Ignore:
Timestamp:
Jun 2, 2008, 11:25:47 PM (16 years ago)
Author:
ecprice
Message:

Put validation behind more abstraction.

File:
1 edited

Legend:

Unmodified
Added
Removed

  • trunk/packages/sipb-xen-www/code/main.py

    r566 r572  
    4242import validation
    4343import cache_acls
    44 from webcommon import InvalidInput, CodeError, g
     44from webcommon import InvalidInput, CodeError, state
    4545import controls
    4646
    … …  
    120120DEFAULT_HEADERS = {'Content-Type': 'text/html'}
    121121
    122 def error(op, user, fields, err, emsg):
     122def error(op, username, fields, err, emsg):
    123123    """Print an error page when a CodeError occurs"""
    124     d = dict(op=op, user=user, errorMessage=str(err),
     124    d = dict(op=op, user=username, errorMessage=str(err),
    125125             stderr=emsg)
    126126    return templates.error(searchList=[d])
    127127
    128 def invalidInput(op, user, fields, err, emsg):
     128def invalidInput(op, username, fields, err, emsg):
    129129    """Print an error page when an InvalidInput exception occurs"""
    130     d = dict(op=op, user=user, err_field=err.err_field,
     130    d = dict(op=op, user=username, err_field=err.err_field,
    131131             err_value=str(err.err_value), stderr=emsg,
    132132             errorMessage=str(err))
    … …  
    143143    return False
    144144
    145 def parseCreate(user, fields):
    146     name = fields.getfirst('name')
    147     if not validation.validMachineName(name):
    148         raise InvalidInput('name', name, 'You must provide a machine name.  Max 22 chars, alnum plus \'-\' and \'_\'.')
    149     name = name.lower()
    150 
    151     if Machine.get_by(name=name):
    152         raise InvalidInput('name', name,
    153                            "Name already exists.")
    154 
    155     owner = validation.testOwner(user, fields.getfirst('owner'))
    156 
    157     memory = fields.getfirst('memory')
    158     memory = validation.validMemory(owner, memory, on=True)
    159 
    160     disk_size = fields.getfirst('disk')
    161     disk_size = validation.validDisk(owner, disk_size)
    162 
    163     vm_type = fields.getfirst('vmtype')
    164     vm_type = validation.validVmType(vm_type)
    165 
    166     cdrom = fields.getfirst('cdrom')
    167     if cdrom is not None and not CDROM.get(cdrom):
    168         raise CodeError("Invalid cdrom type '%s'" % cdrom)
    169 
    170     clone_from = fields.getfirst('clone_from')
    171     if clone_from and clone_from != 'ice3':
    172         raise CodeError("Invalid clone image '%s'" % clone_from)
    173 
    174     return dict(contact=user, name=name, memory=memory, disk_size=disk_size,
    175                 owner=owner, machine_type=vm_type, cdrom=cdrom, clone_from=clone_from)
    176 
    177 def create(user, fields):
     145def parseCreate(username, state, fields):
     146    kws = dict([(kw, fields.getfirst(kw)) for kw in 'name owner memory disksize vmtype cdrom clone_from'.split()])
     147    validate = validation.Validate(username, state, **kws)
     148    return dict(contact=username, name=validate.name, memory=validate.memory,
     149                disksize=validate.disksize, owner=validate.owner, machine_type=validate.vmtype,
     150                cdrom=getattr(validate, 'cdrom', None),
     151                clone_from=getattr(validate, 'clone_from', None))
     152
     153def create(username, state, fields):
    178154    """Handler for create requests."""
    179155    try:
    180         parsed_fields = parseCreate(user, fields)
    181         machine = controls.createVm(**parsed_fields)
     156        parsed_fields = parseCreate(username, state, fields)
     157        machine = controls.createVm(username, **parsed_fields)
    182158    except InvalidInput, err:
    183159        pass
    184160    else:
    185161        err = None
    186     g.clear() #Changed global state
    187     d = getListDict(user)
     162    state.clear() #Changed global state
     163    d = getListDict(username)
    188164    d['err'] = err
    189165    if err:
    … …  
    195171
    196172
    197 def getListDict(user):
     173def getListDict(username, state):
    198174    """Gets the list of local variables used by list.tmpl."""
