src/allmydata/webish.py

   1
   2 from base64 import b32encode
   3 import os.path
   4 from twisted.application import service, strports, internet
   5 from twisted.web import static, resource, server, html, http
   6 from twisted.python import util, log
   7 from twisted.internet import defer
   8 from twisted.internet.interfaces import IConsumer
   9 from nevow import inevow, rend, loaders, appserver, url, tags as T
  10 from nevow.static import File as nevow_File # TODO: merge with static.File?
  11 from allmydata.util import fileutil
  12 import simplejson
  13 from allmydata.interfaces import IDownloadTarget, IDirectoryNode, IFileNode, \
  14      IMutableFileNode
  15 from allmydata import download
  16 from allmydata.upload import FileHandle, FileName
  17 from allmydata import provisioning
  18 from allmydata import get_package_versions_string
  19 from zope.interface import implements, Interface
  20 import urllib
  21 from formless import webform
  22
  23 def getxmlfile(name):
  24     return loaders.xmlfile(util.sibpath(__file__, "web/%s" % name))
  25
  26 class IClient(Interface):
  27     pass
  28 class ILocalAccess(Interface):
  29     def local_access_is_allowed():
  30         """Return True if t=upload&localdir= is allowed, giving anyone who
  31         can talk to the webserver control over the local (disk) filesystem."""
  32
  33 def boolean_of_arg(arg):
  34     assert arg.lower() in ("true", "t", "1", "false", "f", "0")
  35     return arg.lower() in ("true", "t", "1")
  36
  37 def get_arg(req, argname, default=None, multiple=False):
  38     """Extract an argument from either the query args (req.args) or the form
  39     body fields (req.fields). If multiple=False, this returns a single value
  40     (or the default, which defaults to None), and the query args take
  41     precedence. If multiple=True, this returns a tuple of arguments (possibly
  42     empty), starting with all those in the query args.
  43     """
  44     results = []
  45     if argname in req.args:
  46         results.extend(req.args[argname])
  47     if req.fields and argname in req.fields:
  48         results.append(req.fields[argname].value)
  49     if multiple:
  50         return tuple(results)
  51     if results:
  52         return results[0]
  53     return default
  54
  55 # we must override twisted.web.http.Request.requestReceived with a version
  56 # that doesn't use cgi.parse_multipart() . Since we actually use Nevow, we
  57 # override the nevow-specific subclass, nevow.appserver.NevowRequest . This
  58 # is an exact copy of twisted.web.http.Request (from SVN HEAD on 10-Aug-2007)
  59 # that modifies the way form arguments are parsed. Note that this sort of
  60 # surgery may induce a dependency upon a particular version of twisted.web
  61
  62 parse_qs = http.parse_qs
  63 class MyRequest(appserver.NevowRequest):
  64     fields = None
  65     def requestReceived(self, command, path, version):
  66         """Called by channel when all data has been received.
  67
  68         This method is not intended for users.
  69         """
  70         self.content.seek(0,0)
  71         self.args = {}
  72         self.stack = []
  73
  74         self.method, self.uri = command, path
  75         self.clientproto = version
  76         x = self.uri.split('?', 1)
  77
  78         if len(x) == 1:
  79             self.path = self.uri
  80         else:
  81             self.path, argstring = x
  82             self.args = parse_qs(argstring, 1)
  83
  84         # cache the client and server information, we'll need this later to be
  85         # serialized and sent with the request so CGIs will work remotely
  86         self.client = self.channel.transport.getPeer()
  87         self.host = self.channel.transport.getHost()
  88
  89         # Argument processing.
  90
  91 ##      The original twisted.web.http.Request.requestReceived code parsed the
  92 ##      content and added the form fields it found there to self.args . It
  93 ##      did this with cgi.parse_multipart, which holds the arguments in RAM
  94 ##      and is thus unsuitable for large file uploads. The Nevow subclass
  95 ##      (nevow.appserver.NevowRequest) uses cgi.FieldStorage instead (putting
  96 ##      the results in self.fields), which is much more memory-efficient.
  97 ##      Since we know we're using Nevow, we can anticipate these arguments
  98 ##      appearing in self.fields instead of self.args, and thus skip the
  99 ##      parse-content-into-self.args step.
 100
 101 ##      args = self.args
 102 ##      ctype = self.getHeader('content-type')
 103 ##      if self.method == "POST" and ctype:
 104 ##          mfd = 'multipart/form-data'
 105 ##          key, pdict = cgi.parse_header(ctype)
 106 ##          if key == 'application/x-www-form-urlencoded':
 107 ##              args.update(parse_qs(self.content.read(), 1))
 108 ##          elif key == mfd:
 109 ##              try:
 110 ##                  args.update(cgi.parse_multipart(self.content, pdict))
 111 ##              except KeyError, e:
 112 ##                  if e.args[0] == 'content-disposition':
 113 ##                      # Parse_multipart can't cope with missing
 114 ##                      # content-dispostion headers in multipart/form-data
 115 ##                      # parts, so we catch the exception and tell the client
 116 ##                      # it was a bad request.
 117 ##                      self.channel.transport.write(
 118 ##                              "HTTP/1.1 400 Bad Request\r\n\r\n")
 119 ##                      self.channel.transport.loseConnection()
 120 ##                      return
 121 ##                  raise
 122
 123         self.process()
 124
 125 class Directory(rend.Page):
 126     addSlash = True
 127     docFactory = getxmlfile("directory.xhtml")
 128
 129     def __init__(self, rootname, dirnode, dirpath):
 130         self._rootname = rootname
 131         self._dirnode = dirnode
 132         self._dirpath = dirpath
 133
 134     def dirpath_as_string(self):
 135         return "/" + "/".join(self._dirpath)
 136
 137     def render_title(self, ctx, data):
 138         return ctx.tag["Directory '%s':" % self.dirpath_as_string()]
 139
 140     def render_header(self, ctx, data):
 141         parent_directories = ("<%s>" % self._rootname,) + self._dirpath
 142         num_dirs = len(parent_directories)
 143
 144         header = ["Directory '"]
 145         for i,d in enumerate(parent_directories):
 146             upness = num_dirs - i - 1
 147             if upness:
 148                 link = "/".join( ("..",) * upness )
 149             else:
 150                 link = "."
