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# ``twisted`.`web`.`static`.`File``

class documentation

`class File(resource.Resource, filepath.FilePath): (source)`

View In Hierarchy

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 .

Method | `__init__` | Create a file with the given path.
Method | `createSimilarFile` | Undocumented
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 | `getFileSize` | Return file size.
Method | `ignoreExt` | Ignore the given extension.
Method | `listEntities` | Undocumented
Method | `listNames` | Undocumented
Method | `makeProducer` | Make a `StaticProducer` that will produce the body of this response.
Method | `openForReading` | Open a file and return it.
Method | `redirect` | Undocumented
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.
Class Variable | `childNotFound` | `Resource` used to render 404 Not Found error pages.
Class Variable | `forbidden` | `Resource` used to render 403 Forbidden error pages.
Class Variable | `indexNames` | Undocumented
Class Variable | `processors` | Undocumented
Instance Variable | `contentEncodings` | a mapping of extensions to encoding types used to set default value for the Content-Encoding header.
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`.
Instance Variable | `defaultType` | Undocumented
Instance Variable | `encoding` | Undocumented
Instance Variable | `ignoredExts` | Undocumented
Instance Variable | `registry` | Undocumented
Instance Variable | `type` | Undocumented
Method | `_contentRange` | Return a string suitable for the value of a Content-Range header for a range with the given offset and size.
Method | `_doMultipleRangeRequest` | Set up the response for Range headers that specify a single range.
Method | `_doSingleRangeRequest` | Set up the response for Range headers that specify a single range.
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 | `_setContentHeaders` | Set the Content-length and Content-type headers for this request.

Inherited from `Resource`:

Method | `delEntity` | Undocumented
Method | `getChildForRequest` | Undocumented
Method | `getChildWithDefault` | Retrieve a static or dynamically generated child resource from me.
Method | `getDynamicEntity` | Undocumented
Method | `getStaticEntity` | Undocumented
Method | `listDynamicEntities` | Undocumented
Method | `listDynamicNames` | Undocumented
Method | `listStaticEntities` | Undocumented
Method | `listStaticNames` | Undocumented
Method | `putChild` | Register a static child.
Method | `reallyPutEntity` | Undocumented
Method | `render` | Render a given resource. See `IResource`'s render method.
Method | `render_HEAD` | Default handling of HEAD method.
Class Variable | `isLeaf` | Signal if this IResource implementor is a "leaf node" or not. If True, getChildWithDefault will not be called on this Resource.
Class Variable | `server` | Undocumented
Instance Variable | `children` | Undocumented

Inherited from `FilePath` (via `Resource`):

