def decode(self, fd=sys.stdin):
# The octet-stream data are passed right back
if self.type == "application/octet-stream":
return InputStream(fd, self.length, self.name, close=fd.close)
if not self.io:
self.read(fd)
# At this point self.io exists (the only case when self.read() does
# not initialize self.io is when content-type is
# "application/octet-stream" - and we already dealt with that case
# We can now close the file descriptor
if hasattr(fd, "close"):
fd.close()
# Now we have the binary goo
if not self.encoding or self.encoding == "__plain":
# all is fine.
pass
elif self.encoding in ("x-zlib", "deflate"):
import zlib
obj = zlib.decompressobj()
self.io.seek(0, 0)
data = obj.decompress(self.io.read()) + obj.flush()
del obj
self.length = len(data)
self.io = SmartIO(max_mem_size=self.max_mem_size)
self.io.write(data)
elif self.encoding in ("x-gzip", "gzip"):
import gzip
self.io.seek(0, 0)
gz = gzip.GzipFile(mode="rb",
compresslevel=COMPRESS_LEVEL,
fileobj=self.io)
data = gz.read()
self.length = len(data)
self.io = SmartIO(max_mem_size=self.max_mem_size)
self.io.write(data)
elif self.encoding == "x-gpg":
# XXX: should be written
raise NotImplementedError(self.transfer, self.encoding)
else:
raise NotImplementedError(self.transfer, self.encoding)
# Play nicely and rewind the file descriptor
self.io.seek(0, 0)
return self.io
def read(self, fd=sys.stdin):
# The octet-streams are passed right back
if self.type == "application/octet-stream":
return
if self.length:
# Read exactly the amount of data we were told
self.io = _smart_read(fd,
self.length,
bufferSize=self.bufferSize,
progressCallback=self.progressCallback,
max_mem_size=self.max_mem_size)
else:
# Oh well, no clue; read until EOF (hopefully)
self.io = _smart_total_read(fd)
if not self.transfer or self.transfer == "binary":
return
elif self.transfer == "base64":
import base64
old_io = self.io
old_io.seek(0, 0)
self.io = SmartIO(max_mem_size=self.max_mem_size)
base64.decode(old_io, self.io)
else:
raise NotImplementedError(self.transfer)
def __init__(self, req):
""" init with http request object """
# FIXME: should rename some things:
# self.bodyFd --> self.body or self.data or ?
# self.caChain --> self.caCert
self.req = req
# turn wsgi.input object into a SmartIO instance so it can be read
# more than once
if 'wsgi.input' in self.req.headers_in:
smartFd = SmartIO(max_mem_size=CFG.MAX_MEM_FILE_SIZE)
smartFd.write(self.req.headers_in['wsgi.input'].read())
self.req.headers_in['wsgi.input'] = smartFd
self.responseContext = ResponseContext()
self.uri = None # ''
# Common settings for both the proxy and the redirect
# broker and redirect immediately alter these for their own purposes
self.caChain = CFG.CA_CHAIN
self.httpProxy = CFG.HTTP_PROXY
self.httpProxyUsername = CFG.HTTP_PROXY_USERNAME
self.httpProxyPassword = CFG.HTTP_PROXY_PASSWORD
if not self.httpProxyUsername:
self.httpProxyPassword = ''
self.rhnParent = CFG.RHN_PARENT or ''
self.rhnParent = rhnLib.parseUrl(self.rhnParent)[1].split(':')[0]
CFG.set('RHN_PARENT', self.rhnParent)
def _forwardHTTPBody(self, fromResponse, toRequest):
""" This routine will transfer the body of an HTTP response to the output
area of an HTTP request for response to the original requesting client.
The request's send_http_header function must be called before this
function is called.
"""
if fromResponse is None or toRequest is None:
return
# Get the size of the body
size = self._determineHTTPBodySize(fromResponse.msg)
log_debug(4, "Response body size: ", size)
