Node.js

HTTP POST and Stream Response to File

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Demonstrates how to send an HTTP POST and stream the response body directly to a file. Node.js

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

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

    var rest = new chilkat.Rest();

    var url = new chilkat.Url();
    //  This URL will emit a response that echos the query params (name and age)
    url.ParseUrl("https://www.chilkatsoft.com/readPost.asp");

    //  Connect to the web server
    var bAutoReconnect = true;
    success = rest.Connect(url.Host,url.Port,url.Ssl,bAutoReconnect);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    rest.AddQueryParam("name","John");
    rest.AddQueryParam("age","33");

    //   Send the HTTP POST.
    success = rest.SendReqFormUrlEncoded("POST",url.Path);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

    //  Read the response header.
    var responseStatusCode = rest.ReadResponseHeader();
    if (responseStatusCode < 0) {
        console.log(rest.LastErrorText);
        return;
    }

    console.log("Response status code = " + responseStatusCode);

    //  We expect a 200 response status if the file data is coming.
    //  Otherwise, we'll get a string response body with an error message(or no response body).
    if (responseStatusCode == 200) {

        var bodyStream = new chilkat.Stream();

        //  The stream's sink will be a file.
        bodyStream.SinkFile = "qa_output/out.txt";

        //  Read the response body to the stream.  Given that we've
        //  set the stream's sink to a file, it will stream directly
        //  to the file.
        success = rest.ReadRespBodyStream(bodyStream,true);
        if (success !== true) {
            console.log(rest.LastErrorText);
            return;
        }

        console.log("Successfully streamed the response to a file.");

    }
    else {
        var errResponse = rest.ReadRespBodyString();
        if (rest.LastMethodSuccess !== true) {
            console.log(rest.LastErrorText);
        }
        else {
            console.log(errResponse);
        }

    }


}

chilkatExample();