"""Unittests for the various HTTPServer modules.

Written by Cody A.W. Somerville <cody-somerville@ubuntu.com>,
Josip Dzolonga, and Michael Otteneder for the 2007/08 GHOP contest.
"""

from http.server import BaseHTTPRequestHandler, HTTPServer, \
     SimpleHTTPRequestHandler, CGIHTTPRequestHandler
from http import server

import os
import sys
import base64
import shutil
import urllib.parse
import http.client
import tempfile
import threading

import unittest
from test import support

class NoLogRequestHandler:
    def log_message(self, *args):
        # don't write log messages to stderr
        pass

    def read(self, n=None):
        return ''


class TestServerThread(threading.Thread):
    def __init__(self, test_object, request_handler):
        threading.Thread.__init__(self)
        self.request_handler = request_handler
        self.test_object = test_object
        self.test_object.lock.acquire()

    def run(self):
        self.server = HTTPServer(('', 0), self.request_handler)
        self.test_object.PORT = self.server.socket.getsockname()[1]
        self.test_object.lock.release()
        try:
            self.server.serve_forever()
        finally:
            self.server.server_close()

    def stop(self):
        self.server.shutdown()


class BaseTestCase(unittest.TestCase):
    def setUp(self):
        self.lock = threading.Lock()
        self.thread = TestServerThread(self, self.request_handler)
        self.thread.start()
        self.lock.acquire()

    def tearDown(self):
        self.lock.release()
        self.thread.stop()

    def request(self, uri, method='GET', body=None, headers={}):
        self.connection = http.client.HTTPConnection('localhost', self.PORT)
        self.connection.request(method, uri, body, headers)
        return self.connection.getresponse()


class BaseHTTPServerTestCase(BaseTestCase):
    class request_handler(NoLogRequestHandler, BaseHTTPRequestHandler):
        protocol_version = 'HTTP/1.1'
        default_request_version = 'HTTP/1.1'

        def do_TEST(self):
            self.send_response(204)
            self.send_header('Content-Type', 'text/html')
            self.send_header('Connection', 'close')
            self.end_headers()

        def do_KEEP(self):
            self.send_response(204)
            self.send_header('Content-Type', 'text/html')
            self.send_header('Connection', 'keep-alive')
            self.end_headers()

        def do_KEYERROR(self):
            self.send_error(999)

        def do_CUSTOM(self):
            self.send_response(999)
            self.send_header('Content-Type', 'text/html')
            self.send_header('Connection', 'close')
            self.end_headers()

    def setUp(self):
        BaseTestCase.setUp(self)
        self.con = http.client.HTTPConnection('localhost', self.PORT)
        self.con.connect()

    def test_command(self):
        self.con.request('GET', '/')
        res = self.con.getresponse()
        self.assertEquals(res.status, 501)

    def test_request_line_trimming(self):
        self.con._http_vsn_str = 'HTTP/1.1\n'
        self.con.putrequest('GET', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 501)

    def test_version_bogus(self):
        self.con._http_vsn_str = 'FUBAR'
        self.con.putrequest('GET', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 400)

    def test_version_digits(self):
        self.con._http_vsn_str = 'HTTP/9.9.9'
        self.con.putrequest('GET', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 400)

    def test_version_none_get(self):
        self.con._http_vsn_str = ''
        self.con.putrequest('GET', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 501)

    def test_version_none(self):
        self.con._http_vsn_str = ''
        self.con.putrequest('PUT', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 400)

    def test_version_invalid(self):
        self.con._http_vsn = 99
        self.con._http_vsn_str = 'HTTP/9.9'
        self.con.putrequest('GET', '/')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 505)

    def test_send_blank(self):
        self.con._http_vsn_str = ''
        self.con.putrequest('', '')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 400)

    def test_header_close(self):
        self.con.putrequest('GET', '/')
        self.con.putheader('Connection', 'close')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 501)

    def test_head_keep_alive(self):
        self.con._http_vsn_str = 'HTTP/1.1'
        self.con.putrequest('GET', '/')
        self.con.putheader('Connection', 'keep-alive')
        self.con.endheaders()
        res = self.con.getresponse()
        self.assertEquals(res.status, 501)

    def test_handler(self):
        self.con.request('TEST', '/')
        res = self.con.getresponse()
        self.assertEquals(res.status, 204)

