cutelyst 3.9.1
A C++ Web Framework built on top of Qt, using the simple approach of Catalyst (Perl) framework.
Cutelyst::Response Class Referencefinal
Inheritance diagram for Cutelyst::Response:

Public Types

enum  CloseCode {
  CloseCodeNormal , CloseCodeGoingAway , CloseCodeProtocolError , CloseCodeDatatypeNotSupported ,
  CloseCodeReserved1004 , CloseCodeMissingStatusCode , CloseCodeAbnormalDisconnection , CloseCodeWrongDatatype ,
  CloseCodePolicyViolated , CloseCodeTooMuchData , CloseCodeMissingExtension , CloseCodeBadOperation ,
  CloseCodeTlsHandshakeFailed
}
enum  HttpStatus {
  Continue , SwitchingProtocols , OK , Created ,
  Accepted , NonAuthoritativeInformation , NoContent , ResetContent ,
  PartialContent , MultiStatus , MultipleChoices , MovedPermanently ,
  Found , SeeOther , NotModified , UseProxy ,
  TemporaryRedirect , PermanentRedirect , BadRequest , Unauthorized ,
  PaymentRequired , Forbidden , NotFound , MethodNotAllowed ,
  NotAcceptable , ProxyAuthenticationRequired , RequestTimeout , Conflict ,
  Gone , LengthRequired , PreconditionFailed , RequestEntityTooLarge ,
  RequestURITooLong , UnsupportedMediaType , RequestedRangeNotSatisfiable , ExpectationFailed ,
  InternalServerError , NotImplemented , BadGateway , ServiceUnavailable ,
  GatewayTimeout , HTTPVersionNotSupported , BandwidthLimitExceeded
}
Public Types inherited from QIODevice
enum  OpenModeFlag

