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, inevow, tags as T
10 from nevow.inevow import IRequest
12 from foolscap.eventual import fireEventually
14 from allmydata.util import base32
15 from allmydata.uri import from_string_dirnode
16 from allmydata.interfaces import IDirectoryNode, IFileNode, IMutableFileNode, \
18 from allmydata.web.common import text_plain, WebError, IClient, \
19 boolean_of_arg, get_arg, should_create_intermediate_directories, \
20 getxmlfile, RenderMixin
21 from allmydata.web.filenode import ReplaceMeMixin, \
22 FileNodeHandler, PlaceHolderNodeHandler
23 from allmydata.web.checker_results import CheckerResults, \
24 CheckAndRepairResults, DeepCheckResults, DeepCheckAndRepairResults
25 from allmydata.web.info import MoreInfo
27 class BlockingFileError(Exception):
28 # TODO: catch and transform
29 """We cannot auto-create a parent directory, because there is a file in
32 def make_handler_for(node, parentnode=None, name=None):
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)
43 class DirectoryNodeHandler(RenderMixin, rend.Page, ReplaceMeMixin):
46 def __init__(self, node, parentnode=None, name=None):
47 rend.Page.__init__(self)
50 self.parentnode = parentnode
53 def childFactory(self, ctx, name):
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
62 def got_child(self, node_or_failure, ctx, name):
64 if DEBUG: print "GOT_CHILD", name, node_or_failure
67 nonterminal = len(req.postpath) > 1
68 t = get_arg(req, "t", "").strip()
69 if isinstance(node_or_failure, Failure):
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
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)
84 if DEBUG: print " terminal"
86 if (method,t) in [ ("POST","mkdir"), ("PUT","mkdir") ]:
87 if DEBUG: print " making final directory"
89 d = self.node.create_empty_directory(name)
90 d.addCallback(make_handler_for, self.node, name)
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()
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
109 if DEBUG: print "blocking"
110 raise WebError("Unable to create directory '%s': "
111 "a file was in the way" % name,
113 if DEBUG: print "good child"
114 return make_handler_for(node, self.node, name)
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())
122 def render_GET(self, ctx):
123 client = IClient(ctx)
125 # This is where all of the directory-related ?t=* code goes.
126 t = get_arg(req, "t", "").strip()
128 # render the directory as HTML, using the docFactory and Nevow's
129 # whole templating thing.
130 return DirectoryAsHTML(self.node)
133 return DirectoryJSONMetadata(ctx, self.node)
135 return MoreInfo(self.node)
137 return DirectoryURI(ctx, self.node)
138 if t == "readonly-uri":
139 return DirectoryReadonlyURI(ctx, self.node)
141 return Manifest(self.node)
143 return DeepSize(ctx, self.node)
144 if t == "deep-stats":
145 return DeepStats(ctx, self.node)
146 if t == 'rename-form':
147 return RenameForm(self.node)
149 raise WebError("GET directory: bad t=%s" % t)
151 def render_PUT(self, ctx):
153 t = get_arg(req, "t", "").strip()
154 replace = boolean_of_arg(get_arg(req, "replace", "true"))
156 # our job was done by the traversal/create-intermediate-directory
157 # process that got us here.
158 return text_plain(self.node.get_uri(), ctx) # TODO: urlencode
161 # they're trying to set_uri and that name is already occupied
163 raise ExistingChildError()
164 d = self.parentnode.replace_me_with_a_childcap(ctx, replace)
168 raise WebError("PUT to a directory")
170 def render_POST(self, ctx):
172 t = get_arg(req, "t", "").strip()
174 d = self._POST_mkdir(req)
177 d = self._POST_mkdir_p(req)
179 d = self._POST_upload(ctx) # this one needs the context
181 d = self._POST_uri(req)
183 d = self._POST_delete(req)
185 d = self._POST_rename(req)
187 d = self._POST_check(req)
188 elif t == "deep-check":
189 d = self._POST_deep_check(req)
190 elif t == "set_children":
192 d = self._POST_set_children(req)
194 raise WebError("POST to a directory with bad t=%s" % t)
196 when_done = get_arg(req, "when_done", None)
198 d.addCallback(lambda res: url.URL.fromString(when_done))
201 def _POST_mkdir(self, req):
202 name = get_arg(req, "name", "")
204 # our job is done, it was handled by the code in got_child
205 # which created the final directory (i.e. us)
206 return defer.succeed(self.node.get_uri()) # TODO: urlencode
207 name = name.decode("utf-8")
208 replace = boolean_of_arg(get_arg(req, "replace", "true"))
209 d = self.node.create_empty_directory(name, overwrite=replace)
210 d.addCallback(lambda child: child.get_uri()) # TODO: urlencode
213 def _POST_mkdir_p(self, req):
214 path = get_arg(req, "path")
216 raise WebError("mkdir-p requires a path")
217 path_ = tuple([seg.decode("utf-8") for seg in path.split('/') if seg ])
219 d = self._get_or_create_directories(self.node, path_)
220 d.addCallback(lambda node: node.get_uri())
223 def _get_or_create_directories(self, node, path):
224 if not IDirectoryNode.providedBy(node):
225 # unfortunately it is too late to provide the name of the
226 # blocking directory in the error message.
