OtherHeaders Property

Other headers as determined by the user (optional).

Syntax

 caldav.getOtherHeaders([callback])
 caldav.setOtherHeaders( otherHeaders, [callback])

Default Value

""

Callback

The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).

The callback for the getOtherHeaders([callback]) method is defined as:

function(err, data){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'data' is the value returned by the method.

The callback for the setOtherHeaders([callback]) method is defined as:

function(err){ }

'err' is the error that occurred. If there was no error, then 'err' is 'null'.

'err' has 2 properties which hold detailed information:

err.code
err.message

Remarks

This property can be set to a string of headers to be appended to the HTTP request headers created from other properties like ContentType, From, etc.

The headers must be of the format "header: value" as described in the HTTP specifications. Header lines should be separated by CRLF ("\r\n") .

Use this property with caution. If this property contains invalid headers, HTTP requests may fail.

This property is useful for extending the functionality of the class beyond what is provided.

For CalDAV, the "If-Match" header is extremely useful. After adding a an event with PutCalendarEvent or retrieving an event with GetCalendarEvent, the ETag property will contain a value indicating the current state of the event. If you wish to update the event, you may pass this returned ETag in an "If-Match" header. If the event on the server has been modified since you retrieved it (and the ETag on the server has changed), then the PutCalendarEvent will fail with an HTTP Protocol Error: "409 Conflict", which indicates there is a conflict between the version you're trying to update and the current version on the sever. For instance:

  calDAV.OtherHeaders = "If-Match: 1900-1900\r\ n";

This property is not available at design time.

Data Type

String