(C++) Example: Http.DownloadAppend method

Demonstrates the DownloadAppend method.

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#include <CkHttp.h>
#include <CkStringBuilder.h>
#include <CkFileAccess.h>

void ChilkatSample(void)
    {
    bool success = false;

    success = false;

    const char *targetPath = "c:/temp/qa_output/download.txt";

    CkHttp http;
    http.put_KeepResponseBody(true);

    // Assume the target file in the local filesystem does not yet exist.
    success = http.DownloadAppend("https://chilkatsoft.com/testData/helloWorld.txt",targetPath);
    int statusCode = http.get_LastStatus();
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    // Should be 200.
    std::cout << "Response status code: " << statusCode << "\r\n";

    // Examine the contents of the file.
    CkStringBuilder sb;
    sb.LoadFile(targetPath,"utf-8");
    std::cout << sb.getAsString() << "\r\n";

    // 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.get_LastStatus();
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    // Should be 200.
    std::cout << "Response status code: " << statusCode << "\r\n";

    // Examine the contents of the file.
    sb.LoadFile(targetPath,"utf-8");
    std::cout << sb.getAsString() << "\r\n";

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

    // Delete the local target file.
    CkFileAccess fac;
    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.get_LastStatus();
    if (statusCode == 0) {
        // Unable to either send the request or get the response.
        std::cout << http.lastErrorText() << "\r\n";
    }
    else {
        // We got a response, and we already know it wasn't a 200 success response.
        // It should be a 404 not found.
        std::cout << "Response status code: " << statusCode << "\r\n";
        // Examine the response body.
        std::cout << "Response body:" << "\r\n";
        std::cout << http.lastResponseBody() << "\r\n";
    }
    }