

        if post:
            import urllib
            ch.setopt(pycurl.POST, len(post))
            ch.setopt(pycurl.POSTFIELDS, urllib.urlencode(post))

        ch.perform()
        resp = buffer.getvalue()
        header_len = ch.getinfo(pycurl.HEADER_SIZE)
        header = resp[0: header_len]
        body = resp[header_len:]
        ch.close()

        if self.debug:
            import urllib
            print("REQUEST: " + endpoint)
            if post is not None:
                if not isinstance(post, list):
                    print('DATA: ' + urllib.unquote_plus(json.dumps(post)))
            print("RESPONSE: " + body + "\n")

        return [header, json_decode(body)] 

def get_rh_sso(self):
        """
        Function wich used login and password to connect at www.redhat.com and return
        the "rh_sso" proxy used for request authentication.
        """
        self._logger.debug("RHEL rh_sso getting in progress...")
        username = self.config_server.redhat["login_username"]
        password = self.config_server.redhat["login_pass"]
        url = 'https://www.redhat.com/wapps/sso/login.html'
        values={'username':username,'password':password,'_flowId':'legacy-login-flow','redirect':'https://www.redhat.com/wapps/ugc/protected/account.html','failureRedirect':'http://www.redhat.com/wapps/sso/login.html'}
        data_post = urllib.urlencode(values)
      
        headers = Storage()
        
        c = pycurl.Curl()
        c.setopt(pycurl.URL, url)
#==============================================================================
#     DEBUG comments in order to use the Burp Proxy software 
#==============================================================================
    #c.setopt(pycurl.PROXY, '127.0.0.1')
    #c.setopt(pycurl.PROXYPORT, 8080)
    #c.setopt(pycurl.SSL_VERIFYPEER, 1)
    #c.setopt(pycurl.SSL_VERIFYHOST, 2)
    #c.setopt(pycurl.CAINFO, "/home/thierry/Divers/Burp/cacert.crt")
#==============================================================================
        c.setopt(pycurl.USERAGENT, "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0")
        c.setopt(pycurl.HTTPHEADER, ['Accept-Language: en-US,en;q=0.5',
                                     'Connection: keep-alive',
                                     'www.whitehouse.gov: 200'])
        c.setopt(pycurl.POST, 1)
        c.setopt(pycurl.POSTFIELDS, data_post)
        
        c.setopt(c.HEADERFUNCTION, headers.store)
        
        c.perform()
        c.close()
        headers = str(headers)
        
        expression = r"(?P<var1>.*)(?P<rh_sso>Set-Cookie: rh_sso=)(?P<sso_key>(?!\").*?)(?P<end>;)"
        header_lines = headers.split('\n')
        for head in header_lines:
            result_re = re.match(expression, head)
            
            if result_re is not None:
                sso_key = "rh_sso=" + str(result_re.group('sso_key'))
        self._logger.debug("rh_sso value : "+ str(sso_key))
        return sso_key 

def init_pycurl(debug=False):
    """
    Provides an instances of pycurl with basic configuration
    :return: pycurl instance
    """
    _curl = pycurl.Curl()
    _curl.setopt(pycurl.SSL_OPTIONS, pycurl.SSLVERSION_TLSv1_2)
    _curl.setopt(pycurl.SSL_VERIFYPEER, False)
    _curl.setopt(pycurl.SSL_VERIFYHOST, False)
    _curl.setopt(pycurl.VERBOSE, debug)
    _curl.setopt(pycurl.TIMEOUT, 10)
    _curl.setopt(pycurl.COOKIEFILE, "")
    _curl.setopt(pycurl.USERAGENT, 'APIFuzzer')
    return _curl 

def run(self):
        c = pycurl.Curl()
        c.setopt(pycurl.URL, self.url)
        c.setopt(pycurl.FOLLOWLOCATION, True)
        c.setopt(pycurl.MAXREDIRS, 4)
        #c.setopt(pycurl.NOBODY, 1)

        c.setopt(c.VERBOSE, True)

