[Sync] Move //sync to //components/sync.

sync/engine/net/server_connection_manager.cc

Index: sync/engine/net/server_connection_manager.cc
diff --git a/sync/engine/net/server_connection_manager.cc b/sync/engine/net/server_connection_manager.cc
deleted file mode 100644
index b496f5b674bd0a28d1420374f60da77d4bf2faec..0000000000000000000000000000000000000000
--- a/sync/engine/net/server_connection_manager.cc
+++ /dev/null
@@ -1,337 +0,0 @@
-// Copyright (c) 2012 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 "sync/engine/net/server_connection_manager.h"
-
-#include <errno.h>
-#include <stdint.h>
-
-#include <ostream>
-#include <string>
-#include <vector>
-
-#include "base/metrics/histogram.h"
-#include "build/build_config.h"
-#include "net/base/net_errors.h"
-#include "net/http/http_status_code.h"
-#include "sync/engine/net/url_translator.h"
-#include "sync/engine/syncer.h"
-#include "sync/internal_api/public/base/cancelation_signal.h"
-#include "sync/protocol/sync.pb.h"
-#include "sync/syncable/directory.h"
-#include "url/gurl.h"
-
-namespace syncer {
-
-using std::ostream;
-using std::string;
-using std::vector;
-
-static const char kSyncServerSyncPath[] = "/command/";
-
-HttpResponse::HttpResponse()
-    : response_code(kUnsetResponseCode),
-      content_length(kUnsetContentLength),
-      payload_length(kUnsetPayloadLength),
-      server_status(NONE) {}
-
-#define ENUM_CASE(x) case x: return #x; break
-
-const char* HttpResponse::GetServerConnectionCodeString(
-    ServerConnectionCode code) {
-  switch (code) {
-    ENUM_CASE(NONE);
-    ENUM_CASE(CONNECTION_UNAVAILABLE);
-    ENUM_CASE(IO_ERROR);
-    ENUM_CASE(SYNC_SERVER_ERROR);
-    ENUM_CASE(SYNC_AUTH_ERROR);
-    ENUM_CASE(SERVER_CONNECTION_OK);
-    ENUM_CASE(RETRY);
-  }
-  NOTREACHED();
-  return "";
-}
-
-#undef ENUM_CASE
-
-ServerConnectionManager::Connection::Connection(
-    ServerConnectionManager* scm) : scm_(scm) {
-}
-
-ServerConnectionManager::Connection::~Connection() {
-}
-
-bool ServerConnectionManager::Connection::ReadBufferResponse(
-    string* buffer_out,
-    HttpResponse* response,
-    bool require_response) {
-  if (net::HTTP_OK != response->response_code) {
-    response->server_status = HttpResponse::SYNC_SERVER_ERROR;
-    return false;
-  }
-
-  if (require_response && (1 > response->content_length))
-    return false;
-
-  const int64_t bytes_read =
-      ReadResponse(buffer_out, static_cast<int>(response->content_length));
-  if (bytes_read != response->content_length) {
-    response->server_status = HttpResponse::IO_ERROR;
-    return false;
-  }
-  return true;
-}
-
-bool ServerConnectionManager::Connection::ReadDownloadResponse(
-    HttpResponse* response,
-    string* buffer_out) {
-  const int64_t bytes_read =
-      ReadResponse(buffer_out, static_cast<int>(response->content_length));
-
-  if (bytes_read != response->content_length) {
-    LOG(ERROR) << "Mismatched content lengths, server claimed " <<
-        response->content_length << ", but sent " << bytes_read;
-    response->server_status = HttpResponse::IO_ERROR;
-    return false;
-  }
-  return true;
-}
-
-ServerConnectionManager::ScopedConnectionHelper::ScopedConnectionHelper(
-    ServerConnectionManager* manager, Connection* connection)
-    : manager_(manager), connection_(connection) {}
-
-ServerConnectionManager::ScopedConnectionHelper::~ScopedConnectionHelper() {
-  if (connection_)
-    manager_->OnConnectionDestroyed(connection_.get());
-  connection_.reset();
-}
-
-ServerConnectionManager::Connection*
-ServerConnectionManager::ScopedConnectionHelper::get() {
-  return connection_.get();
-}
-
-namespace {
-
-string StripTrailingSlash(const string& s) {
-  int stripped_end_pos = s.size();
-  if (s.at(stripped_end_pos - 1) == '/') {
-    stripped_end_pos = stripped_end_pos - 1;
-  }
-
-  return s.substr(0, stripped_end_pos);
-}
-
-}  // namespace
-
-// TODO(chron): Use a GURL instead of string concatenation.