227 raise BlockingFileError("cannot create directory because there "
228 "is a file in the way")
230 return defer.succeed(node)
231 d = node.get(path[0])
232 def _maybe_create(f):
234 return node.create_empty_directory(path[0])
235 d.addErrback(_maybe_create)
236 d.addCallback(self._get_or_create_directories, path[1:])
239 def _POST_upload(self, ctx):
241 charset = get_arg(req, "_charset", "utf-8")
242 contents = req.fields["file"]
243 assert contents.filename is None or isinstance(contents.filename, str)
244 name = get_arg(req, "name")
245 name = name or contents.filename
249 # this prohibts empty, missing, and all-whitespace filenames
250 raise WebError("upload requires a name")
251 assert isinstance(name, str)
252 name = name.decode(charset)
254 raise WebError("name= may not contain a slash", http.BAD_REQUEST)
255 assert isinstance(name, unicode)
257 # since POST /uri/path/file?t=upload is equivalent to
258 # POST /uri/path/dir?t=upload&name=foo, just do the same thing that
259 # childFactory would do. Things are cleaner if we only do a subset of
260 # them, though, so we don't do: d = self.childFactory(ctx, name)
262 d = self.node.get(name)
263 def _maybe_got_node(node_or_failure):
264 if isinstance(node_or_failure, Failure):
267 # create a placeholder which will see POST t=upload
268 return PlaceHolderNodeHandler(self.node, name)
270 node = node_or_failure
271 return make_handler_for(node, self.node, name)
272 d.addBoth(_maybe_got_node)
273 # now we have a placeholder or a filenodehandler, and we can just
274 # delegate to it. We could return the resource back out of
275 # DirectoryNodeHandler.renderHTTP, and nevow would recurse into it,
276 # but the addCallback() that handles when_done= would break.
277 d.addCallback(lambda child: child.renderHTTP(ctx))
280 def _POST_uri(self, req):
281 childcap = get_arg(req, "uri")
283 raise WebError("set-uri requires a uri")
284 name = get_arg(req, "name")
286 raise WebError("set-uri requires a name")
287 charset = get_arg(req, "_charset", "utf-8")
288 name = name.decode(charset)
289 replace = boolean_of_arg(get_arg(req, "replace", "true"))
290 d = self.node.set_uri(name, childcap, overwrite=replace)
291 d.addCallback(lambda res: childcap)
294 def _POST_delete(self, req):
295 name = get_arg(req, "name")
297 # apparently an <input type="hidden" name="name" value="">
298 # won't show up in the resulting encoded form.. the 'name'
299 # field is completely missing. So to allow deletion of an
300 # empty file, we have to pretend that None means ''. The only
301 # downide of this is a slightly confusing error message if
302 # someone does a POST without a name= field. For our own HTML
303 # thisn't a big deal, because we create the 'delete' POST
306 charset = get_arg(req, "_charset", "utf-8")
307 name = name.decode(charset)
308 d = self.node.delete(name)
309 d.addCallback(lambda res: "thing deleted")
312 def _POST_rename(self, req):
313 charset = get_arg(req, "_charset", "utf-8")
314 from_name = get_arg(req, "from_name")
315 if from_name is not None:
316 from_name = from_name.strip()
317 from_name = from_name.decode(charset)
318 assert isinstance(from_name, unicode)
319 to_name = get_arg(req, "to_name")
320 if to_name is not None:
321 to_name = to_name.strip()
322 to_name = to_name.decode(charset)
323 assert isinstance(to_name, unicode)
324 if not from_name or not to_name:
325 raise WebError("rename requires from_name and to_name")
327 # allow from_name to contain slashes, so they can fix names that were
328 # accidentally created with them. But disallow them in to_name, to
329 # discourage the practice.
