def parse_trailers(self, unreader, data):
buf = BufferIO()
buf.write(data)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
while idx < 0 and not done:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
if done:
unreader.unread(buf.getvalue()[2:])
return ""
self.req.trailers = self.req.parse_headers(buf.getvalue()[:idx])
if self.trailer_handler is not None:
self.trailer_handler(self.req.trailers)
unreader.unread(buf.getvalue()[idx+4:])
def parse_chunk_size(self, unreader, data=None):
buf = BufferIO()
if data is not None:
buf.write(data)
idx = buf.getvalue().find("\r\n")
while idx < 0:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n")
data = buf.getvalue()
line, rest_chunk = data[:idx], data[idx + 2:]
chunk_size = line.split(";", 1)[0].strip()
try:
chunk_size = int(chunk_size, 16)
except ValueError:
raise ParseError("Invalid chunk size: %r" % chunk_size)
if chunk_size == 0:
try:
self.parse_trailers(unreader, rest_chunk)
except NoMoreData:
pass
return (0, None)
return (chunk_size, rest_chunk)
def parse_chunk_size(self, unreader, data=None):
buf = BufferIO()
if data is not None:
buf.write(data)
idx = buf.getvalue().find("\r\n")
while idx < 0:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n")
data = buf.getvalue()
line, rest_chunk = data[:idx], data[idx+2:]
chunk_size = line.split(";", 1)[0].strip()
try:
chunk_size = int(chunk_size, 16)
except ValueError:
raise ParseError("Invalid chunk size: %r" % chunk_size)
if chunk_size == 0:
try:
self.parse_trailers(unreader, rest_chunk)
except NoMoreData:
pass
return (0, None)
return (chunk_size, rest_chunk)
def read(self, size):
if not isinstance(size, (int, long)):
raise TypeError("size must be an integral type")
size = min(self.length, size)
if size < 0:
raise ValueError("Size must be positive.")
if size == 0:
return ""
buf = BufferIO()
data = self.unreader.read()
while data:
buf.write(data)
if buf.tell() >= size:
break
data = self.unreader.read()
buf = buf.getvalue()
ret, rest = buf[:size], buf[size:]
self.unreader.unread(rest)
self.length -= size
return ret
def read(self, size):
if not isinstance(size, (int, long)):
raise TypeError("size must be an integral type")
size = min(self.length, size)
if size < 0:
raise ValueError("Size must be positive.")
if size == 0:
return ""
buf = BufferIO()
data = self.unreader.read()
while data:
buf.write(data)
if buf.tell() >= size:
break
data = self.unreader.read()
buf = buf.getvalue()
ret, rest = buf[:size], buf[size:]
self.unreader.unread(rest)
self.length -= size
return ret
class Unreader(object):
"""\
An Unreader is an object that can have previously read
bytes pushed back into it to be re-read. This helps so
that we don't have to read bytes one at a time.
"""
def __init__(self, sock, max_chunk=8192):
self.sock = sock
self.max_chunk = max_chunk
self.buf = BufferIO()
def _data(self):
return self.sock.recv(self.max_chunk)
def unread(self, data):
self.buf.seek(0, os.SEEK_END)
self.buf.write(data)
def read(self, size=None):
if size is not None and not isinstance(size, (int, long)):
raise TypeError("size parameter must be an int or long.")
if size == 0:
return ""
if size is None or size < 0:
size = None
self.buf.seek(0, os.SEEK_END)
if size is None and self.buf.tell():
ret = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
return ret
if size is None:
return self._data()
while self.buf.tell() < size:
data = self._data()
if not len(data):
ret = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
return ret
self.buf.write(data)
data = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(data[size:])
return data[:size]
def __init__(self, sock, max_chunk=8192):
self.sock = sock
self.max_chunk = max_chunk
self.buf = BufferIO()
class Body(object):
"""\
This class implements the necessary methods specified by
WSGI v1.0.
"""
def __init__(self, reader):
self.reader = reader
self.buf = BufferIO()
self.pre_read = None
def set_pre_read(self, func):
if not callable(func):
raise TypeError("func must be callable.")
self.pre_read = func
def set_trailers_handler(self, func):
self.reader.set_trailers_handler(func)
def __iter__(self):
return self
def next(self):
ret = self.readline()
if not ret:
raise StopIteration()
return ret
def discard(self):
"""\
If processing a request failed to read all the available
body data we need to discard anything before processing
the nest request.
