/usr/share/common-lisp/source/chunga/streams.lisp is in cl-chunga 1.1.5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 | ;;; -*- Mode: LISP; Syntax: COMMON-LISP; Package: CHUNGA; Base: 10 -*-
;;; $Header: /usr/local/cvsrep/chunga/streams.lisp,v 1.10 2008/05/24 03:06:22 edi Exp $
;;; Copyright (c) 2006-2010, Dr. Edmund Weitz. All rights reserved.
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(in-package :chunga)
(defclass chunked-stream (trivial-gray-stream-mixin)
((real-stream :initarg :real-stream
:reader chunked-stream-stream
:documentation "The actual stream that's used for
input and/or output."))
(:documentation "Every chunked stream returned by
MAKE-CHUNKED-STREAM is of this type which is a subtype of
STREAM."))
(defclass chunked-input-stream (chunked-stream fundamental-binary-input-stream)
((input-chunking-p :initform nil
:reader chunked-stream-input-chunking-p
:documentation "Whether input chunking is currently enabled.")
(input-buffer :initform nil
:documentation "A vector containing the binary
data from the most recent chunk that was read.")
(input-index :initform 0
:accessor chunked-stream-input-index
:documentation "The current position within INPUT-BUFFER.")
(input-limit :initform 0
:accessor chunked-stream-input-limit
:documentation "Only the content in INPUT-BUFFER
up to INPUT-LIMIT belongs to the current chunk.")
(chunk-extensions :initform nil
:reader chunked-input-stream-extensions
:documentation "An alist of attribute/value
pairs corresponding to the optional `chunk extensions' which
might be encountered when reading from a chunked stream.")
(chunk-trailers :initform nil
:reader chunked-input-stream-trailers
:documentation "An alist of attribute/value
pairs corresponding to the optional `trailer' HTTP headers which
might be encountered at the end of a chunked stream.")
(expecting-crlf-p :initform nil
:accessor expecting-crlf-p
:documentation "Whether we expect to see
CRLF before we can read the next chunk-size header part from the
stream. \(This will actually be the CRLF from the end of the
last chunk-data part.)"))
(:documentation "A chunked stream is of this type if its
underlying stream is an input stream. This is a subtype of
CHUNKED-STREAM."))
(defclass chunked-output-stream (chunked-stream fundamental-binary-output-stream)
((output-chunking-p :initform nil
:reader chunked-stream-output-chunking-p
:documentation "Whether output chunking is
currently enabled.")
(output-buffer :initform (make-array +output-buffer-size+ :element-type '(unsigned-byte 8))
:accessor output-buffer
:documentation "A vector used to temporarily
store data which will output in one chunk.")
(output-index :initform 0
:accessor output-index
:documentation "The current end of OUTPUT-BUFFER."))
(:documentation "A chunked stream is of this type if its
underlying stream is an output stream. This is a subtype of
CHUNKED-STREAM."))
(defclass chunked-io-stream (chunked-input-stream chunked-output-stream)
()
(:documentation "A chunked stream is of this type if it is both
a CHUNKED-INPUT-STREAM as well as a CHUNKED-OUTPUT-STREAM."))
(defmethod stream-element-type ((stream chunked-stream))
"Chunked streams are always binary streams. Wrap them with
flexi streams if you need a character stream."
'(unsigned-byte 8))
(defmethod open-stream-p ((stream chunked-stream))
"A chunked stream is open if its underlying stream is open."
(open-stream-p (chunked-stream-stream stream)))
(defmethod close ((stream chunked-stream) &key abort)
"If a chunked stream is closed, we close the underlying stream as well."
(with-slots (real-stream)
stream
(cond ((open-stream-p real-stream)
(close real-stream :abort abort))
(t nil))))
(defun make-chunked-stream (stream)
"Creates and returns a chunked stream \(a stream of type
CHUNKED-STREAM) which wraps STREAM. STREAM must be an open
binary stream."
(unless (and (streamp stream)
(open-stream-p stream))
(error 'parameter-error
:stream stream
:format-control "~S should have been an open stream."
:format-arguments (list stream)))
(make-instance ;; actual type depends on STREAM
(cond ((and (input-stream-p stream)
(output-stream-p stream))
'chunked-io-stream)
((input-stream-p stream)
'chunked-input-stream)
((output-stream-p stream)
'chunked-output-stream))
:real-stream stream))
|