# @author Donovan Preston
#
# Copyright (c) 2007, Linden Research, Inc.
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

from unittest import TestCase, main

from eventlib import api
from eventlib import httpd
from eventlib import processes
from eventlib import util

from greentest import find_command

try:
    from cStringIO import StringIO
except ImportError:
    from StringIO import StringIO

util.wrap_socket_with_coroutine_socket()

class Site(object):
    def handle_request(self, req):
        path = req.path_segments()
        if len(path) > 0 and path[0] == "notexist":
            req.response(404, body='not found')
            return
        req.write('hello world')

    def adapt(self, obj, req):
        req.write(str(obj))


CONTENT_LENGTH = 'content-length'


"""
HTTP/1.1 200 OK
Date: foo
Content-length: 11

hello world
"""

class ConnectionClosed(Exception):
    pass


def read_http(sock):
    fd = sock.makeGreenFile()
    response_line = fd.readline()
    if not response_line:
        raise ConnectionClosed
    raw_headers = fd.readuntil('\r\n\r\n').strip()
    #print "R", response_line, raw_headers
    headers = dict()
    for x in raw_headers.split('\r\n'):
        #print "X", x
        key, value = x.split(': ', 1)
        headers[key.lower()] = value

    if CONTENT_LENGTH in headers:
        num = int(headers[CONTENT_LENGTH])
        body = fd.read(num)
        #print body
    else:
        body = None

    return response_line, headers, body


class TestHttpd(TestCase):
    mode = 'static'
    def setUp(self):
        self.logfile = StringIO()
        self.site = Site()
        self.killer = api.spawn(
            httpd.server, api.tcp_listener(('0.0.0.0', 12346)), self.site, max_size=128, log=self.logfile)

    def tearDown(self):
        api.kill(self.killer)

    def test_001_server(self):
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))

        fd = sock.makeGreenFile()
        fd.write('GET / HTTP/1.0\r\nHost: localhost\r\n\r\n')
        result = fd.read()
        fd.close()
        ## The server responds with the maximum version it supports
        self.assert_(result.startswith('HTTP'), result)
        self.assert_(result.endswith('hello world'))

    def test_002_keepalive(self):
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))

        fd = sock.makeGreenFile()
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        read_http(sock)
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        read_http(sock)
        fd.close()

    def test_003_passing_non_int_to_read(self):
        # This should go in greenio_test
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))

        fd = sock.makeGreenFile()
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        cancel = api.exc_after(1, RuntimeError)
        self.assertRaises(TypeError, fd.read, "This shouldn't work")
        cancel.cancel()
        fd.close()

    def test_004_close_keepalive(self):
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))

        fd = sock.makeGreenFile()
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        read_http(sock)
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\nConnection: close\r\n\r\n')
        read_http(sock)
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        self.assertRaises(ConnectionClosed, read_http, sock)
        fd.close()

    def skip_test_005_run_apachebench(self):
        url = 'http://localhost:12346/'
        # ab is apachebench
        out = processes.Process(find_command('ab'),
                                ['-c','64','-n','1024', '-k', url])
        print out.read()

    def test_006_reject_long_urls(self):
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))
        path_parts = []
        for ii in range(3000):
            path_parts.append('path')
        path = '/'.join(path_parts)
        request = 'GET /%s HTTP/1.0\r\nHost: localhost\r\n\r\n' % path
        fd = sock.makeGreenFile()
        fd.write(request)
        result = fd.readline()
        status = result.split(' ')[1]
        self.assertEqual(status, '414')
        fd.close()

    def test_007_get_arg(self):
        # define a new handler that does a get_arg as well as a read_body
        def new_handle_request(req):
            a = req.get_arg('a')
            body = req.read_body()
            req.write('a is %s, body is %s' % (a, body))
        self.site.handle_request = new_handle_request

        sock = api.connect_tcp(
            ('127.0.0.1', 12346))
        request = '\r\n'.join((
            'POST /%s HTTP/1.0',
            'Host: localhost',
            'Content-Length: 3',
            '',
            'a=a'))
        fd = sock.makeGreenFile()
        fd.write(request)

        # send some junk after the actual request
        fd.write('01234567890123456789')
        reqline, headers, body = read_http(sock)
        self.assertEqual(body, 'a is a, body is a=a')
        fd.close()

    def test_008_correctresponse(self):
        sock = api.connect_tcp(
            ('127.0.0.1', 12346))

        fd = sock.makeGreenFile()
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        response_line_200,_,_ = read_http(sock)
        fd.write('GET /notexist HTTP/1.1\r\nHost: localhost\r\n\r\n')
        response_line_404,_,_ = read_http(sock)
        fd.write('GET / HTTP/1.1\r\nHost: localhost\r\n\r\n')
        response_line_test,_,_ = read_http(sock)
        self.assertEqual(response_line_200,response_line_test)
        fd.close()


if __name__ == '__main__':
    main()