src/allmydata/web/directory.py

   1
   2 import simplejson
   3 import urllib
   4 import time
   5
   6 from twisted.internet import defer
   7 from twisted.python.failure import Failure
   8 from twisted.web import http, html
   9 from nevow import url, rend, tags as T
  10 from nevow.inevow import IRequest
  11
  12 from foolscap.eventual import fireEventually
  13
  14 from allmydata.util import base32
  15 from allmydata.uri import from_string_verifier, from_string_dirnode, \
  16      CHKFileVerifierURI
  17 from allmydata.interfaces import IDirectoryNode, IFileNode, IMutableFileNode, \
  18      ExistingChildError
  19 from allmydata.web.common import text_plain, WebError, IClient, \
  20      boolean_of_arg, get_arg, should_create_intermediate_directories, \
  21      getxmlfile, RenderMixin
  22 from allmydata.web.filenode import ReplaceMeMixin, \
  23      FileNodeHandler, PlaceHolderNodeHandler
  24 from allmydata.web.checker_results import CheckerResults, DeepCheckResults, \
  25      DeepCheckAndRepairResults
  26
  27 class BlockingFileError(Exception):
  28     # TODO: catch and transform
  29     """We cannot auto-create a parent directory, because there is a file in
  30     the way"""
  31
  32 def make_handler_for(node, parentnode=None, name=None):
  33     if parentnode:
  34         assert IDirectoryNode.providedBy(parentnode)
  35     if IFileNode.providedBy(node):
  36         return FileNodeHandler(node, parentnode, name)
  37     if IMutableFileNode.providedBy(node):
  38         return FileNodeHandler(node, parentnode, name)
  39     if IDirectoryNode.providedBy(node):
  40         return DirectoryNodeHandler(node, parentnode, name)
  41     raise WebError("Cannot provide handler for '%s'" % node)
  42
  43 class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
  44     addSlash = True
  45
  46     def __init__(self, node, parentnode=None, name=None):
  47         rend.Page.__init__(self)
  48         assert node
  49         self.node = node
  50         self.parentnode = parentnode
  51         self.name = name
  52
  53     def childFactory(self, ctx, name):
  54         req = IRequest(ctx)
  55         name = name.decode("utf-8")
  56         d = self.node.get(name)
  57         d.addBoth(self.got_child, ctx, name)
  58         # got_child returns a handler resource: FileNodeHandler or
  59         # DirectoryNodeHandler
  60         return d
  61
  62     def got_child(self, node_or_failure, ctx, name):
  63         DEBUG = False
  64         if DEBUG: print "GOT_CHILD", name, node_or_failure
  65         req = IRequest(ctx)
  66         method = req.method
  67         nonterminal = len(req.postpath) > 1
  68         t = get_arg(req, "t", "").strip()
  69         if isinstance(node_or_failure, Failure):
  70             f = node_or_failure
  71             f.trap(KeyError)
  72             # No child by this name. What should we do about it?
  73             if DEBUG: print "no child", name
  74             if DEBUG: print "postpath", req.postpath
  75             if nonterminal:
  76                 if DEBUG: print " intermediate"
  77                 if should_create_intermediate_directories(req):
  78                     # create intermediate directories
  79                     if DEBUG: print " making intermediate directory"
  80                     d = self.node.create_empty_directory(name)
  81                     d.addCallback(make_handler_for, self.node, name)
  82                     return d
  83             else:
  84                 if DEBUG: print " terminal"
  85                 # terminal node
  86                 if (method,t) in [ ("POST","mkdir"), ("PUT","mkdir") ]:
  87                     if DEBUG: print " making final directory"
  88                     # final directory
  89                     d = self.node.create_empty_directory(name)
  90                     d.addCallback(make_handler_for, self.node, name)
  91                     return d
  92                 if (method,t) in ( ("PUT",""), ("PUT","uri"), ):
  93                     if DEBUG: print " PUT, making leaf placeholder"
  94                     # we were trying to find the leaf filenode (to put a new
  95                     # file in its place), and it didn't exist. That's ok,
  96                     # since that's the leaf node that we're about to create.