    199175    checkpoint.checkpoint('Starting')
    200     machines = g.machines
     176    machines = state.machines
    201177    checkpoint.checkpoint('Got my machines')
    202178    on = {}
    203179    has_vnc = {}
    204     xmlist = g.xmlist
     180    xmlist = state.xmlist
    205181    checkpoint.checkpoint('Got uptimes')
    206     can_clone = 'ice3' not in g.xmlist_raw
     182    can_clone = 'ice3' not in state.xmlist_raw
    207183    for m in machines:
    208184        if m not in xmlist:
    … …  
    217193            else:
    218194                has_vnc[m] = "ParaVM"+helppopup("ParaVM Console")
    219     max_memory = validation.maxMemory(user)
    220     max_disk = validation.maxDisk(user)
     195    max_memory = validation.maxMemory(username, state)
     196    max_disk = validation.maxDisk(username)
    221197    checkpoint.checkpoint('Got max mem/disk')
    222198    defaults = Defaults(max_memory=max_memory,
    223199                        max_disk=max_disk,
    224                         owner=user,
     200                        owner=username,
    225201                        cdrom='gutsy-i386')
    226202    checkpoint.checkpoint('Got defaults')
    227203    def sortkey(machine):
    228         return (machine.owner != user, machine.owner, machine.name)
     204        return (machine.owner != username, machine.owner, machine.name)
    229205    machines = sorted(machines, key=sortkey)
    230     d = dict(user=user,
    231              cant_add_vm=validation.cantAddVm(user),
     206    d = dict(user=username,
     207             cant_add_vm=validation.cantAddVm(username, state),
    232208             max_memory=max_memory,
    233209             max_disk=max_disk,
    … …  
    238214    return d
    239215
    240 def listVms(user, fields):
     216def listVms(username, state, fields):
    241217    """Handler for list requests."""
    242218    checkpoint.checkpoint('Getting list dict')
    243     d = getListDict(user)
     219    d = getListDict(username, state)
    244220    checkpoint.checkpoint('Got list dict')
    245221    return templates.list(searchList=[d])
    246222
    247 def vnc(user, fields):
     223def vnc(username, state, fields):
    248224    """VNC applet page.
    249225
    … …  
    265241    echo 1 > /proc/sys/net/ipv4/ip_forward
    266242    """
    267     machine = validation.testMachineId(user, fields.getfirst('machine_id'))
     243    machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine
    268244
    269245    TOKEN_KEY = "0M6W0U1IXexThi5idy8mnkqPKEq1LtEnlK/pZSn0cDrN"
    270246
    271247    data = {}
    272     data["user"] = user
     248    data["user"] = username
    273249    data["machine"] = machine.name
    274250    data["expires"] = time.time()+(5*60)
    … …  
    283259    has_vnc = hasVnc(status)
    284260
    285     d = dict(user=user,
     261    d = dict(user=username,
    286262             on=status,
    287263             has_vnc=has_vnc,
    … …  
    342318    return disk_fields
    343319
    344 def command(user, fields):
     320def command(username, state, fields):
    345321    """Handler for running commands like boot and delete on a VM."""
    346322    back = fields.getfirst('back')
    347323    try:
    348         d = controls.commandResult(user, fields)
     324        d = controls.commandResult(username, state, fields)
    349325        if d['command'] == 'Delete VM':
    350326            back = 'list'
    … …  
    352328        if not back:
    353329            raise
    354         #print >> sys.stderr, err
     330        print >> sys.stderr, err
    355331        result = err
    356332    else:
    … …  
    359335            return templates.command(searchList=[d])
    360336    if back == 'list':
    361         g.clear() #Changed global state
    362         d = getListDict(user)
     337        state.clear() #Changed global state
     338        d = getListDict(username)
    363339        d['result'] = result
    364340        return templates.list(searchList=[d])
    365341    elif back == 'info':
    366         machine = validation.testMachineId(user, fields.getfirst('machine_id'))
     342        machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine
    367343        return ({'Status': '302',
    368344                 'Location': '/info?machine_id=%d' % machine.machine_id},
    … …  
    371347        raise InvalidInput('back', back, 'Not a known back page.')
    372348
    373 def modifyDict(user, fields):
     349def modifyDict(username, state, fields):
    374350    """Modify a machine as specified by CGI arguments.
