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import cStringIO

import unittest

import http

# relative import to ease embedding the library

import util

def chunkedblock(x, eol='\r\n'):

    r"""Make a chunked transfer-encoding block.

    >>> chunkedblock('hi')

    '2\r\nhi\r\n'

    >>> chunkedblock('hi' * 10)

    '14\r\nhihihihihihihihihihi\r\n'

    >>> chunkedblock('hi', eol='\n')

    '2\nhi\n'

    """

    return ''.join((hex(len(x))[2:], eol, x, eol))

class ChunkedTransferTest(util.HttpTestBase, unittest.TestCase):

    def testChunkedUpload(self):

        con = http.HTTPConnection('1.2.3.4:80')

        con._connect()

        sock = con.sock

        sock.read_wait_sentinel = 'end-of-body'

        sock.data = ['HTTP/1.1 200 OK\r\n',

                     'Server: BogusServer 1.0\r\n',

                     'Content-Length: 6',

                     '\r\n\r\n',

                     "Thanks"]

        zz = 'zz\n'

        con.request('POST', '/', body=cStringIO.StringIO(

            (zz * (0x8010 / 3)) + 'end-of-body'))

        expected_req = ('POST / HTTP/1.1\r\n'

                        'transfer-encoding: chunked\r\n'

                        'Host: 1.2.3.4\r\n'

                        'accept-encoding: identity\r\n\r\n')

        expected_req += chunkedblock('zz\n' * (0x8000 / 3) + 'zz')

        expected_req += chunkedblock(

            '\n' + 'zz\n' * ((0x1b - len('end-of-body')) / 3) + 'end-of-body')

        expected_req += '0\r\n\r\n'

        self.assertEqual(('1.2.3.4', 80), sock.sa)

        self.assertStringEqual(expected_req, sock.sent)

        self.assertEqual("Thanks", con.getresponse().read())

        self.assertEqual(sock.closed, False)

    def testChunkedDownload(self):

        con = http.HTTPConnection('1.2.3.4:80')

        con._connect()

        sock = con.sock

        sock.data = ['HTTP/1.1 200 OK\r\n',

                     'Server: BogusServer 1.0\r\n',

                     'transfer-encoding: chunked',

                     '\r\n\r\n',

                     chunkedblock('hi '),

                     chunkedblock('there'),

                     chunkedblock(''),

                     ]

        con.request('GET', '/')

        self.assertStringEqual('hi there', con.getresponse().read())

    def testChunkedDownloadBadEOL(self):

        con = http.HTTPConnection('1.2.3.4:80')

        con._connect()

        sock = con.sock

        sock.data = ['HTTP/1.1 200 OK\n',

                     'Server: BogusServer 1.0\n',

                     'transfer-encoding: chunked',

                     '\n\n',

                     chunkedblock('hi ', eol='\n'),

                     chunkedblock('there', eol='\n'),

                     chunkedblock('', eol='\n'),

                     ]

        con.request('GET', '/')

        self.assertStringEqual('hi there', con.getresponse().read())

    def testChunkedDownloadPartialChunkBadEOL(self):

        con = http.HTTPConnection('1.2.3.4:80')

        con._connect()

        sock = con.sock

        sock.data = ['HTTP/1.1 200 OK\n',

                     'Server: BogusServer 1.0\n',

                     'transfer-encoding: chunked',

                     '\n\n',

                     chunkedblock('hi ', eol='\n'),

                     ] + list(chunkedblock('there\n' * 5, eol='\n')) + [

                         chunkedblock('', eol='\n')]

        con.request('GET', '/')

        self.assertStringEqual('hi there\nthere\nthere\nthere\nthere\n',

                               con.getresponse().read())

    def testChunkedDownloadPartialChunk(self):

        con = http.HTTPConnection('1.2.3.4:80')

        con._connect()

        sock = con.sock

        sock.data = ['HTTP/1.1 200 OK\r\n',

                     'Server: BogusServer 1.0\r\n',

                     'transfer-encoding: chunked',

                     '\r\n\r\n',

                     chunkedblock('hi '),

                     ] + list(chunkedblock('there\n' * 5)) + [chunkedblock('')]

        con.request('GET', '/')

        self.assertStringEqual('hi there\nthere\nthere\nthere\nthere\n',

                               con.getresponse().read())

# no-check-code