(Node.js) Example: Http.DownloadAppend method

Demonstrates the DownloadAppend method.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var success = false;

    success = false;

    var targetPath = "c:/temp/qa_output/download.txt";

    var http = new chilkat.Http();
    http.KeepResponseBody = true;

    // Assume the target file in the local filesystem does not yet exist.
    success = http.DownloadAppend("https://chilkatsoft.com/testData/helloWorld.txt",targetPath);
    var statusCode = http.LastStatus;
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        console.log(http.LastErrorText);
        return;
    }

    // Should be 200.
    console.log("Response status code: " + statusCode);

    // Examine the contents of the file.
    var sb = new chilkat.StringBuilder();
    sb.LoadFile(targetPath,"utf-8");
    console.log(sb.GetAsString());

    // Output: 
    // Response status code: 200
    // Hello World!

    // Download another text file and append to the target file.
    success = http.DownloadAppend("https://chilkatsoft.com/testData/this_is_a_test.txt",targetPath);
    statusCode = http.LastStatus;
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        console.log(http.LastErrorText);
        return;
    }

    // Should be 200.
    console.log("Response status code: " + statusCode);

    // Examine the contents of the file.
    sb.LoadFile(targetPath,"utf-8");
    console.log(sb.GetAsString());

    // Output:
    // Response status code: 200
    // Hello World!This is a Test.

    // Delete the local target file.
    var fac = new chilkat.FileAccess();
    fac.FileDelete(targetPath);

    // Try to download a file that does not exist:
    success = http.DownloadAppend("https://chilkatsoft.com/testData/does_not_exist.txt",targetPath);
    statusCode = http.LastStatus;
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        console.log(http.LastErrorText);
    }
    else {
        // We got a response, and we already know it wasn't a 200 success response.
        // It should be a 404 not found.
        console.log("Response status code: " + statusCode);
        // Examine the response body.
        console.log("Response body:");
        console.log(http.LastResponseBody);
    }


}

chilkatExample();