-string ServerConnectionManager::Connection::MakeConnectionURL(
-    const string& sync_server,
-    const string& path,
-    bool use_ssl) const {
-  string connection_url = (use_ssl ? "https://" : "http://");
-  connection_url += sync_server;
-  connection_url = StripTrailingSlash(connection_url);
-  connection_url += path;
-
-  return connection_url;
-}
-
-int ServerConnectionManager::Connection::ReadResponse(string* out_buffer,
-                                                      int length) {
-  int bytes_read = buffer_.length();
-  CHECK(length <= bytes_read);
-  out_buffer->assign(buffer_);
-  return bytes_read;
-}
-
-ServerConnectionManager::ServerConnectionManager(
-    const string& server,
-    int port,
-    bool use_ssl,
-    CancelationSignal* cancelation_signal)
-    : sync_server_(server),
-      sync_server_port_(port),
-      use_ssl_(use_ssl),
-      proto_sync_path_(kSyncServerSyncPath),
-      server_status_(HttpResponse::NONE),
-      terminated_(false),
-      active_connection_(NULL),
-      cancelation_signal_(cancelation_signal),
-      signal_handler_registered_(false) {
-  signal_handler_registered_ = cancelation_signal_->TryRegisterHandler(this);
-  if (!signal_handler_registered_) {
-    // Calling a virtual function from a constructor.  We can get away with it
-    // here because ServerConnectionManager::OnSignalReceived() is the function
-    // we want to call.
-    OnSignalReceived();
-  }
-}
-
-ServerConnectionManager::~ServerConnectionManager() {
-  if (signal_handler_registered_) {
-    cancelation_signal_->UnregisterHandler(this);
-  }
-}
-
-ServerConnectionManager::Connection*
-ServerConnectionManager::MakeActiveConnection() {
-  base::AutoLock lock(terminate_connection_lock_);
-  DCHECK(!active_connection_);
-  if (terminated_)
-    return NULL;
-
-  active_connection_ = MakeConnection();
-  return active_connection_;
-}
-
-void ServerConnectionManager::OnConnectionDestroyed(Connection* connection) {
-  DCHECK(connection);
-  base::AutoLock lock(terminate_connection_lock_);
-  // |active_connection_| can be NULL already if it was aborted. Also,
-  // it can legitimately be a different Connection object if a new Connection
-  // was created after a previous one was Aborted and destroyed.
-  if (active_connection_ != connection)
-    return;
-
-  active_connection_ = NULL;
-}
-
-bool ServerConnectionManager::SetAuthToken(const std::string& auth_token) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (previously_invalidated_token != auth_token) {
-    auth_token_.assign(auth_token);
-    previously_invalidated_token = std::string();
-    return true;
-  }
-
-  // This could happen in case like server outage/bug. E.g. token returned by
-  // first request is considered invalid by sync server and because
-  // of token server's caching policy, etc, same token is returned on second
-  // request. Need to notify sync frontend again to request new token,
-  // otherwise backend will stay in SYNC_AUTH_ERROR state while frontend thinks
-  // everything is fine and takes no actions.
-  SetServerStatus(HttpResponse::SYNC_AUTH_ERROR);
-  return false;
-}
-
-void ServerConnectionManager::InvalidateAndClearAuthToken() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  // Copy over the token to previous invalid token.