 151             header.append(T.a(href=link)[d])
 152             if upness != 0:
 153                 header.append("/")
 154         header.append("'")
 155
 156         if self._dirnode.is_readonly():
 157             header.append(" (readonly)")
 158         header.append(":")
 159         return ctx.tag[header]
 160
 161     def render_welcome(self, ctx, data):
 162         depth = len(self._dirpath) + 2
 163         link = "/".join([".."] * depth)
 164         return T.div[T.a(href=link)["Return to Welcome page"]]
 165
 166     def data_children(self, ctx, data):
 167         d = self._dirnode.list()
 168         d.addCallback(lambda dict: sorted(dict.items()))
 169         return d
 170
 171     def render_row(self, ctx, data):
 172         name, (target, metadata) = data
 173
 174         if self._dirnode.is_readonly():
 175             delete = "-"
 176             rename = "-"
 177         else:
 178             # this creates a button which will cause our child__delete method
 179             # to be invoked, which deletes the file and then redirects the
 180             # browser back to this directory
 181             delete = T.form(action=url.here, method="post")[
 182                 T.input(type='hidden', name='t', value='delete'),
 183                 T.input(type='hidden', name='name', value=name),
 184                 T.input(type='hidden', name='when_done', value=url.here),
 185                 T.input(type='submit', value='del', name="del"),
 186                 ]
 187
 188             rename = T.form(action=url.here, method="get")[
 189                 T.input(type='hidden', name='t', value='rename-form'),
 190                 T.input(type='hidden', name='name', value=name),
 191                 T.input(type='hidden', name='when_done', value=url.here),
 192                 T.input(type='submit', value='rename', name="rename"),
 193                 ]
 194
 195         ctx.fillSlots("delete", delete)
 196         ctx.fillSlots("rename", rename)
 197         check = T.form(action=url.here, method="post")[
 198             T.input(type='hidden', name='t', value='check'),
 199             T.input(type='hidden', name='name', value=name),
 200             T.input(type='hidden', name='when_done', value=url.here),
 201             T.input(type='submit', value='check', name="check"),
 202             ]
 203         ctx.fillSlots("overwrite", self.build_overwrite(ctx, (name, target)))
 204         ctx.fillSlots("check", check)
 205
 206         # build the base of the uri_link link url
 207         uri_link = "/uri/" + urllib.quote(target.get_uri())
 208
 209         assert (IFileNode.providedBy(target)
 210                 or IDirectoryNode.providedBy(target)
 211                 or IMutableFileNode.providedBy(target)), target
 212
 213         if IMutableFileNode.providedBy(target):
 214             # file
 215
 216             # add the filename to the uri_link url
 217             uri_link += '?%s' % (urllib.urlencode({'filename': name}),)
 218
 219             # to prevent javascript in displayed .html files from stealing a
 220             # secret directory URI from the URL, send the browser to a URI-based
 221             # page that doesn't know about the directory at all
 222             #dlurl = urllib.quote(name)
 223             dlurl = uri_link
 224
 225             ctx.fillSlots("filename",
 226                           T.a(href=dlurl)[html.escape(name)])
 227             ctx.fillSlots("type", "SSK")
 228
 229             ctx.fillSlots("size", "?")
 230
 231             text_plain_link = uri_link + "?filename=foo.txt"
 232             text_plain_tag = T.a(href=text_plain_link)["text/plain"]
 233
 234         elif IFileNode.providedBy(target):
 235             # file
 236
 237             # add the filename to the uri_link url
 238             uri_link += '?%s' % (urllib.urlencode({'filename': name}),)
 239
 240             # to prevent javascript in displayed .html files from stealing a
 241             # secret directory URI from the URL, send the browser to a URI-based
 242             # page that doesn't know about the directory at all
 243             #dlurl = urllib.quote(name)
 244             dlurl = uri_link
 245
 246             ctx.fillSlots("filename",
 247                           T.a(href=dlurl)[html.escape(name)])
 248             ctx.fillSlots("type", "FILE")
 249
 250             ctx.fillSlots("size", target.get_size())
 251
 252             text_plain_link = uri_link + "?filename=foo.txt"
 253             text_plain_tag = T.a(href=text_plain_link)["text/plain"]
 254
 255         elif IDirectoryNode.providedBy(target):
 256             # directory
 257             subdir_url = urllib.quote(name)
 258             ctx.fillSlots("filename",
 259                           T.a(href=subdir_url)[html.escape(name)])
 260             if target.is_readonly():
 261                 dirtype = "DIR-RO"
 262             else:
 263                 dirtype = "DIR"
 264             ctx.fillSlots("type", dirtype)
 265             ctx.fillSlots("size", "-")
 266             text_plain_tag = None
 267
 268         childdata = [T.a(href="%s?t=json" % name)["JSON"], ", ",
 269                      T.a(href="%s?t=uri" % name)["URI"], ", ",
 270                      T.a(href="%s?t=readonly-uri" % name)["readonly-URI"], ", ",
 271                      T.a(href=uri_link)["URI-link"],
 272                      ]
 273         if text_plain_tag:
 274             childdata.extend([", ", text_plain_tag])
 275
 276         ctx.fillSlots("data", childdata)
 277
 278         try:
 279             checker = IClient(ctx).getServiceNamed("checker")
 280         except KeyError:
 281             checker = None
 282         if checker:
 283             d = defer.maybeDeferred(checker.checker_results_for,
 284                                     target.get_verifier())
 285             def _got(checker_results):
 286                 recent_results = reversed(checker_results[-5:])
 287                 if IFileNode.providedBy(target):
 288                     results = ("[" +
 289                                ", ".join(["%d/%d" % (found, needed)
 290                                           for (when,
 291                                                (needed, total, found, sharemap))
 292                                           in recent_results]) +
 293                                "]")
 294                 elif IDirectoryNode.providedBy(target):
 295                     results = ("[" +
 296                                "".join([{True:"+",False:"-"}[res]
 297                                         for (when, res) in recent_results]) +
 298                                "]")
 299                 else:
 300                     results = "%d results" % len(checker_results)
 301                 return results
 302             d.addCallback(_got)
 303             results = d
 304         else:
 305             results = "--"
 306         # TODO: include a link to see more results, including timestamps
 307         # TODO: use a sparkline
 308         ctx.fillSlots("checker_results", results)
 309
 310         return ctx.tag
 311
 312     def render_forms(self, ctx, data):
 313         if self._dirnode.is_readonly():
 314             return T.div["No upload forms: directory is read-only"]
 315         mkdir = T.form(action=".", method="post",
 316                        enctype="multipart/form-data")[
 317             T.fieldset[
 318             T.input(type="hidden", name="t", value="mkdir"),
 319             T.input(type="hidden", name="when_done", value=url.here),
 320             T.legend(class_="freeform-form-label")["Create a new directory"],
 321             "New directory name: ",
 322             T.input(type="text", name="name"), " ",
 323             T.input(type="submit", value="Create"),
 324             ]]
 325
 326         upload = T.form(action=".", method="post",
 327                         enctype="multipart/form-data")[
 328             T.fieldset[
 329             T.input(type="hidden", name="t", value="upload"),
 330             T.input(type="hidden", name="when_done", value=url.here),
 331             T.legend(class_="freeform-form-label")["Upload a file to this directory"],
 332             "Choose a file to upload: ",
 333             T.input(type="file", name="file", class_="freeform-input-file"),
 334             " ",
 335             T.input(type="submit", value="Upload"),
 336             " Mutable?:",
 337             T.input(type="checkbox", name="mutable"),
 338             ]]
 339
 340         mount = T.form(action=".", method="post",
 341                         enctype="multipart/form-data")[
 342             T.fieldset[
 343             T.input(type="hidden", name="t", value="uri"),
 344             T.input(type="hidden", name="when_done", value=url.here),
 345             T.legend(class_="freeform-form-label")["Attach a file or directory"
