Remove //net (except for Android test stuff) and sdch

net/http/http_chunked_decoder.cc

-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
-// 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 <darin@netscape.com> (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 ***** */
-
-#include "net/http/http_chunked_decoder.h"
-
-#include <algorithm>
-
-#include "base/logging.h"
-#include "base/strings/string_number_conversions.h"
-#include "base/strings/string_piece.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 = 16384;
-
-HttpChunkedDecoder::HttpChunkedDecoder()
-    : chunk_remaining_(0),
-      chunk_terminator_remaining_(false),
-      reached_last_chunk_(false),
-      reached_eof_(false),
-      bytes_after_eof_(0) {
-}
-
-int HttpChunkedDecoder::FilterBuf(char* buf, int buf_len) {
-  int result = 0;
-
-  while (buf_len) {
-    if (chunk_remaining_) {
-      int num = std::min(chunk_remaining_, buf_len);
-
-      buf_len -= num;
-      chunk_remaining_ -= num;
-
-      result += num;
-      buf += num;
-
-      // After each chunk's data there should be a CRLF
-      if (!chunk_remaining_)
-        chunk_terminator_remaining_ = true;
-      continue;
-    } else if (reached_eof_) {
-      bytes_after_eof_ += buf_len;
-      break;  // Done!
-    }
-
-    int bytes_consumed = ScanForChunkRemaining(buf, buf_len);
-    if (bytes_consumed < 0)
-      return bytes_consumed; // Error
-
-    buf_len -= bytes_consumed;
-    if (buf_len)
-      memmove(buf, buf + bytes_consumed, buf_len);
-  }
-
-  return result;
-}
-
-int HttpChunkedDecoder::ScanForChunkRemaining(const char* buf, int buf_len) {
-  DCHECK_EQ(0, chunk_remaining_);
-  DCHECK_GT(buf_len, 0);
-
-  int bytes_consumed = 0;
-
-  size_t index_of_lf = base::StringPiece(buf, buf_len).find('\n');
-  if (index_of_lf != base::StringPiece::npos) {
-    buf_len = static_cast<int>(index_of_lf);
-    if (buf_len && buf[buf_len - 1] == '\r')  // Eliminate a preceding CR.
-      buf_len--;
-    bytes_consumed = static_cast<int>(index_of_lf) + 1;
-
-    // Make buf point to the full line buffer to parse.
-    if (!line_buf_.empty()) {
-      line_buf_.append(buf, buf_len);
-      buf = line_buf_.data();
-      buf_len = static_cast<int>(line_buf_.size());
-    }
-
-    if (reached_last_chunk_) {
-      if (buf_len)
-        DVLOG(1) << "ignoring http trailer";
-      else
-        reached_eof_ = true;
-    } else if (chunk_terminator_remaining_) {
-      if (buf_len) {
-        DLOG(ERROR) << "chunk data not terminated properly";
-        return ERR_INVALID_CHUNKED_ENCODING;
-      }
-      chunk_terminator_remaining_ = false;
-    } else if (buf_len) {
-      // Ignore any chunk-extensions.
-      size_t index_of_semicolon = base::StringPiece(buf, buf_len).find(';');
-      if (index_of_semicolon != base::StringPiece::npos)
-        buf_len = static_cast<int>(index_of_semicolon);
-
-      if (!ParseChunkSize(buf, buf_len, &chunk_remaining_)) {
-        DLOG(ERROR) << "Failed parsing HEX from: " <<
-            std::string(buf, buf_len);
-        return ERR_INVALID_CHUNKED_ENCODING;
-      }
-
-      if (chunk_remaining_ == 0)
-        reached_last_chunk_ = true;
-    } else {
-      DLOG(ERROR) << "missing chunk-size";
-      return ERR_INVALID_CHUNKED_ENCODING;
-    }
-    line_buf_.clear();
-  } else {
-    // Save the partial line; wait for more data.
-    bytes_consumed = buf_len;
-
-    // Ignore a trailing CR
-    if (buf[buf_len - 1] == '\r')
-      buf_len--;
-
-    if (line_buf_.length() + buf_len > kMaxLineBufLen) {
-      DLOG(ERROR) << "Chunked line length too long";
-      return ERR_INVALID_CHUNKED_ENCODING;
-    }
-
-    line_buf_.append(buf, buf_len);
-  }
-  return bytes_consumed;
-}
-
-
-// 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 2616: ^\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, int* out) {
-  DCHECK_GE(len, 0);
-
-  // Strip trailing spaces
-  while (len && start[len - 1] == ' ')
-    len--;
-
-  // Be more restrictive than HexStringToInt;
-  // don't allow inputs with leading "-", "+", "0x", "0X"
-  base::StringPiece chunk_size(start, len);
-  if (chunk_size.find_first_not_of("0123456789abcdefABCDEF")
-      != base::StringPiece::npos) {
-    return false;
-  }
-
-  int parsed_number;
-  bool ok = base::HexStringToInt(chunk_size, &parsed_number);
-  if (ok && parsed_number >= 0) {
-    *out = parsed_number;
-    return true;
-  }
-  return false;
-}
-
-}  // namespace net