        #c.setopt(pycurl.CONNECTTIMEOUT, 20)
        
        if self.useragent:
            c.setopt(pycurl.USERAGENT, self.useragent)
        
        # add cookies, if available
        if self.cookies:
            c.setopt(pycurl.COOKIE, self.cookies)
        
        #realurl = c.getinfo(pycurl.EFFECTIVE_URL)
        realurl = self.url
        print("realurl",realurl)
        self.filename = realurl.split("/")[-1].strip()
        c.setopt(pycurl.URL, realurl)
        c.setopt(pycurl.FOLLOWLOCATION, True)
        c.setopt(pycurl.NOPROGRESS, False)
        c.setopt(pycurl.XFERINFOFUNCTION, self.getProgress)
        
        c.setopt(pycurl.SSL_VERIFYPEER, False)
        c.setopt(pycurl.SSL_VERIFYHOST, False)
        
        # configure pycurl output file
        if self.path == False:
            self.path = os.getcwd()
        filepath = os.path.join(self.path, self.filename)
        
         
        if os.path.exists(filepath):## remove old file,restart download 
            os.system("rm -rf " + filepath)
        
        buffer = StringIO() 
        c.setopt(pycurl.WRITEDATA, buffer)
        
        self._dst_path = filepath

        # add cookies, if available
        if self.cookies:
            c.setopt(pycurl.COOKIE, self.cookies)
        
        self._stop = False
        self.progress["stopped"] = False 
        # download file
        try:
            c.perform()
        except pycurl.error, error:
            errno,errstr = error
            print("curl error: %s" % errstr)
            self._errors.append(errstr)
            self._stop = True
            self.progress["stopped"] = True
            self.stop() 

def __init__(self, url, auth, verify):
        self.url = url
        self.received_buffer = BytesIO()

        headers = ['Cache-Control: no-cache', 'Accept: text/event-stream']

        self.curl = pycurl.Curl()
        self.curl.setopt(pycurl.URL, url)
        self.curl.setopt(pycurl.ENCODING, 'gzip')
        self.curl.setopt(pycurl.CONNECTTIMEOUT, 10)
        self.curl.setopt(pycurl.WRITEDATA, self.received_buffer)

        # Marathon >= 1.7.x returns 30x responses for /v2/events responses
        # when they're coming from a non-leader. So we follow redirects.
        self.curl.setopt(pycurl.FOLLOWLOCATION, True)
        self.curl.setopt(pycurl.MAXREDIRS, 1)
        self.curl.setopt(pycurl.UNRESTRICTED_AUTH, True)

        # The below settings are to prevent the connection from hanging if the
        # connection breaks silently. Since marathon-lb only listens, silent
        # connection failure results in marathon-lb waiting infinitely.
        #
        # Minimum bytes/second below which it is considered "low speed". So
        # "low speed" here refers to 0 bytes/second.
        self.curl.setopt(pycurl.LOW_SPEED_LIMIT, 1)
        # How long (in seconds) it's allowed to go below the speed limit
        # before it times out
        self.curl.setopt(pycurl.LOW_SPEED_TIME, 300)

        if auth and type(auth) is DCOSAuth:
            auth.refresh_auth_header()
            headers.append('Authorization: %s' % auth.auth_header)
        elif auth:
            self.curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
            self.curl.setopt(pycurl.USERPWD, '%s:%s' % auth)
        if verify:
            self.curl.setopt(pycurl.CAINFO, verify)
        else:
            self.curl.setopt(pycurl.SSL_VERIFYHOST, 0)
            self.curl.setopt(pycurl.SSL_VERIFYPEER, 0)

        self.curl.setopt(pycurl.HTTPHEADER, headers)

        self.curlmulti = pycurl.CurlMulti()
        self.curlmulti.add_handle(self.curl)

        self.status_code = 0 

def perform(self):
		self.__performHead=""
		self.__performBody=""

