C

Get Size of File on Web Server

See more HTTP Examples

Demonstrates how to send a HEAD request to fetch information about a file on a web server, which hopefully includes the Content-Length in the response header. C

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

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

    success = FALSE;

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

    http = CkHttp_Create();

    resp = CkHttpResponse_Create();
    success = CkHttp_HttpNoBody(http,"HEAD","https://nodejs.org/dist/v10.16.1/node-v10.16.1-win-x64.zip",resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        return;
    }

    //  Examine the response header.
    printf("%s\n",CkHttpResponse_header(resp));

    //  Here is a sample response header:

    //  Date: Thu, 01 Aug 2019 12:47:27 GMT
    //  Content-Type: application/zip
    //  Content-Length: 17457922
    //  Connection: keep-alive
    //  Set-Cookie: __cfduid=da5b78dcdd8171683c5a578eb9c9f88c81564663647; expires=Fri, 31-Jul-20 12:47:27 GMT; path=/; domain=.nodejs.org; HttpOnly
    //  Last-Modified: Wed, 31 Jul 2019 18:21:57 GMT
    //  ETag: "5d41dc45-10a6302"
    //  Accept-Ranges: bytes
    //  Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
    //  Server: cloudflare
    //  CF-RAY: 4ff7ebb32ac4e1e2-ORD

    //  Get the Content-Length header.
    contentLengthStr = CkHttpResponse_getHeaderField(resp,"Content-Length");
    //  If the header exists...
    if (CkHttpResponse_getLastMethodSuccess(resp) == TRUE) {
        printf("Content-Length: %s\n",contentLengthStr);
        //  Your application can convert the contentLengthStr to an integer and then use it....
    }



    CkHttp_Dispose(http);
    CkHttpResponse_Dispose(resp);

    }