C++

Manually Follow HTTP Redirects

See more HTTP Examples

Demonstrates how to manually follow redirects for an HTTP GET. C++

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

void ChilkatSample(void)
    {
    bool success = false;

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

    CkHttp http;

    // The FollowRedirects property controls whether redirects
    // are automatically followed.  The default behavior is to
    // automatically follow redirects.

    // Explicitly set FollowRedirects so that redirects are NOT automatically taken:
    http.put_FollowRedirects(false);

    CkHttpResponse resp;
    success = http.HttpNoBody("GET","http://yandex.ru/",resp);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    int status = resp.get_StatusCode();
    std::cout << "HTTP Response Status: " << status << "\r\n";

    // The FinalRedirectUrl property will contain the redirect URL
    // If FollowRedirects was equal to true, then all of the 
    // intermediate redirects (if any) would be followed until
    // there were no more redirects.  However, because 
    // FollowRedirects is not true, FinalRedirectUrl contains
    // the next redirect URL.

    int loopCount = 0;

    while ((status == 302)) {

        std::cout << "Redirect URL: " << http.finalRedirectUrl() << "\r\n";

        const char *nextUrl = http.finalRedirectUrl();
        success = http.HttpNoBody("GET",nextUrl,resp);
        if (success == false) {
            std::cout << http.lastErrorText() << "\r\n";
            return;
        }

        status = resp.get_StatusCode();
        std::cout << "HTTP Response Status: " << status << "\r\n";

        // For safety, prevent infinite loops by
        // keeping a loopCount and only allows following a max 
        // of 10 redirects:
        loopCount = loopCount + 1;
        if (loopCount > 10) {
            std::cout << "Too many redirects." << "\r\n";
            return;
        }

    }
    }