C++

Google Contacts - Delete a Contact

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Demonstrates how to delete a Google Contact. C++

#include <CkJsonObject.h>
#include <CkAuthGoogle.h>
#include <CkRest.h>
#include <CkStringBuilder.h>
#include <CkXml.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.

    //  --------------------------------------------------------------------------------------------------------
    //  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

    CkJsonObject jsonToken;
    success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json");
    if (success != true) {
        std::cout << "Failed to load googleContacts.json" << "\r\n";
        return;
    }

    CkAuthGoogle gAuth;
    gAuth.put_AccessToken(jsonToken.stringOf("access_token"));

    CkRest rest;

    //  Connect using TLS.
    bool bAutoReconnect = true;
    success = rest.Connect("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("GData-Version","3.0");

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

    CkStringBuilder sbResponseBody;
    success = rest.FullRequestNoBodySb("GET",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    //  A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body: " << sbResponseBody.getAsString() << "\r\n";
        return;
    }

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

    std::cout << xml.getXml() << "\r\n";
    std::cout << "-------------------" << "\r\n";

    //  Get the etag:
    const char *lastKnownEtag = xml.getAttrValue("gd:etag");
    std::cout << "lastKnownEtag = " << lastKnownEtag << "\r\n";
    std::cout << "-------------------" << "\r\n";

    //  To delete, send the following:

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

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

    //  The sbPath already contains the correct path..
    success = rest.FullRequestNoBodySb("DELETE",sbPath.getAsString(),sbResponseBody);
    if (success != true) {
        std::cout << rest.lastErrorText() << "\r\n";
        return;
    }

    //  A successful response will have a status code equal to 200.
    if (rest.get_ResponseStatusCode() != 200) {
        std::cout << "response status code = " << rest.get_ResponseStatusCode() << "\r\n";
        std::cout << "response status text = " << rest.responseStatusText() << "\r\n";
        std::cout << "response header: " << rest.responseHeader() << "\r\n";
        std::cout << "response body: " << sbResponseBody.getAsString() << "\r\n";
        std::cout << "request header: " << rest.lastRequestHeader() << "\r\n";
        return;
    }

    //  The response body for a successful DELETE is empty.
    std::cout << "Response Body: (should be empty)" << "\r\n";
    std::cout << sbResponseBody.getAsString() << "\r\n";
    std::cout << "Success." << "\r\n";
    }