"""
data = self.read(8192)
while data:
data = self.read(8192)
def read(self, size=None):
size = self._get_size(size)
if size == 0:
return ""
if size < self.buf.tell():
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
while size > self.buf.tell():
data = self._get_data()
if not len(data):
break
self.buf.write(data)
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def readline(self, size=None):
size = self._get_size(size)
if size == 0:
return ""
idx = self.buf.getvalue().find("\n")
while idx < 0:
data = self._get_data(1024)
if not len(data):
break
self.buf.write(data)
idx = self.buf.getvalue().find("\n")
if size < self.buf.tell():
break
# If we didn't find it, and we got here, we've
# exceeded size or run out of data.
if idx < 0:
rlen = min(size, self.buf.tell())
else:
rlen = idx + 1
# If rlen is beyond our size threshold, trim back
if rlen > size:
rlen = size
data = self.buf.getvalue()
ret, rest = data[:rlen], data[rlen:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def readlines(self, size=None):
ret = []
data = self.read()
while len(data):
pos = data.find("\n")
if pos < 0:
ret.append(data)
data = ""
else:
line, data = data[:pos + 1], data[pos + 1:]
ret.append(line)
return ret
def _get_size(self, size):
"""\
Correct a size hint passed in to a read request. This
attempts to mimic the behaviour of a file object.
"""
if size is None:
return sys.maxint
elif not isinstance(size, (int, long)):
raise TypeError("Size must be an integral type")
elif size < 0:
return sys.maxint
return size
def _get_data(self):
if self.pre_read is not None:
self.pre_read()
self.pre_read = None
return self.reader.read(1024)
def __init__(self, reader):
self.reader = reader
self.buf = BufferIO()
self.pre_read = None
def parse_trailers(self, unreader, data):
buf = BufferIO()
buf.write(data)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
while idx < 0 and not done:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
if done:
unreader.unread(buf.getvalue()[2:])
return ""
self.req.trailers = self.req.parse_headers(buf.getvalue()[:idx])
if self.trailer_handler is not None:
self.trailer_handler(self.req.trailers)
unreader.unread(buf.getvalue()[idx + 4:])
class Body(object):
"""\
This class implements the necessary methods specified by
WSGI v1.0.
"""
def __init__(self, reader):
self.reader = reader
self.buf = BufferIO()
self.pre_read = None
def set_pre_read(self, func):
if not callable(func):
raise TypeError("func must be callable.")
self.pre_read = func
def set_trailers_handler(self, func):
self.reader.set_trailers_handler(func)
def __iter__(self):
return self
def next(self):
ret = self.readline()
if not ret:
raise StopIteration()
return ret
def discard(self):
"""\
If processing a request failed to read all the available
body data we need to discard anything before processing
the nest request.
"""
data = self.read(8192)
while data:
data = self.read(8192)
def read(self, size=None):
size = self._get_size(size)
if size == 0:
return ""
if size < self.buf.tell():
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
while size > self.buf.tell():
data = self._get_data()
if not len(data):
break
self.buf.write(data)
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def readline(self, size=None):
size = self._get_size(size)
if size == 0:
return ""
idx = self.buf.getvalue().find("\n")
while idx < 0:
data = self._get_data(1024)
if not len(data):
break
self.buf.write(data)
idx = self.buf.getvalue().find("\n")
if size < self.buf.tell():
break
# If we didn't find it, and we got here, we've
# exceeded size or run out of data.
if idx < 0:
rlen = min(size, self.buf.tell())
else:
rlen = idx + 1
# If rlen is beyond our size threshold, trim back
if rlen > size:
rlen = size
data = self.buf.getvalue()
ret, rest = data[:rlen], data[rlen:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def readlines(self, size=None):
ret = []
data = self.read()
while len(data):
pos = data.find("\n")
if pos < 0:
ret.append(data)
data = ""
else:
line, data = data[:pos+1], data[pos+1:]
ret.append(line)
return ret
def _get_size(self, size):
"""\
Correct a size hint passed in to a read request. This
attempts to mimic the behaviour of a file object.