 346                                                    " (by URI) to this"
 347                                                    " directory"],
 348             "New child name: ",
 349             T.input(type="text", name="name"), " ",
 350             "URI of new child: ",
 351             T.input(type="text", name="uri"), " ",
 352             T.input(type="submit", value="Attach"),
 353             ]]
 354         return [T.div(class_="freeform-form")[mkdir],
 355                 T.div(class_="freeform-form")[upload],
 356                 T.div(class_="freeform-form")[mount],
 357                 ]
 358
 359     def build_overwrite(self, ctx, data):
 360         name, target = data
 361         if IMutableFileNode.providedBy(target) and not target.is_readonly():
 362             action="/uri/" + urllib.quote(target.get_uri())
 363             overwrite = T.form(action=action, method="post",
 364                                enctype="multipart/form-data")[
 365                 T.fieldset[
 366                 T.input(type="hidden", name="t", value="overwrite"),
 367                 T.input(type='hidden', name='name', value=name),
 368                 T.input(type='hidden', name='when_done', value=url.here),
 369                 T.legend(class_="freeform-form-label")["Overwrite"],
 370                 "Choose new file: ",
 371                 T.input(type="file", name="file", class_="freeform-input-file"),
 372                 " ",
 373                 T.input(type="submit", value="Overwrite")
 374                 ]]
 375             return [T.div(class_="freeform-form")[overwrite],]
 376         else:
 377             return []
 378
 379     def render_results(self, ctx, data):
 380         req = inevow.IRequest(ctx)
 381         return get_arg(req, "results", "")
 382
 383 class WebDownloadTarget:
 384     implements(IDownloadTarget, IConsumer)
 385     def __init__(self, req, content_type, content_encoding, save_to_file):
 386         self._req = req
 387         self._content_type = content_type
 388         self._content_encoding = content_encoding
 389         self._opened = False
 390         self._producer = None
 391         self._save_to_file = save_to_file
 392
 393     def registerProducer(self, producer, streaming):
 394         self._req.registerProducer(producer, streaming)
 395     def unregisterProducer(self):
 396         self._req.unregisterProducer()
 397
 398     def open(self, size):
 399         self._opened = True
 400         self._req.setHeader("content-type", self._content_type)
 401         if self._content_encoding:
 402             self._req.setHeader("content-encoding", self._content_encoding)
 403         self._req.setHeader("content-length", str(size))
 404         if self._save_to_file is not None:
 405             # tell the browser to save the file rather display it
 406             # TODO: quote save_to_file properly
 407             self._req.setHeader("content-disposition",
 408                                 'attachment; filename="%s"'
 409                                 % self._save_to_file)
 410
 411     def write(self, data):
 412         self._req.write(data)
 413     def close(self):
 414         self._req.finish()
 415
 416     def fail(self, why):
 417         if self._opened:
 418             # The content-type is already set, and the response code
 419             # has already been sent, so we can't provide a clean error
 420             # indication. We can emit text (which a browser might interpret
 421             # as something else), and if we sent a Size header, they might
 422             # notice that we've truncated the data. Keep the error message
 423             # small to improve the chances of having our error response be
 424             # shorter than the intended results.
 425             #
 426             # We don't have a lot of options, unfortunately.
 427             self._req.write("problem during download\n")
 428         else:
 429             # We haven't written anything yet, so we can provide a sensible
 430             # error message.
 431             msg = str(why.type)
 432             msg.replace("\n", "|")
 433             self._req.setResponseCode(http.GONE, msg)
 434             self._req.setHeader("content-type", "text/plain")
 435             # TODO: HTML-formatted exception?
 436             self._req.write(str(why))
 437         self._req.finish()
 438
 439     def register_canceller(self, cb):
 440         pass
 441     def finish(self):
 442         pass
 443
 444 class FileDownloader(resource.Resource):
 445     def __init__(self, filenode, name):
 446         assert (IFileNode.providedBy(filenode)
 447                 or IMutableFileNode.providedBy(filenode))
 448         self._filenode = filenode
 449         self._name = name
 450
 451     def render(self, req):
 452         gte = static.getTypeAndEncoding
 453         type, encoding = gte(self._name,
 454                              static.File.contentTypes,
 455                              static.File.contentEncodings,
 456                              defaultType="text/plain")
 457         save_to_file = None
 458         if get_arg(req, "save", False):
 459             # TODO: make the API specification clear: should "save=" or
 460             # "save=false" count?
 461             save_to_file = self._name
 462         wdt = WebDownloadTarget(req, type, encoding, save_to_file)
 463         d = self._filenode.download(wdt)
 464         # exceptions during download are handled by the WebDownloadTarget
 465         d.addErrback(lambda why: None)
 466         return server.NOT_DONE_YET
 467
 468 class BlockingFileError(Exception):
 469     """We cannot auto-create a parent directory, because there is a file in
 470     the way"""
 471 class NoReplacementError(Exception):
 472     """There was already a child by that name, and you asked me to not replace it"""
 473
 474 LOCALHOST = "127.0.0.1"
 475
 476 class NeedLocalhostError:
 477     implements(inevow.IResource)
 478
 479     def renderHTTP(self, ctx):
 480         req = inevow.IRequest(ctx)
 481         req.setResponseCode(http.FORBIDDEN)
 482         req.setHeader("content-type", "text/plain")
 483         return "localfile= or localdir= requires a local connection"
 484
 485 class NeedAbsolutePathError:
 486     implements(inevow.IResource)
 487
 488     def renderHTTP(self, ctx):
 489         req = inevow.IRequest(ctx)
 490         req.setResponseCode(http.FORBIDDEN)
 491         req.setHeader("content-type", "text/plain")
 492         return "localfile= or localdir= requires an absolute path"
 493
 494 class LocalAccessDisabledError:
 495     implements(inevow.IResource)
 496
 497     def renderHTTP(self, ctx):
 498         req = inevow.IRequest(ctx)
 499         req.setResponseCode(http.FORBIDDEN)
 500         req.setHeader("content-type", "text/plain")
 501         return "local file access is disabled"
 502
 503
 504 class LocalFileDownloader(resource.Resource):
 505     def __init__(self, filenode, local_filename):
 506         self._local_filename = local_filename
 507         IFileNode(filenode)
 508         self._filenode = filenode
 509
 510     def render(self, req):
 511         target = download.FileName(self._local_filename)
 512         d = self._filenode.download(target)
 513         def _done(res):
 514             req.write(self._filenode.get_uri())
 515             req.finish()
 516         d.addCallback(_done)
 517         return server.NOT_DONE_YET
 518
 519
 520 class FileJSONMetadata(rend.Page):
 521     def __init__(self, filenode):
 522         self._filenode = filenode
 523
 524     def renderHTTP(self, ctx):
 525         req = inevow.IRequest(ctx)
 526         req.setHeader("content-type", "text/plain")
 527         return self.renderNode(self._filenode)
 528
 529     def renderNode(self, filenode):
 530         file_uri = filenode.get_uri()
 531         data = ("filenode",
 532                 {'ro_uri': file_uri,
 533                  'size': filenode.get_size(),
 534                  })
 535         return simplejson.dumps(data, indent=1)
 536
 537 class FileURI(FileJSONMetadata):
 538     def renderNode(self, filenode):
 539         file_uri = filenode.get_uri()
 540         return file_uri
 541
 542 class FileReadOnlyURI(FileJSONMetadata):
 543     def renderNode(self, filenode):
 544         if filenode.is_readonly():
 545             return filenode.get_uri()
 546         else:
 547             return filenode.get_readonly().get_uri()
 548
 549 class DirnodeWalkerMixin:
 550     """Visit all nodes underneath (and including) the rootnode, one at a
 551     time. For each one, call the visitor. The visitor will see the
 552     IDirectoryNode before it sees any of the IFileNodes inside. If the
 553     visitor returns a Deferred, I do not call the visitor again until it has
 554     fired.
