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RangeErrorc B s e Z d Z RS( s6 Error raised when an unsatisfiable range is requested.( t __name__t
__module__t __doc__( ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR s t HTTPRangeHandlerc B s e Z d Z d � Z d � Z RS( s� Handler that enables HTTP Range headers.
This was extremely simple. The Range header is a HTTP feature to
begin with so all this class does is tell urllib2 that the
"206 Partial Content" response from the HTTP server is what we
expected.
Example:
import urllib2
import byterange
range_handler = range.HTTPRangeHandler()
opener = urllib2.build_opener(range_handler)
# install it
urllib2.install_opener(opener)
# create Request and set Range header
req = urllib2.Request('http://www.python.org/')
req.header['Range'] = 'bytes=30-50'
f = urllib2.urlopen(req)
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addinfourlt get_full_urlt codet msg( t selft reqt fpR R t hdrst r( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt http_error_2066 s c C s t d � � d S( Ns Requested Range Not Satisfiable( R ( R
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d � Z RS( s File object wrapper to enable raw range handling.
This was implemented primarily for handling range
specifications for file:// urls. This object effectively makes
a file object look like it consists only of a range of bytes in
the stream.
Examples:
# expose 10 bytes, starting at byte position 20, from
# /etc/aliases.
>>> fo = RangeableFileObject(file('/etc/passwd', 'r'), (20,30))
# seek seeks within the range (to position 23 in this case)
>>> fo.seek(3)
# tell tells where your at _within the range_ (position 3 in
# this case)
>>> fo.tell()
# read EOFs if an attempt is made to read past the last
# byte in the range. the following will return only 7 bytes.
>>> fo.read(30)
c C s> | | _ t | � \ | _ | _ d | _ | j | j � d S( s} Create a RangeableFileObject.
fo -- a file like object. only the read() method need be
supported but supporting an optimized seek() is
preferable.
rangetup -- a (firstbyte,lastbyte) tuple specifying the range
to work over.
The file object provided is assumed to be at byte offset 0.
i N( t fot range_tuple_normalizet firstbytet lastbytet realpost _do_seek( R
R t rangetup( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt __init__V s c C s t | j | � S( s� This effectively allows us to wrap at the instance level.
Any attribute not found in _this_ object will be searched for
in self.fo. This includes methods.( t getattrR ( R
t name( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt __getattr__d s c C s | j | j S( s4 Return the position within the range.
This is different from fo.seek in that position 0 is the
first byte position of the range tuple. For example, if
this object was created with a range tuple of (500,899),
tell() will return 0 when at byte position 500 of the file.
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( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt tellj s i c C s� | d k r | j | } n7 | d k r8 | j | } n | d k rS t d � � n | j rw | | j k rw | j } n | j | | j � d S( se Seek within the byte range.
Positioning is identical to that described under tell().
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realoffset( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt seeks s i����c C s: | j | � } | j j | � } | j t | � 7_ | S( s` Read within the range.
This method will limit the size read based on the range.
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t sizet rslt( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR$ � s c C s: | j | � } | j j | � } | j t | � 7_ | S( sf Read lines within the range.
This method will limit the size read based on the range.
( R# R t readlineR R% ( R
R& R' ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR( � s c C sX | j rT | d k rA | j | | j k rQ | j | j } qQ qT | j | j } n | S( sS Handles calculating the amount of data to read based on
the range.
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R& ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR# � s c C s< t | j d | j � } | | j | � | j | 7_ d S( s� Seek based on whether wrapped object supports seek().
offset is relative to the current position (self.realpos).
R" N( R R t _poor_mans_seekR ( R
R R" ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR � s c C s} d } d } xj | | k rx | | | k r8 | | } n | j j | � } t | � | k rk t d � � n | | 7} q Wd S( s� Seek by calling the wrapped file objects read() method.
This is used for file like objects that do not have native
seek support. The wrapped objects read() method is called
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offset -- read this number of bytes from the wrapped
file object.
raise RangeError if we encounter EOF before reaching the
specified offset.
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( R R R R R R R" R$ R( R# R R) ( ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyR A s t FileRangeHandlerc B s e Z d Z d � Z RS( s~ FileHandler subclass that adds Range support.
This class handles Range headers exactly like an HTTP
server would.
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N( R R RF Rk ( ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyRy H s c C s� | d k r d St d k r: d d l } | j d � a n t j | � } | r� t | j d d � � } | r� | d r� | d | d d f } n | Sd S( s� Get a (firstbyte,lastbyte) tuple from a Range header value.
Range headers have the form "bytes=<firstbyte>-<lastbyte>". This
function pulls the firstbyte and lastbyte values and returns
a (firstbyte,lastbyte) tuple. If lastbyte is not specified in
the header value, it is returned as an empty string in the
tuple.
Return None if range_header is None
Return () if range_header does not conform to the range spec
pattern.
i����Ns ^bytes=(\d{1,})-(\d*)i i i ( ( RF t _rangeret ret compilet matchR t group( t range_headerR� R� t tup( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyRG � s c C sS | d k r d St | � } | rO | d rG | d | d d f } n d | Sd S( s� Convert a range tuple to a Range header value.
Return a string of the form "bytes=<firstbyte>-<lastbyte>" or None
if no range is needed.
i i s bytes=%s-%sN( RF R ( Rv ( ( s9 /usr/lib64/python2.7/site-packages/mercurial/byterange.pyt range_tuple_to_header� s
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rb d } n1 X| d k rx d } n | d k r� t | � } n | | f d k r� d S| | k r� t d | | f � � n | | f S( s6 Normalize a (first_byte,last_byte) range tuple.
Return a tuple whose first element is guaranteed to be an int
and whose second element will be '' (meaning: the last byte) or
an int. Finally, return None if the normalized tuple == (0,'')
as that is equivalent to retrieving the entire file.
i R0 i s Invalid byte range: %s-%sN( NR0 ( i R0 ( RF Rd t
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