twisted.web.static.File : API documentation

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 'http://server/FILE' to a resource created as File('/tmp'), then http://server/FILE/ will return an HTML-formatted listing of the /tmp/ directory, and http://server/FILE/foo/bar.html will return the contents of /tmp/foo/bar.html .

Class Variable	childNotFound	`Resource` used to render 404 Not Found error pages.
Class Variable	forbidden	`Resource` used to render 403 Forbidden error pages.
Instance Variable	contentTypes	a mapping of extensions to MIME types used to set the default value for the Content-Type header. It is initialized with the values returned by `loadMimeTypes`. (type: `dict`)
Instance Variable	contentEncodings	a mapping of extensions to encoding types used to set default value for the Content-Encoding header. (type: `dict`)
Method	__init__	Create a file with the given path.
Method	ignoreExt	Ignore the given extension.
Method	directoryListing	Return a resource that generates an HTML listing of the directory this path represents.
Method	getChild	If this `File`"s path refers to a directory, return a `File` referring to the file named `path` in that directory.
Method	openForReading	Open a file and return it.
Method	getFileSize	Return file size.
Method	makeProducer	Make a `StaticProducer` that will produce the body of this response.
Method	render_GET	Begin sending the contents of this `File` (or a subset of the contents, based on the 'range' header) to the given request.
Method	redirect	Undocumented
Method	listNames	Undocumented
Method	listEntities	Undocumented
Method	createSimilarFile	Undocumented
Method	_parseRangeHeader	Parse the value of a Range header into (start, stop) pairs.
Method	_rangeToOffsetAndSize	Convert a start and end from a Range header to an offset and size.
Method	_contentRange	Return a string suitable for the value of a Content-Range header for a range with the given offset and size.
Method	_doSingleRangeRequest	Set up the response for Range headers that specify a single range.
Method	_doMultipleRangeRequest	Set up the response for Range headers that specify a single range.
Method	_setContentHeaders	Set the Content-length and Content-type headers for this request.

Inherited from Resource:

Method	listStaticNames	Undocumented
Method	listStaticEntities	Undocumented
Method	listDynamicNames	Undocumented
Method	listDynamicEntities	Undocumented
Method	getStaticEntity	Undocumented
Method	getDynamicEntity	Undocumented
Method	delEntity	Undocumented
Method	reallyPutEntity	Undocumented
Method	getChildWithDefault	Retrieve a static or dynamically generated child resource from me.
Method	getChildForRequest	Undocumented
Method	putChild	Register a static child.
Method	render	Render a given resource. See `IResource`'s render method.
Method	render_HEAD	Default handling of HEAD method.

Inherited from FilePath:

Instance Variable	alwaysCreate	When opening this file, only succeed if the file does not already exist. (type: `bool`)
Instance Variable	path	The path from which 'downward' traversal is permitted. (type: `bytes` or `unicode`)
Instance Variable	statinfo 0	(WARNING: statinfo is deprecated as of Twisted 15.0.0 and will become a private attribute) The currently cached status information about the file on the filesystem that this `FilePath` points to. This attribute is `None` if the file is in an indeterminate state (either this `FilePath` has not yet had cause to call `stat()` yet or `FilePath.changed` indicated that new information is required), 0 if `stat()` was called and returned an error (i.e. the path did not exist when `stat()` was called), or a `stat_result` object that describes the last known status of the underlying file (or directory, as the case may be). Trust me when I tell you that you do not want to use this attribute. Instead, use the methods on `FilePath` which give you information about it, like `getsize()`, `isdir()`, `getModificationTime()`, and so on. (type: `int` or `None` or `os.stat_result`)
Method	__getstate__	Support serialization by discarding cached `os.stat` results and returning everything else.
Method	sep	Return a filesystem separator.
Method	asBytesMode	Return this `FilePath` in `bytes`-mode.
Method	asTextMode	Return this `FilePath` in `unicode`-mode.
Method	child	Create and return a new `FilePath` representing a path contained by `self`.
Method	preauthChild	Use me if `path` might have slashes in it, but you know they're safe.
Method	childSearchPreauth	Return my first existing child with a name in `paths`.
Method	siblingExtensionSearch	Attempt to return a path with my name, given multiple possible extensions.
Method	realpath	Returns the absolute target as a `FilePath` if self is a link, self otherwise.
Method	siblingExtension	Attempt to return a path with my name, given the extension at `ext`.
Method	linkTo	Creates a symlink to self to at the path in the `FilePath` `linkFilePath`.
Method	open	Open this file using `mode` or for writing if `alwaysCreate` is `True`.
Method	restat	Re-calculate cached effects of 'stat'. To refresh information on this path after you know the filesystem may have changed, call this method.
Method	changed	Clear any cached information about the state of this path on disk.
Method	chmod	Changes the permissions on self, if possible. Propagates errors from `os.chmod` up.
Method	getsize	Retrieve the size of this file in bytes.
Method	getModificationTime	Retrieve the time of last access from this file.
Method	getStatusChangeTime	Retrieve the time of the last status change for this file.
Method	getAccessTime	Retrieve the time that this file was last accessed.
Method	getInodeNumber	Retrieve the file serial number, also called inode number, which distinguishes this file from all other files on the same device.
Method	getDevice	Retrieves the device containing the file. The inode number and device number together uniquely identify the file, but the device number is not necessarily consistent across reboots or system crashes.
Method	getNumberOfHardLinks	Retrieves the number of hard links to the file.
Method	getUserID	Returns the user ID of the file's owner.
Method	getGroupID	Returns the group ID of the file.
Method	getPermissions	Returns the permissions of the file. Should also work on Windows, however, those permissions may not be what is expected in Windows.
Method	exists	Check if this `FilePath` exists.
Method	isdir	Check if this `FilePath` refers to a directory.
Method	isfile	Check if this file path refers to a regular file.
Method	isBlockDevice	Returns whether the underlying path is a block device.
Method	isSocket	Returns whether the underlying path is a socket.
Method	islink	Check if this `FilePath` points to a symbolic link.
Method	isabs	Check if this `FilePath` refers to an absolute path.
Method	listdir	List the base names of the direct children of this `FilePath`.
Method	splitext	Split the file path into a pair `(root, ext)` such that `root + ext == path`.
Method	__repr__	Undocumented
Method	touch	Updates the access and last modification times of the file at this file path to the current time. Also creates the file if it does not already exist.
Method	remove	Removes the file or directory that is represented by self. If `self.path` is a directory, recursively remove all its children before removing the directory. If it's a file or link, just delete it.
Method	makedirs	Create all directories not yet existing in `path` segments, using `os.makedirs`.
Method	globChildren	Assuming I am representing a directory, return a list of FilePaths representing my children that match the given pattern.
Method	basename	Retrieve the final component of the file path's path (everything after the final path separator).
Method	dirname	Retrieve all of the components of the `FilePath`'s path except the last one (everything up to the final path separator).
Method	parent	A file path for the directory containing the file at this file path.
Method	setContent	Replace the file at this path with a new file that contains the given bytes, trying to avoid data-loss in the meanwhile.
Method	__cmp__	Undocumented
Method	createDirectory	Create the directory the `FilePath` refers to.
Method	requireCreate	Sets the `alwaysCreate` variable.
Method	create	Exclusively create a file, only if this file previously did not exist.
Method	temporarySibling	Construct a path referring to a sibling of this path.
Method	copyTo	Copies self to destination.
Method	moveTo	Move self to destination - basically renaming self to whatever destination is named.
Method	statinfo	FilePath.statinfo is deprecated.
Method	_asBytesPath	Return the path of this `FilePath` as bytes.
Method	_asTextPath	Return the path of this `FilePath` as text.
Method	_getPathAsSameTypeAs	If `pattern` is `bytes`, return `FilePath.path` as `bytes`. Otherwise, return `FilePath.path` as `unicode`.

Inherited from AbstractFilePath (via FilePath):

Method	getContent	Retrieve the contents of the file at this path.
Method	parents	Retrieve an iterator of all the ancestors of this path.
Method	children	List the children of this path object.
Method	walk	Yield myself, then each of my children, and each of those children's children in turn.
Method	sibling	Return a `FilePath` with the same directory as this instance but with a basename of `path`.
Method	descendant	Retrieve a child or child's child of this path.
Method	segmentsFrom	Return a list of segments between a child and its ancestor.
Method	__hash__	Hash the same as another `FilePath` with the same path as mine.
Method	getmtime	Deprecated. Use getModificationTime instead.
Method	getatime	Deprecated. Use getAccessTime instead.
Method	getctime	Deprecated. Use getStatusChangeTime instead.

childNotFound =

Resource used to render 404 Not Found error pages.

forbidden =

Resource used to render 403 Forbidden error pages.

contentTypes =

a mapping of extensions to MIME types used to set the default value for the Content-Type header. It is initialized with the values returned by loadMimeTypes. (type: dict)

contentEncodings =

a mapping of extensions to encoding types used to set default value for the Content-Encoding header. (type: dict)

def __init__(self, path, defaultType='text/html', ignoredExts=(), registry=None, allowExt=0): (source)

overrides twisted.web.resource.Resource.__init__

Create a file with the given path.

Parameters	path	The filename of the file from which this `File` will serve data. (type: `str`)
	defaultType	A major/minor-style MIME type specifier indicating the Content-Type with which this `File`'s data will be served if a MIME type cannot be determined based on `path`'s extension. (type: `str`)
	ignoredExts	A sequence giving the extensions of paths in the filesystem which will be ignored for the purposes of child lookup. For example, if `ignoredExts` is `(".bar",)` and `path` is a directory containing a file named `"foo.bar"`, a request for the `"foo"` child of this resource will succeed with a `File` pointing to `"foo.bar"`.
	registry	The registry object being used to handle this request. If `None`, one will be created. (type: `Registry`)
	allowExt	Ignored parameter, only present for backwards compatibility. Do not pass a value for this parameter.

def ignoreExt(self, ext): (source)

Ignore the given extension.

