(DataFlex) Example: Http.HttpJson method - Send a POST with JSON Body

See more HTTP Examples

Demonstrates how to call the HttpJson method, which sends an HTTP POST with a JSON body. This example sends the following request:

POST /echo_request_body.asp HTTP/1.1
Host: chilkatsoft.com
Accept: */*
Accept-Encoding: gzip
Content-Type: application/json
Content-Length: 26

{"greeting":"Hello World"}

Also see: Chilkat Http Default and Auto-Filled Headers

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
    Handle hoHttp
    Variant vJson
    Handle hoJson
    String sUrl
    Variant vResp
    Handle hoResp
    String sTemp1
    Integer iTemp1

    Move False To iSuccess

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

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

    // Build the following JSON:  {"greeting":"Hello World"}
    Get ComUpdateString Of hoJson "greeting" "Hello World" To iSuccess

    // This URL echoes the contents of the request body, letting us view it.
    Move "https://chilkatsoft.com/echo_request_body.asp" To sUrl

    // Send a POST with the JSON in the HTTP request body.
    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" sUrl vJson "application/json" vResp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStatusCode Of hoResp To iTemp1
    Showln "Response Status Code: " iTemp1

    // Examine the request we sent.
    // The LastHeader property stores the HTTP request header of the most recent request sent,
    // and in this instance, the response body mirrors the request body.
    Get ComLastHeader Of hoHttp To sTemp1
    Showln sTemp1
    Get ComBodyStr Of hoResp To sTemp1
    Showln sTemp1

    // Output:

    // POST /echo_request_body.asp HTTP/1.1
    // Host: chilkatsoft.com
    // Accept: */*
    // Accept-Encoding: gzip
    // Content-Type: application/json
    // Content-Length: 26
    // 
    // {"greeting":"Hello World"}


End_Procedure