Move multipart resource handling to core/fetch (2/2)

content/child/multipart_response_delegate.h

-// Copyright 2014 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.
-//
-// A delegate class of WebURLLoaderImpl that handles multipart/x-mixed-replace
-// data.  We special case multipart/x-mixed-replace because WebCore expects a
-// separate didReceiveResponse for each new message part.
-//
-// Most of the logic and edge case handling are based on the Mozilla's
-// implementation in netwerk/streamconv/converters/nsMultiMixedConv.cpp.
-// This seems like a derivative work, so here's the original license:
-
-/* ***** 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.org code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * 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 ***** */
-
-#ifndef CONTENT_CHILD_MULTIPART_RESPONSE_DELEGATE_H_
-#define CONTENT_CHILD_MULTIPART_RESPONSE_DELEGATE_H_
-
-#include <string>
-
-#include <stddef.h>
-
-#include <stdint.h>
-
-#include "base/macros.h"
-#include "content/common/content_export.h"
-#include "third_party/WebKit/public/platform/WebURLResponse.h"
-
-namespace blink {
-class WebURLLoader;
-class WebURLLoaderClient;
-}
-
-namespace content {
-
-class CONTENT_EXPORT MultipartResponseDelegate {
- public:
-  MultipartResponseDelegate(blink::WebURLLoaderClient* client,
-                            blink::WebURLLoader* loader,
-                            const blink::WebURLResponse& response,
-                            const std::string& boundary);
-
-  // Passed through from ResourceHandleInternal
-  void OnReceivedData(const char* data, int data_len, int encoded_data_length);
-  void OnCompletedRequest();
-
-  // The request has been canceled, so stop making calls to the client.
-  void Cancel() {
-    client_ = NULL;
-    loader_ = NULL;
-  }
-
- private:
-  friend class MultipartResponseDelegateTester;  // For unittests.
-
-  // Pointers to the client and associated loader so we can make callbacks as
-  // we parse pieces of data.
-  blink::WebURLLoaderClient* client_;
-  blink::WebURLLoader* loader_;
-
-  // The original resource response for this request.  We use this as a
-  // starting point for each parts response.
-  blink::WebURLResponse original_response_;
-
-  // Checks to see if data[pos] character is a line break; handles crlf, lflf,
-  // lf, or cr. Returns the number of characters to skip over (0, 1 or 2).
-  int PushOverLine(const std::string& data, size_t pos);
-
-  // Tries to parse http headers from the start of data_.  Returns true if it
-  // succeeds and sends a didReceiveResponse to m_client.  Returns false if
-  // the header is incomplete (in which case we just wait for more data).
-  bool ParseHeaders();
-
-  // Find the next boundary in data_.  Returns std::string::npos if there's no
-  // full token.
-  size_t FindBoundary();
-
-  // Transferred data size accumulated between client callbacks.
-  int encoded_data_length_;
-
-  // A temporary buffer to hold data between reads for multipart data that
-  // gets split in the middle of a header.
-  std::string data_;
-
-  // Multipart boundary token
-  std::string boundary_;
-
-  // true until we get our first on received data call
-  bool first_received_data_;
-
-  // true if we're truncated in the middle of a header
-  bool processing_headers_;
-
-  // true when we're done sending information.  At that point, we stop
-  // processing AddData requests.
-  bool stop_sending_;
-
-  // true after we've sent our first response to the WebURLLoaderClient.
-  bool has_sent_first_response_;
-
-  DISALLOW_COPY_AND_ASSIGN(MultipartResponseDelegate);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_CHILD_MULTIPART_RESPONSE_DELEGATE_H_