odata.py 12 KB
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from __future__ import absolute_import, division, print_function, unicode_literals
try:
    from urllib.parse import urlencode  # pylint: disable=F0401,E0611
except ImportError:
    from urllib import urlencode  # pylint: disable=F0401,E0611

import requests
from requests.auth import HTTPBasicAuth

from lxml import etree
try:
    from configparser import SafeConfigParser  # pylint: disable=F0401
except ImportError:
    from ConfigParser import SafeConfigParser  # pylint: disable=F0401
import uuid
from dateutil.parser import parse as tsparse

namespaces = {
    'b': "http://www.w3.org/2007/app",
    'atom': "http://www.w3.org/2005/Atom",
    'ds': "http://schemas.microsoft.com/ado/2007/08/dataservices",
    'm': "http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"
    }


def namespace_split(tagname):
    if not '}' in tagname:
        return ('', tagname)
    namespace, tag = tagname.split('}')
    namespace = namespace[1:]
    return (namespace, tag)


def ns(namespace, name):
    return "{" + namespaces[namespace] + "}" + name


def is_string(value):
    try:
        return isinstance(value, basestring)  # pylint: disable=E0602
    except NameError:
        return isinstance(value, str)  # pylint: disable=E0602


def type_encode_argvalue(value):
    if type(value) == uuid.UUID:
        return "guid'{}'".format(value)
    if is_string(value):
        return "'{}'".format(value)
    return value


class ODataException(Exception):
    def __init__(self, error_type, error_message, full_error):
        self.error_type = error_type
        self.error_message = error_message
        self.full_error = full_error


class Client(object):
    passman = None

    def __init__(self, baseurl, username, password):
        self.baseurl = baseurl
        self.auth = HTTPBasicAuth(username, password)

    def _format_url(self, resource, query=None, args=None, subresource=None):
        url = self.baseurl
        fragments = {}
        if resource:
            url += "/" + resource
        if args:
            argstr = ",".join(("{key}={value}".format(key=key, value=type_encode_argvalue(value)) for key, value in args.items()))
            url = "{url}({argstr})".format(url=url, argstr=argstr)
        if subresource:
            url += "/" + subresource
        if query:
            argstr = " and ".join(("{key} eq {value}".format(key=key, value=type_encode_argvalue(query[key])) for key in query))
            fragments["$filter"] = argstr
        if fragments:
            url += "?" + urlencode(fragments)
        return url

    def _do_request(self, url, method="GET", reqdata=None):
        headers = {}
        if reqdata:
            headers["content-type"] = "application/atom+xml;type=entry"
        resp = requests.request(method, url, data=reqdata, headers=headers, auth=self.auth, verify=False)
        data = resp.content
        if not data:
            return None
        if resp.status_code >= 300:
            try:
                error_doc = etree.fromstring(data)
                errtype = ", ".join(error_doc.xpath('/m:error/m:innererror/m:type/text()', namespaces=namespaces))
                errmsg = ", ".join(error_doc.xpath('/m:error/m:innererror/m:message/text()', namespaces=namespaces))
                if not errmsg:
                    errmsg = error_doc.xpath('/m:error/m:message/text()', namespaces=namespaces)[0]
                print("Request failed with error: " + errtype)
                print(errmsg)
                print(data)
                raise ODataException(errtype, errmsg, error_doc)
            except etree.XMLSyntaxError as e2:
                print("Did not get xml error from SPF")
                print(data)
                raise e2
            except AttributeError as e2:
                print(e2)
        try:
            return etree.fromstring(data)
        except etree.XMLSyntaxError as e:
            print(e)
            print("Content that caused the issue:")
            print(data)
            print()
            raise e

    def get_collections(self):
        url = self._format_url(resource="")
        collections = self._do_request(url)
        return (collection for collection in collections.xpath('/b:service/b:workspace/b:collection/atom:title/text()', namespaces=namespaces))