  97                     # We make a dummy one, which will respond to the PUT
  98                     # request by replacing itself.
  99                     return PlaceHolderNodeHandler(self.node, name)
 100             if DEBUG: print " 404"
 101             # otherwise, we just return a no-such-child error
 102             return rend.FourOhFour()
 103
 104         node = node_or_failure
 105         if nonterminal and should_create_intermediate_directories(req):
 106             if not IDirectoryNode.providedBy(node):
 107                 # we would have put a new directory here, but there was a
 108                 # file in the way.
 109                 if DEBUG: print "blocking"
 110                 raise WebError("Unable to create directory '%s': "
 111                                "a file was in the way" % name,
 112                                http.CONFLICT)
 113         if DEBUG: print "good child"
 114         return make_handler_for(node, self.node, name)
 115
 116     def render_DELETE(self, ctx):
 117         assert self.parentnode and self.name
 118         d = self.parentnode.delete(self.name)
 119         d.addCallback(lambda res: self.node.get_uri())
 120         return d
 121
 122     def render_GET(self, ctx):
 123         client = IClient(ctx)
 124         req = IRequest(ctx)
 125         # This is where all of the directory-related ?t=* code goes.
 126         t = get_arg(req, "t", "").strip()
 127         if not t:
 128             # render the directory as HTML, using the docFactory and Nevow's
 129             # whole templating thing.
 130             return DirectoryAsHTML(self.node)
 131
 132         if t == "json":
 133             return DirectoryJSONMetadata(ctx, self.node)
 134         if t == "uri":
 135             return DirectoryURI(ctx, self.node)
 136         if t == "readonly-uri":
 137             return DirectoryReadonlyURI(ctx, self.node)
 138         if t == "manifest":
 139             return Manifest(self.node)
 140         if t == "deep-size":
 141             return DeepSize(ctx, self.node)
 142         if t == "deep-stats":
 143             return DeepStats(ctx, self.node)
 144         if t == 'rename-form':
 145             return RenameForm(self.node)
 146
 147         raise WebError("GET directory: bad t=%s" % t)
 148
 149     def render_PUT(self, ctx):
 150         req = IRequest(ctx)
 151         t = get_arg(req, "t", "").strip()
 152         replace = boolean_of_arg(get_arg(req, "replace", "true"))
 153         if t == "mkdir":
 154             # our job was done by the traversal/create-intermediate-directory
 155             # process that got us here.
 156             return text_plain(self.node.get_uri(), ctx) # TODO: urlencode
 157         if t == "uri":
 158             if not replace:
 159                 # they're trying to set_uri and that name is already occupied
 160                 # (by us).
 161                 raise ExistingChildError()
 162             d = self.parentnode.replace_me_with_a_childcap(ctx, replace)
 163             # TODO: results
 164             return d
 165
 166         raise WebError("PUT to a directory")
 167
 168     def render_POST(self, ctx):
 169         req = IRequest(ctx)
 170         t = get_arg(req, "t", "").strip()
 171         if t == "mkdir":
 172             d = self._POST_mkdir(req)
 173         elif t == "mkdir-p":
 174             # TODO: docs, tests
 175             d = self._POST_mkdir_p(req)
 176         elif t == "upload":
 177             d = self._POST_upload(ctx) # this one needs the context
 178         elif t == "uri":
 179             d = self._POST_uri(req)
 180         elif t == "delete":
 181             d = self._POST_delete(req)
 182         elif t == "rename":
 183             d = self._POST_rename(req)
 184         elif t == "check":
 185             d = self._POST_check(req)
 186         elif t == "deep-check":
 187             d = self._POST_deep_check(req)
 188         elif t == "set_children":
 189             # TODO: docs
 190             d = self._POST_set_children(req)
