]> git.rkrishnan.org Git - tahoe-lafs/tahoe-lafs.git/blobdiff - src/allmydata/web/directory.py
wui: use standard time format (#1077)
[tahoe-lafs/tahoe-lafs.git] / src / allmydata / web / directory.py
index d1d9faad49bb1667e38eef77336038906ffe1db5..29b57620ba2048aa8d3ad55f7802b1878cc0492c 100644 (file)
@@ -6,27 +6,32 @@ from zope.interface import implements
 from twisted.internet import defer
 from twisted.internet.interfaces import IPushProducer
 from twisted.python.failure import Failure
-from twisted.web import http, html
+from twisted.web import http
 from nevow import url, rend, inevow, tags as T
 from nevow.inevow import IRequest
 
 from foolscap.api import fireEventually
 
-from allmydata.util import base32, time_format
+from allmydata.util import base32
+from allmydata.util.encodingutil import to_str
 from allmydata.uri import from_string_dirnode
-from allmydata.interfaces import IDirectoryNode, IFileNode, IMutableFileNode, \
-     IFilesystemNode, ExistingChildError, NoSuchChildError
+from allmydata.interfaces import IDirectoryNode, IFileNode, IFilesystemNode, \
+     IImmutableFileNode, IMutableFileNode, ExistingChildError, \
+     NoSuchChildError, EmptyPathnameComponentError, SDMF_VERSION, MDMF_VERSION
+from allmydata.blacklist import ProhibitedNode
 from allmydata.monitor import Monitor, OperationCancelledError
 from allmydata import dirnode
 from allmydata.web.common import text_plain, WebError, \
      IOpHandleTable, NeedOperationHandleError, \
      boolean_of_arg, get_arg, get_root, parse_replace_arg, \
      should_create_intermediate_directories, \
-     getxmlfile, RenderMixin, humanize_failure
+     getxmlfile, RenderMixin, humanize_failure, convert_children_json, \
+     get_format, get_mutable_type, get_filenode_metadata, render_time
 from allmydata.web.filenode import ReplaceMeMixin, \
      FileNodeHandler, PlaceHolderNodeHandler
-from allmydata.web.check_results import CheckResults, \
-     CheckAndRepairResults, DeepCheckResults, DeepCheckAndRepairResults
+from allmydata.web.check_results import CheckResultsRenderer, \
+     CheckAndRepairResultsRenderer, DeepCheckResultsRenderer, \
+     DeepCheckAndRepairResultsRenderer, LiteralCheckResultsRenderer
 from allmydata.web.info import MoreInfo
 from allmydata.web.operations import ReloadMixin
 from allmydata.web.check_results import json_check_results, \
@@ -40,8 +45,6 @@ class BlockingFileError(Exception):
 def make_handler_for(node, client, parentnode=None, name=None):
     if parentnode:
         assert IDirectoryNode.providedBy(parentnode)
-    if IMutableFileNode.providedBy(node):
-        return FileNodeHandler(client, node, parentnode, name)
     if IFileNode.providedBy(node):
         return FileNodeHandler(client, node, parentnode, name)
     if IDirectoryNode.providedBy(node):
@@ -60,8 +63,9 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
         self.name = name
 
     def childFactory(self, ctx, name):
-        req = IRequest(ctx)
         name = name.decode("utf-8")
+        if not name:
+            raise EmptyPathnameComponentError()
         d = self.node.get(name)
         d.addBoth(self.got_child, ctx, name)
         # got_child returns a handler resource: FileNodeHandler or
@@ -86,17 +90,33 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
                 if should_create_intermediate_directories(req):
                     # create intermediate directories
                     if DEBUG: print " making intermediate directory"
-                    d = self.node.create_empty_directory(name)
+                    d = self.node.create_subdirectory(name)
                     d.addCallback(make_handler_for,
                                   self.client, self.node, name)
                     return d
             else:
                 if DEBUG: print " terminal"
                 # terminal node
-                if (method,t) in [ ("POST","mkdir"), ("PUT","mkdir") ]:
+                if (method,t) in [ ("POST","mkdir"), ("PUT","mkdir"),
+                                   ("POST", "mkdir-with-children"),
+                                   ("POST", "mkdir-immutable") ]:
                     if DEBUG: print " making final directory"
                     # final directory
-                    d = self.node.create_empty_directory(name)
+                    kids = {}
+                    if t in ("mkdir-with-children", "mkdir-immutable"):
+                        req.content.seek(0)
+                        kids_json = req.content.read()
+                        kids = convert_children_json(self.client.nodemaker,
+                                                     kids_json)
+                    file_format = get_format(req, None)
+                    mutable = True
+                    mt = get_mutable_type(file_format)
+                    if t == "mkdir-immutable":
+                        mutable = False
+
+                    d = self.node.create_subdirectory(name, kids,
+                                                      mutable=mutable,
+                                                      mutable_version=mt)
                     d.addCallback(make_handler_for,
                                   self.client, self.node, name)
                     return d
@@ -134,10 +154,20 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
         req = IRequest(ctx)
         # This is where all of the directory-related ?t=* code goes.
         t = get_arg(req, "t", "").strip()
+
+        # t=info contains variable ophandles, t=rename-form contains the name
+        # of the child being renamed. Neither is allowed an ETag.
+        FIXED_OUTPUT_TYPES =  ["", "json", "uri", "readonly-uri"]
+        if not self.node.is_mutable() and t in FIXED_OUTPUT_TYPES:
+            si = self.node.get_storage_index()
+            if si and req.setETag('DIR:%s-%s' % (base32.b2a(si), t or "")):
+                return ""
+
         if not t:
             # render the directory as HTML, using the docFactory and Nevow's
             # whole templating thing.
-            return DirectoryAsHTML(self.node)
+            return DirectoryAsHTML(self.node,
+                                   self.client.mutable_file_default)
 