 555     """
 556
 557 ##    def _walk_if_we_could_use_generators(self, rootnode, rootpath=()):
 558 ##        # this is what we'd be doing if we didn't have the Deferreds and
 559 ##        # thus could use generators
 560 ##        yield rootpath, rootnode
 561 ##        for childname, childnode in rootnode.list().items():
 562 ##            childpath = rootpath + (childname,)
 563 ##            if IFileNode.providedBy(childnode):
 564 ##                yield childpath, childnode
 565 ##            elif IDirectoryNode.providedBy(childnode):
 566 ##                for res in self._walk_if_we_could_use_generators(childnode,
 567 ##                                                                 childpath):
 568 ##                    yield res
 569
 570     def walk(self, rootnode, visitor, rootpath=()):
 571         d = rootnode.list()
 572         def _listed(listing):
 573             return listing.items()
 574         d.addCallback(_listed)
 575         d.addCallback(self._handle_items, visitor, rootpath)
 576         return d
 577
 578     def _handle_items(self, items, visitor, rootpath):
 579         if not items:
 580             return
 581         childname, (childnode, metadata) = items[0]
 582         childpath = rootpath + (childname,)
 583         d = defer.maybeDeferred(visitor, childpath, childnode, metadata)
 584         if IDirectoryNode.providedBy(childnode):
 585             d.addCallback(lambda res: self.walk(childnode, visitor, childpath))
 586         d.addCallback(lambda res:
 587                       self._handle_items(items[1:], visitor, rootpath))
 588         return d
 589
 590 class LocalDirectoryDownloader(resource.Resource, DirnodeWalkerMixin):
 591     def __init__(self, dirnode, localdir):
 592         self._dirnode = dirnode
 593         self._localdir = localdir
 594
 595     def _handle(self, path, node, metadata):
 596         localfile = os.path.join(self._localdir, os.sep.join(path))
 597         if IDirectoryNode.providedBy(node):
 598             fileutil.make_dirs(localfile)
 599         elif IFileNode.providedBy(node):
 600             target = download.FileName(localfile)
 601             return node.download(target)
 602
 603     def render(self, req):
 604         d = self.walk(self._dirnode, self._handle)
 605         def _done(res):
 606             req.setHeader("content-type", "text/plain")
 607             return "operation complete"
 608         d.addCallback(_done)
 609         return d
 610
 611 class DirectoryJSONMetadata(rend.Page):
 612     def __init__(self, dirnode):
 613         self._dirnode = dirnode
 614
 615     def renderHTTP(self, ctx):
 616         req = inevow.IRequest(ctx)
 617         req.setHeader("content-type", "text/plain")
 618         return self.renderNode(self._dirnode)
 619
 620     def renderNode(self, node):
 621         d = node.list()
 622         def _got(children):
 623             kids = {}
 624             for name, (childnode, metadata) in children.iteritems():
 625                 if IFileNode.providedBy(childnode):
 626                     kiduri = childnode.get_uri()
 627                     kiddata = ("filenode",
 628                                {'ro_uri': kiduri,
 629                                 'size': childnode.get_size(),
 630                                 })
 631                 else:
 632                     assert IDirectoryNode.providedBy(childnode), (childnode, children,)
 633                     kiddata = ("dirnode",
 634                                {'ro_uri': childnode.get_readonly_uri(),
 635                                 })
 636                     if not childnode.is_readonly():
 637                         kiddata[1]['rw_uri'] = childnode.get_uri()
 638                 kids[name] = kiddata
 639             contents = { 'children': kids,
 640                          'ro_uri': node.get_readonly_uri(),
 641                          }
 642             if not node.is_readonly():
 643                 contents['rw_uri'] = node.get_uri()
 644             data = ("dirnode", contents)
 645             return simplejson.dumps(data, indent=1)
 646         d.addCallback(_got)
 647         return d
 648
 649 class DirectoryURI(DirectoryJSONMetadata):
 650     def renderNode(self, node):
 651         return node.get_uri()
 652
 653 class DirectoryReadonlyURI(DirectoryJSONMetadata):
 654     def renderNode(self, node):
 655         return node.get_readonly_uri()
 656
 657 class RenameForm(rend.Page):
 658     addSlash = True
 659     docFactory = getxmlfile("rename-form.xhtml")
 660
 661     def __init__(self, rootname, dirnode, dirpath):
 662         self._rootname = rootname
 663         self._dirnode = dirnode
 664         self._dirpath = dirpath
 665
 666     def dirpath_as_string(self):
 667         return "/" + "/".join(self._dirpath)
 668
 669     def render_title(self, ctx, data):
 670         return ctx.tag["Directory '%s':" % self.dirpath_as_string()]
 671
 672     def render_header(self, ctx, data):
 673         parent_directories = ("<%s>" % self._rootname,) + self._dirpath
 674         num_dirs = len(parent_directories)
 675
 676         header = [ "Rename in directory '",
 677                    "<%s>/" % self._rootname,
 678                    "/".join(self._dirpath),
 679                    "':", ]
 680
 681         if self._dirnode.is_readonly():
 682             header.append(" (readonly)")
 683         return ctx.tag[header]
 684
 685     def render_when_done(self, ctx, data):
 686         return T.input(type="hidden", name="when_done", value=url.here)
 687
 688     def render_get_name(self, ctx, data):
 689         req = inevow.IRequest(ctx)
 690         name = get_arg(req, "name", "")
 691         ctx.tag.attributes['value'] = name
 692         return ctx.tag
 693
 694 class POSTHandler(rend.Page):
 695     def __init__(self, node, replace):
 696         self._node = node
 697         self._replace = replace
 698
 699     def _check_replacement(self, name):
 700         if self._replace:
 701             return defer.succeed(None)
 702         d = self._node.has_child(name)
 703         def _got(present):
 704             if present:
 705                 raise NoReplacementError("There was already a child by that "
 706                                          "name, and you asked me to not "
 707                                          "replace it.")
