Java

Google Contacts - Delete a Contact

See more Google APIs Examples

Demonstrates how to delete a Google Contact. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthGoogle;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.Rest;
import com.chilkatsoft.chilkat2.StringBuilder;
import com.chilkatsoft.chilkat2.Xml;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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

        JsonObject jsonToken = new JsonObject();
        try {
            jsonToken.loadFile("qa_data/tokens/googleContacts.json");
        } catch (ChilkatException e) {
            System.out.println("Failed to load googleContacts.json");
            return;
        }

        AuthGoogle gAuth = new AuthGoogle();
        gAuth.setAccessToken(jsonToken.stringOf("access_token"));

        Rest rest = new Rest();

        // Connect using TLS.
        boolean bAutoReconnect = true;
        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");

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

        StringBuilder sbResponseBody = new StringBuilder();
        try {
            rest.fullRequestNoBodySb("GET", sbPath.getAsString(), sbResponseBody);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // A successful response will have a status code equal to 200.
        if (rest.getResponseStatusCode() != 200) {
            System.out.println("response status code = " + rest.getResponseStatusCode());
            System.out.println("response status text = " + rest.getResponseStatusText());
            System.out.println("response header: " + rest.getResponseHeader());
            System.out.println("response body: " + sbResponseBody.getAsString());
            return;
        }

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

        System.out.println(xml.getXml());
        System.out.println("-------------------");

        // Get the etag:
        String lastKnownEtag = xml.getAttrValue("gd:etag");
        System.out.println("lastKnownEtag = " + lastKnownEtag);
        System.out.println("-------------------");

        // 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..
        try {
            rest.fullRequestNoBodySb("DELETE", sbPath.getAsString(), sbResponseBody);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // A successful response will have a status code equal to 200.
        if (rest.getResponseStatusCode() != 200) {
            System.out.println("response status code = " + rest.getResponseStatusCode());
            System.out.println("response status text = " + rest.getResponseStatusText());
            System.out.println("response header: " + rest.getResponseHeader());
            System.out.println("response body: " + sbResponseBody.getAsString());
            System.out.println("request header: " + rest.getLastRequestHeader());
            return;
        }

        // The response body for a successful DELETE is empty.
        System.out.println("Response Body: (should be empty)");
        System.out.println(sbResponseBody.getAsString());
        System.out.println("Success.");
    }
}