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couchdb.cpp
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couchdb.cpp
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#include "couchdb.h"
#include "couchdbserver.h"
#include "couchdbquery.h"
#include "couchdblistener.h"
#include <QNetworkAccessManager>
#include <QNetworkRequest>
#include <QtQml>
#include <QDebug>
class CouchDBPrivate
{
public:
CouchDBPrivate() :
server(0),
cleanServerOnQuit(true),
networkManager(0)
{}
virtual ~CouchDBPrivate()
{
if(server && cleanServerOnQuit) delete server;
if(networkManager) delete networkManager;
}
CouchDBServer *server;
bool cleanServerOnQuit;
QNetworkAccessManager *networkManager;
QHash<QNetworkReply*, CouchDBQuery*> currentQueries;
};
CouchDB::CouchDB(QObject *parent) :
QObject(parent),
d_ptr(new CouchDBPrivate)
{
Q_D(CouchDB);
d->server = new CouchDBServer(this);
d->networkManager = new QNetworkAccessManager(this);
}
CouchDB::~CouchDB()
{
delete d_ptr;
}
void CouchDB::declareQML()
{
qmlRegisterType<CouchDB>("TOP.CouchDB", 1, 0, "CouchDB");
}
CouchDBServer *CouchDB::server() const
{
Q_D(const CouchDB);
return d->server;
}
void CouchDB::setServer(CouchDBServer *server)
{
Q_D(CouchDB);
if(d->server && d->cleanServerOnQuit) delete d->server;
d->server = server;
d->cleanServerOnQuit = false;
}
void CouchDB::setServerConfiguration(const QString &url, const int &port, const QString &username, const QString &password)
{
Q_D(CouchDB);
d->server->setUrl(url);
d->server->setPort(port);
if(!username.isEmpty() && !password.isEmpty()) d->server->setCredential(username, password);
}
void CouchDB::executeQuery(CouchDBQuery *query)
{
Q_D(CouchDB);
if(query->server()->hasCredential() && query->operation() != COUCHDB_STARTSESSION)
{
query->request()->setRawHeader("Authorization", "Basic " + query->server()->credential());
}
qDebug() << "Invoked url:" << query->operation() << query->request()->url().toString();
QNetworkReply * reply;
switch(query->operation()) {
case COUCHDB_CHECKINSTALLATION:
default:
reply = d->networkManager->get(*query->request());
break;
case COUCHDB_STARTSESSION:
reply = d->networkManager->post(*query->request(), query->body());
break;
case COUCHDB_ENDSESSION:
reply = d->networkManager->deleteResource(*query->request());
break;
case COUCHDB_LISTDATABASES:
reply = d->networkManager->get(*query->request());
break;
case COUCHDB_CREATEDATABASE:
reply = d->networkManager->put(*query->request(), query->body());
break;
case COUCHDB_DELETEDATABASE:
reply = d->networkManager->deleteResource(*query->request());
break;
case COUCHDB_LISTDOCUMENTS:
reply = d->networkManager->get(*query->request());
break;
case COUCHDB_RETRIEVEREVISION:
reply = d->networkManager->head(*query->request());
break;
case COUCHDB_RETRIEVEDOCUMENT:
reply = d->networkManager->get(*query->request());
break;
case COUCHDB_UPDATEDOCUMENT:
reply = d->networkManager->put(*query->request(), query->body());
break;
case COUCHDB_DELETEDOCUMENT:
reply = d->networkManager->deleteResource(*query->request());
break;
case COUCHDB_UPLOADATTACHMENT:
reply = d->networkManager->put(*query->request(), query->body());
break;
case COUCHDB_DELETEATTACHMENT:
reply = d->networkManager->deleteResource(*query->request());
break;
case COUCHDB_REPLICATEDATABASE:
reply = d->networkManager->post(*query->request(), query->body());
break;
}
if(query->operation() != COUCHDB_REPLICATEDATABASE)
{
connect(query, SIGNAL(timeout()), SLOT(queryTimeout()));
query->startTimeoutTimer();
}
connect(reply, SIGNAL(finished()), this, SLOT(queryFinished()));
d->currentQueries[reply] = query;
}
void CouchDB::queryFinished()
{
Q_D(CouchDB);
QNetworkReply* reply = qobject_cast<QNetworkReply*>(sender());
if(!reply) return;
QByteArray data;
CouchDBQuery *query = d->currentQueries[reply];
bool hasError = false;
if(reply->error() == QNetworkReply::NoError)
{
data = reply->readAll();
}
else
{
qWarning() << reply->errorString();
hasError = true;
}
CouchDBResponse response;
response.setQuery(query);
response.setData(data);
response.setStatus(hasError || (query->operation() != COUCHDB_CHECKINSTALLATION && query->operation() != COUCHDB_RETRIEVEDOCUMENT &&
!response.documentObj().value("ok").toBool()) ? COUCHDB_ERROR : COUCHDB_SUCCESS);
switch(query->operation())
{
case COUCHDB_CHECKINSTALLATION:
