Sample code for 30+ languages & platforms
C

Configure OAuth 2.0 Authentication for REST

See more REST Examples

Demonstrates Rest.SetAuthOAuth2, which associates an OAuth2 provider containing a valid access token so Chilkat adds the bearer token to the Authorization header.

Background. OAuth 2.0 bearer-token authentication attaches the access token to each request. The token is typically obtained separately through an OAuth 2.0 authorization flow before being assigned to the provider.

Chilkat C Downloads

C
#include <C_CkRest.h>
#include <C_CkOAuth2.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkRest rest;
    BOOL bTls;
    BOOL bAutoReconnect;
    HCkOAuth2 oauth2;
    const char *responseText;

    success = FALSE;

    rest = CkRest_Create();
    bTls = TRUE;
    bAutoReconnect = TRUE;
    success = CkRest_Connect(rest,"example.com",443,bTls,bAutoReconnect);
    if (success == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        return;
    }

    //  Configure OAuth 2.0 bearer-token authentication.  The provider must contain a valid access token.
    oauth2 = CkOAuth2_Create();
    //  Normally you would not hard-code secrets in source.  You should instead obtain them from an
    //  interactive prompt, environment variable, or a secrets vault.
    CkOAuth2_putAccessToken(oauth2,"OAUTH2_ACCESS_TOKEN");

    //  Associate the provider so Chilkat adds the bearer token to the Authorization header.
    success = CkRest_SetAuthOAuth2(rest,oauth2);
    if (success == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkOAuth2_Dispose(oauth2);
        return;
    }

    responseText = CkRest_fullRequestNoBody(rest,"GET","/api/resource");
    if (CkRest_getLastMethodSuccess(rest) == FALSE) {
        printf("%s\n",CkRest_lastErrorText(rest));
        CkRest_Dispose(rest);
        CkOAuth2_Dispose(oauth2);
        return;
    }

    printf("%s\n",responseText);


    CkRest_Dispose(rest);
    CkOAuth2_Dispose(oauth2);

    }