ServerSentEvent Tcl Reference Documentation

ServerSentEvent

Current Version: 11.0.0

Represents a server-sent event (SSE) received from an HTTP text/event-stream.

Object Creation

set myServerSentEvent [new CkServerSentEvent]

Properties

Data
string
# ckStr is a CkString
CkServerSentEvent_get_Data $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_data $myServerSentEvent]
Introduced in version 9.5.0.58

The data for the server-side event. (If the "data" field was empty, then this will be empty.)

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DebugLogFilePath
string
# ckStr is a CkString
CkServerSentEvent_get_DebugLogFilePath $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_debugLogFilePath $myServerSentEvent]
CkServerSentEvent_put_DebugLogFilePath $myServerSentEvent $strVal

If set to a file path, this property logs the LastErrorText of each Chilkat method or property call to the specified file. This logging helps identify the context and history of Chilkat calls leading up to any crash or hang, aiding in debugging.

Enabling the VerboseLogging property provides more detailed information. This property is mainly used for debugging rare instances where a Chilkat method call causes a hang or crash, which should generally not happen.

Possible causes of hangs include:

  • A timeout property set to 0, indicating an infinite timeout.
  • A hang occurring within an event callback in the application code.
  • An internal bug in the Chilkat code causing the hang.

More Information and Examples
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EventName
string
# ckStr is a CkString
CkServerSentEvent_get_EventName $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_eventName $myServerSentEvent]
Introduced in version 9.5.0.58

The name of the server-side event. (If the "event" field was not present, then this will be empty.)

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LastErrorHtml
string
# ckStr is a CkString
CkServerSentEvent_get_LastErrorHtml $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_lastErrorHtml $myServerSentEvent]

Provides HTML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorText
string
# ckStr is a CkString
CkServerSentEvent_get_LastErrorText $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_lastErrorText $myServerSentEvent]

Provides plain text information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastErrorXml
string
# ckStr is a CkString
CkServerSentEvent_get_LastErrorXml $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_lastErrorXml $myServerSentEvent]

Provides XML-formatted information about the last called method or property. If a method call fails or behaves unexpectedly, check this property for details. Note that information is available regardless of the method call's success.

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LastEventId
string
# ckStr is a CkString
CkServerSentEvent_get_LastEventId $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_lastEventId $myServerSentEvent]
Introduced in version 9.5.0.58

The content of the "id" field, if present.

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LastMethodSuccess
boolean 1/0
set boolVal [CkServerSentEvent_get_LastMethodSuccess $myServerSentEvent]
CkServerSentEvent_put_LastMethodSuccess $myServerSentEvent $boolVal

Indicates the success or failure of the most recent method call: 1 means success, 0 means failure. This property remains unchanged by property setters or getters. This method is present to address challenges in checking for null or Nothing returns in certain programming languages.

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Retry
integer
set intVal [CkServerSentEvent_get_Retry $myServerSentEvent]
Introduced in version 9.5.0.58

The integer value of the "retry" field, if it exists; otherwise, 0.

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VerboseLogging
boolean 1/0
set boolVal [CkServerSentEvent_get_VerboseLogging $myServerSentEvent]
CkServerSentEvent_put_VerboseLogging $myServerSentEvent $boolVal

If set to 1, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is 0. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
string
# ckStr is a CkString
CkServerSentEvent_get_Version $myServerSentEvent $ckStr
set strVal [CkServerSentEvent_get_version $myServerSentEvent]

Version of the component/library, such as "10.1.0"

More Information and Examples
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Methods

LoadEvent
# eventText is a string
set status [CkServerSentEvent_LoadEvent $eventText]
Introduced in version 9.5.0.58

Loads the multi-line event text into this object. For example, the eventText for a Firebase event might look like this:

event: put
data: {"path": "/c", "data": {"foo": true, "bar": false}}

Returns 1 for success, 0 for failure.

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