		conn=pycurl.Curl()
		conn.setopt(pycurl.SSL_VERIFYPEER,False)
		conn.setopt(pycurl.SSL_VERIFYHOST,1)
		conn.setopt(pycurl.URL,self.completeUrl)

		if self.__method or self.__userpass:
			if self.__method=="basic":
				conn.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
			elif self.__method=="ntlm":
				conn.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_NTLM)
			elif self.__method=="digest":
				conn.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_DIGEST)
			conn.setopt(pycurl.USERPWD, self.__userpass)

		if self.__timeout:
			conn.setopt(pycurl.CONNECTTIMEOUT, self.__timeout)
			conn.setopt(pycurl.NOSIGNAL, 1)

		if self.__totaltimeout:
			conn.setopt(pycurl.TIMEOUT, self.__totaltimeout)
			conn.setopt(pycurl.NOSIGNAL, 1)

		conn.setopt(pycurl.WRITEFUNCTION, self.body_callback)
		conn.setopt(pycurl.HEADERFUNCTION, self.header_callback)

		if self.__proxy!=None:
			conn.setopt(pycurl.PROXY,self.__proxy)
			if self.__headers.has_key("Proxy-Connection"):
				del self.__headers["Proxy-Connection"]

		conn.setopt(pycurl.HTTPHEADER,self.__getHeaders())
		if self.method=="POST":
			conn.setopt(pycurl.POSTFIELDS,self.__postdata)
		conn.perform()

		rp=Response()
		rp.parseResponse(self.__performHead)
		rp.addContent(self.__performBody)

		self.response=rp

	######### ESTE conjunto de funciones no es necesario para el uso habitual de la clase 

def upload(self,
               url,
               data,
               header=None,
               proxy_host=None,
               proxy_port=None,
               cookie_file=None):
        '''
        open url with upload
        @param url: the url to visit
        @param data: the data to upload
        @param header: the http header
        @param proxy_host: the proxy host name
        @param proxy_port: the proxy port
        '''
        crl = pycurl.Curl()
        #crl.setopt(pycurl.VERBOSE,1)
        crl.setopt(pycurl.NOSIGNAL, 1)

        # set proxy
        rel_proxy_host = proxy_host or self.proxy_host
        if rel_proxy_host:
            crl.setopt(pycurl.PROXY, rel_proxy_host)
        rel_proxy_port = proxy_port or self.proxy_port
        if rel_proxy_port:
            crl.setopt(pycurl.PROXYPORT, rel_proxy_port)

            # set cookie
        rel_cookie_file = cookie_file or self.cookie_file
        if rel_cookie_file:
            crl.setopt(pycurl.COOKIEFILE, rel_cookie_file)
            crl.setopt(pycurl.COOKIEJAR, rel_cookie_file)

            # set ssl
        crl.setopt(pycurl.SSL_VERIFYPEER, 0)
        crl.setopt(pycurl.SSL_VERIFYHOST, 0)
        crl.setopt(pycurl.SSLVERSION, 3)

        crl.setopt(pycurl.CONNECTTIMEOUT, 10)
        crl.setopt(pycurl.TIMEOUT, 300)
        crl.setopt(pycurl.HTTPPROXYTUNNEL, 1)

        rel_header = header or self.header
        if rel_header:
            crl.setopt(pycurl.HTTPHEADER, rel_header)

        crl.fp = StringIO.StringIO()

        if isinstance(url, unicode):
            url = str(url)
        crl.setopt(pycurl.URL, url)
        crl.setopt(pycurl.HTTPPOST, data)  # upload file
        crl.setopt(crl.WRITEFUNCTION, crl.fp.write)
        try:
            crl.perform()
        except Exception, e:
            raise CurlException(e) 

def post(self,
             url,
             data,
             header=None,
             proxy_host=None,
             proxy_port=None,
             cookie_file=None):
        '''
        open url width post method
        @param url: the url to visit
        @param data: the data to post
        @param header: the http header
        @param proxy_host: the proxy host name
        @param proxy_port: the proxy port
        '''
        crl = pycurl.Curl()
        #crl.setopt(pycurl.VERBOSE,1)
        crl.setopt(pycurl.NOSIGNAL, 1)

