(Unicode C++) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

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#include <CkJsonObjectW.h>
#include <CkAuthGoogleW.h>
#include <CkRestW.h>
#include <CkStringBuilderW.h>
#include <CkXmlW.h>

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

    // --------------------------------------------------------------------------------------------------------
    // Note: The code for setting up the Chilkat REST object and making the initial connection can be done once.
    // Once connected, the REST object may be re-used for many REST API calls.
    // (It's a good idea to put the connection setup code in a separate function/subroutine.)
    // --------------------------------------------------------------------------------------------------------

    // It is assumed we previously obtained an OAuth2 access token.
    // This example loads the JSON access token file 
    // saved by this example: Get Google Contacts OAuth2 Access Token

    CkJsonObjectW jsonToken;
    bool success = jsonToken.LoadFile(L"qa_data/tokens/googleContacts.json");
    if (success != true) {
        wprintf(L"Failed to load googleContacts.json\n");
        return;
    }

    CkAuthGoogleW gAuth;
    gAuth.put_AccessToken(jsonToken.stringOf(L"access_token"));

    CkRestW rest;

    // Connect using TLS.
    bool bAutoReconnect = true;
    success = rest.Connect(L"www.google.com",443,true,bAutoReconnect);

    // Provide the authentication credentials (i.e. the access token)
    rest.SetAuthGoogle(gAuth);

    // ----------------------------------------------
    // OK, the REST connection setup is completed..
    // ----------------------------------------------

    // To update a contact, we'll first get the contact information
    // to get the etag.

    // To retrieve the contact, send the following:
    // 	GET /m8/feeds/contacts/default/full/{contactId}
    // 	GData-Version: 3.0

    rest.AddHeader(L"GData-Version",L"3.0");

    CkStringBuilderW sbPath;
    sbPath.Append(L"/m8/feeds/contacts/default/full/{contactId}");
    // Get the contact having contactId = "5b6d64980b1ed462"
    int numReplacements = sbPath.Replace(L"{contactId}",L"5b6d64980b1ed462");

    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestNoBodySb(L"GET",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response body: %s\n",sbResponseBody.getAsString());
        return;
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    CkXmlW xml;
    xml.LoadSb(sbResponseBody,false);

    wprintf(L"%s\n",xml.getXml());
    wprintf(L"-------------------\n");

    // Get the etag:
    const wchar_t *lastKnownEtag = xml.getAttrValue(L"gd:etag");
    wprintf(L"lastKnownEtag = %s\n",lastKnownEtag);
    wprintf(L"-------------------\n");

    // To delete, send the following:

    // 	DELETE /m8/feeds/contacts/default/full/{contactId}
    // 	If-Match: {lastKnownEtag}
    // 	GData-Version: 3.0

    rest.ClearAllHeaders();
    rest.AddHeader(L"If-Match",lastKnownEtag);
    rest.AddHeader(L"GData-Version",L"3.0");

    // The sbPath already contains the correct path..
    success = rest.FullRequestNoBodySb(L"DELETE",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    // A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        wprintf(L"response status code = %d\n",rest.get_ResponseStatusCode());
        wprintf(L"response status text = %s\n",rest.responseStatusText());
        wprintf(L"response header: %s\n",rest.responseHeader());
        wprintf(L"response body: %s\n",sbResponseBody.getAsString());
        wprintf(L"request header: %s\n",rest.lastRequestHeader());
        return;
    }

    // The response body for a successful DELETE is empty.
    wprintf(L"Response Body: (should be empty)\n");
    wprintf(L"%s\n",sbResponseBody.getAsString());
    wprintf(L"Success.\n");
    }