    375351
    … …  
    379355    transaction = ctx.current.create_transaction()
    380356    try:
    381         machine = validation.testMachineId(user, fields.getfirst('machine_id'))
    382         owner = validation.testOwner(user, fields.getfirst('owner'), machine)
    383         admin = validation.testAdmin(user, fields.getfirst('administrator'),
    384                                      machine)
    385         contact = validation.testContact(user, fields.getfirst('contact'),
    386                                          machine)
    387         name = validation.testName(user, fields.getfirst('name'), machine)
     357        kws = dict([(kw, fields.getfirst(kw)) for kw in 'machine_id owner admin contact name memory vmtype disksize'.split()])
     358        validate = validation.Validate(username, state, **kws)
     359        machine = validate.machine
     360        print >> sys.stderr, machine, machine.administrator, kws['admin']
    388361        oldname = machine.name
    389         command = "modify"
    390 
    391         memory = fields.getfirst('memory')
    392         if memory is not None:
    393             memory = validation.validMemory(owner, memory, machine, on=False)
    394             machine.memory = memory
    395 
    396         vm_type = validation.validVmType(fields.getfirst('vmtype'))
    397         if vm_type is not None:
    398             machine.type = vm_type
    399 
    400         disksize = validation.testDisk(owner, fields.getfirst('disk'))
    401         if disksize is not None:
    402             disksize = validation.validDisk(owner, disksize, machine)
     362
     363        if hasattr(validate, 'memory'):
     364            machine.memory = validate.memory
     365
     366        if hasattr(validate, 'vmtype'):
     367            machine.type = validate.vmtype
     368
     369        if hasattr(validate, 'disksize'):
     370            disksize = validate.disksize
    403371            disk = machine.disks[0]
    404372            if disk.size != disksize:
    … …  
    408376
    409377        update_acl = False
    410         if owner is not None and owner != machine.owner:
    411             machine.owner = owner
     378        if hasattr(validate, 'owner') and validate.owner != machine.owner:
     379            machine.owner = validate.owner
    412380            update_acl = True
    413         if name is not None:
     381        if hasattr(validate, 'name'):
    414382            machine.name = name
    415         if admin is not None and admin != machine.administrator:
    416             machine.administrator = admin
     383        if hasattr(validate, 'admin') and validate.admin != machine.administrator:
     384            machine.administrator = validate.admin
    417385            update_acl = True
    418         if contact is not None:
    419             machine.contact = contact
     386        if hasattr(validate, 'contact'):
     387            machine.contact = validate.contact
    420388
    421389        ctx.current.save(machine)
    422390        if update_acl:
     391            print >> sys.stderr, machine, machine.administrator
    423392            cache_acls.refreshMachine(machine)
    424393        transaction.commit()
    … …  
    428397    for diskname in olddisk:
    429398        controls.resizeDisk(oldname, diskname, str(olddisk[diskname]))
    430     if name is not None:
    431         controls.renameMachine(machine, oldname, name)
    432     return dict(user=user,
    433                 command=command,
     399    if hasattr(validate, 'name'):
     400        controls.renameMachine(machine, oldname, validate.name)
     401    return dict(user=username,
     402                command="modify",
    434403                machine=machine)
    435404
    436 def modify(user, fields):
     405def modify(username, state, fields):
    437406    """Handler for modifying attributes of a machine."""
    438407    try:
    439         modify_dict = modifyDict(user, fields)
     408        modify_dict = modifyDict(username, state, fields)
    440409    except InvalidInput, err:
    441410        result = None
    442         machine = validation.testMachineId(user, fields.getfirst('machine_id'))
     411        machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine
    443412    else:
    444413        machine = modify_dict['machine']
    445414        result = 'Success!'
    446415        err = None
    447     info_dict = infoDict(user, machine)
     416    info_dict = infoDict(username, machine)
    448417    info_dict['err'] = err
    449418    if err:
    … …  
    454423
    455424
    456 def helpHandler(user, fields):
     425def helpHandler(username, state, fields):
    457426    """Handler for help messages."""
    458427    simple = fields.getfirst('simple')
    … …  
    497466        subjects = sorted(help_mapping.keys())
    498467
    499     d = dict(user=user,
     468    d = dict(user=username,
    500469             simple=simple,
    501470             subjects=subjects,
    … …  
    509478    raise CodeError("Unknown operation")
    510479
    511 def infoDict(user, machine):
     480def infoDict(username, machine):
    512481    """Get the variables used by info.tmpl."""