 191         else:
 192             raise WebError("POST to a directory with bad t=%s" % t)
 193
 194         when_done = get_arg(req, "when_done", None)
 195         if when_done:
 196             d.addCallback(lambda res: url.URL.fromString(when_done))
 197         return d
 198
 199     def _POST_mkdir(self, req):
 200         name = get_arg(req, "name", "")
 201         if not name:
 202             # our job is done, it was handled by the code in got_child
 203             # which created the final directory (i.e. us)
 204             return defer.succeed(self.node.get_uri()) # TODO: urlencode
 205         name = name.decode("utf-8")
 206         replace = boolean_of_arg(get_arg(req, "replace", "true"))
 207         d = self.node.create_empty_directory(name, overwrite=replace)
 208         d.addCallback(lambda child: child.get_uri()) # TODO: urlencode
 209         return d
 210
 211     def _POST_mkdir_p(self, req):
 212         path = get_arg(req, "path")
 213         if not path:
 214             raise WebError("mkdir-p requires a path")
 215         path_ = tuple([seg.decode("utf-8") for seg in path.split('/') if seg ])
 216         # TODO: replace
 217         d = self._get_or_create_directories(self.node, path_)
 218         d.addCallback(lambda node: node.get_uri())
 219         return d
 220
 221     def _get_or_create_directories(self, node, path):
 222         if not IDirectoryNode.providedBy(node):
 223             # unfortunately it is too late to provide the name of the
 224             # blocking directory in the error message.
 225             raise BlockingFileError("cannot create directory because there "
 226                                     "is a file in the way")
 227         if not path:
 228             return defer.succeed(node)
 229         d = node.get(path[0])
 230         def _maybe_create(f):
 231             f.trap(KeyError)
 232             return node.create_empty_directory(path[0])
 233         d.addErrback(_maybe_create)
 234         d.addCallback(self._get_or_create_directories, path[1:])
 235         return d
 236
 237     def _POST_upload(self, ctx):
 238         req = IRequest(ctx)
 239         charset = get_arg(req, "_charset", "utf-8")
 240         contents = req.fields["file"]
 241         assert contents.filename is None or isinstance(contents.filename, str)
 242         name = get_arg(req, "name")
 243         name = name or contents.filename
 244         if name is not None:
 245             name = name.strip()
 246         if not name:
 247             # this prohibts empty, missing, and all-whitespace filenames
 248             raise WebError("upload requires a name")
 249         assert isinstance(name, str)
 250         name = name.decode(charset)
 251         if "/" in name:
 252             raise WebError("name= may not contain a slash", http.BAD_REQUEST)
 253         assert isinstance(name, unicode)
 254
 255         # since POST /uri/path/file?t=upload is equivalent to
 256         # POST /uri/path/dir?t=upload&name=foo, just do the same thing that
 257         # childFactory would do. Things are cleaner if we only do a subset of
 258         # them, though, so we don't do: d = self.childFactory(ctx, name)
 259
 260         d = self.node.get(name)
 261         def _maybe_got_node(node_or_failure):
 262             if isinstance(node_or_failure, Failure):
 263                 f = node_or_failure
 264                 f.trap(KeyError)
 265                 # create a placeholder which will see POST t=upload
 266                 return PlaceHolderNodeHandler(self.node, name)
 267             else:
 268                 node = node_or_failure
 269                 return make_handler_for(node, self.node, name)
 270         d.addBoth(_maybe_got_node)
 271         # now we have a placeholder or a filenodehandler, and we can just
 272         # delegate to it. We could return the resource back out of
 273         # DirectoryNodeHandler.renderHTTP, and nevow would recurse into it,
 274         # but the addCallback() that handles when_done= would break.
