~chicharreros/magicicada-protocol/trunk

# -*- coding: utf-8 -*-

#

# Copyright 2009-2012 Canonical Ltd.

# Copyright 2015-2018 Chicharreros (https://launchpad.net/~chicharreros)

#

# This program is free software: you can redistribute it and/or modify it

# under the terms of the GNU Affero General Public License version 3,

# as published by the Free Software Foundation.

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# along with this program.  If not, see <http://www.gnu.org/licenses/>.

#

# In addition, as a special exception, the copyright holders give

# permission to link the code of portions of this program with the

# OpenSSL library under certain conditions as described in each

# individual source file, and distribute linked combinations

# including the two.

# You must obey the GNU General Public License in all respects

# for all of the code used other than OpenSSL.  If you modify

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"""A simple client with some tests."""

import os

import time

import math

import random

import zlib

from twisted.internet import reactor, defer

from magicicadaprotocol import request, protocol_pb2

from magicicadaprotocol.client import (

    StorageClientFactory, StorageClient)

from magicicadaprotocol.dircontent_pb2 import (

    DirectoryContent, DIRECTORY)

class NotDirectory(Exception):

    """This wasnt a directory"""

def delay_time(step):

    """generates a delay for each step"""

    return ((math.exp(step) - 1) / 10) / (1 + random.random())

def retry(function):

    """This function will be retried when it raises TRY_AGAIN from the server.

    """

    def inner(self, *args, **kwargs):

        """decorated."""

        def do_retry(failure, step):

            """retry."""

            if failure.check(request.StorageRequestError) \

                    and failure.value.error_message.error.type == \

                    protocol_pb2.Error.TRY_AGAIN:

                print "retry", args

                d = defer.Deferred()

                reactor.callLater(delay_time(step), d.callback, None)

                d.addCallback(lambda _: function(self, *args, **kwargs))

                d.addErrback(do_retry, step + 1)

                return d

            else:

                return failure

        d = function(self, *args, **kwargs)

        d.addErrback(do_retry, 0)

        return d

    return inner

class EasyClient(StorageClient):

    """Simple client that calls a callback on connection."""

    def __init__(self):

        """create a client."""

        StorageClient.__init__(self)

        self.cwd = "/"

        self.cwd_id = None

    def connectionMade(self):

        """Setup and call callback."""

        StorageClient.connectionMade(self)

        self.factory.clientConnectionMade(self)

    def _get_hash(self, node_id):

        """Get the hash of node_id."""

        def _got_query(query):

            """deferred part."""

            message = query[0][1].response[0]

            return message.hash

        d = self.query([(request.ROOT, node_id, request.UNKNOWN_HASH)])

        d.addCallback(_got_query)

        return d

    def _get_content(self, node):

        """get content"""

        d = self._get_hash(node)

        d.addCallback(lambda hash: self.get_content(request.ROOT, node, hash))

        d.addCallback(lambda result: zlib.decompress(result.data))

        return d

    def get_cwd_id(self):

        """get current working directory."""

        d = defer.Deferred()

        if self.cwd_id is None:

            d.addCallback(lambda _: self.get_root())

            d.addCallback(lambda result: setattr(self, "cwd_id", result))

            d.callback(None)

        else:

            d.callback(self.cwd_id)

        return d

    def chdir(self, path):

        """change cwd to path."""

        full_path = os.path.join(self.cwd, path)

        parts = [part for part in full_path.split("/") if part]

        def is_dir_return_id(parent, name):

            """check that this part of the path is a directory and return its

            id.

            """

            d = self._get_content(parent)

            def is_directory(content):

                """parse dircontent to find a directory with name == name."""

                unserialized_content = DirectoryContent()

                unserialized_content.ParseFromString(content)

                for entry in unserialized_content.entries:

                    if entry.name == name and entry.node_type == DIRECTORY:

                        print "is directory", entry

                        return entry.node

                raise NotDirectory("name %s is not a directory" % name)

            d.addCallback(is_directory)

            return d

        d = self.get_root()

        for part in parts:

            d.addCallback(is_dir_return_id, part)

        d.addCallback(lambda x: setattr(self, "cwd_id", x))

        d.addCallback(lambda x: setattr(self, "cwd", full_path))

        return d

    @retry

    def mkfile(self, name):

        """make a file named name in cwd."""

        d = self.get_cwd_id()

        d.addCallback(

            lambda _: self.make_file(request.ROOT, self.cwd_id, name))

        return d

    def mkdir(self, name):