    513482    status = controls.statusInfo(machine)
    … …  
    580549
    581550
    582     max_mem = validation.maxMemory(machine.owner, machine, False)
     551    max_mem = validation.maxMemory(machine.owner, state, machine, False)
    583552    checkpoint.checkpoint('Got mem')
    584553    max_disk = validation.maxDisk(machine.owner, machine)
    … …  
    589558    defaults.disk = "%0.2f" % (machine.disks[0].size/1024.)
    590559    checkpoint.checkpoint('Got defaults')
    591     d = dict(user=user,
     560    d = dict(user=username,
    592561             on=status is not None,
    593562             machine=machine,
    … …  
    602571    return d
    603572
    604 def info(user, fields):
     573def info(username, state, fields):
    605574    """Handler for info on a single VM."""
    606     machine = validation.testMachineId(user, fields.getfirst('machine_id'))
    607     d = infoDict(user, machine)
     575    machine = validation.Validate(username, state, machine_id=fields.getfirst('machine_id')).machine
     576    d = infoDict(username, machine)
    608577    checkpoint.checkpoint('Got infodict')
    609578    return templates.info(searchList=[d])
    610579
    611 def unauthFront(_, fields):
     580def unauthFront(_, _2, fields):
    612581    """Information for unauth'd users."""
    613582    return templates.unauth(searchList=[{'simple' : True}])
    … …  
    629598
    630599
    631 def getUser():
     600def getUser(environ):
    632601    """Return the current user based on the SSL environment variables"""
    633     email = os.environ.get('SSL_CLIENT_S_DN_Email', None)
     602    email = environ.get('SSL_CLIENT_S_DN_Email', None)
    634603    if email is None:
    635604        return None
    636     return email.split("@")[0]
    637 
    638 def main(operation, user, fields):
     605    if not email.endswith('@MIT.EDU'):
     606        return None
     607    return email[:-8]
     608
     609def main(operation, username, state, fields):
    639610    start_time = time.time()
    640611    fun = mapping.get(operation, badOperation)
    … …  
    644615    try:
    645616        checkpoint.checkpoint('Before')
    646         output = fun(u, fields)
     617        output = fun(username, state, fields)
    647618        checkpoint.checkpoint('After')
    648619
    … …  
    653624        e = revertStandardError()
    654625        if e:
     626            if isinstance(output, basestring):
     627                sys.stderr = StringIO()
     628                x = str(output)
     629                print >> sys.stderr, x
     630                print >> sys.stderr, 'XXX'
     631                print >> sys.stderr, e
     632                raise Exception()
    655633            output.addError(e)
    656634        printHeaders(headers)
    … …  
    659637        print output_string
    660638        if fields.has_key('timedebug'):
    661             print '<pre>%s</pre>' % checkpoint
     639            print '<pre>%s</pre>' % cgi.escape(checkpoint)
    662640    except Exception, err:
    663641        if not fields.has_key('js'):
    … …  
    665643                print 'Content-Type: text/html\n'
    666644                e = revertStandardError()
    667                 print error(operation, u, fields, err, e)
     645                print error(operation, state.username, fields, err, e)
    668646                sys.exit(1)
    669647            if isinstance(err, InvalidInput):
    670648                print 'Content-Type: text/html\n'
    671649                e = revertStandardError()
    672                 print invalidInput(operation, u, fields, err, e)
     650                print invalidInput(operation, state.username, fields, err, e)
    673651                sys.exit(1)
    674652        print 'Content-Type: text/plain\n'
    … …  
    690668        logging.getLogger('sqlalchemy.orm.unitofwork').setLevel(logging.INFO)
    691669
    692     u = getUser()
    693     g.user = u
     670    username = getUser(os.environ)
     671    state.username = username
    694672    operation = os.environ.get('PATH_INFO', '')
    695673    if not operation:
    … …  
    697675        print 'Location: ' + os.environ['SCRIPT_NAME']+'/\n'
    698676        sys.exit(0)
    699 
    700     if u is None:
     677    if username is None:
    701678        operation = 'unauth'
    702 
    703679    if operation.startswith('/'):
    704680        operation = operation[1:]
    … …  
    708684    if os.getenv("SIPB_XEN_PROFILE"):
    709685        import profile
    710         profile.run('main(operation, u, fields)', 'log-'+operation)
    711     else:
    712         main(operation, u, fields)
     686        profile.run('main(operation, username, state, fields)', 'log-'+operation)
     687    else:
     688        main(operation, username, state, fields)
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