(.NET Core C#) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

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// 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

Chilkat.JsonObject jsonToken = new Chilkat.JsonObject();
bool success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json");
if (success != true) {
    Debug.WriteLine("Failed to load googleContacts.json");
    return;
}

Chilkat.AuthGoogle gAuth = new Chilkat.AuthGoogle();
gAuth.AccessToken = jsonToken.StringOf("access_token");

Chilkat.Rest rest = new Chilkat.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");

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

Chilkat.StringBuilder sbResponseBody = new Chilkat.StringBuilder();
success = rest.FullRequestNoBodySb("GET",sbPath.GetAsString(),sbResponseBody);
if (success != true) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// A successful response will have a status code equal to 200.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine("response status code = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("response status text = " + rest.ResponseStatusText);
    Debug.WriteLine("response header: " + rest.ResponseHeader);
    Debug.WriteLine("response body: " + sbResponseBody.GetAsString());
    return;
}

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

Debug.WriteLine(xml.GetXml());
Debug.WriteLine("-------------------");

// Get the etag:
string lastKnownEtag = xml.GetAttrValue("gd:etag");
Debug.WriteLine("lastKnownEtag = " + lastKnownEtag);
Debug.WriteLine("-------------------");

// 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) {
    Debug.WriteLine(rest.LastErrorText);
    return;
}

// A successful response will have a status code equal to 200.
if (rest.ResponseStatusCode != 200) {
    Debug.WriteLine("response status code = " + Convert.ToString(rest.ResponseStatusCode));
    Debug.WriteLine("response status text = " + rest.ResponseStatusText);
    Debug.WriteLine("response header: " + rest.ResponseHeader);
    Debug.WriteLine("response body: " + sbResponseBody.GetAsString());
    Debug.WriteLine("request header: " + rest.LastRequestHeader);
    return;
}

// The response body for a successful DELETE is empty.
Debug.WriteLine("Response Body: (should be empty)");
Debug.WriteLine(sbResponseBody.GetAsString());
Debug.WriteLine("Success.");