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Diffstat (limited to 'kpf/src/WebServer.h')
| -rw-r--r-- | kpf/src/WebServer.h | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/kpf/src/WebServer.h b/kpf/src/WebServer.h new file mode 100644 index 00000000..ae9d9383 --- /dev/null +++ b/kpf/src/WebServer.h @@ -0,0 +1,346 @@ +/* + KPF - Public fileserver for KDE + + Copyright 2001 Rik Hemsley (rikkus) <[email protected]> + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to + deal in the Software without restriction, including without limitation the + rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + sell copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +*/ + +#ifndef KPF_WEB_SERVER_H +#define KPF_WEB_SERVER_H + +#include <dcopobject.h> +#include <qserversocket.h> + +#include "Defaults.h" +#include "Request.h" +#include "Response.h" + +namespace KPF +{ + class Server; + + /** + * Listens on a port for incoming connections. + * Creates and manages Server objects. + * Manages bandwidth limit, dealing out bandwidth to Server objects. + * Maintains concurrent connection limit, using a backlog to queue incoming + * connections which cannot be served immediately. + */ + class WebServer : public QObject, virtual public DCOPObject + { + K_DCOP + Q_OBJECT + + public: + + /** + * Only root dir specified - this causes an immediate loadConfig. + * + * @param root Virtual root directory for servers. Passed to all created + * Server objects, which much ensure that only files from the root and + * its child directories are served. + */ + WebServer(const QString & root); + + /** + * @param root Virtual root directory for servers. Passed to all created + * Server objects, which much ensure that only files from the root and + * its child directories are served. + */ + WebServer + ( + const QString & root, + uint listenPort, + uint bandwidthLimit, + uint connectionLimit, + bool followSymlinks, + const QString & serverName + ); + + virtual ~WebServer(); + + /** + * Load the configuration, but do not kill existing connections even if + * listen port is changed. Do not change listen port yet - only when + * asked to restart. + */ + void loadConfig(); + + k_dcop: + + /** + * @return virtual root. + */ + QString root(); + + /** + * @return server name + */ + QString serverName(); + + /** + * @return amount of bytes that may be sent out per second, in total + * (adding the output of all contained Server objects.) + */ + ulong bandwidthLimit(); + + /** + * @return number of concurrent connections that will be served (by + * creating Server objects. More connections may wait in a backlog.) + */ + uint connectionLimit(); + + /** + * @return port on which to listen for incoming connections. + */ + uint listenPort(); + + /** + * @return true if requests may include symbolic links in their path. + */ + bool followSymlinks(); + + /** + * @return true if custom error messages (set by the user) should be + * sent. + */ + bool customErrorMessages(); + + /** + * Set the maximum amount of bytes that may be sent out per second, in + * total (adding the output of all contained Server objects.) + */ + void setBandwidthLimit (ulong); + + /** + * Set the number of concurrent connections that will be served (by + * creating Server objects. More connections may wait in a backlog.) + */ + void setConnectionLimit (uint); + + /** + * Set the port on which to listen for incoming connections. Does not + * take effect until restart() is called. + */ + void setListenPort (uint); + + /** + * Set server name + */ + void setServerName (const QString&); + + /** + * Set whether requests may include symbolic links in their path. + */ + void setFollowSymlinks (bool); + + /** + * Set whether custom error messages (set by the user) should be + * sent. + */ + void setCustomErrorMessages (bool); + + /** + * Convenience method for setting many attributes at once. + */ + void set + ( + uint listenPort, + ulong bandwidthLimit, + uint connectionLimit, + bool followSymlinks, + const QString& serverName + ); + + /** + * Kill all connections, stop listening on port, and start listening on + * (possibly different) port. + */ + void restart(); + + /** + * Start / stop accepting new connections. + */ + void pause(bool); + + /** + * @return true if no new connections are accepted. + */ + bool paused(); + + /** + * @return true if this WebServer is unable to listen on the requested + * port. + */ + bool portContention(); + + /** + * @return number of Server objects serving requests. + */ + uint connectionCount(); + + protected slots: + + /** + * Called repeatedly by a timer when this WebServer is in contention for + * its listen port. + */ + void slotBind (); + + /** + * Called by contained socket object when a new incoming connection is + * made. + */ + void slotConnection (int); + + /** + * Called by a Server when it has finished all transactions and is ready + * to die. + */ + void slotFinished (Server *); + + /** + * Called by a Server when it has sent data to the remote client. + */ + void slotOutput (Server *, ulong); + + /** + * Called by a Server when it wishes to send data to the remote client. + */ + void slotReadyToWrite (Server *); + + /** + * Called regularly by a timer to start output allocation (to Server + * objects.) + */ + void slotWrite (); + + /** + * Called regularly by a timer to check output for current time slice. + */ + void slotCheckOutput (); + + /** + * Called regularly by a timer to handle connections queued in the + * backlog. + */ + void slotClearBacklog (); + + /** + * Called when this succesfully publishes via zeroconf, or there was an + * error doing so. + */ + void wasPublished(bool ok); + + protected: + + /** + * Attempt to create a Server to handle a new connection. + * @param fd file descriptor. + */ + bool handleConnection(int fd); + + void saveConfig(); + + signals: + + /** + * @param bytes number of bytes sent by this server during the last + * time slice. + */ + void wholeServerOutput (ulong bytes); + + /** + * Emitted when a Server object has received a request from its remote + * client. + */ + void request (Server *); + + /** + * Emitted when a Server object has created a response which it wishes + * to send to its remote client. + */ + void response (Server *); + + /** + * Emitted when a Server object when data has been send to remote client. + * @param bytes number of bytes sent to remote client. + */ + void output (Server *, ulong bytes); + + /** + * Emitted when a new Server has been created. + */ + void connection (Server *); + + /** + * Emitted when a Server has finished all transactions. + */ + void finished (Server *); + + /** + * Emitted when this WebServer is now contending, or has stopped + * contending, its listen port. + */ + void contentionChange (bool); + + /** + * Emitted when this WebServer is now accepting, or has stopped + * accepting, incoming connections. + */ + void pauseChange (bool); + + /** + * Emitted when the number active Server objects (served connections) + * changes. + */ + void connectionCount (uint); + + private: + + /** + * @return number of bytes that may be sent out. Changes over time, + * depending on bandwidth limit. + */ + ulong bytesLeft() const; + + /** + * @return number of bytes that may be sent out by each Server, with the + * total split between the existing Server objects. + */ + ulong bandwidthPerClient() const; + + + /** publish this to dns-sd (zeroconf) + */ + void publish(); + /** + * Cause all existing Server objects to close their connections by + * calling Server::cancel. + */ + void killAllConnections(); + + class Private; + Private * d; + }; + +} // End namespace KPF + +#endif // WEB_SERVER_H +// vim:ts=2:sw=2:tw=78:et |