C++

Replace/Update a FIle in a .zip

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Demonstrates how to replace/update a file from a .zip. Note: This requires the entire .zip to be rewritten. C++

#include <CkZip.h>
#include <CkZipEntry.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    // First prepare a .zip and write it..
    CkZip zip;

    zip.NewZip("qa_output/abc.zip");

    // Add some files..
    const char *charset = "utf-8";
    zip.AddString("a.txt","aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",charset);
    zip.AddString("b.txt","bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",charset);
    zip.AddString("c.txt","cccccccccccccccccccccccccccccccccccc",charset);

    // Write to qa_output/abc.zip
    // This .zip contains three files: a.txt, b.txt, and c.txt
    success = zip.WriteZipAndClose();

    // -------------------------------------------------------------------
    // Open abc.zip, replace the content of the "b.txt" entry with something else, and re-write.
    CkZip zip2;
    zip2.OpenZip("qa_output/abc.zip");

    CkZipEntry entry;
    if (zip2.EntryOf("b.txt",entry) == true) {
        entry.ReplaceString("This is the new content.  bbbbbbbbbbbbbbbbbbbbbb","utf-8");
    }

    // Write the modified .zip back to "abc.zip"
    success = zip2.WriteZipAndClose();

    std::cout << "success." << "\r\n";
    }