HttpServer::AbstractHttpSocketHandlerInterface Class Reference

Abstract class for HTTP handlers for handling protocol switching. More...

#include <HttpServerUtil.qm.dox.h>

Inheritance diagram for HttpServer::AbstractHttpSocketHandlerInterface:

Public Member Methods
	start (softstring lid, hash< auto > cx, hash< auto > hdr, Socket s)
	called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established More...
	stop ()
	called from the HTTP server when the socket should be closed due to an external request More...
	stop (softstring lid)
	called from the HTTP server when the socket should be closed due to an HTTP listener being stopped More...

Private Member Methods
Mutex	m ()
	listener reference hash mutex
abstract	startImpl (softstring lid, hash< auto > cx, hash< auto > hdr, Socket s)
	called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established More...
	stopImpl ()
	called from the HTTP server when the socket should be closed due to an external request More...
	stopImpl (string lid)
	called from the HTTP server when the socket should be closed because the listener is stopping More...

Private Attributes
hash< string, int >	lh
	hash of listener references; this is to stop all connections associated with a particular listener
hash< string, bool >	lsh
	hash of listener stop flags
bool	stop = False
	stop listener flag

Detailed Description

Abstract class for HTTP handlers for handling protocol switching.

To accept a new dedicated socket connection, make sure the return value of the handleRequest() method returns code 101 (ie Switching Protocols); after which this class's start() and then startImpl() methods are called.

To accept a dedicated socket connection, handleRequest() must return a hash (ideally an HttpServer::HttpResponseInfo hash) with the following keys:

• "code": assign to 101 (ie "Switching Protocols"); if this is returned, then the start() method will be called with the Socket object for the new connection
• "hdr": (optional) set this key to a hash of extra header information to be returned with the response
  or, to handle the request without a dedicated connection, return a hash with the following keys:
• "code": the HTTP return code (see HttpServer::HttpCodes)
• "body": the message body to return in the response
• "close": (optional) set this key to True if the connection should be unconditionally closed when the handler returns
• "hdr": (optional) set this key to a hash of extra header information to be returned with the response

Member Function Documentation

start()

HttpServer::AbstractHttpSocketHandlerInterface::start	(	softstring	lid,
		hash< auto >	cx,
		hash< auto >	hdr,
		Socket	s
	)

called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established

This method should not return until the connection is closed or the stop() method is called

Parameters

lid	the listener ID
cx	call context hash; this hash will have the following keys: header-info: a hash of information about the request header with the following keys: accept-charset: this key will be set to an appropriate value from any "Accept-Charset" header; if any of "*", "utf8", or "utf-8" are present, then this will be set to "utf8", otherwise it will be set to the first requested character encoding in the list accept-encoding: a hash where keys are values from any "Accept-Encoding" header and the values are True body-content-type: this is the "Content-Type" header without any charset declaration charset: if there is a charset declaration in the "Content-Type" header, the value is returned in this key client-cert: if the server is configured to capture remote client certificates, and the client supplied a certificate, this key will be populated with the SSLCertificate for the client close: set to True if the connection should be closed after responding, False if not (as derived from the request header) headers-raw: a hash of raw request headers without any case conversions or other processing request-uri: gives the request URI in an HTTP request socket: the bind address used to bind the listener ("socket-info" provides more detailed information) socket-info: a hash of socket information for the listening socket (as returned by Qore::Socket::getSocketInfo()) peer-info: a hash of socket information for the remote socket (as returned by Qore::Socket::getPeerInfo()) url: a hash of broken-down URL information (as returned from Qore::parse_url()) id: the unique HTTP connection ID ssl: True if the request was encrypted with HTTPS, False if not listener-id: the HTTP server listener ID (see HttpServer::getListenerInfo()) user: the current RBAC username (if any) root_path: the root URL path matched if the request was matched by a URL prefix
hdr	a hash of headers in the request
s	the Socket object for the dedicated connection

startImpl()

abstract HttpServer::AbstractHttpSocketHandlerInterface::startImpl ( softstring  lid, hash< auto >  cx, hash< auto >  hdr, Socket  s  )

privatepure virtual

called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established

This method should not return until the connection is closed or the stop() (and therefore stopImpl()) method is called

Parameters

lid	the listener ID
cx	call context hash; this hash will have the following keys: socket: the bind address used to bind the listener ("socket-info" provides more detailed information) socket-info: a hash of socket information for the listening socket (as returned by Qore::Socket::getSocketInfo()) peer-info: a hash of socket information for the remote socket (as returned by Qore::Socket::getPeerInfo()) url: a hash of broken-down URL information (as returned from Qore::parse_url()) id: the unique HTTP connection ID ssl: True if the request was encrypted with HTTPS, False if not listener-id: the HTTP server listener ID (see HttpServer::getListenerInfo()) user: the current RBAC username (if any) root_path: the root URL path matched if the request was matched by a URL prefix
hdr	a hash of headers in the request
s	the Socket object for the dedicated connection

stop() [1/2]

HttpServer::AbstractHttpSocketHandlerInterface::stop

(

)

called from the HTTP server when the socket should be closed due to an external request

The start() method should return as soon as possible after this method is called

Child classes should implement the stopImpl() method which is called from this method to implement custom stop actions.

stop() [2/2]

HttpServer::AbstractHttpSocketHandlerInterface::stop

(

softstring

lid

)

called from the HTTP server when the socket should be closed due to an HTTP listener being stopped

The start() method for all connections on the particular listener should return as soon as possible after this method is called.

Child classes should implement the stopImpl(string) method which is called from this method to implement custom stop actions for particular listeners.

Parameters

lid	the listener ID

stopImpl() [1/2]

HttpServer::AbstractHttpSocketHandlerInterface::stopImpl ( )

private

called from the HTTP server when the socket should be closed due to an external request

The start() method should return as soon as possible after this method is called

stopImpl() [2/2]

HttpServer::AbstractHttpSocketHandlerInterface::stopImpl ( string  lid )

private

called from the HTTP server when the socket should be closed because the listener is stopping

The start() method for all connections handled by the given listener should return as soon as possible after this method is called

Parameters

lid	the listener ID