 708             return None
 709         d.addCallback(_got)
 710         return d
 711
 712     def renderHTTP(self, ctx):
 713         req = inevow.IRequest(ctx)
 714
 715         t = get_arg(req, "t")
 716         assert t is not None
 717
 718         name = get_arg(req, "name", None)
 719         if name and "/" in name:
 720             req.setResponseCode(http.BAD_REQUEST)
 721             req.setHeader("content-type", "text/plain")
 722             return "name= may not contain a slash"
 723         if name is not None:
 724             name = name.strip()
 725         # we allow the user to delete an empty-named file, but not to create
 726         # them, since that's an easy and confusing mistake to make
 727
 728         when_done = get_arg(req, "when_done", None)
 729         if not boolean_of_arg(get_arg(req, "replace", "true")):
 730             self._replace = False
 731
 732         if t == "mkdir":
 733             if not name:
 734                 raise RuntimeError("mkdir requires a name")
 735             d = self._check_replacement(name)
 736             d.addCallback(lambda res: self._node.create_empty_directory(name))
 737             d.addCallback(lambda res: "directory created")
 738         elif t == "uri":
 739             if not name:
 740                 raise RuntimeError("set-uri requires a name")
 741             newuri = get_arg(req, "uri")
 742             assert newuri is not None
 743             d = self._check_replacement(name)
 744             d.addCallback(lambda res: self._node.set_uri(name, newuri))
 745             d.addCallback(lambda res: newuri)
 746         elif t == "delete":
 747             if name is None:
 748                 # apparently an <input type="hidden" name="name" value="">
 749                 # won't show up in the resulting encoded form.. the 'name'
 750                 # field is completely missing. So to allow deletion of an
 751                 # empty file, we have to pretend that None means ''. The only
 752                 # downide of this is a slightly confusing error message if
 753                 # someone does a POST without a name= field. For our own HTML
 754                 # thisn't a big deal, because we create the 'delete' POST
 755                 # buttons ourselves.
 756                 name = ''
 757             d = self._node.delete(name)
 758             d.addCallback(lambda res: "thing deleted")
 759         elif t == "rename":
 760             from_name = 'from_name' in req.fields and req.fields["from_name"].value
 761             if from_name is not None:
 762                 from_name = from_name.strip()
 763             to_name = 'to_name' in req.fields and req.fields["to_name"].value
 764             if to_name is not None:
 765                 to_name = to_name.strip()
 766             if not from_name or not to_name:
 767                 raise RuntimeError("rename requires from_name and to_name")
 768             if not IDirectoryNode.providedBy(self._node):
 769                 raise RuntimeError("rename must only be called on directories")
 770             for k,v in [ ('from_name', from_name), ('to_name', to_name) ]:
 771                 if v and "/" in v:
 772                     req.setResponseCode(http.BAD_REQUEST)
 773                     req.setHeader("content-type", "text/plain")
 774                     return "%s= may not contain a slash" % (k,)
 775             d = self._check_replacement(to_name)
 776             d.addCallback(lambda res: self._node.get(from_name))
 777             def add_dest(child):
 778                 uri = child.get_uri()
 779                 # now actually do the rename
 780                 return self._node.set_uri(to_name, uri)
 781             d.addCallback(add_dest)
 782             def rm_src(junk):
 783                 return self._node.delete(from_name)
 784             d.addCallback(rm_src)
 785             d.addCallback(lambda res: "thing renamed")
 786
 787         elif t == "upload":
 788             if "mutable" in req.fields:
 789                 contents = req.fields["file"]
 790                 name = name or contents.filename
 791                 if name is not None:
 792                     name = name.strip()
 793                 if not name:
 794                     raise RuntimeError("upload-mutable requires a name")
 795                 # SDMF: files are small, and we can only upload data.
 796                 contents.file.seek(0)
 797                 data = contents.file.read()
 798                 uploadable = FileHandle(contents.file)
 799                 d = self._check_replacement(name)
 800                 d.addCallback(lambda res: self._node.has_child(name))
 801                 def _checked(present):
 802                     if present:
 803                         # modify the existing one instead of creating a new
 804                         # one
 805                         d2 = self._node.get(name)
 806                         def _got_newnode(newnode):
 807                             d3 = newnode.replace(data)
 808                             d3.addCallback(lambda res: newnode.get_uri())
 809                             return d3
 810                         d2.addCallback(_got_newnode)
 811                     else:
 812                         d2 = IClient(ctx).create_mutable_file(data)
 813                         def _uploaded(newnode):
 814                             d1 = self._node.set_node(name, newnode)
 815                             d1.addCallback(lambda res: newnode.get_uri())
 816                             return d1
 817                         d2.addCallback(_uploaded)
 818                     return d2
 819                 d.addCallback(_checked)
 820             else:
 821                 contents = req.fields["file"]
 822                 name = name or contents.filename
 823                 if name is not None:
 824                     name = name.strip()
 825                 if not name:
 826                     raise RuntimeError("upload requires a name")
 827                 uploadable = FileHandle(contents.file)
 828                 d = self._check_replacement(name)
 829                 d.addCallback(lambda res: self._node.add_file(name, uploadable))
 830                 def _done(newnode):
 831                     return newnode.get_uri()
 832                 d.addCallback(_done)
 833
 834         elif t == "overwrite":
 835             contents = req.fields["file"]
 836             # SDMF: files are small, and we can only upload data.
 837             contents.file.seek(0)
 838             data = contents.file.read()
 839             # TODO: 'name' handling needs review
 840             d = defer.succeed(self._node)
 841             def _got_child_overwrite(child_node):
 842                 child_node.replace(data)
 843                 return child_node.get_uri()
 844             d.addCallback(_got_child_overwrite)
 845
 846         elif t == "check":
 847             d = self._node.get(name)
 848             def _got_child_check(child_node):
 849                 d2 = child_node.check()
 850                 def _done(res):
 851                     log.msg("checked %s, results %s" % (child_node, res))
 852                     return str(res)
 853                 d2.addCallback(_done)
 854                 return d2
 855             d.addCallback(_got_child_check)
 856         else:
 857             print "BAD t=%s" % t
 858             return "BAD t=%s" % t
 859         if when_done:
 860             d.addCallback(lambda res: url.URL.fromString(when_done))
 861         def _check_replacement(f):
 862             # TODO: make this more human-friendly: maybe send them to the
 863             # when_done page but with an extra query-arg that will display
 864             # the error message in a big box at the top of the page. The
 865             # directory page that when_done= usually points to accepts a
 866             # result= argument.. use that.
 867             f.trap(NoReplacementError)
 868             req.setResponseCode(http.CONFLICT)
 869             req.setHeader("content-type", "text/plain")
 870             return str(f.value)
 871         d.addErrback(_check_replacement)
 872         return d
 873
 874 class DELETEHandler(rend.Page):
 875     def __init__(self, node, name):
 876         self._node = node
 877         self._name = name
 878
 879     def renderHTTP(self, ctx):
 880         req = inevow.IRequest(ctx)
 881         d = self._node.delete(self._name)
 882         def _done(res):
 883             # what should this return??
