X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-web.git/blobdiff_plain/426183788de4f8f68adce1a03860294cf446bcf1..dd0fb836097b7f9cc92f8d78c45f1bf2b59c3c1e:/code/main.py diff --git a/code/main.py b/code/main.py index baf4ff9..3be15a6 100755 --- a/code/main.py +++ b/code/main.py @@ -8,21 +8,13 @@ import datetime import hmac import random import sha -import simplejson import sys import time import urllib import socket import cherrypy +from cherrypy import _cperror from StringIO import StringIO -def revertStandardError(): - """Move stderr to stdout, and return the contents of the old stderr.""" - errio = sys.stderr - if not isinstance(errio, StringIO): - return '' - sys.stderr = sys.stdout - errio.seek(0) - return errio.read() def printError(): """Revert stderr to stdout, and print the contents of stderr""" @@ -33,8 +25,6 @@ if __name__ == '__main__': import atexit atexit.register(printError) -import templates -from Cheetah.Template import Template import validation import cache_acls from webcommon import State @@ -45,19 +35,58 @@ from invirt.database import Machine, CDROM, session, connect, MachineAccess, Typ from invirt.config import structs as config from invirt.common import InvalidInput, CodeError -from view import View +from view import View, revertStandardError + +class InvirtUnauthWeb(View): + @cherrypy.expose + @cherrypy.tools.mako(filename="/unauth.mako") + def index(self): + return {'simple': True} class InvirtWeb(View): def __init__(self): super(self.__class__,self).__init__() connect() self._cp_config['tools.require_login.on'] = True + self._cp_config['tools.catch_stderr.on'] = True self._cp_config['tools.mako.imports'] = ['from invirt.config import structs as config', 'from invirt import database'] + self._cp_config['request.error_response'] = self.handle_error + + @cherrypy.expose + @cherrypy.tools.mako(filename="/invalid.mako") + def invalidInput(self): + """Print an error page when an InvalidInput exception occurs""" + err = cherrypy.request.prev.params["err"] + emsg = cherrypy.request.prev.params["emsg"] + d = dict(err_field=err.err_field, + err_value=str(err.err_value), stderr=emsg, + errorMessage=str(err)) + return d + + @cherrypy.expose + @cherrypy.tools.mako(filename="/error.mako") + def error(self): + """Print an error page when an exception occurs""" + op = cherrypy.request.prev.path_info + username = cherrypy.request.login + err = cherrypy.request.prev.params["err"] + emsg = cherrypy.request.prev.params["emsg"] + traceback = cherrypy.request.prev.params["traceback"] + d = dict(op=op, user=username, fields=cherrypy.request.prev.params, + errorMessage=str(err), stderr=emsg, traceback=traceback) + error_raw = cherrypy.request.lookup.get_template("/error_raw.mako") + details = error_raw.render(**d) + exclude = config.web.errormail_exclude + if username not in exclude and '*' not in exclude: + send_error_mail('xvm error on %s for %s: %s' % (op, cherrypy.request.login, err), + details) + d['details'] = details + return d def __getattr__(self, name): if name in ("admin", "overlord"): - if not cherrypy.request.login in getAfsGroupMembers(config.adminacl, config.authz[0].cell): + if not cherrypy.request.login in getAfsGroupMembers(config.adminacl, config.authz.afs.cells[0].cell): raise InvalidInput('username', cherrypy.request.login, 'Not in admin group %s.' % config.adminacl) cherrypy.request.state = State(cherrypy.request.login, isadmin=True) @@ -65,6 +94,20 @@ class InvirtWeb(View): else: return super(InvirtWeb, self).__getattr__(name) + def handle_error(self): + err = sys.exc_info()[1] + if isinstance(err, InvalidInput): + cherrypy.request.params['err'] = err + cherrypy.request.params['emsg'] = revertStandardError() + raise cherrypy.InternalRedirect('/invalidInput') + if not cherrypy.request.prev or 'err' not in cherrypy.request.prev.params: + cherrypy.request.params['err'] = err + cherrypy.request.params['emsg'] = revertStandardError() + cherrypy.request.params['traceback'] = _cperror.format_exc() + raise cherrypy.InternalRedirect('/error') + # fall back to cherrypy default error page + cherrypy.HTTPError(500).set_response() + @cherrypy.expose @cherrypy.tools.mako(filename="/list.mako") def list(self, result=None): @@ -156,10 +199,16 @@ console will suffer