         if t == "json":
             return DirectoryJSONMetadata(ctx, self.node)
@@ -178,17 +208,20 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
 
         if t == "mkdir":
             d = self._POST_mkdir(req)
-        elif t == "mkdir-p":
-            # TODO: docs, tests
-            d = self._POST_mkdir_p(req)
+        elif t == "mkdir-with-children":
+            d = self._POST_mkdir_with_children(req)
+        elif t == "mkdir-immutable":
+            d = self._POST_mkdir_immutable(req)
         elif t == "upload":
             d = self._POST_upload(ctx) # this one needs the context
         elif t == "uri":
             d = self._POST_uri(req)
-        elif t == "delete":
-            d = self._POST_delete(req)
+        elif t == "delete" or t == "unlink":
+            d = self._POST_unlink(req)
         elif t == "rename":
             d = self._POST_rename(req)
+        elif t == "relink":
+            d = self._POST_relink(req)
         elif t == "check":
             d = self._POST_check(req)
         elif t == "start-deep-check":
@@ -203,8 +236,7 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
             d = self._POST_start_deep_stats(ctx)
         elif t == "stream-manifest":
             d = self._POST_stream_manifest(ctx)
-        elif t == "set_children":
-            # TODO: docs
+        elif t == "set_children" or t == "set-children":
             d = self._POST_set_children(req)
         else:
             raise WebError("POST to a directory with bad t=%s" % t)
@@ -222,34 +254,45 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
             return defer.succeed(self.node.get_uri()) # TODO: urlencode
         name = name.decode("utf-8")
         replace = boolean_of_arg(get_arg(req, "replace", "true"))
-        d = self.node.create_empty_directory(name, overwrite=replace)
+        kids = {}
+        mt = get_mutable_type(get_format(req, None))
+        d = self.node.create_subdirectory(name, kids, overwrite=replace,
+                                          mutable_version=mt)
         d.addCallback(lambda child: child.get_uri()) # TODO: urlencode
         return d
 
-    def _POST_mkdir_p(self, req):
-        path = get_arg(req, "path")
-        if not path:
-            raise WebError("mkdir-p requires a path")
-        path_ = tuple([seg.decode("utf-8") for seg in path.split('/') if seg ])
-        # TODO: replace
-        d = self._get_or_create_directories(self.node, path_)
-        d.addCallback(lambda node: node.get_uri())
+    def _POST_mkdir_with_children(self, req):
+        name = get_arg(req, "name", "")
+        if not name:
+            # our job is done, it was handled by the code in got_child
+            # which created the final directory (i.e. us)
+            return defer.succeed(self.node.get_uri()) # TODO: urlencode
+        name = name.decode("utf-8")
+        # TODO: decide on replace= behavior, see #903
+        #replace = boolean_of_arg(get_arg(req, "replace", "false"))
+        req.content.seek(0)
+        kids_json = req.content.read()
+        kids = convert_children_json(self.client.nodemaker, kids_json)
+        mt = get_mutable_type(get_format(req, None))
+        d = self.node.create_subdirectory(name, kids, overwrite=False,
+                                          mutable_version=mt)
+        d.addCallback(lambda child: child.get_uri()) # TODO: urlencode
         return d
 
-    def _get_or_create_directories(self, node, path):
-        if not IDirectoryNode.providedBy(node):
-            # unfortunately it is too late to provide the name of the
-            # blocking directory in the error message.
-            raise BlockingFileError("cannot create directory because there "
-                                    "is a file in the way")
-        if not path:
-            return defer.succeed(node)
-        d = node.get(path[0])
-        def _maybe_create(f):
-            f.trap(NoSuchChildError)
-            return node.create_empty_directory(path[0])
-        d.addErrback(_maybe_create)
-        d.addCallback(self._get_or_create_directories, path[1:])
+    def _POST_mkdir_immutable(self, req):
+        name = get_arg(req, "name", "")
+        if not name:
+            # our job is done, it was handled by the code in got_child
+            # which created the final directory (i.e. us)
+            return defer.succeed(self.node.get_uri()) # TODO: urlencode
+        name = name.decode("utf-8")
+        # TODO: decide on replace= behavior, see #903
+        #replace = boolean_of_arg(get_arg(req, "replace", "false"))
+        req.content.seek(0)
+        kids_json = req.content.read()
+        kids = convert_children_json(self.client.nodemaker, kids_json)
+        d = self.node.create_subdirectory(name, kids, overwrite=False, mutable=False)
+        d.addCallback(lambda child: child.get_uri()) # TODO: urlencode
         return d
 