331 raise WebError("to_name= may not contain a slash", http.BAD_REQUEST)
333 replace = boolean_of_arg(get_arg(req, "replace", "true"))
334 d = self.node.move_child_to(from_name, self.node, to_name, replace)
335 d.addCallback(lambda res: "thing renamed")
338 def _POST_check(self, req):
339 # check this directory
340 verify = boolean_of_arg(get_arg(req, "verify", "false"))
341 repair = boolean_of_arg(get_arg(req, "repair", "false"))
343 d = self.node.check_and_repair(verify)
344 d.addCallback(lambda res: CheckAndRepairResults(res))
346 d = self.node.check(verify)
347 d.addCallback(lambda res: CheckerResults(res))
350 def _POST_deep_check(self, req):
351 # check this directory and everything reachable from it
352 verify = boolean_of_arg(get_arg(req, "verify", "false"))
353 repair = boolean_of_arg(get_arg(req, "repair", "false"))
355 d = self.node.deep_check_and_repair(verify)
356 d.addCallback(lambda res: DeepCheckAndRepairResults(res))
358 d = self.node.deep_check(verify)
359 d.addCallback(lambda res: DeepCheckResults(res))
362 def _POST_set_children(self, req):
363 replace = boolean_of_arg(get_arg(req, "replace", "true"))
365 body = req.content.read()
367 children = simplejson.loads(body)
368 except ValueError, le:
369 le.args = tuple(le.args + (body,))
370 # TODO test handling of bad JSON
373 for name, (file_or_dir, mddict) in children.iteritems():
374 name = unicode(name) # simplejson-2.0.1 returns str *or* unicode
375 cap = str(mddict.get('rw_uri') or mddict.get('ro_uri'))
376 cs.append((name, cap, mddict.get('metadata')))
377 d = self.node.set_children(cs, replace)
378 d.addCallback(lambda res: "Okay so I did it.")
382 def abbreviated_dirnode(dirnode):
383 u = from_string_dirnode(dirnode.get_uri())
384 si = u.get_filenode_uri().storage_index
385 si_s = base32.b2a(si)
388 class DirectoryAsHTML(rend.Page):
389 # The remainder of this class is to render the directory into
390 # human+browser -oriented HTML.
391 docFactory = getxmlfile("directory.xhtml")
394 def __init__(self, node):
395 rend.Page.__init__(self)
398 def render_title(self, ctx, data):
399 si_s = abbreviated_dirnode(self.node)
400 header = ["Directory SI=%s" % si_s]
401 return ctx.tag[header]
403 def render_header(self, ctx, data):
404 si_s = abbreviated_dirnode(self.node)
405 header = ["Directory SI=%s" % si_s]
406 if self.node.is_readonly():
407 header.append(" (readonly)")
408 return ctx.tag[header]
410 def get_root(self, ctx):
412 # the addSlash=True gives us one extra (empty) segment
413 depth = len(req.prepath) + len(req.postpath) - 1
414 link = "/".join([".."] * depth)
417 def render_welcome(self, ctx, data):
418 link = self.get_root(ctx)
419 return T.div[T.a(href=link)["Return to Welcome page"]]
421 def data_children(self, ctx, data):
423 d.addCallback(lambda dict: sorted(dict.items()))
424 def _stall_some(items):
425 # Deferreds don't optimize out tail recursion, and the way
426 # Nevow's flattener handles Deferreds doesn't take this into
427 # account. As a result, large lists of Deferreds that fire in the
428 # same turn (i.e. the output of defer.succeed) will cause a stack
429 # overflow. To work around this, we insert a turn break after
430 # every 100 items, using foolscap's fireEventually(). This gives
431 # the stack a chance to be popped. It would also work to put
432 # every item in its own turn, but that'd be a lot more
433 # inefficient. This addresses ticket #237, for which I was never
434 # able to create a failing unit test.