        # set proxy
        rel_proxy_host = proxy_host or self.proxy_host
        if rel_proxy_host:
            crl.setopt(pycurl.PROXY, rel_proxy_host)
        rel_proxy_port = proxy_port or self.proxy_port
        if rel_proxy_port:
            crl.setopt(pycurl.PROXYPORT, rel_proxy_port)

            # set cookie
        rel_cookie_file = cookie_file or self.cookie_file
        if rel_cookie_file:
            crl.setopt(pycurl.COOKIEFILE, rel_cookie_file)
            crl.setopt(pycurl.COOKIEJAR, rel_cookie_file)

            # set ssl
        crl.setopt(pycurl.SSL_VERIFYPEER, 0)
        crl.setopt(pycurl.SSL_VERIFYHOST, 0)
        crl.setopt(pycurl.SSLVERSION, 3)

        crl.setopt(pycurl.CONNECTTIMEOUT, 10)
        crl.setopt(pycurl.TIMEOUT, 300)
        crl.setopt(pycurl.HTTPPROXYTUNNEL, 1)

        rel_header = header or self.header
        if rel_header:
            crl.setopt(pycurl.HTTPHEADER, rel_header)

        crl.fp = StringIO.StringIO()

        crl.setopt(crl.POSTFIELDS, data)  # post data

        if isinstance(url, unicode):
            url = str(url)
        crl.setopt(pycurl.URL, url)
        crl.setopt(crl.WRITEFUNCTION, crl.fp.write)
        try:
            crl.perform()
        except Exception, e:
            raise CurlException(e) 

def Download_data(Date, Version, output_folder, Var):        
    """
    This function downloads CFSR data from the FTP server
				For - CFSR:    https://nomads.ncdc.noaa.gov/data/cfsr/
				    - CFSRv2:  http://nomads.ncdc.noaa.gov/modeldata/cfsv2_analysis_timeseries/

    Keyword arguments:
    Date -- pandas timestamp day
    Version -- 1 or 2 (1 = CFSR, 2 = CFSRv2)			
    output_folder -- The directory for storing the downloaded files
    Var -- The variable that must be downloaded from the server ('dlwsfc','uswsfc','dswsfc','ulwsfc')
    """
    # Define the filename that must be downloaded     
    if Version == 1:
        filename = Var + '.gdas.' + str(Date.strftime('%Y')) + str(Date.strftime('%m')) + '.grb2'
    if Version == 2:
        filename = Var + '.gdas.' + str(Date.strftime('%Y')) + str(Date.strftime('%m')) + '.grib2'

    try:
         # download the file when it not exist					
        local_filename = os.path.join(output_folder, filename)
        if not os.path.exists(local_filename):
            Downloaded = 0
            Times = 0
            while Downloaded == 0:				
                # Create the command and run the command in cmd
                if Version == 1:
                    FTP_name = 'https://nomads.ncdc.noaa.gov/data/cfsr/' + Date.strftime('%Y') + Date.strftime('%m')+ '/' + filename
    							
                if Version == 2:
                    FTP_name = 'https://nomads.ncdc.noaa.gov/modeldata/cfsv2_analysis_timeseries/' + Date.strftime('%Y') + '/' + Date.strftime('%Y') + Date.strftime('%m')+ '/' + filename
    
                curl = pycurl.Curl()
                curl.setopt(pycurl.URL, FTP_name)
                fp = open(local_filename, "wb")
                curl.setopt(pycurl.SSL_VERIFYPEER, 0)
                curl.setopt(pycurl.SSL_VERIFYHOST, 0)
                curl.setopt(pycurl.WRITEDATA, fp)
                curl.perform()
                curl.close()
                fp.close()	
                statinfo = os.stat(local_filename)		
                if int(statinfo.st_size) > 10000:
                    Downloaded = 1	
                else:
                    Times += 1
                    if Times == 10:
                        Downloaded = 1
    except:
        print 'Was not able to download the CFSR file from the FTP server'
    
