root/net/tools/flip_server/streamer_interface.cc

DEFINITIONS

1. http_framer_
2. set_is_request
3. InitSMInterface
4. InitSMConnection
5. ProcessReadInput
6. ProcessWriteInput
7. Error
8. ErrorAsString
9. MessageFullyRead
10. Reset
11. ResetForNewConnection
12. Cleanup
13. PostAcceptHook
14. SendSynStream
15. SendSynReply
16. ProcessBodyInput
17. MessageDone
18. ProcessHeaders
19. HandleHeaderError
20. HandleChunkingError
21. HandleBodyError
22. HandleError

// Copyright (c) 2009 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.

#include "net/tools/flip_server/streamer_interface.h"

#include <string>

#include "net/tools/balsa/balsa_frame.h"
#include "net/tools/flip_server/constants.h"
#include "net/tools/flip_server/flip_config.h"
#include "net/tools/flip_server/sm_connection.h"

namespace net {

std::string StreamerSM::forward_ip_header_;

StreamerSM::StreamerSM(SMConnection* connection,
                       SMInterface* sm_other_interface,
                       EpollServer* epoll_server,
                       FlipAcceptor* acceptor)
    : connection_(connection),
      sm_other_interface_(sm_other_interface),
      epoll_server_(epoll_server),
      acceptor_(acceptor),
      is_request_(false),
      http_framer_(new BalsaFrame) {
  VLOG(2) << ACCEPTOR_CLIENT_IDENT << "Creating StreamerSM object";
  http_framer_->set_balsa_visitor(this);
  http_framer_->set_balsa_headers(&headers_);
  http_framer_->set_is_request(false);
}

StreamerSM::~StreamerSM() {
  VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Destroying StreamerSM object";
  Reset();
  delete http_framer_;
}

void StreamerSM::set_is_request() {
  is_request_ = true;
  http_framer_->set_is_request(true);
}

void StreamerSM::InitSMInterface(SMInterface* sm_other_interface,
                                 int32 server_idx) {
  sm_other_interface_ = sm_other_interface;
}

void StreamerSM::InitSMConnection(SMConnectionPoolInterface* connection_pool,
                                  SMInterface* sm_interface,
                                  EpollServer* epoll_server,
                                  int fd,
                                  std::string server_ip,
                                  std::string server_port,
                                  std::string remote_ip,
                                  bool use_ssl) {
  VLOG(2) << ACCEPTOR_CLIENT_IDENT << "StreamerSM: Initializing server "
          << "connection.";
  connection_->InitSMConnection(connection_pool,
                                sm_interface,
                                epoll_server,
                                fd,
                                server_ip,
                                server_port,
                                remote_ip,
                                use_ssl);
}

size_t StreamerSM::ProcessReadInput(const char* data, size_t len) {
  // For now we only want to parse http requests. Just stream responses
  if (is_request_) {
    return http_framer_->ProcessInput(data, len);
  } else {
    return sm_other_interface_->ProcessWriteInput(data, len);
  }
}

size_t StreamerSM::ProcessWriteInput(const char* data, size_t len) {
  char* dataPtr = new char[len];
  memcpy(dataPtr, data, len);
  DataFrame* df = new DataFrame;
  df->data = (const char*)dataPtr;
  df->size = len;
  df->delete_when_done = true;
  connection_->EnqueueDataFrame(df);
  return len;
}

bool StreamerSM::Error() const { return false; }

const char* StreamerSM::ErrorAsString() const { return "(none)"; }

bool StreamerSM::MessageFullyRead() const {
  if (is_request_) {
    return http_framer_->MessageFullyRead();
  } else {
    return false;
  }
}

void StreamerSM::Reset() {
  VLOG(1) << ACCEPTOR_CLIENT_IDENT << "StreamerSM: Reset";
  connection_->Cleanup("Server Reset");
  http_framer_->Reset();
}

void StreamerSM::ResetForNewConnection() {
  http_framer_->Reset();
  sm_other_interface_->Reset();
}

void StreamerSM::Cleanup() {
  if (is_request_)
    http_framer_->Reset();
}

int StreamerSM::PostAcceptHook() {
  if (!sm_other_interface_) {
    SMConnection* server_connection = SMConnection::NewSMConnection(
        epoll_server_, NULL, NULL, acceptor_, "server_conn: ");
    if (server_connection == NULL) {
      LOG(ERROR) << "StreamerSM: Could not create server conenction.";
      return 0;
    }
    VLOG(2) << ACCEPTOR_CLIENT_IDENT << "StreamerSM: Creating new server "
            << "connection.";
    sm_other_interface_ =
        new StreamerSM(server_connection, this, epoll_server_, acceptor_);
    sm_other_interface_->InitSMInterface(this, 0);
  }
  // The Streamer interface is used to stream HTTPS connections, so we
  // will always use the https_server_ip/port here.
  sm_other_interface_->InitSMConnection(NULL,
                                        sm_other_interface_,
                                        epoll_server_,
                                        -1,
                                        acceptor_->https_server_ip_,
                                        acceptor_->https_server_port_,
                                        std::string(),
                                        false);

  return 1;
}

size_t StreamerSM::SendSynStream(uint32 stream_id,
                                 const BalsaHeaders& headers) {
  return 0;
}

size_t StreamerSM::SendSynReply(uint32 stream_id, const BalsaHeaders& headers) {
  return 0;
}

void StreamerSM::ProcessBodyInput(const char* input, size_t size) {
  VLOG(2) << ACCEPTOR_CLIENT_IDENT
          << "StreamerHttpSM: Process Body Input Data: "
          << "size " << size;
  sm_other_interface_->ProcessWriteInput(input, size);
}

void StreamerSM::MessageDone() {
  if (acceptor_->flip_handler_type_ == FLIP_HANDLER_PROXY) {
    VLOG(2) << ACCEPTOR_CLIENT_IDENT << "StreamerHttpSM: MessageDone.";
    // TODO(kelindsay): anything need to be done ehre?
  } else {
    VLOG(2) << ACCEPTOR_CLIENT_IDENT << "StraemerHttpSM: MessageDone.";
  }
}

void StreamerSM::ProcessHeaders(const BalsaHeaders& headers) {
  VLOG(2) << ACCEPTOR_CLIENT_IDENT << "HttpStreamerSM: Process Headers";
  BalsaHeaders mod_headers;
  mod_headers.CopyFrom(headers);
  if (forward_ip_header_.length()) {
    LOG(INFO) << "Adding forward header: " << forward_ip_header_;
    mod_headers.ReplaceOrAppendHeader(forward_ip_header_,
                                      connection_->client_ip());
  } else {
    LOG(INFO) << "NOT adding forward header.";
  }
  SimpleBuffer sb;
  char* buffer;
  int size;
  mod_headers.WriteHeaderAndEndingToBuffer(&sb);
  sb.GetReadablePtr(&buffer, &size);
  sm_other_interface_->ProcessWriteInput(buffer, size);
}

void StreamerSM::HandleHeaderError(BalsaFrame* framer) { HandleError(); }

void StreamerSM::HandleChunkingError(BalsaFrame* framer) { HandleError(); }

void StreamerSM::HandleBodyError(BalsaFrame* framer) { HandleError(); }

void StreamerSM::HandleError() {
  VLOG(1) << ACCEPTOR_CLIENT_IDENT << "Error detected";
}

}  // namespace net