DataFlex

Load JSON Object from HTTP Response Body

Demonstrates how to load the HTTP response body directly into a JSON object. DataFlex

Use ChilkatAx-win32.pkg

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

    Move False To iSuccess

    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 hoResp to vResp
    Get ComHttpStr Of hoHttp "GET" "https://www.chilkatsoft.com/exampledata/sample.json" "" "" "" vResp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // A JSON object is JSON that begins with "{" and ends with "}"
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End

    // If we wish to transfer (instead of copy) the JSON from the HttpResponse to the JsonObject, then add the keyword "TakeResponseBody" to UncommonOptions
    // This could save memory for extremely large JSON responses.
    Set ComUncommonOptions Of hoResp To "TakeResponseBody"

    Get pvComObject of hoJson to vJson
    Get ComGetBodyJson Of hoResp vJson To iSuccess

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

    // Note: If UncommonOptions contained "TakeResponseBody", then the response BodyStr will now be empty:
    Showln "----"
    Get ComBodyStr Of hoResp To sTemp1
    Showln sTemp1


End_Procedure