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MSPL Built-in Functions

MSPL Built-in Functions

The Microsoft SIP Processing Language (MSPL) provides several built-in functions that are useful for common SIP application tasks, such as message forking, the creation of proxy objects, and parameter parsing.

Certain functions, such as BeginFork/Fork/EndFork, must be called in a certain order; otherwise, an error will be generated. Other functions must be called only when the message being processed is a request or a response; otherwise, a critical error will also be generated. If 10 critical errors of this type are generated during run time, the application will be disabled.

MSPL defines the built-in functions described in the following table.

Function

Description

AddHeader

Adds a header to the current SIP message.

BeginFork

Initializes a forking operation for the current message.

CheckUserOption

Indicates whether the user is enabled for a specified option.

Concatenate

Concatenates a sequence of supplied string values, in parameter order.

ContainsString

Searches for an occurrence of one specified string within another.

Dispatch

Dispatches an event to a supplied event handler within the application.

DispatchNotification

Indicates whether a message was successfully queued.

DomainSupported

Indicates whether a specified domain is supported by the registrar on the Microsoft Lync Server 2010 computer executing this script.

EndFork

Sends the current set of forked messages using the forking proxy initialized with BeginFork.

EqualString

Determines whether two supplied strings are equal.

Fork

Creates a forked copy of the current message with its request URI field set to the supplied URI string.

GetDisplayName

Returns the display name associated with a supplied SIP address.

GetEndpointInstanceFromGRUU

Returns a string representation of the instance ID from the GRUU.

GetHeaderValues

Returns a collection of strings containing the values associated with the supplied header name in the current SIP message.

GetHostName

Returns the hostname portion of a supplied SIP URI.

GetParameterValue

Returns the value of a named parameter within a SIP header string.

GetPort

Returns the port specified in a SIP URI.

GetScheme

Returns the scheme associated with the SIP URI.

GetUri

Returns the URI portion of a SIP address, such as the address found in the From or To header field of a SIP message.

GetUriParameter

Returns the named parameter value found in a supplied SIP URI.

GetUserAtHost

Extracts user@hostname from a URL.

GetUserName

Returns the user name portion of a SIP URI.

HashString

Computes a hash value from a string.

IndexOfString

Returns an index of the first occurrence of a specified string.

IsGRUU

Indicates whether a specified URI is formatted as a GRUU.

IsPhoneUri

Indicates whether a specified URI points to a phone.

LengthString

Returns the number of characters in a string.

Log

Writes an entry or entries to the specified server log.

ProxyRequest

Proxies the current SIP request to the supplied URI.

ProxyResponse

Proxies the current SIP response to the next destination in its route.

QueryCategory

Fetches an item published in a specified enhanced presence container.

QueryCategoryBySubscriber

Fetches an item published in a specified enhanced presence container which is selected based on the access control lists associated with the indicated Subscriber and ExternalSourceNetwork.

QueryDomain

Indicates whether a specified domain belongs to a specified domain type.

QueryEndpoints

Queries the server registrar for the network endpoints associated with a specified user and hostname combination.

QueryHomeServer

Returns the fully qualified domain name of the home server for a specified SIP user.

QueryUserPolicy

Returns an XML fragment containing the policy assigned to the specified user based on server configuration.

Respond

Generates a SIP response to the current request message with the supplied status code and reason phrase.

SetParameterValue

Adds or sets a specific parameter value in a SIP header.

Split(string, string)

Splits a string on a specified separator substring and returns a string collection.

SubdomainOf

Tests whether one domain is a subdomain of another specified domain.

SubString

Extracts a specified string from a larger string.

SupportsMethod

Determines whether a specific SIP method is supported by the application.