default:
if(!hasError) response.setStatus(response.documentObj().contains("couchdb") ? COUCHDB_SUCCESS : COUCHDB_ERROR);
emit installationChecked(response);
break;
case COUCHDB_STARTSESSION:
if(hasError && reply->error() >= 201 && reply->error() <= 299) response.setStatus(COUCHDB_AUTHERROR);
emit sessionStarted(response);
break;
case COUCHDB_ENDSESSION:
emit sessionEnded(response);
break;
case COUCHDB_LISTDATABASES:
emit databasesListed(response);
break;
case COUCHDB_CREATEDATABASE:
emit databaseCreated(response);
break;
case COUCHDB_DELETEDATABASE:
emit databaseDeleted(response);
break;
case COUCHDB_LISTDOCUMENTS:
emit documentsListed(response);
break;
case COUCHDB_RETRIEVEREVISION:
{
QString revision = reply->rawHeader("ETag");
revision.remove("\"");
response.setRevisionData(revision);
emit revisionRetrieved(response);
break;
}
case COUCHDB_RETRIEVEDOCUMENT:
emit documentRetrieved(response);
break;
case COUCHDB_UPDATEDOCUMENT:
emit documentUpdated(response);
break;
case COUCHDB_DELETEDOCUMENT:
emit documentDeleted(response);
break;
case COUCHDB_UPLOADATTACHMENT:
emit attachmentUploaded(response);
break;
case COUCHDB_DELETEATTACHMENT:
emit attachmentDeleted(response);
break;
case COUCHDB_REPLICATEDATABASE:
emit databaseReplicated(response);
break;
}
d->currentQueries.remove(reply);
reply->deleteLater();
delete query;
}
void CouchDB::queryTimeout()
{
CouchDBQuery *query = qobject_cast<CouchDBQuery*>(sender());
if(!query) return;
qWarning() << query->url() << "timed out. Retrying...";
executeQuery(query);
}
void CouchDB::checkInstallation()
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1").arg(d->server->baseURL()));
query->setOperation(COUCHDB_CHECKINSTALLATION);
executeQuery(query);
}
void CouchDB::startSession(const QString &username, const QString &password)
{
Q_D(CouchDB);
QUrlQuery postData;
postData.addQueryItem("name", username);
postData.addQueryItem("password", password);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/_session").arg(d->server->baseURL()));
query->setOperation(COUCHDB_STARTSESSION);
query->request()->setRawHeader("Accept", "application/json");
query->request()->setRawHeader("Content-Type", "application/x-www-form-urlencoded");
query->setBody(postData.toString(QUrl::FullyEncoded).toUtf8());
executeQuery(query);
}
void CouchDB::endSession()
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/_session").arg(d->server->baseURL()));
query->setOperation(COUCHDB_ENDSESSION);
executeQuery(query);
}
void CouchDB::listDatabases()
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/_all_dbs").arg(d->server->baseURL()));
query->setOperation(COUCHDB_LISTDATABASES);
executeQuery(query);
}
void CouchDB::createDatabase(const QString &database)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2").arg(d->server->baseURL(), database));
query->setOperation(COUCHDB_CREATEDATABASE);
query->setDatabase(database);
executeQuery(query);
}
void CouchDB::deleteDatabase(const QString &database)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2").arg(d->server->baseURL(), database));
query->setOperation(COUCHDB_DELETEDATABASE);
query->setDatabase(database);
executeQuery(query);
}
void CouchDB::listDocuments(const QString& database)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/_all_docs").arg(d->server->baseURL(), database));
query->setOperation(COUCHDB_LISTDOCUMENTS);
query->setDatabase(database);
executeQuery(query);
}
void CouchDB::retrieveRevision(const QString &database, const QString &id)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3").arg(d->server->baseURL(), database, id));
query->setOperation(COUCHDB_RETRIEVEREVISION);
query->setDatabase(database);
query->setDocumentID(id);
executeQuery(query);
}
void CouchDB::retrieveDocument(const QString &database, const QString &id)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3").arg(d->server->baseURL(), database, id));
query->setOperation(COUCHDB_RETRIEVEDOCUMENT);
query->setDatabase(database);
query->setDocumentID(id);
executeQuery(query);
}
void CouchDB::updateDocument(const QString &database, const QString &id, QByteArray document)
{
Q_D(CouchDB);
QByteArray postDataSize = QByteArray::number(document.size());
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3").arg(d->server->baseURL(), database, id));