 884             return "%s deleted" % self._name
 885         d.addCallback(_done)
 886         def _trap_missing(f):
 887             f.trap(KeyError)
 888             req.setResponseCode(http.NOT_FOUND)
 889             req.setHeader("content-type", "text/plain")
 890             return "no such child %s" % self._name
 891         d.addErrback(_trap_missing)
 892         return d
 893
 894 class PUTHandler(rend.Page):
 895     def __init__(self, node, path, t, localfile, localdir, replace):
 896         self._node = node
 897         self._path = path
 898         self._t = t
 899         self._localfile = localfile
 900         self._localdir = localdir
 901         self._replace = replace
 902
 903     def renderHTTP(self, ctx):
 904         req = inevow.IRequest(ctx)
 905         t = self._t
 906         localfile = self._localfile
 907         localdir = self._localdir
 908
 909         if t == "upload" and not (localfile or localdir):
 910             req.setResponseCode(http.BAD_REQUEST)
 911             req.setHeader("content-type", "text/plain")
 912             return "t=upload requires localfile= or localdir="
 913
 914         # we must traverse the path, creating new directories as necessary
 915         d = self._get_or_create_directories(self._node, self._path[:-1])
 916         name = self._path[-1]
 917         d.addCallback(self._check_replacement, name, self._replace)
 918         if t == "upload":
 919             if localfile:
 920                 d.addCallback(self._upload_localfile, localfile, name)
 921             else:
 922                 # localdir
 923                 # take the last step
 924                 d.addCallback(self._get_or_create_directories, self._path[-1:])
 925                 d.addCallback(self._upload_localdir, localdir)
 926         elif t == "uri":
 927             d.addCallback(self._attach_uri, req.content, name)
 928         elif t == "mkdir":
 929             d.addCallback(self._mkdir, name)
 930         else:
 931             d.addCallback(self._upload_file, req.content, name)
 932         def _check_blocking(f):
 933             f.trap(BlockingFileError)
 934             req.setResponseCode(http.BAD_REQUEST)
 935             req.setHeader("content-type", "text/plain")
 936             return str(f.value)
 937         d.addErrback(_check_blocking)
 938         def _check_replacement(f):
 939             f.trap(NoReplacementError)
 940             req.setResponseCode(http.CONFLICT)
 941             req.setHeader("content-type", "text/plain")
 942             return str(f.value)
 943         d.addErrback(_check_replacement)
 944         return d
 945
 946     def _get_or_create_directories(self, node, path):
 947         if not IDirectoryNode.providedBy(node):
 948             # unfortunately it is too late to provide the name of the
 949             # blocking directory in the error message.
 950             raise BlockingFileError("cannot create directory because there "
 951                                     "is a file in the way")
 952         if not path:
 953             return defer.succeed(node)
 954         d = node.get(path[0])
 955         def _maybe_create(f):
 956             f.trap(KeyError)
 957             return node.create_empty_directory(path[0])
 958         d.addErrback(_maybe_create)
 959         d.addCallback(self._get_or_create_directories, path[1:])
 960         return d
 961
 962     def _check_replacement(self, node, name, replace):
 963         if replace:
 964             return node
 965         d = node.has_child(name)
 966         def _got(present):
 967             if present:
 968                 raise NoReplacementError("There was already a child by that "
 969                                          "name, and you asked me to not "
 970                                          "replace it.")
 971             return node
 972         d.addCallback(_got)
 973         return d
 974
 975     def _mkdir(self, node, name):
 976         d = node.create_empty_directory(name)
 977         def _done(newnode):
 978             return newnode.get_uri()
 979         d.addCallback(_done)
 980         return d
 981
 982     def _upload_file(self, node, contents, name):
 983         uploadable = FileHandle(contents)
 984         d = node.add_file(name, uploadable)
 985         def _done(filenode):
 986             log.msg("webish upload complete")
 987             return filenode.get_uri()
 988         d.addCallback(_done)
 989         return d
 990
 991     def _upload_localfile(self, node, localfile, name):
 992         uploadable = FileName(localfile)
 993         d = node.add_file(name, uploadable)
 994         d.addCallback(lambda filenode: filenode.get_uri())
 995         return d
 996
 997     def _attach_uri(self, parentnode, contents, name):
 998         newuri = contents.read().strip()
 999         d = parentnode.set_uri(name, newuri)
1000         def _done(res):
1001             return newuri
1002         d.addCallback(_done)
1003         return d
1004
1005     def _upload_localdir(self, node, localdir):
1006         # build up a list of files to upload
1007         all_files = []
1008         all_dirs = []
1009         msg = "No files to upload! %s is empty" % localdir
1010         if not os.path.exists(localdir):
1011             msg = "%s doesn't exist!" % localdir
1012         for root, dirs, files in os.walk(localdir):
1013             if root == localdir:
1014                 path = ()
1015             else:
1016                 relative_root = root[len(localdir)+1:]
1017                 path = tuple(relative_root.split(os.sep))
1018             for d in dirs:
1019                 all_dirs.append(path + (d,))
1020             for f in files:
1021                 all_files.append(path + (f,))
1022         d = defer.succeed(msg)
1023         for dir in all_dirs:
1024             if dir:
1025                 d.addCallback(self._makedir, node, dir)
1026         for f in all_files:
1027             d.addCallback(self._upload_one_file, node, localdir, f)
1028         return d
1029
1030     def _makedir(self, res, node, dir):
1031         d = defer.succeed(None)
1032         # get the parent. As long as os.walk gives us parents before
1033         # children, this ought to work
1034         d.addCallback(lambda res: node.get_child_at_path(dir[:-1]))
1035         # then create the child directory
1036         d.addCallback(lambda parent: parent.create_empty_directory(dir[-1]))
1037         return d
1038
1039     def _upload_one_file(self, res, node, localdir, f):
1040         # get the parent. We can be sure this exists because we already
1041         # went through and created all the directories we require.
