CONTROL
- Introduction to CTRL
- CONTROL Classes
- Types of Control Functions
- Control graphics
- CONTROL Functions
  - Funtions A
  - Funtions B
  - Funtions C
  - Funtions D
  - Functions E
  - Functions F
  - Functions G
  - Functions H
    - hasEvent()
      This function checks if an object defines an event.
    - hasMethod()
      The function returns TRUE when the specified method exists.
    - HOOK_aes_acknowledgeTableFunction()
      The system executes the function when you acknowledge an alert in the alert screen. Implement the function in a CONTROL library.
    - HOOK_ep_acknowledgeTableFunction()
      The system executes the function when you acknowledge a table (when you use the simple configuration). Implement the function in a CONTROL library.
    - HOOK_isAckable()
      The system executes the function when you acknowledge alarms. Implement the function in a CONTROL library.
    - hotKeyDialog()
      The function opens a window that allows you to select a hotkey for a shape.
    - hour()
      Returns the hour portion (0 to 23) of a time t.
    - html_ref()
      This function loads a reference into an HTML reference. The parameters will be replaced.
    - httpAccessLog()
      Creates an httpAccess.log file in the log directory and writes a log line for each HTTP request into the file.
    - httpCloseWebSocket()
      The function closes web sockets.
    - httpConnect()
      Registers a CTRL function as a Web resource
    - httpDisconnect()
      Remove a registered Web-Resource
    - httpGetAllHeaders()
      The function returns a mapping of all HTTP headers.
    - httpGetContent()
      This function extracts the content of the currently processing HTTP-Request.
    - httpGetHeader()
      Returns the value of the header (== key) of the last HTTP message.
    - httpGetLanguage()
      The function checks the stated client connection and returns a matching language ID. The function httpGetLanguageId() can be used to keep the same functionality but have a OaLanguage enum value returned.
    - httpGetLanguageId()
      The function checks the stated client connection and returns a matching OaLanguage enum value. This function provides the same functionality as httpGetLanguage(), but uses the new OaLanguage enum as return value.
    - httpGetMethod()
      The function returns the HTTP method of the last HTTP message.
    - httpGetPort()
      Returns the port and connection used for the HTTP request.
    - httpGetQuery()
      Returns the HTTP query elements as key/value pairs
    - httpGetURI()
      Returns the last from the Client (index) requested URI from the HTTP server.
    - httpMakeParamString()
      Returns a string from the passed arguments that represents the query part of a URL.
    - httpOnConnectionClose()
      The function starts the specified callBack function when the HTTP connection is closed.
    - httpParseDate()
      Allows parsing an RFC-2616 conform date string, e.g. from header "If-Modified-Since".
    - httpReadWebSocket()
      The function reads web sockets.
    - httpSaveFilesFromUpload()
      The function returns the HTTP content of a Blob variable that was received from an HTTP client via an HTML form. The function copies the content of this blob variable (a file) into a directory.
    - httpServer()
      Installs and activates an HTTP server.
    - httpSetMaxAge()
      Defines the time in seconds how long files should be cached by the client.
    - httpSetMaxContentLength()
      Sets the maximum length of a POST request.
    - httpSetMethodHandler()
      The function can be used to redirect an HTTP method to a user-defined CTRL callback function.
    - httpSetPermission()
      The function httpSetPemission() allows to define more fine grained user permissions for a specific URL used with the HTTP Server.
    - httpSetSecondaryAuthSuccess()
      The function is used to check for secondary authentification and implement a login delay.
    - httpSetUlcUserName()
      Sets the userName that will be used for the ULC_UX/ulc_ux_basics.html.
    - httpWriteWebSocket()
      The function writes web sockets.
  - Functions I
  - Functions J
  - Functions K
  - Functions L
  - Functions M
  - Functions N
  - Functions O
  - Functions P
  - Functions Q
  - Functions R
  - Functions S
  - Functions T
  - Functions U
  - Functions V
  - Functions W
  - Functions X
  - Functions Y
  - Functions Z
- CTRL Debugger
  With the CTRL Debugger you can debug the programming language Control.
- CtrlExtension, basics

httpSetMaxAge()

Defines the time in seconds how long files should be cached by the client.

Synopsis

int httpSetMaxAge( uint maxAge);

Parameter


Parameter	Description
maxAge	Time in seconds how long files are cached by the client.

Return value

httpSetMaxAge() returns 0 on success, otherwise -1.

Error

Errors can be queried with getLastError(). Errors can be:

Too few arguments
No httpServer() is installed
httpSetMaxAge() is called from a different script than the httpServer() was installed from
The given web resource is not registered

Description

The function httpSetMaxAge() defines the time in seconds how long files should be cached by the client, i.e. the maximum cache time (Response Header Cache Control and Expires). From this value the Cache Control (equals to maxAge) as well as Expires (current time + maxAge) is calculated.

This function is meaningful when the client must request the same files from the server several times.

Example

#uses "CtrlHTTP"
main()
{
  httpServer();// Installs the HTTP server
  httpSetMaxAge(3600); // Files are cached 1 hour
  httpConnect("example", "/firstExample");
}
string example()
{
  return "<html><head><title>First
  Example</title></head>"
  "<body>This is my first HTML
  example</body></html>";
}

Assignment

CTRL PlugIn

Availability

CTRL