        """make a dir named name in cwd."""

        d = self.get_cwd_id()

        d.addCallback(

            lambda _: self.make_dir(request.ROOT, self.cwd_id, name))

        return d

    def put(self, name, content):

        """put content into file named name."""

        pass

    def get(self, name):

        """get content from file names name."""

        d = self.get_id(name)

        d.addCallback(self._get_content)

        return d

    def unlink(self, name):

        """unlink file named name."""

        d = self.get_id(name)

        d.addCallback(self.unlink)

        return d

    def listdir(self):

        """get a dircontent list for cwd."""

        d = self.get_cwd()

        d.addCallback(self._get_content)

        def make_listdir(content):

            """parse dircontents."""

            result = []

            unserialized_content = DirectoryContent()

            unserialized_content.ParseFromString(content)

            for entry in unserialized_content.entries:

                result.append(entry)

            return result

        d.addCallback(make_listdir)

        return d

    def move(self, name, path, new_name=None):

        """move file."""

        if new_name is None:

            new_name = name

class EasyClientFactory(StorageClientFactory):

    """A test oriented protocol factory."""

    protocol = EasyClient

    def __init__(self, deferrer):

        """create a factory."""

        self.client = None

        self.defer = deferrer

    def clientConnectionMade(self, client_obj):

        """on client connection made."""

        self.client = client_obj

        self.defer.callback(self.client)

    def clientConnectionFailed(self, connector, reason):

        """We failed at connecting."""

        self.defer.errback(reason)

def client(host, port):

    """return a deferred that will succeed with a connected client."""

    d = defer.Deferred()

    factory = EasyClientFactory(d)

    reactor.connectTCP(host, port, factory)

    return d

def authenticated_client(host, port, token="open sesame"):

    """return a deferred that will succeed with an authenticated client."""

    d = client(host, port)

    def auth(client_obj):

        """do the auth."""

        d = client.dummy_authenticate(token)

        d.addCallback(lambda _: client_obj)

        return d

    d.addCallback(auth)

    return d

def skip_error(failure, error):

    """try: except $error: pass errback"""

    if failure.check(request.StorageRequestError) and \

            failure.value.error_message.error.type == error:

        return

    else:

        return failure

def skip_result(_, f, *args, **kwargs):

    """Deferred utilities."""

    return f(*args, **kwargs)

def sr_result(result, f, *args, **kwargs):

    """skip the result when calling the function and then return it."""

    f(*args, **kwargs)

    return result

def log(*args, **kwargs):

    """print args and kwargs."""

    for arg in args:

        print arg,

    print kwargs

def show_error(failure):

    """print the traceback."""

    print failure.getTraceback()

if __name__ == "__main__":

    def create_dirs(client_obj, num_dirs):

        """Create directories."""

        d = defer.succeed(None)

        for i in range(0, num_dirs):

            d.addCallback(skip_result, client_obj.mkdir, "%s" % (i))

            d.addErrback(skip_error, protocol_pb2.Error.ALREADY_EXISTS)

            d.addCallback(skip_result, log, "Directory %s created." % i)

        return d

    def make_files_client(client_obj, number, num_files):

        """Make files."""

        d = client_obj.chdir("%s" % (number))

        for i in range(0, num_files):

            d.addCallback(skip_result, log, "Client %s creating file %s."

                          % (number, i))

            d.addCallback(skip_result, client.mkfile, "%s" % (i))

            d.addCallback(skip_result, log, "Client %s created file %s."

                          % (number, i))

        return d

    NUM_CLIENTS = 200

    NUM_FILES = 50

    port_num = int(open("tmp/magicicada-api.port").read())

    deferred = authenticated_client("localhost", int(port_num))

    deferred.addCallback(create_dirs, NUM_CLIENTS)

    def fire_clients(_):

        """Fire off the client connections."""

        dlist = []

        for i in range(NUM_CLIENTS):

            d = authenticated_client("localhost", int(port_num))

            d.addCallback(sr_result, log, "client", i, "logged in")

            d.addCallback(make_files_client, i, NUM_FILES)

            d.addErrback(show_error)

            dlist.append(d)

        return defer.DeferredList(dlist)

    deferred.addCallback(fire_clients)

    deferred.addCallback(lambda _: reactor.stop())

    deferred.addErrback(show_error)

    print "Starting reactor"

    start_time = time.time()

    reactor.run()