(DataFlex) HTTP POST JSON and Parse JSON Response

Demonstrates how to send a JSON POST and then parse the JSON response.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Variant vJson
    Handle hoJson
    Handle hoHttp
    Variant vResp
    Handle hoResp
    Handle hoJsonResp
    String sLifeAmount
    String sLifeResidualAmount
    String sTemp1

    Move False To iSuccess

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End

    Get ComLoadFile Of hoJson "qa_data/json/jsonBodyForHttpPost.json" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoJson To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    Get Create (RefClass(cComChilkatHttpResponse)) To hoResp
    If (Not(IsComObjectCreated(hoResp))) Begin
        Send CreateComObject of hoResp
    End
    Get pvComObject of hoJson to vJson
    Get pvComObject of hoResp to vResp
    Get ComHttpJson Of hoHttp "POST" "https://test.something.com/XYZ/API/v1/CreditInsuranceCalculator/CalculatePremiums" vJson "application/json" vResp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJsonResp
    If (Not(IsComObjectCreated(hoJsonResp))) Begin
        Send CreateComObject of hoJsonResp
    End
    Get ComBodyStr Of hoResp To sTemp1
    Get ComLoad Of hoJsonResp sTemp1 To iSuccess

    Set ComEmitCompact Of hoJsonResp To False
    Get ComEmit Of hoJsonResp To sTemp1
    Showln sTemp1

    // The JSON response to be parsed looks like this:
    // {
    //   "LifeAmount": 513.85,
    //   "LifeResidualAmount": 123.38,
    //   "CriticalIllnessAmount": 0,
    //   "CriticalIllnessResidualAmount": 0,
    //   "DisabilityAmount": 881.70,
    //   "PolicyFee": 0.00,
    //   "PolicyFeeSecondary": 0,
    //   "PolicyFeeHidden": 50.00,
    //   "PolicyFeeHiddenSecondary": 0
    // }

    // We can get the floating point numbers as strings.  Then convert to double
    // using the appropriate string-to-double conversion for your programming language.
    // For example, in C++ use atof.  In C# use Convert.ToDouble.  
    Get ComStringOf Of hoJsonResp "LifeAmount" To sLifeAmount
    Get ComStringOf Of hoJsonResp "LifeResidualAmount" To sLifeResidualAmount

    Showln "LifeAmount = " sLifeAmount
    Showln "LifeResidualAmount = " sLifeResidualAmount


End_Procedure