1042         localfile = os.path.join(localdir, *f)
1043         d = node.get_child_at_path(f[:-1])
1044         d.addCallback(self._upload_localfile, localfile, f[-1])
1045         return d
1046
1047
1048 class Manifest(rend.Page):
1049     docFactory = getxmlfile("manifest.xhtml")
1050     def __init__(self, dirnode, dirpath):
1051         self._dirnode = dirnode
1052         self._dirpath = dirpath
1053
1054     def dirpath_as_string(self):
1055         return "/" + "/".join(self._dirpath)
1056
1057     def render_title(self, ctx):
1058         return T.title["Manifest of %s" % self.dirpath_as_string()]
1059
1060     def render_header(self, ctx):
1061         return T.p["Manifest of %s" % self.dirpath_as_string()]
1062
1063     def data_items(self, ctx, data):
1064         return self._dirnode.build_manifest()
1065
1066     def render_row(self, ctx, refresh_cap):
1067         ctx.fillSlots("refresh_capability", refresh_cap)
1068         return ctx.tag
1069
1070 class ChildError:
1071     implements(inevow.IResource)
1072     def renderHTTP(self, ctx):
1073         req = inevow.IRequest(ctx)
1074         req.setResponseCode(http.BAD_REQUEST)
1075         req.setHeader("content-type", "text/plain")
1076         return self.text
1077
1078 def child_error(text):
1079     ce = ChildError()
1080     ce.text = text
1081     return ce, ()
1082
1083 class VDrive(rend.Page):
1084
1085     def __init__(self, node, name):
1086         self.node = node
1087         self.name = name
1088
1089     def get_child_at_path(self, path):
1090         if path:
1091             return self.node.get_child_at_path(path)
1092         return defer.succeed(self.node)
1093
1094     def locateChild(self, ctx, segments):
1095         req = inevow.IRequest(ctx)
1096         method = req.method
1097         path = segments
1098
1099         t = get_arg(req, "t", "")
1100         localfile = get_arg(req, "localfile", None)
1101         if localfile is not None:
1102             if localfile != os.path.abspath(localfile):
1103                 return NeedAbsolutePathError(), ()
1104         localdir = get_arg(req, "localdir", None)
1105         if localdir is not None:
1106             if localdir != os.path.abspath(localdir):
1107                 return NeedAbsolutePathError(), ()
1108         if localfile or localdir:
1109             if not ILocalAccess(ctx).local_access_is_allowed():
1110                 return LocalAccessDisabledError(), ()
1111             if req.getHost().host != LOCALHOST:
1112                 return NeedLocalhostError(), ()
1113         # TODO: think about clobbering/revealing config files and node secrets
1114
1115         replace = boolean_of_arg(get_arg(req, "replace", "true"))
1116
1117         if method == "GET":
1118             # the node must exist, and our operation will be performed on the
1119             # node itself.
1120             d = self.get_child_at_path(path)
1121             def file_or_dir(node):
1122                 if (IFileNode.providedBy(node)
1123                     or IMutableFileNode.providedBy(node)):
1124                     filename = "unknown"
1125                     if path:
1126                         filename = path[-1]
1127                     filename = get_arg(req, "filename", filename)
1128                     if t == "download":
1129                         if localfile:
1130                             # write contents to a local file
1131                             return LocalFileDownloader(node, localfile), ()
1132                         # send contents as the result
1133                         return FileDownloader(node, filename), ()
1134                     elif t == "":
1135                         # send contents as the result
1136                         return FileDownloader(node, filename), ()
1137                     elif t == "json":
1138                         return FileJSONMetadata(node), ()
1139                     elif t == "uri":
1140                         return FileURI(node), ()
1141                     elif t == "readonly-uri":
1142                         return FileReadOnlyURI(node), ()
1143                     else:
1144                         return child_error("bad t=%s" % t)
1145                 elif IDirectoryNode.providedBy(node):
1146                     if t == "download":
1147                         if localdir:
1148                             # recursive download to a local directory
1149                             return LocalDirectoryDownloader(node, localdir), ()
1150                         return child_error("t=download requires localdir=")
1151                     elif t == "":
1152                         # send an HTML representation of the directory
1153                         return Directory(self.name, node, path), ()
1154                     elif t == "json":
1155                         return DirectoryJSONMetadata(node), ()
1156                     elif t == "uri":
1157                         return DirectoryURI(node), ()
1158                     elif t == "readonly-uri":
1159                         return DirectoryReadonlyURI(node), ()
1160                     elif t == "manifest":
1161                         return Manifest(node, path), ()
1162                     elif t == 'rename-form':
1163                         return RenameForm(self.name, node, path), ()
1164                     else:
1165                         return child_error("bad t=%s" % t)
1166                 else:
1167                     return child_error("unknown node type")
1168             d.addCallback(file_or_dir)
1169         elif method == "POST":
1170             # the node must exist, and our operation will be performed on the
1171             # node itself.
1172             d = self.get_child_at_path(path)
1173             def _got_POST(node):
1174                 return POSTHandler(node, replace), ()
1175             d.addCallback(_got_POST)
1176         elif method == "DELETE":
1177             # the node must exist, and our operation will be performed on its
1178             # parent node.
1179             assert path # you can't delete the root
1180             d = self.get_child_at_path(path[:-1])
1181             def _got_DELETE(node):
1182                 return DELETEHandler(node, path[-1]), ()
1183             d.addCallback(_got_DELETE)
1184         elif method in ("PUT",):
1185             # the node may or may not exist, and our operation may involve
1186             # all the ancestors of the node.
1187             return PUTHandler(self.node, path, t, localfile, localdir, replace), ()
1188         else:
1189             return rend.NotFound
1190         return d
1191
1192 class URIPUTHandler(rend.Page):
1193     def renderHTTP(self, ctx):
1194         req = inevow.IRequest(ctx)
1195         assert req.method == "PUT"
1196
1197         t = get_arg(req, "t", "")
1198
1199         if t == "":
1200             # "PUT /uri", to create an unlinked file. This is like PUT but
1201             # without the associated set_uri.
1202             uploadable = FileHandle(req.content)
1203             d = IClient(ctx).upload(uploadable)
1204             # that fires with the URI of the new file
1205             return d
1206
1207         if t == "mkdir":
1208             # "PUT /uri?t=mkdir", to create an unlinked directory.
1209             d = IClient(ctx).create_empty_dirnode()
1210             d.addCallback(lambda dirnode: dirnode.get_uri())
1211             # XXX add redirect_to_result
1212             return d
1213
1214         req.setResponseCode(http.BAD_REQUEST)
1215         req.setHeader("content-type", "text/plain")
1216         return "/uri only accepts PUT and PUT?t=mkdir"
1217
1218 class URIPOSTHandler(rend.Page):
1219     def renderHTTP(self, ctx):
1220         req = inevow.IRequest(ctx)
1221         assert req.method == "POST"
1222
1223         t = get_arg(req, "t", "").strip()
1224
1225         if t in ("", "upload"):
1226             # "POST /uri", to create an unlinked file.
1227             fileobj = req.fields["file"].file
1228             uploadable = FileHandle(fileobj)
1229             d = IClient(ctx).upload(uploadable)
1230             # that fires with the URI of the new file
1231             return d
1232
1233         if t == "mkdir":
1234             # "POST /uri?t=mkdir", to create an unlinked directory.
