Java

Find Contact Having Email Address

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Demonstrates how to fetch the Google Contact for a given email address. Chilkat2 Java

import com.chilkatsoft.chilkat2.AuthGoogle;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.FileAccess;
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 retrieve the contacts, we need to send the following:

        //     GET /m8/feeds/contacts/default/full?q=<emailAddress>
        //     GData-Version: 3.0

        // Get the contact (or contacts) with this email address:
        String emailAddressToFind = "admin@chilkatsoft.com";

        rest.addHeader("GData-Version", "3.0");
        rest.addQueryParam("q", emailAddressToFind);

        StringBuilder sbResponseBody = new StringBuilder();
        try {
            rest.fullRequestNoBodySb("GET", "/m8/feeds/contacts/default/full", 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);

        // See below for a sample response body.
        xml.saveXml("qa_output/google_contacts.xml");

        // Now let's parse the XML...

        // Get the the total number of results, the start index, and the items per page.
        // We'll likely NOT get the full list, but will instead get the 1st page.
        int totalResults = xml.getChildIntValue("openSearch:totalResults");
        int startIndex = xml.getChildIntValue("openSearch:startIndex");
        int itemsPerPage = xml.getChildIntValue("openSearch:itemsPerPage");
        System.out.println("totalResults = " + totalResults);
        System.out.println("startIndex = " + startIndex);
        System.out.println("itemsPerPage = " + itemsPerPage);

        // We'll borrow a method from FileAccess to get the contactId from the URL string (see the code in the while loop)
        FileAccess fac = new FileAccess();

        // Iterate over each contact.
        int numEntries = xml.numChildrenHavingTag("entry");
        int i = 0;
        while (i < numEntries) {
            xml.setI(i);
            System.out.println((i + 1) + " ----");
            System.out.println("title: " + xml.getChildContent("entry[i]|title"));

            // The entry "id" child contains a URL having this format:
            // <id>http://www.google.com/m8/feeds/contacts/{userEmail}/base/{contactId}</id>
            // Let's get the URL and parse the contactId from it..
            String idUrl = xml.getChildContent("entry[i]|id");
            System.out.println("id: " + idUrl);

            // Use the parsing ability of GetFileName to get the contactId
            String contactId = fac.getFileName(idUrl);
            System.out.println("contactId: " + contactId);

            String fullName;
            try {
                fullName = xml.chilkatPath("entry[i]|gd:name|gd:fullName|*");
            } catch (ChilkatException e) {
                fullName = null;
            }
            if (fullName != null) {
                System.out.println("fullName: " + fullName);
            }

            String emailAddress;
            try {
                emailAddress = xml.chilkatPath("entry[i]|gd:email|(address)");
            } catch (ChilkatException e) {
                emailAddress = null;
            }
            if (emailAddress != null) {
                System.out.println("email address: " + emailAddress);
            }

            i = i + 1;
        }
    }
}