artifacts. help._cp_config['tools.require_login.on'] = False def parseCreate(self, fields): - kws = dict([(kw, fields.get(kw)) for kw in 'name description owner memory disksize vmtype cdrom autoinstall'.split() if fields.get(kw)]) - validate = validation.Validate(cherrypy.request.login, cherrypy.request.state, strict=True, **kws) - return dict(contact=cherrypy.request.login, name=validate.name, description=validate.description, memory=validate.memory, - disksize=validate.disksize, owner=validate.owner, machine_type=getattr(validate, 'vmtype', Defaults.type), + kws = dict([(kw, fields[kw]) for kw in + 'name description owner memory disksize vmtype cdrom autoinstall'.split() + if fields[kw]]) + validate = validation.Validate(cherrypy.request.login, + cherrypy.request.state, + strict=True, **kws) + return dict(contact=cherrypy.request.login, name=validate.name, + description=validate.description, memory=validate.memory, + disksize=validate.disksize, owner=validate.owner, + machine_type=getattr(validate, 'vmtype', Defaults.type), cdrom=getattr(validate, 'cdrom', None), autoinstall=getattr(validate, 'autoinstall', None)) @@ -170,7 +219,8 @@ console will suffer artifacts. """Handler for create requests.""" try: parsed_fields = self.parseCreate(fields) - machine = controls.createVm(cherrypy.request.login, cherrypy.request.state, **parsed_fields) + machine = controls.createVm(cherrypy.request.login, + cherrypy.request.state, **parsed_fields) except InvalidInput, err: pass else: @@ -179,8 +229,8 @@ console will suffer artifacts. d = getListDict(cherrypy.request.login, cherrypy.request.state) d['err'] = err if err: - for field in fields.keys(): - setattr(d['defaults'], field, fields.get(field)) + for field, value in fields.items(): + setattr(d['defaults'], field, value) else: d['new_machine'] = parsed_fields['name'] return d @@ -194,17 +244,23 @@ console will suffer artifacts. @cherrypy.expose def errortest(self): """Throw an error, to test the error-tracing mechanisms.""" + print >>sys.stderr, "look ma, it's a stderr" raise RuntimeError("test of the emergency broadcast system") class MachineView(View): - # This is hairy. Fix when CherryPy 3.2 is out. (rename to - # _cp_dispatch, and parse the argument as a list instead of - # string - def __getattr__(self, name): + """Synthesize attributes to allow RESTful URLs like + /machine/13/info. This is hairy. CherryPy 3.2 adds a + method called _cp_dispatch that allows you to explicitly + handle URLs that can't be mapped, and it allows you to + rewrite the path components and continue processing. + + This function gets the next path component being resolved + as a string. _cp_dispatch will get an array of strings + representing any subsequent path components as well.""" + try: - machine_id = int(name) - cherrypy.request.params['machine_id'] = machine_id + cherrypy.request.params['machine_id'] = int(name) return self except ValueError: return None @@ -213,7 +269,9 @@ console will suffer artifacts. @cherrypy.tools.mako(filename="/info.mako") def info(self, machine_id): """Handler for info on a single VM.""" - machine = validation.Validate(cherrypy.request.login, cherrypy.request.state, machine_id=machine_id).machine + machine = validation.Validate(cherrypy.request.login, + cherrypy.request.state, + machine_id=machine_id).machine d = infoDict(cherrypy.request.login, cherrypy.request.state, machine) checkpoint.checkpoint('Got infodict') return d @@ -225,19 +283,24 @@ console will suffer artifacts. def modify(self, machine_id, **fields): """Handler for modifying attributes of a machine.""" try: - modify_dict = modifyDict(cherrypy.request.login, cherrypy.request.state, machine_id, fields) + modify_dict = modifyDict(cherrypy.request.login, + cherrypy.request.state, + machine_id, fields) except InvalidInput, err: result = None - machine = validation.Validate(cherrypy.request.login, cherrypy.request.state, machine_id=machine_id).machine + machine = validation.Validate(cherrypy.request.login, + cherrypy.request.state, + machine_id=machine_id).machine else: machine = modify_dict['machine'] result = 'Success!' err = None - info_dict = infoDict(cherrypy.request.login, cherrypy.request.state, machine) + info_dict = infoDict(cherrypy.request.login, + cherrypy.request.state, machine) info_dict['err'] = err if err: - for field in fields.keys(): - setattr(info_dict['defaults'], field, fields.get(field)) + for field, value in fields.items(): + setattr(info_dict['defaults'], field, value) info_dict['result'] = result return info_dict @@ -263,8 +326,9 @@ console will suffer artifacts. Remember to enable iptables! echo 1 > /proc/sys/net/ipv4/ip_forward """ - machine = validation.Validate(cherrypy.request.login, cherrypy.request.state, machine_id=machine_id).machine - + machine = validation.Validate(cherrypy.request.login, + cherrypy.request.state, + machine_id=machine_id).machine token = controls.vnctoken(machine) host = controls.listHost(machine) if host: @@ -282,43 +346,41 @@ console will suffer artifacts. port=port, authtoken=token) return d + @cherrypy.expose @cherrypy.tools.mako(filename="/command.mako") @cherrypy.tools.require_POST() def command(self, command_name, machine_id, **kwargs): """Handler for running commands like boot and delete on a VM.""" - back = kwargs.get('back', None) + back = kwargs.get('back') + if command_name == 'delete': + back = 'list' try: - d = controls.commandResult(cherrypy.request.login, cherrypy.request.state, command_name, machine_id, kwargs) - if d['command'] == 'Delete VM': - back = 'list' + d = controls.commandResult(cherrypy.request.login, + cherrypy.request.state, + command_name, machine_id, kwargs) except InvalidInput, err: if not back: raise print >> sys.stderr, err - result = err + result = str(err) else: result = 'Success!' if not back: return d if back == 'list': cherrypy.request.state.clear() #Changed global state - raise cherrypy.InternalRedirect('/list?result=%s' % urllib.quote(result)) + raise cherrypy.InternalRedirect('/list?result=%s' + % urllib.quote(result)) elif back == 'info': - raise cherrypy.HTTPRedirect(cherrypy.request.base + '/machine/%d/' % machine_id, status=303) + raise cherrypy.HTTPRedirect(cherrypy.request.base + + '/machine/%d/' % machine_id, + status=303) else: raise InvalidInput('back', back, 'Not a known back page.') machine = MachineView() -def pathSplit(path): - if path.startswith('/'): - path = path[1:] - i = path.find('/') - if i == -1: - i = len(path) - return path[:i], path[i:] - class Checkpoint: def __init__(self): self.start_time = time.time() @@ -334,35 +396,6 @@ class Checkpoint: checkpoint = Checkpoint() -def makeErrorPre(old, addition): - if addition is None: - return - if old: - return old[:-6] + '\n----\n' + str(addition) + '' - else: - return '

STDERR:

' + str(addition) + '
' - -Template.database = database -Template.config = config -Template.err = None - -class JsonDict: - """Class to store a dictionary that will be converted to JSON""" - def __init__(self, **kws): - self.data = kws - if 'err' in kws: - err = kws['err'] - del kws['err'] - self.addError(err) - - def __str__(self): - return simplejson.dumps(self.data) - - def addError(self, text): - """Add stderr text to be displayed on the website.""" - self.data['err'] = \ - makeErrorPre(self.data.get('err'), text) - class Defaults: """Class to store default values for fields.""" memory = 256 @@ -382,17 +415,6 @@ class Defaults: for key in kws: setattr(self, key, kws[key]) - - -DEFAULT_HEADERS = {'Content-Type': 'text/html'} - -def invalidInput(op, username, fields, err, emsg): - """Print an error page when an InvalidInput exception occurs""" - d = dict(op=op, user=username, err_field=err.err_field, - err_value=str(err.err_value), stderr=emsg, - errorMessage=str(err)) - return templates.invalid(searchList=[d]) - def hasVnc(status): """Does the machine with a given status list support VNC?""" if status is None: @@ -420,16 +442,13 @@ def getListDict(username, state): m.uptime = None else: m.uptime = xmlist[m]['uptime'] + installing[m] = bool(xmlist[m].get('autoinstall')) if xmlist[m]['console']: has_vnc[m] = True elif m.type.hvm: has_vnc[m] = "WTF?" else: has_vnc[m] = "ParaVM" - if xmlist[m].get('autoinstall'): - installing[m] = True - else: - installing[m] = False max_memory = validation.maxMemory(username, state) max_disk = validation.maxDisk(username) checkpoint.checkpoint('Got max mem/disk') @@ -511,7 +530,9 @@ def modifyDict(username, state, machine_id, fields): olddisk = {} session.begin() try: - kws = dict([(kw, fields.get(kw)) for kw in 'owner admin contact name description memory vmtype disksize'.split() if fields.get(kw)]) + kws = dict([(kw, fields[kw]) for kw in + 'owner admin contact name description memory vmtype disksize'.split() + if fields[kw]]) kws['machine_id'] = machine_id validate = validation.Validate(username, state, **kws) machine = validate.machine @@ -561,11 +582,6 @@ def modifyDict(username, state, machine_id, fields): controls.renameMachine(machine, oldname, validate.name) return dict(machine=machine) - -def badOperation(u, s, p, e): - """Function called when accessing an unknown URI.""" - return ({'Status': '404 Not Found'}, 'Invalid operation.') - def infoDict(username, state, machine): """Get the variables used by info.tmpl.""" status = controls.statusInfo(machine) @@ -654,20 +670,6 @@ def infoDict(username, state, machine): fields = fields) return d -def unauthFront(_, _2, _3, fields): - """Information for unauth'd users.""" - return templates.unauth(searchList=[{'simple' : True, - 'hostname' : socket.getfqdn()}]) - -mapping = dict( - unauth=unauthFront) - -def printHeaders(headers): - """Print a dictionary as HTTP headers.""" - for key, value in headers.iteritems(): - print '%s: %s' % (key, value) - print - def send_error_mail(subject, body): import subprocess @@ -684,98 +686,4 @@ Subject: %s p.stdin.close() p.wait() -def show_error(op, username, fields, err, emsg, traceback): - """Print an error page when an exception occurs""" - d = dict(op=op, user=username, fields=fields, - errorMessage=str(err), stderr=emsg, traceback=traceback) - details = templates.error_raw(searchList=[d]) - exclude = config.web.errormail_exclude - if username not in exclude and '*' not in exclude: - send_error_mail('xvm error on %s for %s: %s' % (op, username, err), - details) - d['details'] = details - return templates.error(searchList=[d]) - -def handler(username, state, path, fields): - operation, path = pathSplit(path) - if not operation: - operation = 'list' - print 'Starting', operation - fun = mapping.get(operation, badOperation) - return fun(username, state, path, fields) - -class App: - def __init__(self, environ, start_response): - self.environ = environ - self.start = start_response - - self.username = getUser(environ) - self.state = State(self.username) - self.state.environ = environ - - random.seed() #sigh - - def __iter__(self): - start_time = time.time() - database.clear_cache() - sys.stderr = StringIO() - fields = cgi.FieldStorage(fp=self.environ['wsgi.input'], environ=self.environ) - operation = self.environ.get('PATH_INFO', '') - if not operation: - self.start("301 Moved Permanently", [('Location', './')]) - return - if self.username is None: - operation = 'unauth' - - try: - checkpoint.checkpoint('Before') - output = handler(self.username, self.state, operation, fields) - checkpoint.checkpoint('After') - - headers = dict(DEFAULT_HEADERS) - if isinstance(output, tuple): - new_headers, output = output - headers.update(new_headers) - e = revertStandardError() - if e: - if hasattr(output, 'addError'): - output.addError(e) - else: - # This only happens on redirects, so it'd be a pain to get - # the message to the user. Maybe in the response is useful. - output = output + '\n\nstderr:\n' + e - output_string = str(output) - checkpoint.checkpoint('output as a string') - except Exception, err: - if not fields.has_key('js'): - if isinstance(err, InvalidInput): - self.start('200 OK', [('Content-Type', 'text/html')]) - e = revertStandardError() - yield str(invalidInput(operation, self.username, fields, - err, e)) - return - import traceback - self.start('500 Internal Server Error', - [('Content-Type', 'text/html')]) - e = revertStandardError() - s = show_error(operation, self.username, fields, - err, e, traceback.format_exc()) - yield str(s) - return - status = headers.setdefault('Status', '200 OK') - del headers['Status'] - self.start(status, headers.items()) - yield output_string - if fields.has_key('timedebug'): - yield '
%s
' % cgi.escape(str(checkpoint)) - -def constructor(): - connect() - return App - -def main(): - from flup.server.fcgi_fork import WSGIServer - WSGIServer(constructor()).run() - -if __name__ == '__main__': - main() +random.seed() #sigh