def writeFile(self, filename, mimetype, fileobject):
"""Does the I/O dirty work after it calls isSafeToWrite to make
sure it's safe to write this file.
"""
filestream = stream.FileStream(fileobject)
if self.isSafeToWrite(filename, mimetype, filestream):
outname = self.makeUniqueName(filename)
flags = os.O_WRONLY | os.O_CREAT | os.O_EXCL | getattr(
os, "O_BINARY", 0)
fileobject = os.fdopen(os.open(outname, flags, self.permissions),
'wb', 0)
stream.readIntoFile(filestream, fileobject)
return outname
class File(StaticRenderMixin):
"""
File is a resource that represents a plain non-interpreted file
(although it can look for an extension like .rpy or .cgi and hand the
file to a processor for interpretation if you wish). Its constructor
takes a file path.
Alternatively, you can give a directory path to the constructor. In this
case the resource will represent that directory, and its children will
be files underneath that directory. This provides access to an entire
filesystem tree with a single Resource.
If you map the URL C{http://server/FILE} to a resource created as
File('/tmp'), C{http://server/FILE/foo/bar.html} will return the contents of
C{/tmp/foo/bar.html} .
"""
implements(iweb.IResource)
def _getContentTypes(self):
if not hasattr(File, "_sharedContentTypes"):
File._sharedContentTypes = loadMimeTypes()
return File._sharedContentTypes
contentTypes = property(_getContentTypes)
contentEncodings = {".gz": "gzip", ".bz2": "bzip2"}
processors = {}
indexNames = ["index", "index.html", "index.htm", "index.trp", "index.rpy"]
type = None
def __init__(self,
path,
defaultType="text/plain",
ignoredExts=(),
processors=None,
indexNames=None):
"""Create a file with the given path.
"""
super(File, self).__init__()
self.putChildren = {}
if isinstance(path, FilePath):
self.fp = path
else:
assert isinstance(path, str), "This should be a string."
self.fp = FilePath(path)
# Remove the dots from the path to split
self.defaultType = defaultType
self.ignoredExts = list(ignoredExts)
if processors is not None:
self.processors = dict([(key.lower(), value)
for key, value in processors.items()])
if indexNames is not None:
self.indexNames = indexNames
def comparePath(self, path):
if isinstance(path, FilePath):
return path.path == self.fp.path
else:
return path == self.fp.path
def exists(self):
return self.fp.exists()
def etag(self):
if not self.fp.exists(): return succeed(None)
st = self.fp.statinfo
#
# Mark ETag as weak if it was modified more recently than we can
# measure and report, as it could be modified again in that span
# and we then wouldn't know to provide a new ETag.
#
weak = (time.time() - st.st_mtime <= 1)
return succeed(
http_headers.ETag("%X-%X-%X" %
(st.st_ino, st.st_size, st.st_mtime),
weak=weak))
def lastModified(self):
if self.fp.exists():
return self.fp.getmtime()
else:
return None
def creationDate(self):
if self.fp.exists():
return self.fp.getmtime()
else:
return None
def contentLength(self):
if self.fp.exists():
if self.fp.isfile():
return self.fp.getsize()
else:
# Computing this would require rendering the resource; let's
# punt instead.
return None
else:
return None
def _initTypeAndEncoding(self):
self._type, self._encoding = getTypeAndEncoding(
self.fp.basename(), self.contentTypes, self.contentEncodings,
self.defaultType)
# Handle cases not covered by getTypeAndEncoding()
if self.fp.isdir(): self._type = "httpd/unix-directory"
def contentType(self):
if not hasattr(self, "_type"):
self._initTypeAndEncoding()
return http_headers.MimeType.fromString(self._type)
def contentEncoding(self):
if not hasattr(self, "_encoding"):
self._initTypeAndEncoding()
return self._encoding
def displayName(self):
if self.fp.exists():
return self.fp.basename()
else:
return None
def ignoreExt(self, ext):
"""Ignore the given extension.
Serve file.ext if file is requested
"""
self.ignoredExts.append(ext)
def putChild(self, name, child):
"""
Register a child with the given name with this resource.
@param name: the name of the child (a URI path segment)
@param child: the child to register
"""
self.putChildren[name] = child
def getChild(self, name):
"""
Look up a child resource.
@return: the child of this resource with the given name.
"""
if name == "":
return self
child = self.putChildren.get(name, None)
if child: return child
child_fp = self.fp.child(name)
if hasattr(self, "knownChildren"):
if name in self.knownChildren:
child_fp.existsCached = True
if child_fp.exists():
return self.createSimilarFile(child_fp)
else:
return None
def listChildren(self):
"""
@return: a sequence of the names of all known children of this resource.
"""
children = self.putChildren.keys()
if self.fp.isdir():
children += [c for c in self.fp.listdir() if c not in children]
self.knownChildren = set(children)
return children
def locateChild(self, req, segments):
"""
See L{IResource}C{.locateChild}.
"""
# If getChild() finds a child resource, return it
child = self.getChild(segments[0])
if child is not None: return (child, segments[1:])
# If we're not backed by a directory, we have no children.
# But check for existance first; we might be a collection resource
# that the request wants created.
self.fp.restat(False)
if self.fp.exists() and not self.fp.isdir(): return (None, ())
# OK, we need to return a child corresponding to the first segment
path = segments[0]
if path:
fpath = self.fp.child(path)
else:
# Request is for a directory (collection) resource
return (self, server.StopTraversal)
# Don't run processors on directories - if someone wants their own
# customized directory rendering, subclass File instead.
if fpath.isfile():
processor = self.processors.get(fpath.splitext()[1].lower())
if processor:
return (processor(fpath.path), segments[1:])
elif not fpath.exists():
sibling_fpath = fpath.siblingExtensionSearch(*self.ignoredExts)
if sibling_fpath is not None:
fpath = sibling_fpath
return self.createSimilarFile(fpath.path), segments[1:]
def renderHTTP(self, req):
self.fp.changed()
return super(File, self).renderHTTP(req)
def render(self, req):
"""You know what you doing."""
if not self.fp.exists():
return responsecode.NOT_FOUND
if self.fp.isdir():
if req.path[-1] != "/":
# Redirect to include trailing '/' in URI
return http.RedirectResponse(
req.unparseURL(path=req.path + '/'))
else:
ifp = self.fp.childSearchPreauth(*self.indexNames)
if ifp:
# Render from the index file
standin = self.createSimilarFile(ifp.path)
else:
# Directory listing is in twistedcaldav.extensions
standin = Data(
"\n".join(["Directory: " + str(req.path), "---"] + [
x.basename() + ("/" if x.isdir() else "")
for x in self.fp.children()
]), "text/plain")
return standin.render(req)
try:
f = self.fp.open()
except IOError, e:
import errno
if e[0] == errno.EACCES:
return responsecode.FORBIDDEN
elif e[0] == errno.ENOENT:
return responsecode.NOT_FOUND
else:
raise
response = http.Response()
response.stream = stream.FileStream(f, 0, self.fp.getsize())
for (header, value) in (
("content-type", self.contentType()),
("content-encoding", self.contentEncoding()),
):
if value is not None:
response.headers.setHeader(header, value)
return response
def makeStream(self, *args, **kw):
return stream.FileStream(self.f, *args, **kw)