 275         d.addCallback(lambda child: child.renderHTTP(ctx))
 276         return d
 277
 278     def _POST_uri(self, req):
 279         childcap = get_arg(req, "uri")
 280         if not childcap:
 281             raise WebError("set-uri requires a uri")
 282         name = get_arg(req, "name")
 283         if not name:
 284             raise WebError("set-uri requires a name")
 285         charset = get_arg(req, "_charset", "utf-8")
 286         name = name.decode(charset)
 287         replace = boolean_of_arg(get_arg(req, "replace", "true"))
 288         d = self.node.set_uri(name, childcap, overwrite=replace)
 289         d.addCallback(lambda res: childcap)
 290         return d
 291
 292     def _POST_delete(self, req):
 293         name = get_arg(req, "name")
 294         if name is None:
 295             # apparently an <input type="hidden" name="name" value="">
 296             # won't show up in the resulting encoded form.. the 'name'
 297             # field is completely missing. So to allow deletion of an
 298             # empty file, we have to pretend that None means ''. The only
 299             # downide of this is a slightly confusing error message if
 300             # someone does a POST without a name= field. For our own HTML
 301             # thisn't a big deal, because we create the 'delete' POST
 302             # buttons ourselves.
 303             name = ''
 304         charset = get_arg(req, "_charset", "utf-8")
 305         name = name.decode(charset)
 306         d = self.node.delete(name)
 307         d.addCallback(lambda res: "thing deleted")
 308         return d
 309
 310     def _POST_rename(self, req):
 311         charset = get_arg(req, "_charset", "utf-8")
 312         from_name = get_arg(req, "from_name")
 313         if from_name is not None:
 314             from_name = from_name.strip()
 315             from_name = from_name.decode(charset)
 316             assert isinstance(from_name, unicode)
 317         to_name = get_arg(req, "to_name")
 318         if to_name is not None:
 319             to_name = to_name.strip()
 320             to_name = to_name.decode(charset)
 321             assert isinstance(to_name, unicode)
 322         if not from_name or not to_name:
 323             raise WebError("rename requires from_name and to_name")
 324         for k,v in [ ('from_name', from_name), ('to_name', to_name) ]:
 325             if v and "/" in v:
 326                 raise WebError("%s= may not contain a slash" % k,
 327                                http.BAD_REQUEST)
 328
 329         replace = boolean_of_arg(get_arg(req, "replace", "true"))
 330         d = self.node.move_child_to(from_name, self.node, to_name, replace)
 331         d.addCallback(lambda res: "thing renamed")
 332         return d
 333
 334     def _POST_check(self, req):
 335         # check this directory
 336         d = self.node.check()
 337         d.addCallback(lambda res: CheckerResults(res))
 338         return d
 339
 340     def _POST_deep_check(self, req):
 341         # check this directory and everything reachable from it
 342         verify = boolean_of_arg(get_arg(req, "verify", "false"))
 343         repair = boolean_of_arg(get_arg(req, "repair", "false"))
 344         if repair:
 345             d = self.node.deep_check_and_repair(verify)
 346             d.addCallback(lambda res: DeepCheckAndRepairResults(res))
 347         else:
 348             d = self.node.deep_check(verify)
 349             d.addCallback(lambda res: DeepCheckResults(res))
 350         return d
 351
 352     def _POST_set_children(self, req):
 353         replace = boolean_of_arg(get_arg(req, "replace", "true"))
 354         req.content.seek(0)
 355         body = req.content.read()
 356         try:
 357             children = simplejson.loads(body)
 358         except ValueError, le:
 359             le.args = tuple(le.args + (body,))
 360             # TODO test handling of bad JSON
 361             raise
 362         cs = []
 363         for name, (file_or_dir, mddict) in children.iteritems():
 364             cap = str(mddict.get('rw_uri') or mddict.get('ro_uri'))
 365             cs.append((name, cap, mddict.get('metadata')))
 366         d = self.node.set_children(cs, replace)
 367         d.addCallback(lambda res: "Okay so I did it.")
 368         # TODO: results
 369         return d
 370
 371 def abbreviated_dirnode(dirnode):
 372     u = from_string_dirnode(dirnode.get_uri())
 373     si = u.get_filenode_uri().storage_index
 374     si_s = base32.b2a(si)
 375     return si_s[:6]
 376
 377 class DirectoryAsHTML(rend.Page):
 378     # The remainder of this class is to render the directory into
 379     # human+browser -oriented HTML.
