import httplib, urllib, base64, N3Parser

class N3Http:

    # defines the address to be accessed
    # example www.w3.org
    def putAddress(self, s):
        self.address = s

    # the string s contains the page at the mentionned address
    # example /index/html
    def getRequest(self, s):
        h = httplib.HTTP(self.address)
        h.putrequest('GET', s)
        h.putheader('Accept', 'text/html')
        h.putheader('Accept', 'text/plain')
        h.putheader('Host', self.address)
        h.endheaders()
        errcode, errmsg, headers = h.getreply()
        print errcode # Should be 200
        f = h.getfile()
        self.httpdata = f.read() # Get the raw HTML
        f.close()

    # read an url
    # proxy must be set in environment variable:
    # http-proxy = "http:// ..."
    def readUrl(self, url):
        f = urllib.urlopen(url)
        self.urldata = f.read()

    # read an url with proxy authentication
    def proxyUrl(self, proxy, userPass, url):
        # connect to the proxy
        h1 = httplib.HTTP(proxy)
        #  give the absolute URL in the request
        h1.putrequest('GET', url)
        h1.putheader('Accept', 'text/html')
        h1.putheader('Accept', 'text/plain')
        #  set the header with a base64 encoding of user-id:passwd
        auth = "Basic " + base64.encodestring(userPass)
        h1.putheader('Proxy-Authorization', auth)
        h1.endheaders()
        #  get the page
        errcode, errmsg, headers = h1.getreply()
        print errcode
        print errmsg
        print headers
        f=h1.getfile()
        self.urldata = ""
        for line in f.readlines():
            self.urldata = self.urldata + line
 
#http = N3Http()
#http.putAddress("192.32.2.7")
#http.getRequest("/")
#print (http.httpdata)
#http.readUrl("http://www.w3.org/2002/03owlt/ontAx.n3")
#              "http://www.w3.org/2002/03owlt/ontAx.n3")
#print "urldata\n\n",http.urldata
#parser = N3Parser.N3Parser()
#li = parser.parseN3("", http.urldata, 0)
#parser.writeOutput(li)