     def _POST_upload(self, ctx):
@@ -302,57 +345,100 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
             raise WebError("set-uri requires a name")
         charset = get_arg(req, "_charset", "utf-8")
         name = name.decode(charset)
-        replace = boolean_of_arg(get_arg(req, "replace", "true"))
-        d = self.node.set_uri(name, childcap, overwrite=replace)
+        replace = parse_replace_arg(get_arg(req, "replace", "true"))
+
+        # We mustn't pass childcap for the readcap argument because we don't
+        # know whether it is a read cap. Passing a read cap as the writecap
+        # argument will work (it ends up calling NodeMaker.create_from_cap,
+        # which derives a readcap if necessary and possible).
+        d = self.node.set_uri(name, childcap, None, overwrite=replace)
         d.addCallback(lambda res: childcap)
         return d
 
-    def _POST_delete(self, req):
+    def _POST_unlink(self, req):
         name = get_arg(req, "name")
         if name is None:
             # apparently an <input type="hidden" name="name" value="">
             # won't show up in the resulting encoded form.. the 'name'
-            # field is completely missing. So to allow deletion of an
-            # empty file, we have to pretend that None means ''. The only
-            # downide of this is a slightly confusing error message if
-            # someone does a POST without a name= field. For our own HTML
-            # thisn't a big deal, because we create the 'delete' POST
-            # buttons ourselves.
+            # field is completely missing. So to allow unlinking of a
+            # child with a name that is the empty string, we have to
+            # pretend that None means ''. The only downside of this is
+            # a slightly confusing error message if someone does a POST
+            # without a name= field. For our own HTML this isn't a big
+            # deal, because we create the 'unlink' POST buttons ourselves.
             name = ''
         charset = get_arg(req, "_charset", "utf-8")
         name = name.decode(charset)
         d = self.node.delete(name)
-        d.addCallback(lambda res: "thing deleted")
+        d.addCallback(lambda res: "thing unlinked")
         return d
 
     def _POST_rename(self, req):
+        # rename is identical to relink, but to_dir is not allowed
+        # and to_name is required.
+        if get_arg(req, "to_dir") is not None:
+            raise WebError("to_dir= is not valid for rename")
+        if get_arg(req, "to_name") is None:
+            raise WebError("to_name= is required for rename")
+        return self._POST_relink(req)
+
+    def _POST_relink(self, req):
         charset = get_arg(req, "_charset", "utf-8")
+        replace = parse_replace_arg(get_arg(req, "replace", "true"))
+
         from_name = get_arg(req, "from_name")
         if from_name is not None:
             from_name = from_name.strip()
             from_name = from_name.decode(charset)
             assert isinstance(from_name, unicode)
+        else:
+            raise WebError("from_name= is required")
+
         to_name = get_arg(req, "to_name")
         if to_name is not None:
             to_name = to_name.strip()
             to_name = to_name.decode(charset)
             assert isinstance(to_name, unicode)
-        if not from_name or not to_name:
-            raise WebError("rename requires from_name and to_name")
-        if from_name == to_name:
-            return defer.succeed("redundant rename")
-
-        # allow from_name to contain slashes, so they can fix names that were
-        # accidentally created with them. But disallow them in to_name, to
-        # discourage the practice.
+        else:
+            to_name = from_name
+
+        # Disallow slashes in both from_name and to_name, that would only
+        # cause confusion.
+        if "/" in from_name:
+            raise WebError("from_name= may not contain a slash",
+                           http.BAD_REQUEST)
         if "/" in to_name:
-            raise WebError("to_name= may not contain a slash", http.BAD_REQUEST)
+            raise WebError("to_name= may not contain a slash",
+                           http.BAD_REQUEST)
+
+        to_dir = get_arg(req, "to_dir")
+        if to_dir is not None and to_dir != self.node.get_write_uri():
+            to_dir = to_dir.strip()
+            to_dir = to_dir.decode(charset)
+            assert isinstance(to_dir, unicode)
+            to_path = to_dir.split(u"/")
+            to_root = self.client.nodemaker.create_from_cap(to_str(to_path[0]))
+            if not IDirectoryNode.providedBy(to_root):
+                raise WebError("to_dir is not a directory", http.BAD_REQUEST)
+            d = to_root.get_child_at_path(to_path[1:])
+        else:
+            d = defer.succeed(self.node)
 