Public Member Functions

Q_REQUIRED_RESULT QByteArraybody ()
QIODevicebodyDevice () const
QString contentEncoding () const
qint64 contentLength () const
QString contentType () const
QString contentTypeCharset () const
QVariant cookie (const QByteArray &name) const
QList< QNetworkCookiecookies () const
bool hasBody () const noexcept
QString header (const QString &field) const
Headersheaders () noexcept
bool isFinalizedHeaders () const noexcept
virtual bool isSequential () const noexcept override
QUrl location () const noexcept
void redirect (const QString &url, quint16 status=Found)
void redirect (const QUrl &url, quint16 status=Found)
void redirectSafe (const QUrl &url, const QUrl &fallback)
int removeCookies (const QByteArray &name)
void setBody (const QByteArray &body)
void setBody (const QString &body)
void setBody (QIODevice *body)
void setBody (QStringView body)
void setContentEncoding (const QString &encoding)
void setContentLength (qint64 length)
void setContentType (const QString &type)
void setCookie (const QNetworkCookie &cookie)
void setCookies (const QList< QNetworkCookie > &cookies)
void setHeader (const QString &field, const QString &value)
void setJsonArrayBody (const QJsonArray &array)
void setJsonBody (const QByteArray &json)
void setJsonBody (const QJsonDocument &documment)
void setJsonBody (const QString &json)
void setJsonBody (QStringView json)
void setJsonObjectBody (const QJsonObject &object)
void setStatus (quint16 status) noexcept
virtual qint64 size () const noexcept override
quint16 status () const noexcept
bool webSocketBinaryMessage (const QByteArray &message)
 Sends a WebSocket binary message.
bool webSocketClose (quint16 code=Response::CloseCodeNormal, const QString &reason={})
 Sends a WebSocket close frame, with both optional close code and a string reason.
bool webSocketHandshake (const QString &key={}, const QString &origin={}, const QString &protocol={})
 Sends the websocket handshake, if no parameters are defined it will use header data.
bool webSocketPing (const QByteArray &payload={})
 Sends a WebSocket ping with an optional payload limited to 125 bytes, which will be truncated if larger.
bool webSocketTextMessage (const QString &message)
 Sends a WebSocket text message.
Public Member Functions inherited from QIODevice
 QIODevice (QObject *parent)
void aboutToClose ()
virtual bool atEnd () const const
virtual qint64 bytesAvailable () const const
virtual qint64 bytesToWrite () const const
void bytesWritten (qint64 bytes)
virtual bool canReadLine () const const
void channelBytesWritten (int channel, qint64 bytes)
void channelReadyRead (int channel)
virtual void close ()
void commitTransaction ()
int currentReadChannel () const const
int currentWriteChannel () const const
QString errorString () const const
bool getChar (char *c)
bool isOpen () const const
bool isReadable () const const
bool isTextModeEnabled () const const
bool isTransactionStarted () const const
bool isWritable () const const
virtual bool open (OpenMode mode)
OpenMode openMode () const const
qint64 peek (char *data, qint64 maxSize)
QByteArray peek (qint64 maxSize)
virtual qint64 pos () const const
bool putChar (char c)
qint64 read (char *data, qint64 maxSize)
QByteArray read (qint64 maxSize)
QByteArray readAll ()
int readChannelCount () const const
void readChannelFinished ()
qint64 readLine (char *data, qint64 maxSize)
QByteArray readLine (qint64 maxSize)
void readyRead ()
virtual bool reset ()
void rollbackTransaction ()
virtual bool seek (qint64 pos)
void setCurrentReadChannel (int channel)
void setCurrentWriteChannel (int channel)
void setTextModeEnabled (bool enabled)
qint64 skip (qint64 maxSize)
void startTransaction ()
void ungetChar (char c)
virtual bool waitForBytesWritten (int msecs)
virtual bool waitForReadyRead (int msecs)
qint64 write (const char *data)
qint64 write (const char *data, qint64 maxSize)
qint64 write (const QByteArray &byteArray)
int writeChannelCount () const const
Public Member Functions inherited from QObject
 QObject (QObject *parent)
bool blockSignals (bool block)
const QObjectListchildren () const const
QMetaObject::Connection connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const const
void deleteLater ()
void destroyed (QObject *obj)
bool disconnect (const char *signal, const QObject *receiver, const char *method) const const
bool disconnect (const QObject *receiver, const char *method) const const
void dumpObjectInfo ()
void dumpObjectInfo () const const
void dumpObjectTree ()
void dumpObjectTree () const const
QList< QByteArraydynamicPropertyNames () const const
virtual bool event (QEvent *e)
virtual bool eventFilter (QObject *watched, QEvent *event)
findChild (const QString &name, Qt::FindChildOptions options) const const
QList< T > findChildren (const QRegExp &regExp, Qt::FindChildOptions options) const const
QList< T > findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const
QList< T > findChildren (const QString &name, Qt::FindChildOptions options) const const
bool inherits (const char *className) const const
void installEventFilter (QObject *filterObj)
bool isWidgetType () const const
bool isWindowType () const const
void killTimer (int id)
virtual const QMetaObjectmetaObject () const const
void moveToThread (QThread *targetThread)
QString objectName () const const
void objectNameChanged (const QString &objectName, QPrivateSignal)
QObjectparent () const const
QVariant property (const char *name) const const
 Q_CLASSINFO (Name, Value)
 Q_DISABLE_COPY (Class)
 Q_DISABLE_COPY_MOVE (Class)
 Q_DISABLE_MOVE (Class)
 Q_EMIT Q_EMIT
 Q_ENUM (...)
 Q_ENUM_NS (...)
 Q_ENUMS (...)
 Q_FLAG (...)
 Q_FLAG_NS (...)
 Q_FLAGS (...)
 Q_GADGET Q_GADGET
 Q_INTERFACES (...)
 Q_INVOKABLE Q_INVOKABLE
 Q_NAMESPACE Q_NAMESPACE
 Q_NAMESPACE_EXPORT (EXPORT_MACRO)
 Q_OBJECT Q_OBJECT
 Q_PROPERTY (...)
 Q_REVISION Q_REVISION
 Q_SET_OBJECT_NAME (Object)
 Q_SIGNAL Q_SIGNAL
 Q_SIGNALS Q_SIGNALS
 Q_SLOT Q_SLOT
 Q_SLOTS Q_SLOTS
qFindChild (const QObject *obj, const QString &name)
QList< T > qFindChildren (const QObject *obj, const QRegExp &regExp)
QList< T > qFindChildren (const QObject *obj, const QString &name)
qobject_cast (const QObject *object)
qobject_cast (QObject *object)
 QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT
void removeEventFilter (QObject *obj)
void setObjectName (const QString &name)
void setParent (QObject *parent)
bool setProperty (const char *name, const QVariant &value)
bool signalsBlocked () const const
int startTimer (int interval, Qt::TimerType timerType)
int startTimer (std::chrono::milliseconds time, Qt::TimerType timerType)
QThreadthread () const const