# Now fill in the bytes if need be.
# read content if there is some or the size is unknown
if (size > 0 or size == -1) and (toRequest.method != 'HEAD'):
tfile = SmartIO(max_mem_size=CFG.MAX_MEM_FILE_SIZE)
buf = fromResponse.read(CFG.BUFFER_SIZE)
while buf:
try:
tfile.write(buf)
buf = fromResponse.read(CFG.BUFFER_SIZE)
except IOError:
buf = 0
tfile.seek(0)
if 'wsgi.file_wrapper' in toRequest.headers_in:
toRequest.output = toRequest.headers_in['wsgi.file_wrapper'](tfile, CFG.BUFFER_SIZE)
else:
toRequest.output = iter(lambda: tfile.read(CFG.BUFFER_SIZE), '')
def _smart_read(fd, amt, bufferSize=1024, progressCallback=None,
max_mem_size=16384):
# Reads amt bytes from fd, or until the end of file, whichever
# occurs first
# The function will read in memory if the amout to be read is smaller than
# max_mem_size, or to a temporary file otherwise
#
# Unlike read(), _smart_read tries to return exactly the requested amount
# (whereas read will return _up_to_ that amount). Reads from sockets will
# usually reaturn less data, or the read can be interrupted
#
# Inspired by Greg Stein's httplib.py (the standard in python 2.x)
#
# support for progress callbacks added
startTime = time.time()
lastTime = startTime
buf = SmartIO(max_mem_size=max_mem_size)
origsize = amt
while amt > 0:
curTime = time.time()
l = min(bufferSize, amt)
chunk = fd.read(l)
# read guarantees that len(chunk) <= l
l = len(chunk)
if not l:
# Oops. Most likely EOF
break
# And since the original l was smaller than amt, we know amt >= 0
amt = amt - l
buf.write(chunk)
if progressCallback is None:
# No progress callback, so don't do fancy computations
continue
# We update the progress callback if:
# we haven't updated it for more than a secord, or
# it's the last read (amt == 0)
if curTime - lastTime >= 1 or amt == 0:
lastTime = curTime
# use float() so that we force float division in the next step
bytesRead = float(origsize - amt)
# if amt == 0, on a fast machine it is possible to have
# curTime - lastTime == 0, so add an epsilon to prevent a division
# by zero
speed = bytesRead / ((curTime - startTime) + .000001)
if origsize == 0:
secs = 0
else:
# speed != 0 because bytesRead > 0
# (if bytesRead == 0 then origsize == amt, which means a read
# of 0 length; but that's impossible since we already checked
# that l is non-null
secs = amt / speed
progressCallback(bytesRead, origsize, speed, secs)
# Now rewind the SmartIO
buf.seek(0, 0)
return buf
def process(self, data):
# Assume straight text/xml
self.data = data
# Content-Encoding header
if self.encoding == self.ENCODE_GZIP:
import gzip
encoding_name = self.encodings[self.ENCODE_GZIP][0]
self.set_header("Content-Encoding", encoding_name)
f = SmartIO(force_mem=1)
gz = gzip.GzipFile(mode="wb",
compresslevel=COMPRESS_LEVEL,
fileobj=f)
if sys.version_info[0] == 3:
gz.write(bstr(data))
else:
gz.write(sstr(data))
gz.close()
self.data = f.getvalue()
f.close()
elif self.encoding == self.ENCODE_ZLIB:
import zlib
encoding_name = self.encodings[self.ENCODE_ZLIB][0]
self.set_header("Content-Encoding", encoding_name)
obj = zlib.compressobj(COMPRESS_LEVEL)
self.data = obj.compress(data) + obj.flush()
elif self.encoding == self.ENCODE_GPG:
# XXX: fix me.
raise NotImplementedError(self.transfer, self.encoding)
encoding_name = self.encodings[self.ENCODE_GPG][0]
self.set_header("Content-Encoding", encoding_name)
# Content-Transfer-Encoding header
if self.transfer == self.TRANSFER_BINARY:
transfer_name = self.transfers[self.TRANSFER_BINARY]
self.set_header("Content-Transfer-Encoding", transfer_name)
self.set_header("Content-Type", "application/binary")
elif self.transfer == self.TRANSFER_BASE64:
import base64
transfer_name = self.transfers[self.TRANSFER_BASE64]
self.set_header("Content-Transfer-Encoding", transfer_name)
self.set_header("Content-Type", "text/base64")
self.data = base64.encodestring(self.data)
self.set_header("Content-Length", len(self.data))
rpc_version = __version__
if len(__version__.split()) > 1:
rpc_version = __version__.split()[1]
# other headers
self.set_header(
"X-Transport-Info",
'Extended Capabilities Transport (C) Red Hat, Inc (version %s)' %
rpc_version)
self.__processed = 1
def _smart_total_read(fd, bufferSize=1024, max_mem_size=16384):
"""
Tries to read data from the supplied stream, and puts the results into a
StmartIO object. The data will be in memory or in a temporary file,
depending on how much it's been read
Returns a SmartIO object
"""
io = SmartIO(max_mem_size=max_mem_size)
while 1:
chunk = fd.read(bufferSize)
if not chunk:
# EOF reached
break
io.write(chunk)
return io
#!/usr/bin/python
#
# Test for SmartIO objects
#
import sys
sys.path.append('..')
from rhn.SmartIO import SmartIO
from cStringIO import OutputType
if __name__ == '__main__':
s = SmartIO(max_mem_size=16384)
for i in range(20):
s.write(("%d" % (i % 10)) * 1023 + '\n')
if i < 16:
assert (isinstance(s._io, OutputType))
else:
assert (not isinstance(s._io, OutputType))
print i, type(s._io), s._io.tell()