-        replace = boolean_of_arg(get_arg(req, "replace", "true"))
-        d = self.node.move_child_to(from_name, self.node, to_name, replace)
-        d.addCallback(lambda res: "thing renamed")
+        def _got_new_parent(new_parent):
+            if not IDirectoryNode.providedBy(new_parent):
+                raise WebError("to_dir is not a directory", http.BAD_REQUEST)
+
+            return self.node.move_child_to(from_name, new_parent,
+                                           to_name, replace)
+        d.addCallback(_got_new_parent)
+        d.addCallback(lambda res: "thing moved")
         return d
 
+    def _maybe_literal(self, res, Results_Class):
+        if res:
+            return Results_Class(self.client, res)
+        return LiteralCheckResultsRenderer(self.client)
+
     def _POST_check(self, req):
         # check this directory
         verify = boolean_of_arg(get_arg(req, "verify", "false"))
@@ -360,10 +446,10 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
         add_lease = boolean_of_arg(get_arg(req, "add-lease", "false"))
         if repair:
             d = self.node.check_and_repair(Monitor(), verify, add_lease)
-            d.addCallback(lambda res: CheckAndRepairResults(self.client, res))
+            d.addCallback(self._maybe_literal, CheckAndRepairResultsRenderer)
         else:
             d = self.node.check(Monitor(), verify, add_lease)
-            d.addCallback(lambda res: CheckResults(self.client, res))
+            d.addCallback(self._maybe_literal, CheckResultsRenderer)
         return d
 
     def _start_operation(self, monitor, renderer, ctx):
@@ -380,10 +466,10 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
         add_lease = boolean_of_arg(get_arg(ctx, "add-lease", "false"))
         if repair:
             monitor = self.node.start_deep_check_and_repair(verify, add_lease)
-            renderer = DeepCheckAndRepairResults(self.client, monitor)
+            renderer = DeepCheckAndRepairResultsRenderer(self.client, monitor)
         else:
             monitor = self.node.start_deep_check(verify, add_lease)
-            renderer = DeepCheckResults(self.client, monitor)
+            renderer = DeepCheckResultsRenderer(self.client, monitor)
         return self._start_operation(monitor, renderer, ctx)
 
     def _POST_stream_deep_check(self, ctx):
@@ -459,7 +545,7 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
         return d
 
     def _POST_set_children(self, req):
-        replace = boolean_of_arg(get_arg(req, "replace", "true"))
+        replace = parse_replace_arg(get_arg(req, "replace", "true"))
         req.content.seek(0)
         body = req.content.read()
         try:
@@ -468,11 +554,16 @@ class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
             le.args = tuple(le.args + (body,))
             # TODO test handling of bad JSON
             raise
-        cs = []
+        cs = {}
         for name, (file_or_dir, mddict) in children.iteritems():
             name = unicode(name) # simplejson-2.0.1 returns str *or* unicode
-            cap = str(mddict.get('rw_uri') or mddict.get('ro_uri'))
-            cs.append((name, cap, mddict.get('metadata')))
+            writecap = mddict.get('rw_uri')
+            if writecap is not None:
+                writecap = str(writecap)
+            readcap = mddict.get('ro_uri')
+            if readcap is not None:
+                readcap = str(readcap)
+            cs[name] = (writecap, readcap, mddict.get('metadata'))
         d = self.node.set_children(cs, replace)
         d.addCallback(lambda res: "Okay so I did it.")
         # TODO: results
@@ -482,16 +573,21 @@ def abbreviated_dirnode(dirnode):
     u = from_string_dirnode(dirnode.get_uri())
     return u.abbrev_si()
 
+SPACE = u"\u00A0"*2
+
 class DirectoryAsHTML(rend.Page):
     # The remainder of this class is to render the directory into
     # human+browser -oriented HTML.
     docFactory = getxmlfile("directory.xhtml")
     addSlash = True
 
-    def __init__(self, node):
+    def __init__(self, node, default_mutable_format):
         rend.Page.__init__(self)
         self.node = node
 
+        assert default_mutable_format in (MDMF_VERSION, SDMF_VERSION)
+        self.default_mutable_format = default_mutable_format
+
     def beforeRender(self, ctx):
         # attempt to get the dirnode's children, stashing them (or the
         # failure that results) for later use
@@ -525,8 +621,12 @@ class DirectoryAsHTML(rend.Page):
 
     def render_title(self, ctx, data):
         si_s = abbreviated_dirnode(self.node)
-        header = ["TahoeLAFS - Directory SI=%s" % si_s]
-        if self.node.is_readonly():
+        header = ["Tahoe-LAFS - Directory SI=%s" % si_s]
+        if self.node.is_unknown():
+            header.append(" (unknown)")
+        elif not self.node.is_mutable():
+            header.append(" (immutable)")
+        elif self.node.is_readonly():
             header.append(" (read-only)")
         else:
             header.append(" (modifiable)")
@@ -534,17 +634,21 @@ class DirectoryAsHTML(rend.Page):
 