 380     docFactory = getxmlfile("directory.xhtml")
 381     addSlash = True
 382
 383     def __init__(self, node):
 384         rend.Page.__init__(self)
 385         self.node = node
 386
 387     def render_title(self, ctx, data):
 388         si_s = abbreviated_dirnode(self.node)
 389         header = ["Directory SI=%s" % si_s]
 390         return ctx.tag[header]
 391
 392     def render_header(self, ctx, data):
 393         si_s = abbreviated_dirnode(self.node)
 394         header = ["Directory SI=%s" % si_s]
 395         if self.node.is_readonly():
 396             header.append(" (readonly)")
 397         return ctx.tag[header]
 398
 399     def get_root(self, ctx):
 400         req = IRequest(ctx)
 401         # the addSlash=True gives us one extra (empty) segment
 402         depth = len(req.prepath) + len(req.postpath) - 1
 403         link = "/".join([".."] * depth)
 404         return link
 405
 406     def render_welcome(self, ctx, data):
 407         link = self.get_root(ctx)
 408         return T.div[T.a(href=link)["Return to Welcome page"]]
 409
 410     def data_children(self, ctx, data):
 411         d = self.node.list()
 412         d.addCallback(lambda dict: sorted(dict.items()))
 413         def _stall_some(items):
 414             # Deferreds don't optimize out tail recursion, and the way
 415             # Nevow's flattener handles Deferreds doesn't take this into
 416             # account. As a result, large lists of Deferreds that fire in the
 417             # same turn (i.e. the output of defer.succeed) will cause a stack
 418             # overflow. To work around this, we insert a turn break after
 419             # every 100 items, using foolscap's fireEventually(). This gives
 420             # the stack a chance to be popped. It would also work to put
 421             # every item in its own turn, but that'd be a lot more
 422             # inefficient. This addresses ticket #237, for which I was never
 423             # able to create a failing unit test.
 424             output = []
 425             for i,item in enumerate(items):
 426                 if i % 100 == 0:
 427                     output.append(fireEventually(item))
 428                 else:
 429                     output.append(item)
 430             return output
 431         d.addCallback(_stall_some)
 432         return d
 433
 434     def render_row(self, ctx, data):
 435         name, (target, metadata) = data
 436         name = name.encode("utf-8")
 437         assert not isinstance(name, unicode)
 438
 439         root = self.get_root(ctx)
 440         here = "%s/uri/%s/" % (root, urllib.quote(self.node.get_uri()))
 441         if self.node.is_readonly():
 442             delete = "-"
 443             rename = "-"
 444         else:
 445             # this creates a button which will cause our child__delete method
 446             # to be invoked, which deletes the file and then redirects the
 447             # browser back to this directory
 448             delete = T.form(action=here, method="post")[
 449                 T.input(type='hidden', name='t', value='delete'),
 450                 T.input(type='hidden', name='name', value=name),
 451                 T.input(type='hidden', name='when_done', value="."),
 452                 T.input(type='submit', value='del', name="del"),
 453                 ]
 454
 455             rename = T.form(action=here, method="get")[
 456                 T.input(type='hidden', name='t', value='rename-form'),
 457                 T.input(type='hidden', name='name', value=name),
 458                 T.input(type='hidden', name='when_done', value="."),
 459                 T.input(type='submit', value='rename', name="rename"),
 460                 ]
 461
 462         ctx.fillSlots("delete", delete)
 463         ctx.fillSlots("rename", rename)
 464         if IDirectoryNode.providedBy(target):
 465             check_url = "%s/uri/%s/" % (root, urllib.quote(target.get_uri()))
 466             check_done_url = "../../uri/%s/" % urllib.quote(self.node.get_uri())
 467         else:
 468             check_url = "%s/uri/%s" % (root, urllib.quote(target.get_uri()))
