AGI:解析 SIP Header

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解析 SIP Header 的 Diversion 欄位內容

Dialplan：

[my-sip-header-filter]
exten => s,1,NoOp( Incoming calls from internet )
exten => s,n,NoOp(SIP_HEADER From field: ${SIP_HEADER(From,1)})
exten => s,n,NoOp(SIP_HEADER To field: ${SIP_HEADER(To,1)})
; for debug only
exten => s,n,GotoIf($[${LEN(${SIP_HEADER(Diversion,1)})} > 0]?next:next)
;exten => s,n,GotoIf($[${LEN(${SIP_HEADER(Diversion,1)})} > 0]?next)
exten => s,n,NoOp(SIP_HEADER Diversion field: <Data Not Found>)
exten => s,n,Hangup
exten => s,n(next),NoOp(SIP_HEADER Diversion field: ${SIP_HEADER(Diversion,1)})
exten => s,n,Set(STR=${SIP_HEADER(Diversion,1)})
exten => s,n,NoOp(STR: ${STR})
exten => s,n,AGI(get_diverter.php,${STR})
exten => s,n,NoOp(Diverter: ${DIVERTER})
exten => s,n,Hangup

get_diverter.php：

reference to undefined name 'syntax' Exception of type 'MindTouch.Deki.Script.Runtime.DekiScriptUndefinedNameException' was thrown. (click for details)

Callstack:
    at User:alang/Private_Zone/Asterisk_開發筆記/AGI:解析_SIP_Header

MindTouch.Deki.Script.Runtime.DekiScriptUndefinedNameException: reference to undefined name 'syntax' Exception of type 'MindTouch.Deki.Script.Runtime.DekiScriptUndefinedNameException' was thrown.
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptVar expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptVar.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Evaluate (MindTouch.Deki.Script.Expr.DekiScriptAccess expr, DekiScriptExpressionEvaluationState state, Boolean evaluateProperties) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptAccess expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptAccess.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptCall expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptCall.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptSequence expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Expr.DekiScriptSequence.VisitWith[DekiScriptExpressionEvaluationState,Range] (IDekiScriptExpressionVisitor`2 visitor, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0 
  at MindTouch.Deki.Script.Compiler.DekiScriptExpressionEvaluation.Visit (MindTouch.Deki.Script.Expr.DekiScriptReturnScope expr, DekiScriptExpressionEvaluationState state) [0x00000] in <filename unknown>:0

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