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.
Method __init__ Create a file with the given path.
Method ignoreExt Ignore the given extension.
Method directoryListing Undocumented
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 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.

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.

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

Create a file with the given path.

ParameterspathThe filename of the file from which this File will serve data. (type: str)
defaultTypeA 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)
ignoredExtsA 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".
registryThe registry object being used to handle this request. If None, one will be created. (type: Registry)
allowExtIgnored 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)
Undocumented
def getChild(self, path, request): (source)

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.

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.

ReturnsA list [(start, stop)] of pairs of length at least one.
RaisesValueErrorif 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.

ParametersstartThe start value from the header, or None if one was not present.
endThe 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.

ParametersoffsetHow far into this resource the range begins.
sizeHow long the range is.
ReturnsThe 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.

ParametersrequestThe Request object.
startAndEndA 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.
ReturnsA 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.

ParametersrequestThe Request object.
byteRangesA list of (start, end) values as specified by the header. For each range, at most one of start and end may be None.
ReturnsSee 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.

ParametersrequestThe twisted.web.http.Request object.
sizeThe 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.

ParametersrequestThe twisted.web.http.Request object.
fileForReadingThe file object containing the resource.
ReturnsA 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)
def listEntities(self): (source)
def createSimilarFile(self, path): (source)
Undocumented
API Documentation for Twisted, generated by pydoctor at 2017-06-11 10:59:01.