C++

Download a Zip from a URL and OpenBd. (No .zip file is created)

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Demonstrates how to download a .zip from a URL, opens the Zip, and gets the contents of a file. No file is ever written. C++

#include <CkHttp.h>
#include <CkBinData.h>
#include <CkZip.h>
#include <CkZipEntry.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkHttp http;

    CkBinData bd;

    // This URL is valid and can be tested...
    success = http.QuickGetBd("https://chilkatdownload.com/example_data/hamlet.zip",bd);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    CkZip zip;

    // Open the zip from the bytes contained in bd.
    success = zip.OpenBd(bd);
    if (success == false) {
        std::cout << zip.lastErrorText() << "\r\n";
        return;
    }

    // Get the entry for the file we want..
    CkZipEntry entry;
    success = zip.EntryOf("hamlet.xml",entry);
    if (success == false) {
        std::cout << zip.lastErrorText() << "\r\n";
        return;
    }

    // Convert all line endings to CRLF (if needed)
    int lineEndingBehavior = 2;
    const char *xmlStr = entry.unzipToString(lineEndingBehavior,"utf-8");
    if (entry.get_LastMethodSuccess() == false) {
        std::cout << entry.lastErrorText() << "\r\n";
        return;
    }

    // The XML in this case is about 274K, so let's just examine the last 20 lines...
    CkStringBuilder sb;
    sb.Append(xmlStr);

    std::cout << sb.lastNLines(20,true) << "\r\n";
    }