How To Access Data With PyDAP

# BEGIN BASIC AUTH MODULE CODE (Comments removed)

import cookielib

import netrc

import urllib2

import re

import pydap.lib

from pydap.exceptions import ClientError

import logging

log = logging.getLogger(__name__)

log.setLevel(logging.DEBUG)

# Set the debug level for urllib2.

debuglevel=1

def install_basic_client(uri='', user='', passwd='', use_netrc=True):

    # Create special opener with support for Cookies

    cj = cookielib.CookieJar()

    # Create the password manager and load with the credentials using 

    pwMgr = urllib2.HTTPPasswordMgrWithDefaultRealm()

    # Get passwords from the .netrc file nless use_netrc is False    

    if use_netrc:

        logins = netrc.netrc()

        accounts = logins.hosts # a dist of hosts and tuples

        for host, info in accounts.iteritems():

            login, account, password = info

            log.debug('Host: %s; login: %s; account: %s; password: %s' % (host, login, account, password))

            pwMgr.add_password(None, host, login, password)

    if uri and user and passwd:

        pwMgr.add_password(None, uri, user, passwd)

    opener = urllib2.build_opener(urllib2.HTTPBasicAuthHandler(pwMgr),

                                  urllib2.HTTPCookieProcessor(cj))

    
    opener.addheaders = [('User-agent', 'pydap/EL')]

    urllib2.install_opener(opener)

    def new_request(url):

        if url[-1] is '&': url = url[0:-1]

        log.debug('Opening %s (install_basic_client)' % url)

        r = urllib2.urlopen(url)

        resp = r.headers.dict

        resp['status'] = str(r.code)

        data = r.read()

        # When an error is returned, we parse the error message from the

        # server and return it in a ``ClientError`` exception.

        if resp.get("content-description") == "dods_error":

            m = re.search('code = (?P<code>\d+);\s*message = "(?P<msg>.*)"',

                    data, re.DOTALL | re.MULTILINE)

            msg = 'Server error %(code)s: "%(msg)s"' % m.groupdict()

            raise ClientError(msg)

        return resp, data

    from pydap.util import http

    http.request = new_request

# END BASIC AUTH MODULE CODE

install_basic_client()