 469             check_done_url = "../uri/%s/" % urllib.quote(self.node.get_uri())
 470         check = T.form(action=check_url, method="post")[
 471             T.input(type='hidden', name='t', value='check'),
 472             T.input(type='hidden', name='return_to', value=check_done_url),
 473             T.input(type='submit', value='check', name="check"),
 474             ]
 475         ctx.fillSlots("overwrite",
 476                       self.build_overwrite_form(ctx, name, target))
 477         ctx.fillSlots("check", check)
 478
 479         times = []
 480         TIME_FORMAT = "%H:%M:%S %d-%b-%Y"
 481         if "ctime" in metadata:
 482             ctime = time.strftime(TIME_FORMAT,
 483                                   time.localtime(metadata["ctime"]))
 484             times.append("c: " + ctime)
 485         if "mtime" in metadata:
 486             mtime = time.strftime(TIME_FORMAT,
 487                                   time.localtime(metadata["mtime"]))
 488             if times:
 489                 times.append(T.br())
 490                 times.append("m: " + mtime)
 491         ctx.fillSlots("times", times)
 492
 493         assert (IFileNode.providedBy(target)
 494                 or IDirectoryNode.providedBy(target)
 495                 or IMutableFileNode.providedBy(target)), target
 496
 497         quoted_uri = urllib.quote(target.get_uri())
 498
 499         if IMutableFileNode.providedBy(target):
 500             # to prevent javascript in displayed .html files from stealing a
 501             # secret directory URI from the URL, send the browser to a URI-based
 502             # page that doesn't know about the directory at all
 503             dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, urllib.quote(name))
 504
 505             ctx.fillSlots("filename",
 506                           T.a(href=dlurl)[html.escape(name)])
 507             ctx.fillSlots("type", "SSK")
 508
 509             ctx.fillSlots("size", "?")
 510
 511             text_plain_url = "%s/file/%s/@@named=/foo.txt" % (root, quoted_uri)
 512             text_plain_tag = T.a(href=text_plain_url)["text/plain"]
 513
 514         elif IFileNode.providedBy(target):
 515             dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, urllib.quote(name))
 516
 517             ctx.fillSlots("filename",
 518                           T.a(href=dlurl)[html.escape(name)])
 519             ctx.fillSlots("type", "FILE")
 520
 521             ctx.fillSlots("size", target.get_size())
 522
 523             text_plain_url = "%s/file/%s/@@named=/foo.txt" % (root, quoted_uri)
 524             text_plain_tag = T.a(href=text_plain_url)["text/plain"]
 525
 526
 527         elif IDirectoryNode.providedBy(target):
 528             # directory
 529             uri_link = "%s/uri/%s/" % (root, urllib.quote(target.get_uri()))
 530             ctx.fillSlots("filename",
 531                           T.a(href=uri_link)[html.escape(name)])
 532             if target.is_readonly():
 533                 dirtype = "DIR-RO"
 534             else:
 535                 dirtype = "DIR"
 536             ctx.fillSlots("type", dirtype)
 537             ctx.fillSlots("size", "-")
 538             text_plain_tag = None
 539
 540         childdata = [T.a(href="%s?t=json" % name)["JSON"], ", ",
 541                      T.a(href="%s?t=uri" % name)["URI"], ", ",
 542                      T.a(href="%s?t=readonly-uri" % name)["readonly-URI"],
 543                      ]
 544         if text_plain_tag:
 545             childdata.extend([", ", text_plain_tag])
 546
 547         ctx.fillSlots("data", childdata)
 548
 549         results = "--"
 550         # TODO: include a link to see more results, including timestamps
 551         # TODO: use a sparkline
 552         ctx.fillSlots("checker_results", results)
 553
 554         return ctx.tag
 555
 556     def render_forms(self, ctx, data):
 557         forms = []
 558         deep_check = T.form(action=".", method="post",
 559                             enctype="multipart/form-data")[
 560             T.fieldset[
 561             T.input(type="hidden", name="t", value="deep-check"),
