C

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

See more Zip Examples

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 <C_CkHttp.h>
#include <C_CkBinData.h>
#include <C_CkZip.h>
#include <C_CkZipEntry.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkHttp http;
    HCkBinData bd;
    HCkZip zip;
    HCkZipEntry entry;
    int lineEndingBehavior;
    const char *xmlStr;
    HCkStringBuilder sb;

    success = FALSE;

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

    http = CkHttp_Create();

    bd = CkBinData_Create();

    // This URL is valid and can be tested...
    success = CkHttp_QuickGetBd(http,"https://chilkatdownload.com/example_data/hamlet.zip",bd);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bd);
        return;
    }

    zip = CkZip_Create();

    // Open the zip from the bytes contained in bd.
    success = CkZip_OpenBd(zip,bd);
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bd);
        CkZip_Dispose(zip);
        return;
    }

    // Get the entry for the file we want..
    entry = CkZipEntry_Create();
    success = CkZip_EntryOf(zip,"hamlet.xml",entry);
    if (success == FALSE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bd);
        CkZip_Dispose(zip);
        CkZipEntry_Dispose(entry);
        return;
    }

    // Convert all line endings to CRLF (if needed)
    lineEndingBehavior = 2;
    xmlStr = CkZipEntry_unzipToString(entry,lineEndingBehavior,"utf-8");
    if (CkZipEntry_getLastMethodSuccess(entry) == FALSE) {
        printf("%s\n",CkZipEntry_lastErrorText(entry));
        CkHttp_Dispose(http);
        CkBinData_Dispose(bd);
        CkZip_Dispose(zip);
        CkZipEntry_Dispose(entry);
        return;
    }

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

    printf("%s\n",CkStringBuilder_lastNLines(sb,20,TRUE));


    CkHttp_Dispose(http);
    CkBinData_Dispose(bd);
    CkZip_Dispose(zip);
    CkZipEntry_Dispose(entry);
    CkStringBuilder_Dispose(sb);

    }