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DataFlex

Receive an Exact Number of Bytes as Encoded Text

See more Socket/SSL/TLS Examples

Demonstrates Socket.ReceiveNBytesENC, which receives exactly the requested number of bytes and returns them encoded using a named encoding. It waits until the full count is received.

Background. Inactivity is controlled by MaxReadIdleMs: the call fails if incoming bytes halt for longer than MaxReadIdleMs milliseconds before the full amount is received. The ENC methods move raw binary data to and from printable text using a named encoding such as base64 or hex.

Chilkat DataFlex Downloads

DataFlex
Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoSocket
    Boolean iBTls
    Integer iMaxWaitMs
    String sHex
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

    Get Create (RefClass(cComChilkatSocket)) To hoSocket
    If (Not(IsComObjectCreated(hoSocket))) Begin
        Send CreateComObject of hoSocket
    End

    //  Connect to the server using TLS.
    Move True To iBTls
    Move 5000 To iMaxWaitMs
    Get ComConnect Of hoSocket "example.com" 5000 iBTls iMaxWaitMs To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoSocket To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    //  MaxReadIdleMs controls the inactivity limit for receiving.  The ReceiveNBytesENC call will fail if
    //  incoming bytes halt for longer than this many milliseconds before the full amount is received.
    Set ComMaxReadIdleMs Of hoSocket To 15000

    //  Receive exactly the requested number of bytes and return them encoded using the named encoding.
    //  Unlike ReceiveBytesENC, this waits until the full count has been received.
    Get ComReceiveNBytesENC Of hoSocket 16 "hex" To sHex
    Get ComLastMethodSuccess Of hoSocket To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoSocket To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Showln sHex


End_Procedure