You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.4 KiB
110 lines
3.4 KiB
Applet creation:
|
|
|
|
kicker creates an Applet object via the extern "C" `init' function in
|
|
Applet.cpp
|
|
|
|
Structure:
|
|
|
|
The main classes:
|
|
|
|
ActiveMonitor
|
|
|
|
Shows a list of ActiveMonitorItem objects.
|
|
|
|
ActiveMonitorItem
|
|
|
|
Shows details of a request belonging to a Server object.
|
|
|
|
Applet
|
|
|
|
Contains a set of AppletItem.
|
|
|
|
AppletItem
|
|
|
|
Contains a BandwidthGraph and additionally provides a popup menu.
|
|
|
|
BandwidthGraph
|
|
|
|
Shows a graph of the bandwidth usage of a Server object.
|
|
|
|
Server
|
|
|
|
Serves requests on a connection from a remote client.
|
|
May serve more than one request per connection (this is HTTP persistence.)
|
|
Creates Request object on incoming request.
|
|
Creates Response object when incoming request is fully received.
|
|
Sends Request and Response objects out via Q_SIGNALS, so that they
|
|
may be used by ActiveMonitorItem objects.
|
|
|
|
WebServer
|
|
|
|
Listens for incoming requests.
|
|
Creates and manages Server objects.
|
|
|
|
WebServerManager
|
|
|
|
Singleton.
|
|
Creates and manages WebServer objects.
|
|
|
|
Startup:
|
|
|
|
1. Applet creates WebServerManager singleton (requests pointer to instance.)
|
|
2. WebServerManager reads config and creates WebServers.
|
|
3. Applet is informed via signal as each WebServer is created, and creates
|
|
AppletItem for each.
|
|
4. AppletItem creates BandwidthGraph.
|
|
5. BandwidthGraph connects itself to the new WebServer.
|
|
6. Repeated until all saved WebServers have been created.
|
|
7. Return to event loop.
|
|
|
|
Creation of server by user:
|
|
|
|
1. Via Konqueror properties dialog plugin, context menu on AppletItem, or
|
|
context menu on `bare' Applet, user is asked to configure server.
|
|
From the Konqueror plugin, a simple configuration interface is used.
|
|
From the context menu on the AppletItem or Applet, a ServerWizard is
|
|
created.
|
|
2. If a WebServer is created (user accepts) then the Applet is informed
|
|
and the procedure continues as in Startup, step 4.
|
|
|
|
Run cycle:
|
|
|
|
1. Connection received by a WebServer.
|
|
2. WebServer checks connection limit, if OK creates Server.
|
|
3. Server creates Request object from data supplied by client.
|
|
4. Server emits request(), passing Request object.
|
|
5. WebServer emits request(), passing Request object.
|
|
6. ActiveMonitor creates ActiveMonitorItem using Request object data.
|
|
7. Server generates appropriate Response object.
|
|
8. Server emits response(), passing Response object.
|
|
9. WebServer emits response(), passing Response object.
|
|
10. ActiveMonitor passes Response to relevant ActiveMonitorItem, which updates.
|
|
11. Server passes data to client.
|
|
12. Server emits finished().
|
|
13. WebServer emits finished().
|
|
14. ActiveMonitor informs relevant ActiveMonitorItem that Server is finished.
|
|
15. WebServer deletes Server.
|
|
16. (after delay) ActiveMonitorItem is removed by ActiveMonitor.
|
|
|
|
Bandwidth limiting:
|
|
|
|
Limiting really applies to outgoing traffic only. If `too much' incoming
|
|
traffic is received by a Server object, it simply drops the connection.
|
|
|
|
A WebServer object is responsible for bandwidth management.
|
|
|
|
A Server object may not send data until it is told to by its tqparent (WebServer)
|
|
object. A Server object sends a readyToWrite(this) signal when it has data to
|
|
send.
|
|
|
|
A WebServer object will call Server::write(number of bytes) when it wishes
|
|
to allow a Server to send data.
|
|
|
|
Connection limiting:
|
|
|
|
A WebServer object is responsible for connection limiting. When there are
|
|
`too many' Server objects, it will simply queue up incoming connections
|
|
until its backlog is too long, at which point it will simply ignore further
|
|
incoming connections.
|
|
|