Protected Member Functions

 Response (const Headers &defaultHeaders, EngineRequest *conn=nullptr)
virtual qint64 readData (char *data, qint64 maxlen) override
virtual qint64 writeData (const char *data, qint64 len) override
Protected Member Functions inherited from QIODevice
virtual qint64 readLineData (char *data, qint64 maxSize)
void setErrorString (const QString &str)
void setOpenMode (OpenMode openMode)
Protected Member Functions inherited from QObject
virtual void childEvent (QChildEvent *event)
virtual void connectNotify (const QMetaMethod &signal)
virtual void customEvent (QEvent *event)
virtual void disconnectNotify (const QMetaMethod &signal)
bool isSignalConnected (const QMetaMethod &signal) const const
int receivers (const char *signal) const const
QObjectsender () const const
int senderSignalIndex () const const
virtual void timerEvent (QTimerEvent *event)

Friends

class Application
class Context
class ContextPrivate
class Engine
class EngineConnection

Additional Inherited Members

Static Public Member Functions inherited from QObject
QMetaObject::Connection connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
QMetaObject::Connection connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, const QObject *context, Functor functor, Qt::ConnectionType type)
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
QMetaObject::Connection connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)
bool disconnect (const QMetaObject::Connection &connection)
bool disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
bool disconnect (const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method)
QString tr (const char *sourceText, const char *disambiguation, int n)
QString trUtf8 (const char *sourceText, const char *disambiguation, int n)
Public Attributes inherited from QIODevice
 Append
 ExistingOnly
 NewOnly
 NotOpen
typedef OpenMode
 ReadOnly
 ReadWrite
 Text
 Truncate
 Unbuffered
 WriteOnly
Public Attributes inherited from QObject
typedef QObjectList
Properties inherited from QObject
 objectName

Detailed Description

Definition at line 24 of file response.h.

Member Enumeration Documentation

◆ CloseCode

This enum type specifies the status response to be sent to the client

Definition at line 78 of file response.h.

◆ HttpStatus

This enum type specifies the status response to be sent to the client

Definition at line 30 of file response.h.

Constructor & Destructor Documentation

◆ ~Response()

Response::~Response ( )
overridevirtual

Definition at line 58 of file response.cpp.

◆ Response()

Member Function Documentation

◆ body()

QByteArray & Response::body ( )

This function returns a reference to a QByteArray which implicity sets the body device to a QBuffer, even if one was already set.

Definition at line 83 of file response.cpp.

References Response().

Referenced by Cutelyst::EngineRequest::finalizeBody(), setBody(), setBody(), setJsonArrayBody(), setJsonBody(), and setJsonObjectBody().

◆ bodyDevice()

QIODevice * Response::bodyDevice ( ) const

Returns the body IO device (if any) of this response.

Definition at line 94 of file response.cpp.

References QIODevice::QIODevice(), and Response().

Referenced by Cutelyst::EngineRequest::finalizeBody().

◆ contentEncoding()

QString Response::contentEncoding ( ) const

Short for headers().contentEncoding();

Definition at line 158 of file response.cpp.

References Response().

◆ contentLength()

qint64 Response::contentLength ( ) const

Short for headers().contentLength();

Definition at line 175 of file response.cpp.

References Response().

◆ contentType()

QString Response::contentType ( ) const

Short for headers().contentType();

Definition at line 192 of file response.cpp.

References Response().

Referenced by Cutelyst::RenderView::doExecute().

