http_chunked_decoder.cc | Explore in Territory

// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Derived from:
//   mozilla/netwerk/protocol/http/src/nsHttpChunkedDecoder.cpp
// The license block is:
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <[email protected]> (original author)
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40284755): Remove this and spanify to fix the errors.
#pragma allow_unsafe_buffers
#endif

#include "net/http/http_chunked_decoder.h"

#include <algorithm>
#include <string_view>

#include "base/logging.h"
#include "base/ranges/algorithm.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "net/base/net_errors.h"

namespace net {

// Absurdly long size to avoid imposing a constraint on chunked encoding
// extensions.
const size_t HttpChunkedDecoder::kMaxLineBufLen = …;

HttpChunkedDecoder::HttpChunkedDecoder() = default;

int HttpChunkedDecoder::FilterBuf(char* buf, int buf_len) { … }

int HttpChunkedDecoder::ScanForChunkRemaining(const char* buf, int buf_len) { … }


// While the HTTP 1.1 specification defines chunk-size as 1*HEX
// some sites rely on more lenient parsing.
// http://www.yahoo.com/, for example, pads chunk-size with trailing spaces
// (0x20) to be 7 characters long, such as "819b   ".
//
// A comparison of browsers running on WindowsXP shows that
// they will parse the following inputs (egrep syntax):
//
// Let \X be the character class for a hex digit: [0-9a-fA-F]
//
//   RFC 7230: ^\X+$
//        IE7: ^\X+[^\X]*$
// Safari 3.1: ^[\t\r ]*\X+[\t ]*$
//  Firefox 3: ^[\t\f\v\r ]*[+]?(0x)?\X+[^\X]*$
// Opera 9.51: ^[\t\f\v ]*[+]?(0x)?\X+[^\X]*$
//
// Our strategy is to be as strict as possible, while not breaking
// known sites.
//
//         Us: ^\X+[ ]*$
bool HttpChunkedDecoder::ParseChunkSize(const char* start,
                                        int len,
                                        int64_t* out) { … }

}  // namespace net
chromium/net/http/http_chunked_decoder.cc