     def render_header(self, ctx, data):
         si_s = abbreviated_dirnode(self.node)
-        header = ["TahoeLAFS Directory SI=", T.span(class_="data-chars")[si_s]]
-        if self.node.is_readonly():
+        header = ["Tahoe-LAFS Directory SI=", T.span(class_="data-chars")[si_s]]
+        if self.node.is_unknown():
+            header.append(" (unknown)")
+        elif not self.node.is_mutable():
+            header.append(" (immutable)")
+        elif self.node.is_readonly():
             header.append(" (read-only)")
         return ctx.tag[header]
 
     def render_welcome(self, ctx, data):
         link = get_root(ctx)
-        return T.div[T.a(href=link)["Return to Welcome page"]]
+        return ctx.tag[T.a(href=link)["Return to Welcome page"]]
 
     def render_show_readonly(self, ctx, data):
-        if self.node.is_readonly():
+        if self.node.is_unknown() or self.node.is_readonly():
             return ""
         rocap = self.node.get_readonly_uri()
         root = get_root(ctx)
@@ -571,56 +675,56 @@ class DirectoryAsHTML(rend.Page):
 
         root = get_root(ctx)
         here = "%s/uri/%s/" % (root, urllib.quote(self.node.get_uri()))
-        if self.node.is_readonly():
-            delete = "-"
+        if self.node.is_unknown() or self.node.is_readonly():
+            unlink = "-"
             rename = "-"
         else:
-            # this creates a button which will cause our child__delete method
-            # to be invoked, which deletes the file and then redirects the
+            # this creates a button which will cause our _POST_unlink method
+            # to be invoked, which unlinks the file and then redirects the
             # browser back to this directory
-            delete = T.form(action=here, method="post")[
-                T.input(type='hidden', name='t', value='delete'),
+            unlink = T.form(action=here, method="post")[
+                T.input(type='hidden', name='t', value='unlink'),
                 T.input(type='hidden', name='name', value=name),
                 T.input(type='hidden', name='when_done', value="."),
-                T.input(type='submit', value='del', name="del"),
+                T.input(type='submit', _class='btn', value='unlink', name="unlink"),
                 ]
 
             rename = T.form(action=here, method="get")[
                 T.input(type='hidden', name='t', value='rename-form'),
                 T.input(type='hidden', name='name', value=name),
                 T.input(type='hidden', name='when_done', value="."),
-                T.input(type='submit', value='rename', name="rename"),
+                T.input(type='submit', _class='btn', value='rename/relink', name="rename"),
                 ]
 
-        ctx.fillSlots("delete", delete)
+        ctx.fillSlots("unlink", unlink)
         ctx.fillSlots("rename", rename)
 
         times = []
         linkcrtime = metadata.get('tahoe', {}).get("linkcrtime")
         if linkcrtime is not None:
-            times.append("lcr: " + time_format.iso_local(linkcrtime))
+            times.append("lcr: " + render_time(linkcrtime))
         else:
             # For backwards-compatibility with links last modified by Tahoe < 1.4.0:
             if "ctime" in metadata:
-                ctime = time_format.iso_local(metadata["ctime"])
+                ctime = render_time(metadata["ctime"])
                 times.append("c: " + ctime)
         linkmotime = metadata.get('tahoe', {}).get("linkmotime")
         if linkmotime is not None:
             if times:
                 times.append(T.br())
-            times.append("lmo: " + time_format.iso_local(linkmotime))
+            times.append("lmo: " + render_time(linkmotime))
         else:
             # For backwards-compatibility with links last modified by Tahoe < 1.4.0:
             if "mtime" in metadata:
-                mtime = time_format.iso_local(metadata["mtime"])
+                mtime = render_time(metadata["mtime"])
                 if times:
                     times.append(T.br())
                 times.append("m: " + mtime)
         ctx.fillSlots("times", times)
 
         assert IFilesystemNode.providedBy(target), target
-        writecap = target.get_uri() or ""
-        quoted_uri = urllib.quote(writecap, safe="") # escape slashes too
+        target_uri = target.get_uri() or ""
+        quoted_uri = urllib.quote(target_uri, safe="") # escape slashes too
 
         if IMutableFileNode.providedBy(target):
             # to prevent javascript in displayed .html files from stealing a
@@ -628,19 +732,17 @@ class DirectoryAsHTML(rend.Page):
             # page that doesn't know about the directory at all
             dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, nameurl)
 
-            ctx.fillSlots("filename",
-                          T.a(href=dlurl)[html.escape(name)])
+            ctx.fillSlots("filename", T.a(href=dlurl)[name])
             ctx.fillSlots("type", "SSK")
 
             ctx.fillSlots("size", "?")
 
             info_link = "%s/uri/%s?t=info" % (root, quoted_uri)
 
-        elif IFileNode.providedBy(target):
+        elif IImmutableFileNode.providedBy(target):
             dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, nameurl)
 