query->setOperation(COUCHDB_UPDATEDOCUMENT);
query->setDatabase(database);
query->setDocumentID(id);
query->request()->setRawHeader("Accept", "application/json");
query->request()->setRawHeader("Content-Type", "application/json");
query->request()->setRawHeader("Content-Length", postDataSize);
query->setBody(document);
executeQuery(query);
}
void CouchDB::deleteDocument(const QString &database, const QString &id, const QString &revision)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3?rev=%4").arg(d->server->baseURL(), database, id, revision));
query->setOperation(COUCHDB_DELETEDOCUMENT);
query->setDatabase(database);
query->setDocumentID(id);
executeQuery(query);
}
void CouchDB::uploadAttachment(const QString &database, const QString &id, const QString& attachmentName,
QByteArray attachment, QString mimeType, const QString& revision)
{
Q_D(CouchDB);
QByteArray postDataSize = QByteArray::number(attachment.size());
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3/%4?rev=%5").arg(d->server->baseURL(), database, id, attachmentName, revision));
query->setOperation(COUCHDB_DELETEDOCUMENT);
query->setDatabase(database);
query->setDocumentID(id);
query->request()->setRawHeader("Content-Type", mimeType.toLatin1());
query->request()->setRawHeader("Content-Length", postDataSize);
query->setBody(attachment);
executeQuery(query);
}
void CouchDB::deleteAttachment(const QString &database, const QString &id, const QString &attachmentName, const QString &revision)
{
Q_D(CouchDB);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/%2/%3/%4?rev=%5").arg(d->server->baseURL(), database, id, attachmentName, revision));
query->setOperation(COUCHDB_DELETEATTACHMENT);
query->setDatabase(database);
query->setDocumentID(id);
executeQuery(query);
}
void CouchDB::replicateDatabaseFrom(CouchDBServer *sourceServer, const QString& sourceDatabase, const QString& targetDatabase,
const bool& createTarget, const bool& continuous, const bool& cancel)
{
Q_D(CouchDB);
QString source = QString("%1/%2").arg(sourceServer->baseURL(true), sourceDatabase);
QString target = d->server->url().contains("localhost") ? targetDatabase : QString("%1/%2").arg(d->server->baseURL(true), targetDatabase);
replicateDatabase(source, target, targetDatabase, createTarget, continuous, cancel);
}
void CouchDB::replicateDatabaseTo(CouchDBServer *targetServer, const QString& sourceDatabase, const QString& targetDatabase,
const bool& createTarget, const bool& continuous, const bool& cancel)
{
Q_D(CouchDB);
QString source = d->server->url().contains("localhost") ? sourceDatabase : QString("%1/%2").arg(d->server->baseURL(true), sourceDatabase);
QString target = QString("%1/%2").arg(targetServer->baseURL(true), targetDatabase);
replicateDatabase(source, target, targetDatabase, createTarget, continuous, cancel);
}
void CouchDB::replicateDatabase(const QString &source, const QString &target, const QString& database, const bool &createTarget,
const bool &continuous, const bool &cancel)
{
Q_D(CouchDB);
if(!cancel) qDebug() << "Starting replication from" << source << "to" << target;
else qDebug() << "Cancelling replication from" << source << "to" << target;
QJsonObject object;
object.insert("source", source);
object.insert("target", target);
object.insert("create_target", createTarget);
object.insert("continuous", continuous);
object.insert("cancel", cancel);
QJsonDocument document(object);
CouchDBQuery *query = new CouchDBQuery(d->server, this);
query->setUrl(QString("%1/_replicate").arg(d->server->baseURL(true)));
query->setOperation(COUCHDB_REPLICATEDATABASE);
query->setDatabase(database);
query->request()->setRawHeader("Accept", "application/json");
query->request()->setRawHeader("Content-Type", "application/json");
query->setBody(document.toJson());
executeQuery(query);
}
CouchDBListener* CouchDB::createListener(const QString &database, const QString &documentID)
{
Q_D(CouchDB);
CouchDBListener *listener = new CouchDBListener(d->server);
listener->setCookieJar(d->networkManager->cookieJar());
d->networkManager->cookieJar()->setParent(0);
listener->setDatabase(database);
listener->setDocumentID(documentID);
listener->launch();
qDebug() << "Created listener for database:" << database << ", document:" << documentID;
return listener;
}