 562             T.input(type="hidden", name="return_to", value="."),
 563             T.legend(class_="freeform-form-label")["Run a deep-check operation (EXPENSIVE)"],
 564             T.input(type="submit", value="Deep-Check"),
 565             " ",
 566             "Verify every bit? (EVEN MORE EXPENSIVE):",
 567             T.input(type="checkbox", name="verify"),
 568             ]]
 569         forms.append(T.div(class_="freeform-form")[deep_check])
 570
 571         if self.node.is_readonly():
 572             forms.append(T.div["No upload forms: directory is read-only"])
 573             return forms
 574
 575         mkdir = T.form(action=".", method="post",
 576                        enctype="multipart/form-data")[
 577             T.fieldset[
 578             T.input(type="hidden", name="t", value="mkdir"),
 579             T.input(type="hidden", name="when_done", value="."),
 580             T.legend(class_="freeform-form-label")["Create a new directory"],
 581             "New directory name: ",
 582             T.input(type="text", name="name"), " ",
 583             T.input(type="submit", value="Create"),
 584             ]]
 585         forms.append(T.div(class_="freeform-form")[mkdir])
 586
 587         upload = T.form(action=".", method="post",
 588                         enctype="multipart/form-data")[
 589             T.fieldset[
 590             T.input(type="hidden", name="t", value="upload"),
 591             T.input(type="hidden", name="when_done", value="."),
 592             T.legend(class_="freeform-form-label")["Upload a file to this directory"],
 593             "Choose a file to upload: ",
 594             T.input(type="file", name="file", class_="freeform-input-file"),
 595             " ",
 596             T.input(type="submit", value="Upload"),
 597             " Mutable?:",
 598             T.input(type="checkbox", name="mutable"),
 599             ]]
 600         forms.append(T.div(class_="freeform-form")[upload])
 601
 602         mount = T.form(action=".", method="post",
 603                         enctype="multipart/form-data")[
 604             T.fieldset[
 605             T.input(type="hidden", name="t", value="uri"),
 606             T.input(type="hidden", name="when_done", value="."),
 607             T.legend(class_="freeform-form-label")["Attach a file or directory"
 608                                                    " (by URI) to this"
 609                                                    " directory"],
 610             "New child name: ",
 611             T.input(type="text", name="name"), " ",
 612             "URI of new child: ",
 613             T.input(type="text", name="uri"), " ",
 614             T.input(type="submit", value="Attach"),
 615             ]]
 616         forms.append(T.div(class_="freeform-form")[mount])
 617         return forms
 618
 619     def build_overwrite_form(self, ctx, name, target):
 620         if IMutableFileNode.providedBy(target) and not target.is_readonly():
 621             root = self.get_root(ctx)
 622             action = "%s/uri/%s" % (root, urllib.quote(target.get_uri()))
 623             done_url = "../uri/%s/" % urllib.quote(self.node.get_uri())
 624             overwrite = T.form(action=action, method="post",
 625                                enctype="multipart/form-data")[
 626                 T.fieldset[
 627                 T.input(type="hidden", name="t", value="upload"),
 628                 T.input(type='hidden', name='when_done', value=done_url),
 629                 T.legend(class_="freeform-form-label")["Overwrite"],
 630                 "Choose new file: ",
 631                 T.input(type="file", name="file", class_="freeform-input-file"),
 632                 " ",
 633                 T.input(type="submit", value="Overwrite")
 634                 ]]
 635             return [T.div(class_="freeform-form")[overwrite],]
 636         else:
 637             return []
 638
 639     def render_results(self, ctx, data):
 640         req = IRequest(ctx)
 641         return get_arg(req, "results", "")
 642
 643
 644 def DirectoryJSONMetadata(ctx, dirnode):
 645     d = dirnode.list()