1235             d = IClient(ctx).create_empty_dirnode()
1236             redirect = get_arg(req, "redirect_to_result", "false")
1237             if boolean_of_arg(redirect):
1238                 def _then_redir(res):
1239                     new_url = "uri/" + urllib.quote(res.get_uri())
1240                     req.setResponseCode(http.SEE_OTHER) # 303
1241                     req.setHeader('location', new_url)
1242                     req.finish()
1243                     return ''
1244                 d.addCallback(_then_redir)
1245             else:
1246                 d.addCallback(lambda dirnode: dirnode.get_uri())
1247             return d
1248
1249         req.setResponseCode(http.BAD_REQUEST)
1250         req.setHeader("content-type", "text/plain")
1251         err = "/uri accepts only PUT, PUT?t=mkdir, POST?t=upload, and POST?t=mkdir"
1252         return err
1253
1254
1255 class Root(rend.Page):
1256
1257     addSlash = True
1258     docFactory = getxmlfile("welcome.xhtml")
1259
1260     def locateChild(self, ctx, segments):
1261         client = IClient(ctx)
1262         req = inevow.IRequest(ctx)
1263
1264         segments = list(segments) # XXX HELP I AM YUCKY!
1265         while segments and not segments[-1]:
1266             segments.pop()
1267         if not segments:
1268             segments.append('')
1269         segments = tuple(segments)
1270         if segments:
1271             if segments[0] == "uri":
1272                 if len(segments) == 1 or segments[1] == '':
1273                     uri = get_arg(req, "uri", None)
1274                     if uri is not None:
1275                         there = url.URL.fromContext(ctx)
1276                         there = there.clear("uri")
1277                         there = there.child("uri").child(uri)
1278                         return there, ()
1279                 if len(segments) == 1:
1280                     # /uri
1281                     if req.method == "PUT":
1282                         # either "PUT /uri" to create an unlinked file, or
1283                         # "PUT /uri?t=mkdir" to create an unlinked directory
1284                         return URIPUTHandler(), ()
1285                     elif req.method == "POST":
1286                         # "POST /uri?t=upload&file=newfile" to upload an unlinked
1287                         # file or "POST /uri?t=mkdir" to create a new directory
1288                         return URIPOSTHandler(), ()
1289                 if len(segments) < 2:
1290                     return rend.NotFound
1291                 uri = segments[1]
1292                 d = defer.maybeDeferred(client.create_node_from_uri, uri)
1293                 d.addCallback(lambda node: VDrive(node, "from-uri"))
1294                 d.addCallback(lambda vd: vd.locateChild(ctx, segments[2:]))
1295                 def _trap_KeyError(f):
1296                     f.trap(KeyError)
1297                     return rend.FourOhFour(), ()
1298                 d.addErrback(_trap_KeyError)
1299                 return d
1300             elif segments[0] == "xmlrpc":
1301                 raise NotImplementedError()
1302         return rend.Page.locateChild(self, ctx, segments)
1303
1304     child_webform_css = webform.defaultCSS
1305     child_tahoe_css = nevow_File(util.sibpath(__file__, "web/tahoe.css"))
1306
1307     child_provisioning = provisioning.ProvisioningTool()
1308
1309     def data_version(self, ctx, data):
1310         return get_package_versions_string()
1311
1312     def data_my_nodeid(self, ctx, data):
1313         return b32encode(IClient(ctx).nodeid).lower()
1314     def data_introducer_furl(self, ctx, data):
1315         return IClient(ctx).introducer_furl
1316     def data_connected_to_introducer(self, ctx, data):
1317         if IClient(ctx).connected_to_introducer():
1318             return "yes"
1319         return "no"
1320     def data_num_peers(self, ctx, data):
1321         #client = inevow.ISite(ctx)._client
1322         client = IClient(ctx)
1323         return len(list(client.get_all_peerids()))
1324
1325     def data_peers(self, ctx, data):
1326         d = []
1327         client = IClient(ctx)
1328         for nodeid in sorted(client.get_all_peerids()):
1329             row = (b32encode(nodeid).lower(),)
1330             d.append(row)
1331         return d
1332
1333     def render_row(self, ctx, data):
1334         (nodeid_a,) = data
1335         ctx.fillSlots("peerid", nodeid_a)
1336         return ctx.tag
1337
1338     # this is a form where users can download files by URI
1339     def render_download_form(self, ctx, data):
1340         form = T.form(action="uri", method="get",
1341                       enctype="multipart/form-data")[
1342             T.fieldset[
1343             T.legend(class_="freeform-form-label")["download a file"],
1344             "URI of file to download: ",
1345             T.input(type="text", name="uri"), " ",
1346             "Filename to download as: ",
1347             T.input(type="text", name="filename"), " ",
1348             T.input(type="submit", value="download"),
1349             ]]
1350         return T.div[form]
1351
1352     # this is a form where users can create new directories
1353     def render_mkdir_form(self, ctx, data):
1354         form = T.form(action="uri", method="post",
1355                       enctype="multipart/form-data")[
1356             T.fieldset[
1357             T.legend(class_="freeform-form-label")["create a directory"],
1358             T.input(type="hidden", name="t", value="mkdir"),
1359             T.input(type="hidden", name="redirect_to_result", value="true"),
1360             T.input(type="submit", value="create"),
1361             ]]
1362         return T.div[form]
1363
1364
1365 class LocalAccess:
1366     implements(ILocalAccess)
1367     def __init__(self):
1368         self.local_access = False
1369     def local_access_is_allowed(self):
1370         return self.local_access
1371
1372 class WebishServer(service.MultiService):
1373     name = "webish"
1374
1375     def __init__(self, webport, nodeurl_path=None):
1376         service.MultiService.__init__(self)
1377         self.webport = webport
1378         self.root = Root()
1379         self.site = site = appserver.NevowSite(self.root)
1380         self.site.requestFactory = MyRequest
1381         self.allow_local = LocalAccess()
1382         self.site.remember(self.allow_local, ILocalAccess)
1383         s = strports.service(webport, site)
1384         s.setServiceParent(self)
1385         self.listener = s # stash it so the tests can query for the portnum
1386         self._started = defer.Deferred()
1387         if nodeurl_path:
1388             self._started.addCallback(self._write_nodeurl_file, nodeurl_path)
1389
1390     def allow_local_access(self, enable=True):
1391         self.allow_local.local_access = enable
1392
1393     def startService(self):
1394         service.MultiService.startService(self)
1395         # to make various services available to render_* methods, we stash a
1396         # reference to the client on the NevowSite. This will be available by
1397         # adapting the 'context' argument to a special marker interface named
1398         # IClient.
1399         self.site.remember(self.parent, IClient)
1400         # I thought you could do the same with an existing interface, but
1401         # apparently 'ISite' does not exist
1402         #self.site._client = self.parent
1403         self._started.callback(None)
1404
1405     def _write_nodeurl_file(self, junk, nodeurl_path):
1406         # what is our webport?
1407         s = self.listener
1408         if isinstance(s, internet.TCPServer):
1409             base_url = "http://localhost:%d" % s._port.getHost().port
1410         elif isinstance(s, internet.SSLServer):
1411             base_url = "https://localhost:%d" % s._port.getHost().port
1412         else:
1413             base_url = None
1414         if base_url:
1415             f = open(nodeurl_path, 'wb')
1416             # this file is world-readable
1417             f.write(base_url + "\n")
1418             f.close()
1419