    def test_return_header_keep_alive(self):
        self.con.request('KEEP', '/')
        res = self.con.getresponse()
        self.assertEquals(res.getheader('Connection'), 'keep-alive')
        self.con.request('TEST', '/')

    def test_internal_key_error(self):
        self.con.request('KEYERROR', '/')
        res = self.con.getresponse()
        self.assertEquals(res.status, 999)

    def test_return_custom_status(self):
        self.con.request('CUSTOM', '/')
        res = self.con.getresponse()
        self.assertEquals(res.status, 999)


class SimpleHTTPServerTestCase(BaseTestCase):
    class request_handler(NoLogRequestHandler, SimpleHTTPRequestHandler):
        pass

    def setUp(self):
        BaseTestCase.setUp(self)
        self.cwd = os.getcwd()
        basetempdir = tempfile.gettempdir()
        os.chdir(basetempdir)
        self.data = b'We are the knights who say Ni!'
        self.tempdir = tempfile.mkdtemp(dir=basetempdir)
        self.tempdir_name = os.path.basename(self.tempdir)
        temp = open(os.path.join(self.tempdir, 'test'), 'wb')
        temp.write(self.data)
        temp.close()

    def tearDown(self):
        try:
            os.chdir(self.cwd)
            try:
                shutil.rmtree(self.tempdir)
            except:
                pass
        finally:
            BaseTestCase.tearDown(self)

    def check_status_and_reason(self, response, status, data=None):
        body = response.read()
        self.assertTrue(response)
        self.assertEquals(response.status, status)
        self.assertTrue(response.reason != None)
        if data:
            self.assertEqual(data, body)

    def test_get(self):
        #constructs the path relative to the root directory of the HTTPServer
        response = self.request(self.tempdir_name + '/test')
        self.check_status_and_reason(response, 200, data=self.data)
        response = self.request(self.tempdir_name + '/')
        self.check_status_and_reason(response, 200)
        response = self.request(self.tempdir_name)
        self.check_status_and_reason(response, 301)
        response = self.request('/ThisDoesNotExist')
        self.check_status_and_reason(response, 404)
        response = self.request('/' + 'ThisDoesNotExist' + '/')
        self.check_status_and_reason(response, 404)
        f = open(os.path.join(self.tempdir_name, 'index.html'), 'w')
        response = self.request('/' + self.tempdir_name + '/')
        self.check_status_and_reason(response, 200)
        if os.name == 'posix':
            # chmod won't work as expected on Windows platforms
            os.chmod(self.tempdir, 0)
            response = self.request(self.tempdir_name + '/')
            self.check_status_and_reason(response, 404)
            os.chmod(self.tempdir, 0o755)

    def test_head(self):
        response = self.request(
            self.tempdir_name + '/test', method='HEAD')
        self.check_status_and_reason(response, 200)
        self.assertEqual(response.getheader('content-length'),
                         str(len(self.data)))
        self.assertEqual(response.getheader('content-type'),
                         'application/octet-stream')

    def test_invalid_requests(self):
        response = self.request('/', method='FOO')
        self.check_status_and_reason(response, 501)
        # requests must be case sensitive,so this should fail too
        response = self.request('/', method='get')
        self.check_status_and_reason(response, 501)
        response = self.request('/', method='GETs')
        self.check_status_and_reason(response, 501)


cgi_file1 = """\
#!%s

print("Content-type: text/html")
print()
print("Hello World")
"""

cgi_file2 = """\
#!%s
import cgi

print("Content-type: text/html")
print()

form = cgi.FieldStorage()
print("%%s, %%s, %%s" %% (form.getfirst("spam"), form.getfirst("eggs"),\
              form.getfirst("bacon")))
"""

class CGIHTTPServerTestCase(BaseTestCase):
    class request_handler(NoLogRequestHandler, CGIHTTPRequestHandler):
        pass

    def setUp(self):
        BaseTestCase.setUp(self)
        self.parent_dir = tempfile.mkdtemp()
        self.cgi_dir = os.path.join(self.parent_dir, 'cgi-bin')
        os.mkdir(self.cgi_dir)

