Пример #1
0
    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
Пример #2
0
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
Пример #3
0
 def makeStream(self, *args, **kw):
     return stream.FileStream(self.f, *args, **kw)