"""
if size is None:
return sys.maxint
elif not isinstance(size, (int, long)):
raise TypeError("Size must be an integral type")
elif size < 0:
return sys.maxint
return size
def _get_data(self):
if self.pre_read is not None:
self.pre_read()
self.pre_read = None
return self.reader.read(1024)
def __init__(self, unreader, req):
self.parser = self.parse_chunked(unreader)
self.req = req
self.buf = BufferIO()
self.trailer_handler = None
def __init__(self, unreader, req):
self.parser = self.parse_chunked(unreader)
self.req = req
self.buf = BufferIO()
self.trailer_handler = None
def parse(self, unreader):
buf = BufferIO()
self._get_data(unreader, buf, stop=True)
# Request line
idx = buf.getvalue().find(b("\r\n"))
while idx < 0:
self._get_data(unreader, buf)
idx = buf.getvalue().find(b("\r\n"))
self.parse_request_line(buf.getvalue()[:idx])
rest = buf.getvalue()[idx + 2:] # Skip \r\n
buf.truncate(0)
buf.seek(0)
buf.write(rest)
# Headers
idx = buf.getvalue().find(b("\r\n\r\n"))
done = buf.getvalue()[:2] == b("\r\n")
while idx < 0 and not done:
self._get_data(unreader, buf)
idx = buf.getvalue().find(b("\r\n\r\n"))
done = buf.getvalue()[:2] == b("\r\n")
if done:
self.unreader.unread(buf.getvalue()[2:])
return b("")
self.headers = self.parse_headers(buf.getvalue()[:idx])
ret = buf.getvalue()[idx + 4:]
buf.truncate(0)
buf.seek(0)
return ret
def parse(self, unreader):
buf = BufferIO()
self._get_data(unreader, buf, stop=True)
# Request line
idx = buf.getvalue().find(b("\r\n"))
while idx < 0:
self._get_data(unreader, buf)
idx = buf.getvalue().find(b("\r\n"))
self.parse_request_line(buf.getvalue()[:idx])
rest = buf.getvalue()[idx+2:] # Skip \r\n
buf.truncate(0)
buf.seek(0)
buf.write(rest)
# Headers
idx = buf.getvalue().find(b("\r\n\r\n"))
done = buf.getvalue()[:2] == b("\r\n")
while idx < 0 and not done:
self._get_data(unreader, buf)
idx = buf.getvalue().find(b("\r\n\r\n"))
done = buf.getvalue()[:2] == b("\r\n")
if done:
self.unreader.unread(buf.getvalue()[2:])
return b("")
self.headers = self.parse_headers(buf.getvalue()[:idx])
ret = buf.getvalue()[idx+4:]
buf.truncate(0)
buf.seek(0)
return ret
def __init__(self, sock, max_chunk=8192):
self.sock = sock
self.max_chunk = max_chunk
self.buf = BufferIO()
class Unreader(object):
"""\
An Unreader is an object that can have previously read
bytes pushed back into it to be re-read. This helps so
that we don't have to read bytes one at a time.
"""
def __init__(self, sock, max_chunk=8192):
self.sock = sock
self.max_chunk = max_chunk
self.buf = BufferIO()
def _data(self):
return self.sock.recv(self.max_chunk)
def unread(self, data):
self.buf.seek(0, os.SEEK_END)
self.buf.write(data)
def read(self, size=None):
if size is not None and not isinstance(size, (int, long)):
raise TypeError("size parameter must be an int or long.")
if size == 0:
return ""
if size is None or size < 0:
size = None
self.buf.seek(0, os.SEEK_END)
if size is None and self.buf.tell():
ret = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
return ret
if size is None:
return self._data()
while self.buf.tell() < size:
data = self._data()
if not len(data):
ret = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
return ret
self.buf.write(data)
data = self.buf.getvalue()
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(data[size:])
return data[:size]
def __init__(self, reader):
self.reader = reader
self.buf = BufferIO()
self.pre_read = None
class ChunkedReader(object):
"""\
A class that is capable of decoding an HTTP request body
that uses chunked transfer encoding. Also attempts to
parse any trailers that may be present setting them on
the request instance.
"""
def __init__(self, unreader, req):
self.parser = self.parse_chunked(unreader)
self.req = req
self.buf = BufferIO()
self.trailer_handler = None
def set_trailer_handler(self, func):
if not callable(func):
raise TypeError("Trailer handler must be callable.")
self.trailer_handler = func
def read(self, size):
if not isinstance(size, (int, long)):
raise TypeError("size must be an integral type")
if size <= 0:
raise ValueError("Size must be positive.")
if size == 0:
return ""
if self.parser:
while self.buf.tell() < size:
try:
self.buf.write(self.parser.next())
except StopIteration:
self.parser = None
break
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def parse_trailers(self, unreader, data):
buf = BufferIO()
buf.write(data)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
while idx < 0 and not done:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
if done:
unreader.unread(buf.getvalue()[2:])
return ""
self.req.trailers = self.req.parse_headers(buf.getvalue()[:idx])
if self.trailer_handler is not None:
self.trailer_handler(self.req.trailers)
unreader.unread(buf.getvalue()[idx + 4:])
def parse_chunked(self, unreader):
(size, rest) = self.parse_chunk_size(unreader)
while size > 0:
while size > len(rest):
size -= len(rest)
yield rest
rest = unreader.read()
if not rest:
raise ParseError("Client disconected during chunk.")
yield rest[:size]
# Remove \r\n after chunk
rest = rest[size:]
while len(rest) < 2:
rest += unreader.read()
if rest[:2] != '\r\n':
raise ParseError("Chunk is missing the \\r\\n terminator.")