        self.file1_path = os.path.join(self.cgi_dir, 'file1.py')
        with open(self.file1_path, 'w') as file1:
            file1.write(cgi_file1 % sys.executable)
        os.chmod(self.file1_path, 0o777)

        self.file2_path = os.path.join(self.cgi_dir, 'file2.py')
        with open(self.file2_path, 'w') as file2:
            file2.write(cgi_file2 % sys.executable)
        os.chmod(self.file2_path, 0o777)

        self.cwd = os.getcwd()
        os.chdir(self.parent_dir)

    def tearDown(self):
        try:
            os.chdir(self.cwd)
            os.remove(self.file1_path)
            os.remove(self.file2_path)
            os.rmdir(self.cgi_dir)
            os.rmdir(self.parent_dir)
        finally:
            BaseTestCase.tearDown(self)

    def test_url_collapse_path_split(self):
        test_vectors = {
            '': ('/', ''),
            '..': IndexError,
            '/.//..': IndexError,
            '/': ('/', ''),
            '//': ('/', ''),
            '/\\': ('/', '\\'),
            '/.//': ('/', ''),
            'cgi-bin/file1.py': ('/cgi-bin', 'file1.py'),
            '/cgi-bin/file1.py': ('/cgi-bin', 'file1.py'),
            'a': ('/', 'a'),
            '/a': ('/', 'a'),
            '//a': ('/', 'a'),
            './a': ('/', 'a'),
            './C:/': ('/C:', ''),
            '/a/b': ('/a', 'b'),
            '/a/b/': ('/a/b', ''),
            '/a/b/c/..': ('/a/b', ''),
            '/a/b/c/../d': ('/a/b', 'd'),
            '/a/b/c/../d/e/../f': ('/a/b/d', 'f'),
            '/a/b/c/../d/e/../../f': ('/a/b', 'f'),
            '/a/b/c/../d/e/.././././..//f': ('/a/b', 'f'),
            '../a/b/c/../d/e/.././././..//f': IndexError,
            '/a/b/c/../d/e/../../../f': ('/a', 'f'),
            '/a/b/c/../d/e/../../../../f': ('/', 'f'),
            '/a/b/c/../d/e/../../../../../f': IndexError,
            '/a/b/c/../d/e/../../../../f/..': ('/', ''),
        }
        for path, expected in test_vectors.items():
            if isinstance(expected, type) and issubclass(expected, Exception):
                self.assertRaises(expected,
                                  server._url_collapse_path_split, path)
            else:
                actual = server._url_collapse_path_split(path)
                self.assertEquals(expected, actual,
                                  msg='path = %r\nGot:    %r\nWanted: %r' % (
                                  path, actual, expected))

    def test_headers_and_content(self):
        res = self.request('/cgi-bin/file1.py')
        self.assertEquals((b'Hello World\n', 'text/html', 200), \
             (res.read(), res.getheader('Content-type'), res.status))

    def test_post(self):
        params = urllib.parse.urlencode(
            {'spam' : 1, 'eggs' : 'python', 'bacon' : 123456})
        headers = {'Content-type' : 'application/x-www-form-urlencoded'}
        res = self.request('/cgi-bin/file2.py', 'POST', params, headers)

        self.assertEquals(res.read(), b'1, python, 123456\n')

    def test_invaliduri(self):
        res = self.request('/cgi-bin/invalid')
        res.read()
        self.assertEquals(res.status, 404)

    def test_authorization(self):
        headers = {b'Authorization' : b'Basic ' +
                   base64.b64encode(b'username:pass')}
        res = self.request('/cgi-bin/file1.py', 'GET', headers=headers)
        self.assertEquals((b'Hello World\n', 'text/html', 200), \
             (res.read(), res.getheader('Content-type'), res.status))

    def test_no_leading_slash(self):
        # http://bugs.python.org/issue2254
        res = self.request('cgi-bin/file1.py')
        self.assertEquals((b'Hello World\n', 'text/html', 200),
             (res.read(), res.getheader('Content-type'), res.status))


def test_main(verbose=None):
    try:
        cwd = os.getcwd()
        support.run_unittest(BaseHTTPServerTestCase,
                             SimpleHTTPServerTestCase,
                             CGIHTTPServerTestCase
                             )
    finally:
        os.chdir(cwd)

if __name__ == '__main__':
    test_main()