Serve file.ext if file is requested

def directoryListing(self): (source)

Return a resource that generates an HTML listing of the directory this path represents.

Returns A resource that renders the directory to HTML. (type: DirectoryLister)

def getChild(self, path, request): (source)

overrides twisted.web.resource.Resource.getChild

If this File"s path refers to a directory, return a File referring to the file named path in that directory.

If path is the empty string, return a DirectoryLister instead.

Parameters	path	The current path segment. (type: `bytes`)
	request	The incoming request. (type: An that provides `twisted.web.iweb.IRequest`.)
Returns	A resource representing the requested file or directory, or `NoResource` if the path cannot be accessed. (type: An object that provides `resource.IResource`.)

def openForReading(self): (source)

Open a file and return it.

def getFileSize(self): (source)

Return file size.

def _parseRangeHeader(self, range): (source)

Parse the value of a Range header into (start, stop) pairs.

In a given pair, either of start or stop can be None, signifying that no value was provided, but not both.

Returns	A list `[(start, stop)]` of pairs of length at least one.
Raises	ValueError	if the header is syntactically invalid or if the Bytes-Unit is anything other than "bytes'.

def _rangeToOffsetAndSize(self, start, end): (source)

Convert a start and end from a Range header to an offset and size.

This method checks that the resulting range overlaps with the resource being served (and so has the value of getFileSize() as an indirect input).

Either but not both of start or end can be None:

Omitted start means that the end value is actually a start value relative to the end of the resource.
Omitted end means the end of the resource should be the end of the range.

End is interpreted as inclusive, as per RFC 2616.

If this range doesn't overlap with any of this resource, (0, 0) is returned, which is not otherwise a value return value.

Parameters	start	The start value from the header, or `None` if one was not present.
	end	The end value from the header, or `None` if one was not present.
Returns	`(offset, size)` where offset is how far into this resource this resource the range begins and size is how long the range is, or `(0, 0)` if the range does not overlap this resource.

def _contentRange(self, offset, size): (source)

Return a string suitable for the value of a Content-Range header for a range with the given offset and size.

The offset and size are not sanity checked in any way.

Parameters	offset	How far into this resource the range begins.
	size	How long the range is.
Returns	The value as appropriate for the value of a Content-Range header.

def _doSingleRangeRequest(self, request, startAndEnd): (source)

Set up the response for Range headers that specify a single range.

This method checks if the request is satisfiable and sets the response code and Content-Range header appropriately. The return value indicates which part of the resource to return.

Parameters	request	The Request object.
	startAndEnd	A 2-tuple of start of the byte range as specified by the header and the end of the byte range as specified by the header. At most one of the start and end may be `None`.
Returns	A 2-tuple of the offset and size of the range to return. offset == size == 0 indicates that the request is not satisfiable.

def _doMultipleRangeRequest(self, request, byteRanges): (source)

Set up the response for Range headers that specify a single range.

This method checks if the request is satisfiable and sets the response code and Content-Type and Content-Length headers appropriately. The return value, which is a little complicated, indicates which parts of the resource to return and the boundaries that should separate the parts.

In detail, the return value is a tuple rangeInfo rangeInfo is a list of 3-tuples (partSeparator, partOffset, partSize). The response to this request should be, for each element of rangeInfo, partSeparator followed by partSize bytes of the resource starting at partOffset. Each partSeparator includes the MIME-style boundary and the part-specific Content-type and Content-range headers. It is convenient to return the separator as a concrete string from this method, because this method needs to compute the number of bytes that will make up the response to be able to set the Content-Length header of the response accurately.

Parameters	request	The Request object.
	byteRanges	A list of `(start, end)` values as specified by the header. For each range, at most one of `start` and `end` may be `None`.
Returns	See above.

def _setContentHeaders(self, request, size=None): (source)

Set the Content-length and Content-type headers for this request.

This method is not appropriate for requests for multiple byte ranges; _doMultipleRangeRequest will set these headers in that case.

Parameters	request	The `twisted.web.http.Request` object.
	size	The size of the response. If not specified, default to `self.getFileSize()`.

def makeProducer(self, request, fileForReading): (source)

Make a StaticProducer that will produce the body of this response.

This method will also set the response code and Content-* headers.

Parameters	request	The `twisted.web.http.Request` object.
	fileForReading	The file object containing the resource.
Returns	A `StaticProducer`. Calling `.start()` on this will begin producing the response.

def render_GET(self, request): (source)

Begin sending the contents of this File (or a subset of the contents, based on the 'range' header) to the given request.

def redirect(self, request): (source)

Undocumented

def listNames(self): (source)

overrides twisted.web.resource.Resource.listNames

Undocumented

def listEntities(self): (source)

overrides twisted.web.resource.Resource.listEntities

Undocumented

def createSimilarFile(self, path): (source)

Undocumented

API Documentation for Twisted, generated by pydoctor at 2018-10-15 19:29:43.

twisted.web.static.File(resource.Resource, filepath.FilePath) class documentation

`twisted.web.static.File(resource.Resource, filepath.FilePath)` class documentation