Unicode C++

Find Contact Having Email Address

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Demonstrates how to fetch the Google Contact for a given email address. Unicode C++

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

    CkJsonObjectW jsonToken;
    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 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:
    const wchar_t *emailAddressToFind = L"admin@chilkatsoft.com";

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

    CkStringBuilderW sbResponseBody;
    success = rest.FullRequestNoBodySb(L"GET",L"/m8/feeds/contacts/default/full",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);

    // See below for a sample response body.
    xml.SaveXml(L"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(L"openSearch:totalResults");
    int startIndex = xml.GetChildIntValue(L"openSearch:startIndex");
    int itemsPerPage = xml.GetChildIntValue(L"openSearch:itemsPerPage");
    wprintf(L"totalResults = %d\n",totalResults);
    wprintf(L"startIndex = %d\n",startIndex);
    wprintf(L"itemsPerPage = %d\n",itemsPerPage);

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

    // Iterate over each contact.
    int numEntries = xml.NumChildrenHavingTag(L"entry");
    int i = 0;
    while (i < numEntries) {
        xml.put_I(i);
        wprintf(L"%d ----\n",i + 1);
        wprintf(L"title: %s\n",xml.getChildContent(L"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..
        const wchar_t *idUrl = xml.getChildContent(L"entry[i]|id");
        wprintf(L"id: %s\n",idUrl);

        // Use the parsing ability of GetFileName to get the contactId
        const wchar_t *contactId = fac.getFileName(idUrl);
        wprintf(L"contactId: %s\n",contactId);

        const wchar_t *fullName = xml.chilkatPath(L"entry[i]|gd:name|gd:fullName|*");
        if (xml.get_LastMethodSuccess() == true) {
            wprintf(L"fullName: %s\n",fullName);
        }

        const wchar_t *emailAddress = xml.chilkatPath(L"entry[i]|gd:email|(address)");
        if (xml.get_LastMethodSuccess() == true) {
            wprintf(L"email address: %s\n",emailAddress);
        }

        i = i + 1;
    }
    }