Method | `__cmp__` | Undocumented
Method | `__getstate__` | Support serialization by discarding cached `os.stat` results and returning everything else.
Method | `__repr__` | Undocumented
Method | `asBytesMode` | Return this `FilePath` in `bytes`-mode.
Method | `asTextMode` | Return this `FilePath` in `unicode`-mode.
Method | `basename` | Retrieve the final component of the file path's path (everything after the final path separator).
Method | `changed` | Clear any cached information about the state of this path on disk.
Method | `child` | Create and return a new `FilePath` representing a path contained by `self`.
Method | `childSearchPreauth` | Return my first existing child with a name in `paths`.
Method | `chmod` | Changes the permissions on self, if possible. Propagates errors from `os.chmod` up.
Method | `copyTo` | Copies self to destination.
Method | `create` | Exclusively create a file, only if this file previously did not exist.
Method | `createDirectory` | Create the directory the `FilePath` refers to.
Method | `dirname` | Retrieve all of the components of the `FilePath`'s path except the last one (everything up to the final path separator).
Method | `exists` | Check if this `FilePath` exists.
Method | `getAccessTime` | Retrieve the time that this file was last accessed.
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 | `getGroupID` | Returns the group ID of the file.
Method | `getInodeNumber` | Retrieve the file serial number, also called inode number, which distinguishes this file from all other files on the same device.
Method | `getModificationTime` | Retrieve the time of last access from this file.
Method | `getNumberOfHardLinks` | Retrieves the number of hard links to 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 | `getsize` | Retrieve the size of this file in bytes.
Method | `getStatusChangeTime` | Retrieve the time of the last status change for this file.
Method | `getUserID` | Returns the user ID of the file's owner.
Method | `globChildren` | Assuming I am representing a directory, return a list of FilePaths representing my children that match the given pattern.
Method | `isabs` | Check if this `FilePath` refers to an absolute path.
Method | `isBlockDevice` | Returns whether the underlying path is a block device.
Method | `isdir` | Check if this `FilePath` refers to a directory.
Method | `isfile` | Check if this file path refers to a regular file.
Method | `islink` | Check if this `FilePath` points to a symbolic link.
Method | `isSocket` | Returns whether the underlying path is a socket.
Method | `linkTo` | Creates a symlink to self to at the path in the `FilePath` `linkFilePath`.
Method | `listdir` | List the base names of the direct children of this `FilePath`.
Method | `makedirs` | Create all directories not yet existing in `path` segments, using `os.makedirs`.
Method | `moveTo` | Move self to destination - basically renaming self to whatever destination is named.
Method | `open` | Open this file using `mode` or for writing if `alwaysCreate` is `True`.
Method | `parent` | A file path for the directory containing the file at this file path.
Method | `preauthChild` | Use me if `path` might have slashes in it, but you know they're safe.
Method | `realpath` | Returns the absolute target as a `FilePath` if self is a link, self otherwise.
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 | `requireCreate` | Sets the `alwaysCreate` variable.
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 | `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 | `siblingExtension` | Attempt to return a path with my name, given the extension at `ext`.
Method | `siblingExtensionSearch` | Attempt to return a path with my name, given multiple possible extensions.
Method | `splitext` | Split the file path into a pair `(root, ext)` such that `root + ext == path`.
Method | `temporarySibling` | Construct a path referring to a sibling of this path.
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.
Instance Variable | `alwaysCreate` | When opening this file, only succeed if the file does not already exist.
Instance Variable | `path` | The path from which 'downward' traversal is permitted.
Property | `sep` | Return a filesystem separator.
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`.
Class Variable | `_chunkSize` | Undocumented
Instance Variable | `_statinfo` | Undocumented

Inherited from `AbstractFilePath` (via `Resource`, `FilePath`):

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

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:`str` | The filename of the file from which this `File` will serve data.
defaultType:`str` | 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.
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:`Registry` | The registry object being used to handle this request. If `None`, one will be created.
allowExt | Ignored parameter, only present for backwards compatibility. Do not pass a value for this parameter.

def createSimilarFile(self, path): (source)

Undocumented

def directoryListing(self): (source)

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

Returns
`DirectoryLister` | A resource that renders the directory to HTML.

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

def getFileSize(self): (source)

Return file size.

def ignoreExt(self, ext): (source)

Ignore the given extension.

Serve file.ext if file is requested

def listEntities(self): (source)
overrides `twisted.web.resource.Resource.listEntities`

Undocumented

def listNames(self): (source)
overrides `twisted.web.resource.Resource.listNames`

Undocumented

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 openForReading(self): (source)

Open a file and return it.

def redirect(self, request): (source)

Undocumented

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.

childNotFound = (source)

`Resource` used to render 404 Not Found error pages.

forbidden = (source)

`Resource` used to render 403 Forbidden error pages.

indexNames: `list[str]` = (source)

Undocumented

processors: `Dict[str, Callable[[str, Any], Data]]` = (source)

Undocumented

contentEncodings: `dict` = (source)

a mapping of extensions to encoding types used to set default value for the Content-Encoding header.

contentTypes: `dict` = (source)

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`.

defaultType = (source)

Undocumented

encoding = (source)

Undocumented

ignoredExts: `list[str]` = (source)

Undocumented

registry = (source)

Undocumented

type = (source)

Undocumented

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 _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 _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 _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 _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()`.