◆ contentTypeCharset()

QString Response::contentTypeCharset ( ) const

Short for headers().contentTypeCharset();

Definition at line 198 of file response.cpp.

References Response().

◆ cookie()

QVariant Response::cookie ( const QByteArray & name) const

Returns the first QNetworkCookie matching the name or a null QVariant if not found

Definition at line 204 of file response.cpp.

References Response(), and QVariant::fromValue().

Referenced by setCookie(), and setCookies().

◆ cookies()

QList< QNetworkCookie > Response::cookies ( ) const

Returns a list of all cookies set

Definition at line 218 of file response.cpp.

References Response().

Referenced by Cutelyst::EngineRequest::finalizeCookies(), and setCookies().

◆ hasBody()

bool Response::hasBody ( ) const
noexcept

Returns true if a body device has been defined as QByteArray or QIODevice or write() was called and it's on chunked mode

Definition at line 76 of file response.cpp.

References Response().

Referenced by Cutelyst::RenderView::doExecute().

◆ header()

QString Response::header ( const QString & field) const

Shortcut headers().header()

Definition at line 322 of file response.cpp.

◆ headers()

Headers & Response::headers ( )
noexcept

Returns a reference to the response headers class

Definition at line 339 of file response.cpp.

References Response().

Referenced by Cutelyst::EngineRequest::finalizeCookies(), Cutelyst::EngineRequest::finalizeHeaders(), and setContentType().

◆ isFinalizedHeaders()

bool Response::isFinalizedHeaders ( ) const
noexcept

Returns if Headers are finalized (sent to the client)

Definition at line 345 of file response.cpp.

◆ isSequential()

bool Response::isSequential ( ) const
overridevirtualnoexcept

Writing to user-agent is always sequential

Reimplemented from QIODevice.

Definition at line 351 of file response.cpp.

◆ location()

QUrl Response::location ( ) const
noexcept

Returns the HTTP location set by the redirect

Definition at line 316 of file response.cpp.

References Response(), QUrl::RemovePath, and QUrl::RemoveQuery.

Referenced by redirect().

◆ readData()

qint64 Response::readData ( char * data,
qint64 maxlen )
overrideprotectedvirtual

Reimplemented from QIODevice::readData().

Implements QIODevice.

Definition at line 23 of file response.cpp.

◆ redirect() [1/2]

void Response::redirect ( const QString & url,
quint16 status = Found )

Causes the response to redirect to the specified URL. The default status is 302. This is a convenience method that sets the Location header to the redirect destination, and then sets the response status. You will want to return false or c->detach() to interrupt the normal processing flow if you want the redirect to occur straight away.

Note
do not give a relative URL as $url, i.e: one that is not fully qualified ("http://...", etc.) or that starts with a slash "/path/here". While it may work, it is not guaranteed to do the right thing and is not a standard behaviour. You may opt to use uriFor() or uriForAction() instead.

Definition at line 300 of file response.cpp.

◆ redirect() [2/2]

void Response::redirect ( const QUrl & url,
quint16 status = Found )

Causes the response to redirect to the specified URL. The default status is 302. This is a convenience method that sets the Location header to the redirect destination, and then sets the response status. You will want to return false or c->detach() to interrupt the normal processing flow if you want the redirect to occur straight away.

Note
do not give a relative URL as $url, i.e: one that is not fully qualified ("http://...", etc.) or that starts with a slash "/path/here". While it may work, it is not guaranteed to do the right thing and is not a standard behaviour. You may opt to use uriFor() or uriForAction() instead.

Definition at line 278 of file response.cpp.

References Response(), QString::fromLatin1(), QUrl::FullyEncoded, QUrl::isValid(), location(), status(), and QUrl::toEncoded().

Referenced by Cutelyst::LangSelect::fromPath().

◆ redirectSafe()

void Response::redirectSafe ( const QUrl & url,
const QUrl & fallback )

Open Redirect Vulnerability is when you get an user provided URL and redirect to it without checking if it's safe.

This can be used on login forms that receive some "redir" parameter that once logged in allows the user to go straight to that page instead of some home page.

