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#include <QtCore/QDebug>
#include "serveragent.h"
ServerAgent::ServerAgent(QSslSocket *socket, const QDir& local_dir, const QString& passwd, SyncFlags flags, QObject *parent) :
Agent(socket, local_dir, passwd, flags, parent),
_challenge(generateChallenge()), _authAttempted(false), _authOk(false)
{
qDebug() << "Starting server agent at" << QDateTime::currentDateTime();
}
void ServerAgent::handleMessage(MessageType msg, const QByteArray& data)
{
qDebug() << "Server::handleMessage" << msg << data.size();
switch (msg) {
case MSG_HELLO:
if (decodeHelloMessage(data, &_clientChallenge) == PROTO_BAD) {
qWarning() << "Invalid protocol version";
_socket->close();
}
sendMessage(MSG_HELLO_REPLY, _challenge);
break;
case MSG_AUTH:
handleAuth(data);
break;
case MSG_FILE_LIST:
if (!checkAuth()) return;
handleClientFileList(decodeFileInfoList(data));
break;
case MSG_PULL_FILE:
if (!checkAuth()) return;
handlePullFile(decodeFileName(data));
break;
case MSG_PUSH_FILE:
if (!checkAuth()) return;
handlePushedFile(data);
break;
case MSG_PUSH_FILE_METADATA:
if (!checkAuth()) return;
handlePushedMetadata(decodeFileInfoList(data));
break;
case MSG_DELETE_FILE:
if (!checkAuth()) return;
handleDeleteFile(decodeFileName(data));
break;
case MSG_BYE:
if (!checkAuth()) return;
qDebug() << "Got Bye";
emit finished();
_socket->close();
break;
default:
qWarning() << "Unknown message";
break;
}
}
bool ServerAgent::checkAuth()
{
if (_authOk) {
return true;
} else {
sendMessage(MSG_AUTH_REPLY, encodeAuthReply(AUTH_FAILED));
return false;
}
}
void ServerAgent::handleAuth(const QByteArray &response)
{
if (_authAttempted) {
qWarning() << "Too many auth attempts";
sendMessage(MSG_AUTH_REPLY, encodeAuthReply(AUTH_FAILED));
_socket->flush();
_socket->close();
return;
}
_authAttempted = true;
qDebug() << "Server Handling client auth";
if (response == generateChallengeResponse(_challenge, _clientChallenge)) {
_authOk = true;
qDebug() << "Authentication successful";
} else {
_authOk = false;
qDebug() << "Authentication failed";
}
sendMessage(MSG_AUTH_REPLY, encodeAuthReply(_authOk ? AUTH_OK : AUTH_FAILED));
}
void ServerAgent::handleClientFileList(const RemoteFileInfoList& list)
{
QFileInfoList files = scanFiles(QDir(wireToLocalPath(_subPath)));
ActionInfoList actions_create_dirs, actions_with_files, actions_remove_dirs, actions_update_dirs;
QHash<QString, QFileInfo> local_files;
QHash<QString, RemoteFileInfo> remote_files;
QSet<QString> new_local_files;
foreach (const QFileInfo& file, files) {
const QString wire_path = localToWirePath(file.absoluteFilePath());
local_files[wire_path] = file;
new_local_files.insert(wire_path);
}
foreach (const RemoteFileInfo& file, list) {
remote_files[file.name()] = file;
}
foreach (const RemoteFileInfo& remote, list) {
// Main synchronization logic goes here
QString wire_path = remote.name();
qDebug() << "Server Handling file" << wire_path;
new_local_files.remove(wire_path);
if (local_files.contains(wire_path)) {
// Both remote and local have the file
QFileInfo local = local_files[wire_path];
QString parent_name = wireParentPath(wire_path);
QFileInfo parent_local = local_files[parent_name];
RemoteFileInfo parent_remote = remote_files[parent_name];
Q_ASSERT(local.exists());
if (remote.isDir() && local.isDir()) {
if (equalDateTime(remote.lastModified(), local.lastModified())) {
if (local.lastModified().toTime_t() == 0) {
// Workaround an issue if the local folder is a mountpoint
actions_update_dirs += ActionInfo(ACTION_PULL_METADATA, local);
}
// Nothing to do
} else if (remote.lastModified() > local.lastModified()) {
actions_update_dirs += ActionInfo(ACTION_PUSH_METADATA, local);
} else {
actions_update_dirs += ActionInfo(ACTION_PULL_METADATA, local);
}
} else if (remote.isDir() == local.isDir() &&
equalDateTime(remote.lastModified(), local.lastModified()) &&
remote.size() == local.size()) {
// Nothing to do
} else if (remote.isDir() != local.isDir()) {
// Dir to file transformation, delete the most recent file
if (parent_remote.lastModified() > parent_local.lastModified()) {
if (local.isDir()) {
actions_remove_dirs += ActionInfo(ACTION_PUSH_DELETE, local);
} else {