-            ctx.fillSlots("filename",
-                          T.a(href=dlurl)[html.escape(name)])
+            ctx.fillSlots("filename", T.a(href=dlurl)[name])
             ctx.fillSlots("type", "FILE")
 
             ctx.fillSlots("size", target.get_size())
@@ -649,10 +751,11 @@ class DirectoryAsHTML(rend.Page):
 
         elif IDirectoryNode.providedBy(target):
             # directory
-            uri_link = "%s/uri/%s/" % (root, urllib.quote(writecap))
-            ctx.fillSlots("filename",
-                          T.a(href=uri_link)[html.escape(name)])
-            if target.is_readonly():
+            uri_link = "%s/uri/%s/" % (root, urllib.quote(target_uri))
+            ctx.fillSlots("filename", T.a(href=uri_link)[name])
+            if not target.is_mutable():
+                dirtype = "DIR-IMM"
+            elif target.is_readonly():
                 dirtype = "DIR-RO"
             else:
                 dirtype = "DIR"
@@ -660,19 +763,38 @@ class DirectoryAsHTML(rend.Page):
             ctx.fillSlots("size", "-")
             info_link = "%s/uri/%s/?t=info" % (root, quoted_uri)
 
+        elif isinstance(target, ProhibitedNode):
+            ctx.fillSlots("filename", T.strike[name])
+            if IDirectoryNode.providedBy(target.wrapped_node):
+                blacklisted_type = "DIR-BLACKLISTED"
+            else:
+                blacklisted_type = "BLACKLISTED"
+            ctx.fillSlots("type", blacklisted_type)
+            ctx.fillSlots("size", "-")
+            info_link = None
+            ctx.fillSlots("info", ["Access Prohibited:", T.br, target.reason])
+
         else:
             # unknown
-            ctx.fillSlots("filename", html.escape(name))
-            ctx.fillSlots("type", "?")
+            ctx.fillSlots("filename", name)
+            if target.get_write_uri() is not None:
+                unknowntype = "?"
+            elif not self.node.is_mutable() or target.is_alleged_immutable():
+                unknowntype = "?-IMM"
+            else:
+                unknowntype = "?-RO"
+            ctx.fillSlots("type", unknowntype)
             ctx.fillSlots("size", "-")
             # use a directory-relative info link, so we can extract both the
             # writecap and the readcap
             info_link = "%s?t=info" % urllib.quote(name)
 
-        ctx.fillSlots("info", T.a(href=info_link)["More Info"])
+        if info_link:
+            ctx.fillSlots("info", T.a(href=info_link)["More Info"])
 
         return ctx.tag
 
+    # XXX: similar to render_upload_form and render_mkdir_form in root.py.
     def render_forms(self, ctx, data):
         forms = []
 
@@ -681,89 +803,100 @@ class DirectoryAsHTML(rend.Page):
         if self.dirnode_children is None:
             return T.div["No upload forms: directory is unreadable"]
 