    def query_collection(self, collection, query=None, **kw_args):
        url = self._format_url(collection, query, kw_args)
        collection = self._do_request(url)
        result = []
        for entry in collection.xpath('/atom:feed/atom:entry', namespaces=namespaces):
            result.append(Entry(entry, self))
        return result

    def get_from_collection(self, collection, subresource=None, **kw_args):
        url = self._format_url(collection, query=None, args=kw_args, subresource=subresource)
        collection = self._do_request(url)
        for entry in collection.xpath('/atom:entry', namespaces=namespaces):
            return Entry(entry, self)
        return None

    def delete_from_collection(self, collection, subresource=None, **kw_args):
        url = self._format_url(collection, query=None, args=kw_args, subresource=subresource)
        self._do_request(url, method="DELETE")

    def delete_resource(self, res):
        url = self.baseurl + "/" + res
        self._do_request(url, method="DELETE")

    def get_resource(self, url):
        repl = self._do_request(self.baseurl + "/" + url)
        if repl is None:
            return []
        if repl.tag == ns('atom', 'feed'):
            return [Entry(entry, self) for entry in repl.xpath('/atom:feed/atom:entry', namespaces=namespaces)]
        else:
            return Entry(repl, self)

    def create_link(self, links_collection, target):
        url = self.baseurl + "/" + links_collection
        entry, obj = create_entry()
        add_property(obj, "ID", target)
        res = self._do_request(url, "POST", etree.tostring(entry))
        return res


class Entry(object):
    def __init__(self, element, vmm_client):
        self.vmm_client = vmm_client
        self.element = element
        self.properties = self.parse_properties(element)
        self.resources = self.parse_resources(element)

    def get_resource(self, resource):
        return self.vmm_client.get_resource(self.resources[resource])

    def parse_resources(self, element):
        resources = {}
        for link in element.xpath("atom:link", namespaces=namespaces):
            rel = link.get('rel')
            if rel == "edit":
                next
            title = link.get('title')
            href = link.get('href')
            resources[title] = href
        return resources

    def parse_property(self, prop):
        inttypes = set(("Edm.Int32", "Edm.Int64", "Edm.Byte", "Edm.Int16"))
        collectiontypes = set(("VMM.ErrorInfo", "VMM.UserAndRole", "VMM.VPNVMNetworkGateway"))
        if prop.get(ns("m", "null")) == "true":
            return None
        property_type = prop.get(ns("m", "type"))
        if not property_type:
            return prop.text
        if property_type == "Edm.Boolean":
            if prop.text == "true":
                return True
            return False
        if property_type in inttypes:
            return int(prop.text)
        if property_type == "Edm.Guid":
            return uuid.UUID(prop.text)
        if property_type == "Edm.DateTime":
            return tsparse(prop.text)
        if property_type in collectiontypes or property_type.startswith("Collection("):
            return self.parse_properties(prop, "*")

    def parse_properties(self, prop, xpath="atom:content/m:properties/*"):
        element = {}
        for tag in prop.xpath(xpath, namespaces=namespaces):
            (namespace, tagname) = namespace_split(tag.tag)
            if namespace == namespaces['ds']:
                key = tagname
            else:
                key = tag.tag
            element[key] = self.parse_property(tag)
        return element


def create_entry():
    entry = etree.Element(ns('atom', 'entry'))
    content = etree.SubElement(entry, ns('atom', 'content'))
    content.set("type", "application/xml")
    vm = etree.SubElement(content, ns('m', "properties"))
    return entry, vm


def add_property(tag, key, value, datatype=None):
    prop = etree.SubElement(tag, ns('ds', key))
    if type(value) == uuid.UUID:
        prop.set(ns('m', 'type'), "Edm.Guid")
        prop.text = str(value)
    elif type(value) == bool:
        prop.set(ns('m', 'type'), "Edm.Boolean")
        if value:
            prop.text = "true"
        else:
            prop.text = "false"
    elif type(value) == int:
        prop.set(ns('m', 'type'), "Edm.Int64")
        prop.text = value
    else:
        prop.text = value
    if datatype:
        prop.set(ns('m', 'type'), datatype)
    return prop


