Get Size of Download using HTTP HEAD

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

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

#include <C_CkHttp.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkHttpResponse resp;
    const char * sizeStr;

    http = CkHttp_Create();

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

    resp = CkHttp_GetHead(http,"http://www.chilkatsoft.com/download/ChilkatDotNet2.msi");
    if (resp == 0 ) {
        printf("%s\n",CkHttp_lastErrorText(http));
    }
    else {

        sizeStr = CkHttpResponse_getHeaderField(resp,"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);
        }

    }



    CkHttp_Dispose(http);

    }