Get Size of Download using HTTP HEAD

Get the size of a download using an HTTP HEAD request.

Download Chilkat C/C++ Libraries for VC++ 9.0 / Win32

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Download Chilkat C/C++ Libraries for VC++ 6.0 / Win32

Download Chilkat C/C++ Libraries for VC++ 6.0, Win 95/98/NT4 Compatible

#include <CkHttp.h>
#include <CkHttpResponse.h>

void ChilkatSample(void)
    {
    CkHttp http;

    bool success;

    //  Any string unlocks the component for the 1st 30-days.
    success = http.UnlockComponent("Anything for 30-day trial.");
    if (success != true) {
        printf("%s\n",http.lastErrorText());
        return;
    }

    CkHttpResponse *resp = 0;

    resp = http.GetHead("http://www.chilkatsoft.com/download/ChilkatDotNet2.msi");
    if (resp == 0 ) {
        printf("%s\n",http.lastErrorText());
    }
    else {
        const char * sizeStr;
        sizeStr = resp->getHeaderField("Content-Length");
        if (sizeStr == 0 ) {
            printf("No content-length header field\n");
        }
        else {
            //  Show the size of the file.
            //  You may convert the size string to an integer...
            printf("%s\n",sizeStr);
        }

    }


    }