-  if (!auth_token_.empty()) {
-    previously_invalidated_token.assign(auth_token_);
-    auth_token_ = std::string();
-  }
-}
-
-void ServerConnectionManager::SetServerStatus(
-    HttpResponse::ServerConnectionCode server_status) {
-  // SYNC_AUTH_ERROR is permanent error. Need to notify observer to take
-  // action externally to resolve.
-  if (server_status != HttpResponse::SYNC_AUTH_ERROR &&
-      server_status_ == server_status) {
-    return;
-  }
-  server_status_ = server_status;
-  NotifyStatusChanged();
-}
-
-void ServerConnectionManager::NotifyStatusChanged() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  FOR_EACH_OBSERVER(ServerConnectionEventListener, listeners_,
-     OnServerConnectionEvent(
-         ServerConnectionEvent(server_status_)));
-}
-
-bool ServerConnectionManager::PostBufferWithCachedAuth(
-    PostBufferParams* params) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  string path =
-      MakeSyncServerPath(proto_sync_path(), MakeSyncQueryString(client_id_));
-  bool result = PostBufferToPath(params, path, auth_token());
-  SetServerStatus(params->response.server_status);
-  return result;
-}
-
-bool ServerConnectionManager::PostBufferToPath(PostBufferParams* params,
-                                               const string& path,
-                                               const string& auth_token) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  // TODO(pavely): crbug.com/273096. Check for "credentials_lost" is added as
-  // workaround for M29 blocker to avoid sending RPC to sync with known invalid
-  // token but instead to trigger refreshing token in ProfileSyncService. Need
-  // to clean it.
-  if (auth_token.empty() || auth_token == "credentials_lost") {
-    params->response.server_status = HttpResponse::SYNC_AUTH_ERROR;
-    // Print a log to distinguish this "known failure" from others.
-    LOG(WARNING) << "ServerConnectionManager forcing SYNC_AUTH_ERROR";
-    return false;
-  }
-
-  // When our connection object falls out of scope, it clears itself from
-  // active_connection_.
-  ScopedConnectionHelper post(this, MakeActiveConnection());
-  if (!post.get()) {
-    params->response.server_status = HttpResponse::CONNECTION_UNAVAILABLE;
-    return false;
-  }
-
-  // Note that |post| may be aborted by now, which will just cause Init to fail
-  // with CONNECTION_UNAVAILABLE.
-  bool ok = post.get()->Init(
-      path.c_str(), auth_token, params->buffer_in, &params->response);
-
-  if (params->response.server_status == HttpResponse::SYNC_AUTH_ERROR) {
-    InvalidateAndClearAuthToken();
-  }
-
-  if (!ok || net::HTTP_OK != params->response.response_code)
-    return false;
-
-  if (post.get()->ReadBufferResponse(
-      &params->buffer_out, &params->response, true)) {
-    params->response.server_status = HttpResponse::SERVER_CONNECTION_OK;
-    return true;
-  }
-  return false;
-}
-
-void ServerConnectionManager::AddListener(
-    ServerConnectionEventListener* listener) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  listeners_.AddObserver(listener);
-}
-
-void ServerConnectionManager::RemoveListener(
-    ServerConnectionEventListener* listener) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  listeners_.RemoveObserver(listener);
-}
-
-ServerConnectionManager::Connection* ServerConnectionManager::MakeConnection() {
-  return NULL;  // For testing.
-}
-
-void ServerConnectionManager::OnSignalReceived() {
-  base::AutoLock lock(terminate_connection_lock_);
-  terminated_ = true;
-  if (active_connection_)
-    active_connection_->Abort();
-
-  // Sever our ties to this connection object. Note that it still may exist,
-  // since we don't own it, but it has been neutered.
-  active_connection_ = NULL;
-}
-
-std::ostream& operator << (std::ostream& s, const struct HttpResponse& hr) {
-  s << " Response Code (bogus on error): " << hr.response_code;
-  s << " Content-Length (bogus on error): " << hr.content_length;
-  s << " Server Status: "
-    << HttpResponse::GetServerConnectionCodeString(hr.server_status);
-  return s;
-}
-
-}  // namespace syncer