actions_with_files += ActionInfo(ACTION_PUSH_DELETE, local);
}
} else {
if (remote.isDir()) {
actions_remove_dirs += ActionInfo(ACTION_PULL_DELETE, local);
} else {
actions_with_files += ActionInfo(ACTION_PULL_DELETE, local);
}
}
} else if (remote.lastModified() > local.lastModified()) {
if (remote.isDir()) {
actions_create_dirs += ActionInfo(ACTION_PUSH, local);
} else {
actions_with_files += ActionInfo(ACTION_PUSH, local);
}
} else {
if (remote.isDir()) {
actions_create_dirs += ActionInfo(ACTION_PULL, local);
} else {
actions_with_files += ActionInfo(ACTION_PULL, local);
}
}
} else {
// File is in remote, but not in local
qDebug() << " file deleted";
QString parent_name = findExistingCommonAncestor(wire_path, local_files, remote_files);
QFileInfo local(wireToLocalPath(wire_path)); // Create invalid QFileInfo
QFileInfo parent_local = local_files[parent_name];
RemoteFileInfo parent_remote = remote_files[parent_name];
if (parent_remote.lastModified() > parent_local.lastModified()) {
if (remote.isDir()) {
actions_create_dirs += ActionInfo(ACTION_PUSH, local);
actions_update_dirs += ActionInfo(ACTION_PUSH_METADATA, local);
} else {
actions_with_files += ActionInfo(ACTION_PUSH, local);
}
} else {
if (remote.isDir()) {
actions_remove_dirs += ActionInfo(ACTION_PULL_DELETE, local);
} else {
actions_with_files += ActionInfo(ACTION_PULL_DELETE, local);
}
}
}
}
foreach (const QString& path, new_local_files) {
// File is in local, but not in remote
QString parent_name = findExistingCommonAncestor(path, local_files, remote_files);
QFileInfo local = local_files[path];
QFileInfo parent_local = local_files[parent_name];
RemoteFileInfo parent_remote = remote_files[parent_name];
if (parent_remote.lastModified() > parent_local.lastModified()) {
if (local.isDir()) {
actions_remove_dirs += ActionInfo(ACTION_PUSH_DELETE, local);
} else {
actions_with_files += ActionInfo(ACTION_PUSH_DELETE, local);
}
} else {
if (local.isDir()) {
actions_create_dirs += ActionInfo(ACTION_PULL, local);
actions_update_dirs += ActionInfo(ACTION_PULL_METADATA, local);
} else {
actions_with_files += ActionInfo(ACTION_PULL, local);
}
}
}
qSort(actions_create_dirs.begin(), actions_create_dirs.end(),
static_cast<bool (*)(const ActionInfo&, const ActionInfo&)>(lessPathDepthThan));
qSort(actions_remove_dirs.begin(), actions_remove_dirs.end(),
static_cast<bool (*)(const ActionInfo&, const ActionInfo&)>(morePathDepthThan));
qSort(actions_update_dirs.begin(), actions_update_dirs.end(),
static_cast<bool (*)(const ActionInfo&, const ActionInfo&)>(morePathDepthThan));
ActionInfoList actions = actions_create_dirs +
actions_with_files + actions_remove_dirs +
actions_update_dirs;
sendMessage(MSG_FILE_ACTIONS_REPLY, encodeActionInfoList(actions));
}
void ServerAgent::handlePullFile(const QString &path)
{
QFile file(wireToLocalPath(path));
if (file.open(QIODevice::ReadOnly)) {
QByteArray ba = file.readAll();
if (_flags & SYNC_COMPRESS) {
int old_size = ba.size();
ba = Compressor::compress(ba);
qDebug() << "Compress" << old_size << "->" << ba.size();
}
file.close();
sendMessage(MSG_PULL_FILE_REPLY, ba);
} else {
qWarning() << "Failed to open file" << file.fileName() << "for reading";
}
}
void ServerAgent::handlePushedFile(const QByteArray &ba)
{
if (_flags & SYNC_READ_ONLY) return;
int len;
QString wire_path = decodeFileNameItem(ba, &len);
QByteArray file_data = Compressor::decompress(ba.mid(len));
QFile file(wireToLocalPath(wire_path));
if (file.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
file.write(file_data);
file.close();
} else {
qWarning() << "Failed to open file" << file.fileName() << "for writing";
}
}
void ServerAgent::handlePushedMetadata(const RemoteFileInfoList& list)
{
if (_flags & SYNC_READ_ONLY) return;
foreach (const RemoteFileInfo& remote, list) {
QString local_path = wireToLocalPath(remote.name());
setLocalFileDateTime(local_path, remote.lastModified());
}
}
void ServerAgent::handleDeleteFile(const QString &path)
{
if (_flags & SYNC_READ_ONLY) return;
QString local_path = wireToLocalPath(path);
if (!QDir().remove(local_path)) {
qWarning() << "Failed to remove file" << local_path;
}
}
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