It's then possible to receive a link like http://example.com/login?redir=http://exemple.com/login notice how both domain names are similar for malicious porpuses, once logged in it redirects to a similar login page that will pretent the auth didn't work, user might then type their credentials on that page.

This method validades that the url scheme, domain name and port are the same of the request to your server if it isn't it will send the user to fallback url that you know it's safe. If you need to redirect the user to some other domain/port validate the URL manually an use the regular

See also
redirect method instead.

Definition at line 305 of file response.cpp.

References status().

◆ removeCookies()

int Response::removeCookies ( const QByteArray & name)

Removes all cookies that matches name, returning the number of cookies removed

Definition at line 264 of file response.cpp.

References Response().

◆ setBody() [1/4]

void Response::setBody ( const QByteArray & body)

Sets a QByteArray as the response body, content length will be automatically set to it's size.

Definition at line 114 of file response.cpp.

References Response(), and body().

◆ setBody() [2/4]

void Cutelyst::Response::setBody ( const QString & body)
inline

Sets a QString as the response body, the output will be UTF-8 and content length will be automatically set to it's size.

Definition at line 458 of file response.h.

References setBody(), and QString::toUtf8().

◆ setBody() [3/4]

void Response::setBody ( QIODevice * body)

Sets an IO device as the response body, the open mode must be at least QIODevice::ReadOnly. This function takes ownership of your device deleting after the request has completed

Definition at line 100 of file response.cpp.

References QIODevice::QIODevice(), Response(), and body().

Referenced by Cutelyst::EngineRequest::finalizeError(), Cutelyst::CuteleeView::render(), Cutelyst::GrantleeView::render(), setBody(), and setBody().

◆ setBody() [4/4]

void Cutelyst::Response::setBody ( QStringView body)
inline

Sets a QString as the response body, the output will be UTF-8 and content length will be automatically set to it's size.

Definition at line 463 of file response.h.

References setBody(), and QStringView::toUtf8().

◆ setContentEncoding()

void Cutelyst::Response::setContentEncoding ( const QString & encoding)

Short for headers().setContentEncoding(encoding);

Definition at line 164 of file response.cpp.

References Response().

◆ setContentLength()

void Response::setContentLength ( qint64 length)

Short for headers().setContentLength(length);

Definition at line 181 of file response.cpp.

References Response().

◆ setContentType()

void Cutelyst::Response::setContentType ( const QString & type)
inline

◆ setCookie()

void Response::setCookie ( const QNetworkCookie & cookie)

Defines a QNetworkCookie to be sent to the user-agent, if a previous cookie->name() was set it will be replaced

Definition at line 232 of file response.cpp.

References Response(), and cookie().

◆ setCookies()

void Response::setCookies ( const QList< QNetworkCookie > & cookies)

Defines a list of QNetworkCookie to be sent to the user-agent, all previous matches to cookie->name() will be preserved.

Definition at line 246 of file response.cpp.

References Response(), cookie(), and cookies().

◆ setHeader()

void Response::setHeader ( const QString & field,
const QString & value )

Shortcut headers().setHeader()

Definition at line 328 of file response.cpp.

Referenced by Cutelyst::ViewJson::render().

◆ setJsonArrayBody()

void Response::setJsonArrayBody ( const QJsonArray & array)

Sets a QJsonArray on a QJsonDocument as the response body, using toJson(QJsonDocument::Compact) output and setting content-type to application/json.

Definition at line 150 of file response.cpp.

References Response(), body(), QJsonDocument::Compact, and QJsonDocument::toJson().

◆ setJsonBody() [1/4]

void Response::setJsonBody ( const QByteArray & json)

Sets a JSON string as the response body, this method is provided for convenience as it sets the content-type to application/json.

Definition at line 135 of file response.cpp.

References Response().

◆ setJsonBody() [2/4]

void Response::setJsonBody ( const QJsonDocument & documment)

Sets a QJsonDocument as the response body, using toJson(QJsonDocument::Compact) output and setting content-type to application/json.

Definition at line 120 of file response.cpp.

References Response(), body(), QJsonDocument::Compact, and QJsonDocument::toJson().

Referenced by setJsonBody().