-        mkdir = T.form(action=".", method="post",
-                       enctype="multipart/form-data")[
+        mkdir_sdmf = T.input(type='radio', name='format',
+                             value='sdmf', id='mkdir-sdmf',
+                             checked='checked')
+        mkdir_mdmf = T.input(type='radio', name='format',
+                             value='mdmf', id='mkdir-mdmf')
+
+        mkdir_form = T.form(action=".", method="post",
+                            enctype="multipart/form-data")[
             T.fieldset[
             T.input(type="hidden", name="t", value="mkdir"),
             T.input(type="hidden", name="when_done", value="."),
             T.legend(class_="freeform-form-label")["Create a new directory in this directory"],
-            "New directory name: ",
-            T.input(type="text", name="name"), " ",
-            T.input(type="submit", value="Create"),
+            "New directory name:"+SPACE, T.br,
+            T.input(type="text", name="name"), SPACE,
+            T.div(class_="form-inline")[
+                mkdir_sdmf, T.label(for_='mutable-directory-sdmf')[SPACE, "SDMF"], SPACE*2,
+                mkdir_mdmf, T.label(for_='mutable-directory-mdmf')[SPACE, "MDMF (experimental)"]
+            ],
+            T.input(type="submit", class_="btn", value="Create")
             ]]
-        forms.append(T.div(class_="freeform-form")[mkdir])
-
-        upload = T.form(action=".", method="post",
-                        enctype="multipart/form-data")[
+        forms.append(T.div(class_="freeform-form")[mkdir_form])
+
+        upload_chk  = T.input(type='radio', name='format',
+                              value='chk', id='upload-chk',
+                              checked='checked')
+        upload_sdmf = T.input(type='radio', name='format',
+                              value='sdmf', id='upload-sdmf')
+        upload_mdmf = T.input(type='radio', name='format',
+                              value='mdmf', id='upload-mdmf')
+
+        upload_form = T.form(action=".", method="post",
+                             enctype="multipart/form-data")[
             T.fieldset[
             T.input(type="hidden", name="t", value="upload"),
             T.input(type="hidden", name="when_done", value="."),
             T.legend(class_="freeform-form-label")["Upload a file to this directory"],
-            "Choose a file to upload: ",
-            T.input(type="file", name="file", class_="freeform-input-file"),
-            " ",
-            T.input(type="submit", value="Upload"),
-            " Mutable?:",
-            T.input(type="checkbox", name="mutable"),
-            ]]
-        forms.append(T.div(class_="freeform-form")[upload])
-
-        mount = T.form(action=".", method="post",
-                        enctype="multipart/form-data")[
-            T.fieldset[
-            T.input(type="hidden", name="t", value="uri"),
-            T.input(type="hidden", name="when_done", value="."),
-            T.legend(class_="freeform-form-label")["Add a link to a file or directory which is already in TahoeLAFS."],
-            "New child name: ",
-            T.input(type="text", name="name"), " ",
-            "URI of new child: ",
-            T.input(type="text", name="uri"), " ",
-            T.input(type="submit", value="Attach"),
+            "Choose a file to upload:"+SPACE,
+            T.input(type="file", name="file", class_="freeform-input-file"), SPACE,
+            T.div(class_="form-inline")[
+                upload_chk,  T.label(for_="upload-chk") [SPACE, "Immutable"], SPACE*2,
+                upload_sdmf, T.label(for_="upload-sdmf")[SPACE, "SDMF"], SPACE*2,
+                upload_mdmf, T.label(for_="upload-mdmf")[SPACE, "MDMF (experimental)"]
+            ],
+            T.input(type="submit", class_="btn", value="Upload"),             SPACE*2,
             ]]
-        forms.append(T.div(class_="freeform-form")[mount])
+        forms.append(T.div(class_="freeform-form")[upload_form])
+
+        attach_form = T.form(action=".", method="post",
+                             enctype="multipart/form-data")[
+            T.fieldset[ T.div(class_="form-inline")[
+                T.input(type="hidden", name="t", value="uri"),
+                T.input(type="hidden", name="when_done", value="."),
+                T.legend(class_="freeform-form-label")["Add a link to a file or directory which is already in Tahoe-LAFS."],
+                "New child name:"+SPACE,
+                T.input(type="text", name="name"), SPACE*2, T.br,
+                "URI of new child:"+SPACE,
+                T.input(type="text", name="uri"), SPACE,
+                T.input(type="submit", class_="btn", value="Attach"),
+            ]]]
+        forms.append(T.div(class_="freeform-form")[attach_form])
         return forms
 
     def render_results(self, ctx, data):
         req = IRequest(ctx)
         return get_arg(req, "results", "")
 
-
 def DirectoryJSONMetadata(ctx, dirnode):
     d = dirnode.list()
     def _got(children):
         kids = {}
         for name, (childnode, metadata) in children.iteritems():
             assert IFilesystemNode.providedBy(childnode), childnode
-            rw_uri = childnode.get_uri()
+            rw_uri = childnode.get_write_uri()
             ro_uri = childnode.get_readonly_uri()
-            if (IDirectoryNode.providedBy(childnode)
-                or IFileNode.providedBy(childnode)):
-                if childnode.is_readonly():
-                    rw_uri = None
             if IFileNode.providedBy(childnode):
-                kiddata = ("filenode", {'size': childnode.get_size(),
-                                        'mutable': childnode.is_mutable(),
-                                        })
+                kiddata = ("filenode", get_filenode_metadata(childnode))
             elif IDirectoryNode.providedBy(childnode):
-                kiddata = ("dirnode", {'mutable': childnode.is_mutable(),
-                                       })
+                kiddata = ("dirnode", {'mutable': childnode.is_mutable()})
             else:
                 kiddata = ("unknown", {})
+
             kiddata[1]["metadata"] = metadata
-            if ro_uri:
-                kiddata[1]["ro_uri"] = ro_uri
             if rw_uri:
                 kiddata[1]["rw_uri"] = rw_uri
+            if ro_uri:
+                kiddata[1]["ro_uri"] = ro_uri
             verifycap = childnode.get_verify_cap()
             if verifycap:
                 kiddata[1]['verify_uri'] = verifycap.to_string()
+
             kids[name] = kiddata
-        if dirnode.is_readonly():
-            drw_uri = None
-            dro_uri = dirnode.get_uri()
-        else:
-            drw_uri = dirnode.get_uri()
-            dro_uri = dirnode.get_readonly_uri()
+
+        drw_uri = dirnode.get_write_uri()
+        dro_uri = dirnode.get_readonly_uri()
         contents = { 'children': kids }
         if dro_uri:
             contents['ro_uri'] = dro_uri
@@ -774,13 +907,13 @@ def DirectoryJSONMetadata(ctx, dirnode):
             contents['verify_uri'] = verifycap.to_string()
         contents['mutable'] = dirnode.is_mutable()
         data = ("dirnode", contents)
-        return simplejson.dumps(data, indent=1) + "\n"
+        json = simplejson.dumps(data, indent=1) + "\n"
+        return json
     d.addCallback(_got)
     d.addCallback(text_plain, ctx)
     return d
 