class VMMClient(Client):
    def create_vm(self, StampId, Name, CloudId, **kwargs):
        entry, vm = create_entry()
        add_property(vm, "StampId", StampId)
        add_property(vm, "CloudId", CloudId)
        add_property(vm, "Name", Name)
        add_property(vm, "NewVirtualNetworkAdapterInput", "", datatype="Collection(VMM.NewVMVirtualNetworkAdapterInput)")
        for key, value in kwargs.items():
            if value == "":
                print("skipping empty value")
            else:
                add_property(vm, key, value)
#        print(etree.tostring(entry, pretty_print=True))
        result = Entry(self._do_request(self._format_url("VirtualMachines"), method="POST", reqdata=etree.tostring(entry)), self)
        return result

    def get_vm(self, stampid, vmid):
        return self.get_from_collection("VirtualMachines", StampId=stampid, ID=vmid)

    def delete_vm(self, stampid, vmid):
        self.delete_from_collection("VirtualMachines", StampId=stampid, ID=vmid)

    def vm_operation(self, stampid, vmid, operation):
        url = self._format_url("VirtualMachines", args={"StampId": stampid, "ID": vmid})
        entry, vm = create_entry()
        add_property(vm, "StampId", stampid)
        add_property(vm, "ID", vmid)
        add_property(vm, "Operation", operation)
        self._do_request(url, method="PATCH", reqdata=etree.tostring(entry))

    def get_vm_addresses(self, stampid, vmid):
        addresses = []
        try:
            guest_infos = self.query_collection("GuestInfos", query={"StampId": stampid, "VMId": vmid})
            for guest_info in guest_infos:
                addresses += guest_info.properties["IPv4Addresses"].split(";")
                print(addresses)
        except:
            pass
        addresses = [a for a in addresses if a]
        addresses = [a for a in addresses if a != "127.0.0.1"]
        return addresses

    def get_job(self, stampid, jobid):
        return self.get_from_collection("Jobs", StampId=stampid, ID=jobid)


def get_config():
    cfg = SafeConfigParser()
    cfg.read("nova.cfg")
    return cfg

ALL_COLLECTIONS = (
    'ApplicationHostTemplates',
    'ApplicationHosts',
    'BasicStatistics',
    'CapabilityProfiles',
    'CloudCapacities',
    'Clouds',
    'ComputerTierTemplates',
    'ComputerTiers',
    'GuestInfos',
    'HardwareProfiles',
    'ISOs',
    'Jobs',
    'LibraryShares',
    'LogicalNetworks',
    'PerformanceData',
    'QuotaAndUsageComponents',
    'RunAsAccounts',
    'ServiceTemplates',
    'Services',
    'StaticIPAddressPools',
    'UserRoles',
    'VMCheckPoints',
    'VMNetworks',
    'VMSubnets',
    'VMTemplates',
    'VirtualDVDDrives',
    'VirtualDiskDrives',
    'VirtualHardDisks',
    'VirtualMachines',
    'VirtualNetworkAdapters',
    'VirtualSCSIAdapters',
    )

NO_NEEDED_PARAMETER = (
    "BasicStatistics",
    "Clouds",
    "ComputerTierTemplates",
    "ComputerTiers",
    "HardwareProfiles",
    "ServiceTemplates",
    "Services",
    "UserRoles",
    "VMNetworks",
    "VMTemplates"
    "VirtualMachines",
    )
NEED_STAMPID = (
    "CapabilityProfiles",
    "CloudCapacities",
    "Jobs",
    "LibraryShares",
    "LogicalNetworks",
    'RunAsAccounts',
    "StaticIPAddressPools",
    "VMCheckPoints",
    "VMSubnets",
    'VirtualHardDisks',
    "VirtualDiskDrives",
    'VirtualNetworkAdapters',
    )
NEEDS_STAMPID_VMID = ("GuestInfos", "PerformanceData", )
NEED_MORE = ("QuotaAndUsageComponents",)