    return(local_filename) 

def request(self, path="/", header=None, ssl=False, timeout=None):

        if timeout is None:
            timeout = self.timeout

        buf = StringIO()
        c = pycurl.Curl()

        if header:
            slist = []
            for key, value in header.iteritems():
                slist.append(key+": "+value)
            c.setopt(pycurl.HTTPHEADER, slist)

        c.setopt(pycurl.HEADERFUNCTION, self.header_function)
        c.setopt(pycurl.FOLLOWLOCATION, True)
        c.setopt(pycurl.WRITEDATA, buf)
        c.setopt(pycurl.TIMEOUT, timeout)
        c.setopt(pycurl.ENCODING, 'identity')
        c.setopt(pycurl.NOSIGNAL, 1)

        if ssl:
            if self.port is None:
                self.port = 443
            c.setopt(pycurl.URL, "https://"+self.host+":"+str(self.port)+path)
            c.setopt(pycurl.SSL_VERIFYPEER, 1)
            c.setopt(pycurl.SSL_VERIFYHOST, 2)
        else:
            if self.port is None:
                self.port = 80
            c.setopt(pycurl.URL,"http://"+self.host + ":" + str(self.port) + path)

        c.perform()

        self.status = c.getinfo(pycurl.RESPONSE_CODE)

        c.close()

        encoding = None
        if 'content-type' in self.headers:
            content_type = self.headers['content-type'].lower()
            match = re.search('charset=(\S+)', content_type)
            if match:
                encoding = match.group(1)
        if encoding is None:
            # Default encoding for HTML is iso-8859-1.
            # Other content types may have different default encoding,
            # or in case of binary data, may have no encoding at all.
            encoding = 'iso-8859-1'

        self.body = buf.getvalue().decode(encoding) 

def get(self,
            url,
            header=None,
            proxy_host=None,
            proxy_port=None,
            cookie_file=None):
        '''
        open url width get method
        @param url: the url to visit
        @param header: the http header
        @param proxy_host: the proxy host name
        @param proxy_port: the proxy port
        '''
        crl = pycurl.Curl()
        #crl.setopt(pycurl.VERBOSE,1)
        crl.setopt(pycurl.NOSIGNAL, 1)

        # set proxy
        # crl.setopt(pycurl.PROXYTYPE, pycurl.PROXYTYPE_SOCKS5)

        rel_proxy_host = proxy_host or self.proxy_host
        if rel_proxy_host:
            crl.setopt(pycurl.PROXY, rel_proxy_host)

        rel_proxy_port = proxy_port or self.proxy_port
        if rel_proxy_port:
            crl.setopt(pycurl.PROXYPORT, rel_proxy_port)

            # set cookie
        rel_cookie_file = cookie_file or self.cookie_file
        if rel_cookie_file:
            crl.setopt(pycurl.COOKIEFILE, rel_cookie_file)
            crl.setopt(pycurl.COOKIEJAR, rel_cookie_file)

            # set ssl
        crl.setopt(pycurl.SSL_VERIFYPEER, 0)
        crl.setopt(pycurl.SSL_VERIFYHOST, 0)
        crl.setopt(pycurl.SSLVERSION, 3)

        crl.setopt(pycurl.CONNECTTIMEOUT, 10)
        crl.setopt(pycurl.TIMEOUT, 300)
        crl.setopt(pycurl.HTTPPROXYTUNNEL, 1)

        rel_header = header or self.header
        if rel_header:
            crl.setopt(pycurl.HTTPHEADER, rel_header)

        crl.fp = StringIO.StringIO()

        if isinstance(url, unicode):
            url = str(url)
        crl.setopt(pycurl.URL, url)
        crl.setopt(crl.WRITEFUNCTION, crl.fp.write)
        try:
            crl.perform()
        except Exception, e:
            raise CurlException(e)