Xbase++

Test if an Email Header Matches a Pattern

Demonstrates the Chilkat Email.HasHeaderMatching method, which returns true when the email contains a header field named by the first argument whose value matches the wildcard pattern in the second argument. The third argument selects case-sensitive matching. This example checks whether the Subject contains the word "invoice".

Background: The value pattern supports wildcards — * matches any run of characters — so *invoice* matches any subject containing "invoice" anywhere. This is a compact way to classify or filter messages by header content, for example routing billing mail or flagging automated notices, without manually fetching the header value and testing it yourself.

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LOCAL oEmail
LOCAL nMatch

//  Demonstrates the HasHeaderMatching method, which returns true when the email contains a
//  header field named by the first argument whose value matches the wildcard pattern in the second argument.  The third argument selects
//  case-sensitive matching.

oEmail := CreateObject("Chilkat.Email")
oEmail:Subject := "Monthly invoice #4432"
oEmail:From := "billing@example.com"

//  Check whether the Subject header value matches a wildcard pattern (case-insensitive).
nMatch := oEmail:HasHeaderMatching("Subject", "*invoice*", 0)

IF (nMatch == 1)
    ? "The Subject header contains 'invoice'."
ELSE
    ? "The Subject header does not contain 'invoice'."
ENDIF

oEmail:destroy()