(size, rest) = self.parse_chunk_size(unreader, data=rest[2:])
def parse_chunk_size(self, unreader, data=None):
buf = BufferIO()
if data is not None:
buf.write(data)
idx = buf.getvalue().find("\r\n")
while idx < 0:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n")
data = buf.getvalue()
line, rest_chunk = data[:idx], data[idx + 2:]
chunk_size = line.split(";", 1)[0].strip()
try:
chunk_size = int(chunk_size, 16)
except ValueError:
raise ParseError("Invalid chunk size: %r" % chunk_size)
if chunk_size == 0:
try:
self.parse_trailers(unreader, rest_chunk)
except NoMoreData:
pass
return (0, None)
return (chunk_size, rest_chunk)
def get_data(self, unreader, buf):
data = unreader.read()
if not data:
raise ParseError("Client disconnected while reading chunked body.")
raise NoMoreData()
buf.write(data)
class ChunkedReader(object):
"""\
A class that is capable of decoding an HTTP request body
that uses chunked transfer encoding. Also attempts to
parse any trailers that may be present setting them on
the request instance.
"""
def __init__(self, unreader, req):
self.parser = self.parse_chunked(unreader)
self.req = req
self.buf = BufferIO()
self.trailer_handler = None
def set_trailer_handler(self, func):
if not callable(func):
raise TypeError("Trailer handler must be callable.")
self.trailer_handler = func
def read(self, size):
if not isinstance(size, (int, long)):
raise TypeError("size must be an integral type")
if size <= 0:
raise ValueError("Size must be positive.")
if size == 0:
return ""
if self.parser:
while self.buf.tell() < size:
try:
self.buf.write(self.parser.next())
except StopIteration:
self.parser = None
break
data = self.buf.getvalue()
ret, rest = data[:size], data[size:]
self.buf.truncate(0)
self.buf.seek(0)
self.buf.write(rest)
return ret
def parse_trailers(self, unreader, data):
buf = BufferIO()
buf.write(data)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
while idx < 0 and not done:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n\r\n")
done = buf.getvalue()[:2] == "\r\n"
if done:
unreader.unread(buf.getvalue()[2:])
return ""
self.req.trailers = self.req.parse_headers(buf.getvalue()[:idx])
if self.trailer_handler is not None:
self.trailer_handler(self.req.trailers)
unreader.unread(buf.getvalue()[idx+4:])
def parse_chunked(self, unreader):
(size, rest) = self.parse_chunk_size(unreader)
while size > 0:
while size > len(rest):
size -= len(rest)
yield rest
rest = unreader.read()
if not rest:
raise ParseError("Client disconected during chunk.")
yield rest[:size]
# Remove \r\n after chunk
rest = rest[size:]
while len(rest) < 2:
rest += unreader.read()
if rest[:2] != '\r\n':
raise ParseError("Chunk is missing the \\r\\n terminator.")
(size, rest) = self.parse_chunk_size(unreader, data=rest[2:])
def parse_chunk_size(self, unreader, data=None):
buf = BufferIO()
if data is not None:
buf.write(data)
idx = buf.getvalue().find("\r\n")
while idx < 0:
self.get_data(unreader, buf)
idx = buf.getvalue().find("\r\n")
data = buf.getvalue()
line, rest_chunk = data[:idx], data[idx+2:]
chunk_size = line.split(";", 1)[0].strip()
try:
chunk_size = int(chunk_size, 16)
except ValueError:
raise ParseError("Invalid chunk size: %r" % chunk_size)
if chunk_size == 0:
try:
self.parse_trailers(unreader, rest_chunk)
except NoMoreData:
pass
return (0, None)
return (chunk_size, rest_chunk)
def get_data(self, unreader, buf):
data = unreader.read()
if not data:
raise ParseError("Client disconnected while reading chunked body.")
raise NoMoreData()
buf.write(data)