 
-
 def DirectoryURI(ctx, dirnode):
     return text_plain(dirnode.get_uri(), ctx)
 
@@ -813,7 +946,6 @@ class RenameForm(rend.Page):
         ctx.tag.attributes['value'] = name
         return ctx.tag
 
-
 class ManifestResults(rend.Page, ReloadMixin):
     docFactory = getxmlfile("manifest.xhtml")
 
@@ -849,9 +981,13 @@ class ManifestResults(rend.Page, ReloadMixin):
         m = self.monitor
         s = m.get_status()
 
+        if m.origin_si:
+            origin_base32 = base32.b2a(m.origin_si)
+        else:
+            origin_base32 = ""
         status = { "stats": s["stats"],
                    "finished": m.is_finished(),
-                   "origin": base32.b2a(m.origin_si),
+                   "origin": origin_base32,
                    }
         if m.is_finished():
             # don't return manifest/verifycaps/SIs unless the operation is
@@ -872,7 +1008,10 @@ class ManifestResults(rend.Page, ReloadMixin):
         return simplejson.dumps(status, indent=1)
 
     def _si_abbrev(self):
-        return base32.b2a(self.monitor.origin_si)[:6]
+        si = self.monitor.origin_si
+        if not si:
+            return "<LIT>"
+        return base32.b2a(si)[:6]
 
     def render_title(self, ctx):
         return T.title["Manifest of SI=%s" % self._si_abbrev()]
@@ -970,17 +1109,17 @@ class ManifestStreamer(dirnode.DeepStats):
         v = node.get_verify_cap()
         if v:
             v = v.to_string()
-        d["verifycap"] = v
+        d["verifycap"] = v or ""
 
         r = node.get_repair_cap()
         if r:
             r = r.to_string()
-        d["repaircap"] = r
+        d["repaircap"] = r or ""
 
         si = node.get_storage_index()
         if si:
             si = base32.b2a(si)
-        d["storage-index"] = si
+        d["storage-index"] = si or ""
 
         j = simplejson.dumps(d, ensure_ascii=True)
         assert "\n" not in j
@@ -1022,23 +1161,25 @@ class DeepCheckStreamer(dirnode.DeepStats):
 
         if IDirectoryNode.providedBy(node):
             data["type"] = "directory"
-        else:
+        elif IFileNode.providedBy(node):
             data["type"] = "file"
+        else:
+            data["type"] = "unknown"
 
         v = node.get_verify_cap()
         if v:
             v = v.to_string()
-        data["verifycap"] = v
+        data["verifycap"] = v or ""
 
         r = node.get_repair_cap()
         if r:
             r = r.to_string()
-        data["repaircap"] = r
+        data["repaircap"] = r or ""
 
         si = node.get_storage_index()
         if si:
             si = base32.b2a(si)
-        data["storage-index"] = si
+        data["storage-index"] = si or ""
 
         if self.repair:
             d = node.check_and_repair(self.monitor, self.verify, self.add_lease)
@@ -1072,18 +1213,45 @@ class DeepCheckStreamer(dirnode.DeepStats):
         self.req.write(j+"\n")
         return ""
 
-class UnknownNodeHandler(RenderMixin, rend.Page):
 
+class UnknownNodeHandler(RenderMixin, rend.Page):
     def __init__(self, client, node, parentnode=None, name=None):
         rend.Page.__init__(self)
         assert node
         self.node = node
+        self.parentnode = parentnode
+        self.name = name
 
     def render_GET(self, ctx):
         req = IRequest(ctx)
         t = get_arg(req, "t", "").strip()
         if t == "info":
             return MoreInfo(self.node)
-        raise WebError("GET unknown URI type: can only do t=info, not t=%s" % t)
-
-
+        if t == "json":
+            is_parent_known_immutable = self.parentnode and not self.parentnode.is_mutable()
+            if self.parentnode and self.name:
+                d = self.parentnode.get_metadata_for(self.name)
+            else:
+                d = defer.succeed(None)
+            d.addCallback(lambda md: UnknownJSONMetadata(ctx, self.node, md, is_parent_known_immutable))
+            return d
+        raise WebError("GET unknown URI type: can only do t=info and t=json, not t=%s.\n"
+                       "Using a webapi server that supports a later version of Tahoe "
+                       "may help." % t)
+
+def UnknownJSONMetadata(ctx, node, edge_metadata, is_parent_known_immutable):
+    rw_uri = node.get_write_uri()
+    ro_uri = node.get_readonly_uri()
+    data = ("unknown", {})
+    if ro_uri:
+        data[1]['ro_uri'] = ro_uri
+    if rw_uri:
+        data[1]['rw_uri'] = rw_uri
+        data[1]['mutable'] = True
+    elif is_parent_known_immutable or node.is_alleged_immutable():
+        data[1]['mutable'] = False
+    # else we don't know whether it is mutable.
+
+    if edge_metadata is not None:
+        data[1]['metadata'] = edge_metadata
+    return text_plain(simplejson.dumps(data, indent=1) + "\n", ctx)