◆ setJsonBody() [3/4]

void Response::setJsonBody ( const QString & json)

Sets a JSON string as the response body, this method is provided for convenience as it sets the content-type to application/json.

Definition at line 128 of file response.cpp.

References Response(), and QString::toUtf8().

◆ setJsonBody() [4/4]

void Cutelyst::Response::setJsonBody ( QStringView json)
inline

Sets a JSON string as the response body, this method is provided for convenience as it sets the content-type to application/json.

Definition at line 468 of file response.h.

References setJsonBody(), and QStringView::toUtf8().

◆ setJsonObjectBody()

void Response::setJsonObjectBody ( const QJsonObject & object)

Sets a QJsonObject on a QJsonDocument as the response body, using toJson(QJsonDocument::Compact) output and setting content-type to application/json.

Definition at line 142 of file response.cpp.

References Response(), body(), QJsonDocument::Compact, and QJsonDocument::toJson().

◆ setStatus()

void Response::setStatus ( quint16 status)
noexcept

Sets the response code status

Definition at line 70 of file response.cpp.

References Response(), and status().

Referenced by Cutelyst::RenderView::doExecute(), and Cutelyst::EngineRequest::finalizeError().

◆ size()

qint64 Response::size ( ) const
overridevirtualnoexcept

Reimplemented from QIODevice::readData().

Reimplemented from QIODevice.

Definition at line 356 of file response.cpp.

References Response().

Referenced by Cutelyst::EngineRequest::finalizeHeaders().

◆ status()

quint16 Response::status ( ) const
noexcept

The current response code status

Definition at line 64 of file response.cpp.

References Response().

Referenced by Cutelyst::RenderView::doExecute(), Cutelyst::EngineRequest::finalizeHeaders(), redirect(), redirectSafe(), and setStatus().

◆ webSocketBinaryMessage()

bool Response::webSocketBinaryMessage ( const QByteArray & message)

Definition at line 382 of file response.cpp.

◆ webSocketClose()

bool Response::webSocketClose ( quint16 code = Response::CloseCodeNormal,
const QString & reason = {} )
Note
This method does not emit Request::webSocketClosed() signal. If you need to track when the connection was closed, the proper way is to rely on Context::destroyed() signal.

Definition at line 394 of file response.cpp.

◆ webSocketHandshake()

bool Response::webSocketHandshake ( const QString & key = {},
const QString & origin = {},
const QString & protocol = {} )

Returns true in case of success, false otherwise, which can be due missing support on the engine or missing the appropriate headers.

Note
Most WebSockets client doesn't handle when a call to a WebSocket endpoint ends on an HTTP authentication failure or other HTTP status that is not the update. Due that it's best to always do the proper websocket handshake and then
See also
webSocketClose() the connection, with some meaning reason.

Definition at line 368 of file response.cpp.

◆ webSocketPing()

bool Response::webSocketPing ( const QByteArray & payload = {})
Note
Some front-end servers will close the conetion if no activity is seem, NGINX closes in 60 seconds by default, in order to avoid that, sending a ping is the best to way to keep the connection alive and to know that your client is still there.

Definition at line 388 of file response.cpp.

◆ webSocketTextMessage()

bool Response::webSocketTextMessage ( const QString & message)

Definition at line 376 of file response.cpp.

References Response().

◆ writeData()

qint64 Response::writeData ( const char * data,
qint64 len )
overrideprotectedvirtual

Writes data to the response body, this will flush all response headers first and will enter in chunked mode if Transfer-Encoding header is set to chunked or if no content length is set and status is not 1xx or 204 (NoContent) or 304 (NotModified)

Implements QIODevice.

Definition at line 30 of file response.cpp.

References Response().

◆ Application

friend class Application
friend

Definition at line 451 of file response.h.

◆ Context

friend class Context
friend

Definition at line 454 of file response.h.

◆ ContextPrivate

friend class ContextPrivate
friend

Definition at line 455 of file response.h.

◆ Engine

friend class Engine
friend

Definition at line 452 of file response.h.

◆ EngineConnection

friend class EngineConnection
friend

Definition at line 453 of file response.h.