 646     def _got(children):
 647         kids = {}
 648         for name, (childnode, metadata) in children.iteritems():
 649             if childnode.is_readonly():
 650                 rw_uri = None
 651                 ro_uri = childnode.get_uri()
 652             else:
 653                 rw_uri = childnode.get_uri()
 654                 ro_uri = childnode.get_readonly_uri()
 655             if IFileNode.providedBy(childnode):
 656                 kiddata = ("filenode", {'size': childnode.get_size(),
 657                                         'metadata': metadata,
 658                                         })
 659             else:
 660                 assert IDirectoryNode.providedBy(childnode), (childnode,
 661                                                               children,)
 662                 kiddata = ("dirnode", {'metadata': metadata})
 663             if ro_uri:
 664                 kiddata[1]["ro_uri"] = ro_uri
 665             if rw_uri:
 666                 kiddata[1]["rw_uri"] = rw_uri
 667             kiddata[1]['mutable'] = childnode.is_mutable()
 668             kids[name] = kiddata
 669         if dirnode.is_readonly():
 670             drw_uri = None
 671             dro_uri = dirnode.get_uri()
 672         else:
 673             drw_uri = dirnode.get_uri()
 674             dro_uri = dirnode.get_readonly_uri()
 675         contents = { 'children': kids }
 676         if dro_uri:
 677             contents['ro_uri'] = dro_uri
 678         if drw_uri:
 679             contents['rw_uri'] = drw_uri
 680         contents['mutable'] = dirnode.is_mutable()
 681         data = ("dirnode", contents)
 682         return simplejson.dumps(data, indent=1)
 683     d.addCallback(_got)
 684     d.addCallback(text_plain, ctx)
 685     return d
 686
 687 def DirectoryURI(ctx, dirnode):
 688     return text_plain(dirnode.get_uri(), ctx)
 689
 690 def DirectoryReadonlyURI(ctx, dirnode):
 691     return text_plain(dirnode.get_readonly_uri(), ctx)
 692
 693 class RenameForm(rend.Page):
 694     addSlash = True
 695     docFactory = getxmlfile("rename-form.xhtml")
 696
 697     def render_title(self, ctx, data):
 698         return ctx.tag["Directory SI=%s" % abbreviated_dirnode(self.original)]
 699
 700     def render_header(self, ctx, data):
 701         header = ["Rename "
 702                   "in directory SI=%s" % abbreviated_dirnode(self.original),
 703                   ]
 704
 705         if self.original.is_readonly():
 706             header.append(" (readonly!)")
 707         header.append(":")
 708         return ctx.tag[header]
 709
 710     def render_when_done(self, ctx, data):
 711         return T.input(type="hidden", name="when_done", value=".")
 712
 713     def render_get_name(self, ctx, data):
 714         req = IRequest(ctx)
 715         name = get_arg(req, "name", "")
 716         ctx.tag.attributes['value'] = name
 717         return ctx.tag
 718
 719
 720 class Manifest(rend.Page):
 721     docFactory = getxmlfile("manifest.xhtml")
 722
 723     def render_title(self, ctx):
 724         return T.title["Manifest of SI=%s" % abbreviated_dirnode(self.original)]
 725
 726     def render_header(self, ctx):
 727         return T.p["Manifest of SI=%s" % abbreviated_dirnode(self.original)]
 728
 729     def data_items(self, ctx, data):
 730         return self.original.build_manifest()
 731
 732     def render_row(self, ctx, refresh_cap):
 733         ctx.fillSlots("refresh_capability", refresh_cap)
 734         return ctx.tag
 735
 736 def DeepSize(ctx, dirnode):
 737     d = dirnode.build_manifest()
 738     def _measure_size(manifest):
 739         total = 0
 740         for verifiercap in manifest:
 741             u = from_string_verifier(verifiercap)
 742             if isinstance(u, CHKFileVerifierURI):
 743                 total += u.size
 744         return str(total)
 745     d.addCallback(_measure_size)
 746     d.addCallback(text_plain, ctx)
 747     return d
 748
 749 def DeepStats(ctx, dirnode):
 750     d = dirnode.deep_stats()
 751     d.addCallback(simplejson.dumps, indent=1)
 752     d.addCallback(text_plain, ctx)
 753     return d