HttpServer::AbstractHttpSocketHandler Class Referenceabstract

abstract class that all HTTP dedicated socket handler objects must inherit from More...

Inheritance diagram for HttpServer::AbstractHttpSocketHandler:
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## Public Member Functions

| constructor (*AbstractAuthenticator auth)
| create the object optionally with the given AbstractAuthenticator More...
abstract hash | handleRequest (hash cx, hash hdr, *data b)
| called by the HTTP server to handle incoming HTTP requests More...
| start (softstring lid, hash cx, hash hdr, Socket s)
| called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established More...
| 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 More...
| 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 More...
Public Member Functions inherited from HttpServer::AbstractHttpRequestHandler
| constructor (*AbstractAuthenticator n_auth, softbool n_stream=False)
| create the object optionally with the given AbstractAuthenticator More...
*data | getMessageBody (Socket s, hash hdr, *data body, bool decode=True)
| optionally retrieves and post-processes any message body
hash< HttpResponseInfo > | handleRequest (hash cx, hash hdr, *data body)
| will be called when a request is received that should be directed to the handler More...
hash< HttpResponseInfo > | handleRequest (HttpListenerInterface listener, Socket s, hash cx, hash hdr, *data body)
| top-level request handling method
bool | isPersistent ()
| returns True if the current connection is persistent, False if not
string | maskData (string msg)
| this method can be used to mask data in debug messages More...
| notifyClosed (*code c)
| calls the argument when the persistent connection is closed
nothing | persistentClosed ()
| called externally when a persistent connection is closed
| restoreThreadLocalData (*hash data)
| called after handleRequest() with any data returned from saveThreadData() More...
*hash | saveThreadLocalData ()
| called before handleRequest() any data returned here will be given to restoreThreadLocalData() after the handleRequest() call More...
| setPersistent (bool p=True)
| called externally to notify the handler that the connection will be persistent

## Private Member Functions

Mutex | m ()
| listener reference hash mutex
abstract | startImpl (softstring lid, hash cx, hash hdr, Socket s)
| called from the HTTP server after the handleRequest() method indicates that a dedicated connection should be established More...
| stopImpl (string lid)
| 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 More...
| stopImpl ()
| 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

## Private Attributes

hash | lh
| hash of listener references; this is to stop all connections associated with a particular listener
hash | lsh
| hash of listener stop flags
bool | stop = False
| stop listener flag

## Additional Inherited Members

Static Public Member Functions inherited from HttpServer::AbstractHttpRequestHandler
static data | decodeBody (string ce, binary body, *string enc)
| decodes a message body with content-encoding
static binary | encodeBody (string ce, data body)
| encodes a message body with content-encoding
static *string | getLogMessage (hash cx, hash api, reference params, *reference< string > args)
| helper method for handling log messages More...
static hash< HttpResponseInfo > | make400 (string fmt)
| creates a hash for an HTTP 400 error response with the response message body as a string
static hash< HttpResponseInfo > | make400 (hash hdr, string fmt)
| creates a hash for an HTTP 400 error response with the response message body as a string
static hash< HttpResponseInfo > | make501 (string fmt)
| creates a hash for an HTTP 501 error response with the response message body as a string
static hash< HttpResponseInfo > | make501 (hash hdr, string fmt)
| creates a hash for an HTTP 501 error response with the response message body as a string
static hash< HttpResponseInfo > | makeResponse (int code, string fmt)
| creates a hash for an HTTP response with the response code and the response message body as a formatted string
static hash< HttpResponseInfo > | makeResponse (hash hdr, int code, string fmt)
| creates a hash for an HTTP response with the response code and the response message body as a formatted string
static hash< HttpResponseInfo > | makeResponse (int code, *data body, *hash hdr)
| creates a hash for an HTTP response with the response code and a literal response message body
static hash< HttpResponseInfo > | redirect (hash cx, hash hdr, string path)
| generates a redirect hash for the given path
static | staticNotificationCleanup ()
| removes the thread-local data key in case the object is destroyed in another thread
static | staticPersistenceCleanup ()
| removes the thread-local data key in case the object is destroyed in another thread
Public Attributes inherited from HttpServer::AbstractHttpRequestHandler
*AbstractAuthenticator | auth
| the optional AbstractAuthenticator for requests to this handler
bool | decompress = True
| if POSTed data should be decompressed automatically if there is content-encoding
bool | decompress_to_string = True
| if automatically decompressed POSTed data should be converted to a string (if False, then it will be decompressed to a binary)
const | NotificationThreadKey = "_AHRH_pc"
| thread-local key string for notification callbacks
const | PersistenceThreadKey = "_AHRH_p"
| thread-local key string for the persistent flag
bool | stream
| if the handler supports streaming requests/responses with chunked data
timeout | timeout_ms = HttpServer::DefaultTimeout
| send and receive socket timeout in milliseconds

## Detailed Description

abstract class that all HTTP dedicated socket handler objects must inherit from

reimplement at least handleRequest() and startImpl() in subclasses

## Member Function Documentation

## constructor()

HttpServer::AbstractHttpSocketHandler::constructor | ( | *AbstractAuthenticator | auth | ) |

create the object optionally with the given AbstractAuthenticator

Parameters

  auth | the authentication object to use to authenticate connections (see AbstractAuthenticator); if no AbstractAuthenticator object is passed, then by default no authentication will be required

## handleRequest()

abstract hash HttpServer::AbstractHttpSocketHandler::handleRequest | ( | hash | cx,
|  | hash | hdr,
|  | *data | b
| ) |  |

pure virtual

called by the HTTP server to handle incoming HTTP requests

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

Parameters

  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

  incoming header hash; all keys will be converted to lower-case, additionally the following keys will be present:
  - `method:` the HTTP method received (ie `"GET"`, `"POST"`, etc)
  - `path:` the HTTP path given in the request, after processing by Qore::decode_uri_request()
  - `http_version:` the HTTP version number in the request (either `"1.0"` or `"1.1"`)

  b | message body, if any

Returns
  to accept a dedicated connection, return a hash (ideally an HttpServer::HttpRequestInfo hash) with the following key:
  - `"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

## start()

HttpServer::AbstractHttpSocketHandler::start | ( | softstring | lid,
|  | hash | cx,
|  | hash | 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:
  - `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::AbstractHttpSocketHandler::startImpl | ( | softstring | lid,
|  | hash | cx,
|  | hash | 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::AbstractHttpSocketHandler::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

## stop() [2/2]

HttpServer::AbstractHttpSocketHandler::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

## stopImpl()

HttpServer::AbstractHttpSocketHandler::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