436 for i,item in enumerate(items):
438 output.append(fireEventually(item))
442 d.addCallback(_stall_some)
445 def render_row(self, ctx, data):
446 name, (target, metadata) = data
447 name = name.encode("utf-8")
448 assert not isinstance(name, unicode)
449 nameurl = urllib.quote(name, safe="") # encode any slashes too
451 root = self.get_root(ctx)
452 here = "%s/uri/%s/" % (root, urllib.quote(self.node.get_uri()))
453 if self.node.is_readonly():
457 # this creates a button which will cause our child__delete method
458 # to be invoked, which deletes the file and then redirects the
459 # browser back to this directory
460 delete = T.form(action=here, method="post")[
461 T.input(type='hidden', name='t', value='delete'),
462 T.input(type='hidden', name='name', value=name),
463 T.input(type='hidden', name='when_done', value="."),
464 T.input(type='submit', value='del', name="del"),
467 rename = T.form(action=here, method="get")[
468 T.input(type='hidden', name='t', value='rename-form'),
469 T.input(type='hidden', name='name', value=name),
470 T.input(type='hidden', name='when_done', value="."),
471 T.input(type='submit', value='rename', name="rename"),
474 ctx.fillSlots("delete", delete)
475 ctx.fillSlots("rename", rename)
478 TIME_FORMAT = "%H:%M:%S %d-%b-%Y"
479 if "ctime" in metadata:
480 ctime = time.strftime(TIME_FORMAT,
481 time.localtime(metadata["ctime"]))
482 times.append("c: " + ctime)
483 if "mtime" in metadata:
484 mtime = time.strftime(TIME_FORMAT,
485 time.localtime(metadata["mtime"]))
488 times.append("m: " + mtime)
489 ctx.fillSlots("times", times)
491 assert (IFileNode.providedBy(target)
492 or IDirectoryNode.providedBy(target)
493 or IMutableFileNode.providedBy(target)), target
495 quoted_uri = urllib.quote(target.get_uri())
497 if IMutableFileNode.providedBy(target):
498 # to prevent javascript in displayed .html files from stealing a
499 # secret directory URI from the URL, send the browser to a URI-based
500 # page that doesn't know about the directory at all
501 dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, nameurl)
503 ctx.fillSlots("filename",
504 T.a(href=dlurl)[html.escape(name)])
505 ctx.fillSlots("type", "SSK")
507 ctx.fillSlots("size", "?")
509 text_plain_url = "%s/file/%s/@@named=/foo.txt" % (root, quoted_uri)
510 info_link = "%s?t=info" % nameurl
512 elif IFileNode.providedBy(target):
513 dlurl = "%s/file/%s/@@named=/%s" % (root, quoted_uri, nameurl)
515 ctx.fillSlots("filename",
516 T.a(href=dlurl)[html.escape(name)])
517 ctx.fillSlots("type", "FILE")
519 ctx.fillSlots("size", target.get_size())
521 text_plain_url = "%s/file/%s/@@named=/foo.txt" % (root, quoted_uri)
522 info_link = "%s?t=info" % nameurl
524 elif IDirectoryNode.providedBy(target):
526 uri_link = "%s/uri/%s/" % (root, urllib.quote(target.get_uri()))
527 ctx.fillSlots("filename",
528 T.a(href=uri_link)[html.escape(name)])
529 if target.is_readonly():
533 ctx.fillSlots("type", dirtype)
534 ctx.fillSlots("size", "-")
535 info_link = "%s/?t=info" % nameurl
537 ctx.fillSlots("info", T.a(href=info_link)["More Info"])
541 def render_forms(self, ctx, data):
544 if self.node.is_readonly():
545 forms.append(T.div["No upload forms: directory is read-only"])
548 mkdir = T.form(action=".", method="post",
549 enctype="multipart/form-data")[
551 T.input(type="hidden", name="t", value="mkdir"),
552 T.input(type="hidden", name="when_done", value="."),
553 T.legend(class_="freeform-form-label")["Create a new directory"],
554 "New directory name: ",
555 T.input(type="text", name="name"), " ",
556 T.input(type="submit", value="Create"),
558 forms.append(T.div(class_="freeform-form")[mkdir])
560 upload = T.form(action=".", method="post",
561 enctype="multipart/form-data")[
563 T.input(type="hidden", name="t", value="upload"),
564 T.input(type="hidden", name="when_done", value="."),
565 T.legend(class_="freeform-form-label")["Upload a file to this directory"],
566 "Choose a file to upload: ",
567 T.input(type="file", name="file", class_="freeform-input-file"),
569 T.input(type="submit", value="Upload"),
571 T.input(type="checkbox", name="mutable"),
