QAbstractHttpServer Class

Member Function Documentation

[explicit] QAbstractHttpServer::QAbstractHttpServer(QObject *parent = nullptr)

Creates an instance of QAbstractHttpServer with the parent parent.

[override virtual noexcept] QAbstractHttpServer::~QAbstractHttpServer()

Destroys an instance of QAbstractHttpServer.

[since 6.8] template <typename Handler, QAbstractHttpServer::if_compatible_callable<Handler> = true> void QAbstractHttpServer::addWebSocketUpgradeVerifier(const typename QtPrivate::ContextTypeForFunctor<Handler>::ContextType *context, Handler &&func)

Adds a callback function func that verifies incoming WebSocket upgrades using the context object context. Upgrade attempts succeed if at least one of the registered callback functions returns Accept and a handler returning Deny has not been executed before it. If no handlers are registered or all return PassToNext, missingHandler() is called. The callback functions are executed in the order they are registered. The callbacks cannot call addWebSocketUpgradeVerifier().

 server.addWebSocketUpgradeVerifier(
         &server, [](const QHttpServerRequest &request) {
             if (request.url().path() == "/allowed"_L1)
                 return QHttpServerWebSocketUpgradeResponse::accept();
             else
                 return QHttpServerWebSocketUpgradeResponse::passToNext();
         });

This function was introduced in Qt 6.8.

See also QHttpServerRequest, QHttpServerWebSocketUpgradeResponse, hasPendingWebSocketConnections(), nextPendingWebSocketConnection(), newWebSocketConnection(), and missingHandler().

bool QAbstractHttpServer::bind(QLocalServer *server)

Bind the HTTP server to given QLocalServer server over which the transmission happens. It is possible to call this function multiple times with different instances of server to handle multiple connections.

After calling this function, every _new_ connection will be handled and forwarded by the HTTP server.

It is the user's responsibility to call QLocalServer::listen() on the server before calling this function. If server is not listening, nothing will happen and false will be returned.

If the server is nullptr false is returned.

If successful the server will be parented to this HTTP server and true is returned.

See also QLocalServer and QLocalServer::listen().

bool QAbstractHttpServer::bind(QTcpServer *server)

Bind the HTTP server to given TCP server over which the transmission happens. It is possible to call this function multiple times with different instances of TCP server to handle multiple connections and ports, for example both SSL and non-encrypted connections.

After calling this function, every _new_ connection will be handled and forwarded by the HTTP server.

It is the user's responsibility to call QTcpServer::listen() on the server before calling this function. If server is not listening, nothing will happen and false will be returned.

If successful the server will be parented to this HTTP server and true is returned.

To allow usage of HTTP 2, bind to a QSslServer where QSslConfiguration::setAllowedNextProtocols() has been called with the arguments { QSslConfiguration::ALPNProtocolHTTP2 }.

See also QTcpServer, QTcpServer::listen(), and QSslConfiguration::setAllowedNextProtocols().

[pure virtual protected] bool QAbstractHttpServer::handleRequest(const QHttpServerRequest &request, QHttpServerResponder &responder)

Override this function to handle each incoming request, by examining the request and sending the appropriate response back to responder. Return true if the request was handled successfully. If this method returns false, missingHandler() will be called afterwards.

This function must move out of responder before returning true.

bool QAbstractHttpServer::hasPendingWebSocketConnections() const

Returns true if the server has pending WebSocket connections; otherwise returns false.

See also newWebSocketConnection(), nextPendingWebSocketConnection(), and addWebSocketUpgradeVerifier().

[since 6.8] QHttp2Configuration QAbstractHttpServer::http2Configuration() const

Returns server's HTTP/2 configuration parameters.

This function was introduced in Qt 6.8.

See also setHttp2Configuration().

QList<QLocalServer *> QAbstractHttpServer::localServers() const

Returns the local servers of this HTTP server.

See also serverPorts().

[pure virtual protected] void QAbstractHttpServer::missingHandler(const QHttpServerRequest &request, QHttpServerResponder &responder)

Override this function to handle each incoming request that was not handled by handleRequest(). This function is called whenever handleRequest() returns false, or if there is a WebSocket upgrade attempt and either there are no connections to newWebSocketConnection() or there are no matching WebSocket verifiers. The request and responder parameters are the same as handleRequest() was called with.

See also handleRequest() and addWebSocketUpgradeVerifier().

[signal] void QAbstractHttpServer::newWebSocketConnection()

This signal is emitted every time a new WebSocket connection is available.

See also hasPendingWebSocketConnections(), nextPendingWebSocketConnection(), and addWebSocketUpgradeVerifier().

std::unique_ptr<QWebSocket> QAbstractHttpServer::nextPendingWebSocketConnection()

Returns the next pending connection as a connected QWebSocket object. nullptr is returned if this function is called when there are no pending connections.

See also newWebSocketConnection(), hasPendingWebSocketConnections(), and addWebSocketUpgradeVerifier().

QList<quint16> QAbstractHttpServer::serverPorts() const

Returns the list of ports this instance of QAbstractHttpServer is listening to.

This function has the same guarantee as QObject::children, the latest server added is the last entry in the vector.

See also servers().

QList<QTcpServer *> QAbstractHttpServer::servers() const

Returns the TCP servers of this HTTP server.

See also serverPorts().

[since 6.8] void QAbstractHttpServer::setHttp2Configuration(const QHttp2Configuration &configuration)

Sets server's HTTP/2 configuration parameters.

The next HTTP/2 connection will use the given configuration.

This function was introduced in Qt 6.8.

See also http2Configuration().