573 forms.append(T.div(class_="freeform-form")[upload])
575 mount = T.form(action=".", method="post",
576 enctype="multipart/form-data")[
578 T.input(type="hidden", name="t", value="uri"),
579 T.input(type="hidden", name="when_done", value="."),
580 T.legend(class_="freeform-form-label")["Attach a file or directory"
584 T.input(type="text", name="name"), " ",
585 "URI of new child: ",
586 T.input(type="text", name="uri"), " ",
587 T.input(type="submit", value="Attach"),
589 forms.append(T.div(class_="freeform-form")[mount])
592 def render_results(self, ctx, data):
594 return get_arg(req, "results", "")
597 def DirectoryJSONMetadata(ctx, dirnode):
601 for name, (childnode, metadata) in children.iteritems():
602 if childnode.is_readonly():
604 ro_uri = childnode.get_uri()
606 rw_uri = childnode.get_uri()
607 ro_uri = childnode.get_readonly_uri()
608 if IFileNode.providedBy(childnode):
609 kiddata = ("filenode", {'size': childnode.get_size(),
610 'metadata': metadata,
613 assert IDirectoryNode.providedBy(childnode), (childnode,
615 kiddata = ("dirnode", {'metadata': metadata})
617 kiddata[1]["ro_uri"] = ro_uri
619 kiddata[1]["rw_uri"] = rw_uri
620 kiddata[1]['mutable'] = childnode.is_mutable()
622 if dirnode.is_readonly():
624 dro_uri = dirnode.get_uri()
626 drw_uri = dirnode.get_uri()
627 dro_uri = dirnode.get_readonly_uri()
628 contents = { 'children': kids }
630 contents['ro_uri'] = dro_uri
632 contents['rw_uri'] = drw_uri
633 contents['mutable'] = dirnode.is_mutable()
634 data = ("dirnode", contents)
635 return simplejson.dumps(data, indent=1) + "\n"
637 d.addCallback(text_plain, ctx)
642 def DirectoryURI(ctx, dirnode):
643 return text_plain(dirnode.get_uri(), ctx)
645 def DirectoryReadonlyURI(ctx, dirnode):
646 return text_plain(dirnode.get_readonly_uri(), ctx)
648 class RenameForm(rend.Page):
650 docFactory = getxmlfile("rename-form.xhtml")
652 def render_title(self, ctx, data):
653 return ctx.tag["Directory SI=%s" % abbreviated_dirnode(self.original)]
655 def render_header(self, ctx, data):
657 "in directory SI=%s" % abbreviated_dirnode(self.original),
660 if self.original.is_readonly():
661 header.append(" (readonly!)")
663 return ctx.tag[header]
665 def render_when_done(self, ctx, data):
666 return T.input(type="hidden", name="when_done", value=".")
668 def render_get_name(self, ctx, data):
670 name = get_arg(req, "name", "")
671 ctx.tag.attributes['value'] = name
675 class Manifest(rend.Page):
676 docFactory = getxmlfile("manifest.xhtml")
678 def renderHTTP(self, ctx):
679 output = get_arg(inevow.IRequest(ctx), "output", "html").lower()
681 return self.text(ctx)
683 return self.json(ctx)
684 return rend.Page.renderHTTP(self, ctx)
686 def slashify_path(self, path):
689 return "/".join([p.encode("utf-8") for p in path])
692 inevow.IRequest(ctx).setHeader("content-type", "text/plain")
693 d = self.original.build_manifest()
694 def _render_text(manifest):
696 for (path, cap) in manifest:
697 lines.append(self.slashify_path(path) + " " + cap)
698 return "\n".join(lines) + "\n"
699 d.addCallback(_render_text)
703 inevow.IRequest(ctx).setHeader("content-type", "text/plain")
704 d = self.original.build_manifest()
705 d.addCallback(lambda manifest: simplejson.dumps(manifest))
708 def render_title(self, ctx):
709 return T.title["Manifest of SI=%s" % abbreviated_dirnode(self.original)]
711 def render_header(self, ctx):
712 return T.p["Manifest of SI=%s" % abbreviated_dirnode(self.original)]
714 def data_items(self, ctx, data):
715 return self.original.build_manifest()
717 def render_row(self, ctx, (path, cap)):
718 ctx.fillSlots("path", self.slashify_path(path))
719 ctx.fillSlots("cap", cap)
722 def DeepSize(ctx, dirnode):
723 d = dirnode.deep_stats()
724 def _measure_size(stats):
725 total = (stats.get("size-immutable-files", 0)
726 + stats.get("size-mutable-files", 0)
727 + stats.get("size-directories", 0))
729 d.addCallback(_measure_size)
730 d.addCallback(text_plain, ctx)
733 def DeepStats(ctx, dirnode):
734 d = dirnode.deep_stats()
735 d.addCallback(simplejson.dumps, indent=1)
736 d.addCallback(text_plain, ctx)