Dart
Dart
Google Contacts - Retrieve All Contacts
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Demonstrates how to retrieve the full list of contacts for the Google Contacts API.Chilkat Dart Downloads
import 'package:chilkat/chilkat.dart';
void main() {
// 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
final jsonToken = CkJsonObject();
try {
jsonToken.loadFile('qa_data/tokens/googleContacts.json');
} on ChilkatException {
print('Failed to load googleContacts.json');
return;
}
final gAuth = CkAuthGoogle();
gAuth.accessToken = jsonToken.stringOf('access_token');
final rest = CkRest();
// Connect using TLS.
final 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
// GData-Version: 3.0
rest.addHeader('GData-Version', '3.0');
final sbResponseBody = CkStringBuilder();
try {
rest.fullRequestNoBodySb('GET', '/m8/feeds/contacts/default/full', sbResponseBody);
} on ChilkatException catch (e) {
print(e.lastErrorText);
return;
}
// A successful response will have a status code equal to 200.
if (rest.responseStatusCode != 200) {
print('response status code = ${rest.responseStatusCode}');
print('response status text = ${rest.responseStatusText}');
print('response header: ${rest.responseHeader}');
print('response body: ${sbResponseBody.getAsString()}');
return;
}
// If the 200 response was received, then the contacts XML is contained
// in the response body.
final xml = CkXml();
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.
final totalResults = xml.getChildIntValue('openSearch:totalResults');
final startIndex = xml.getChildIntValue('openSearch:startIndex');
final itemsPerPage = xml.getChildIntValue('openSearch:itemsPerPage');
print('totalResults = $totalResults');
print('startIndex = $startIndex');
print('itemsPerPage = $itemsPerPage');
// We'll borrow a method from FileAccess to get the contactId from the URL string (see the code in the while loop)
final fac = CkFileAccess();
// Iterate over each contact.
final numEntries = xml.numChildrenHavingTag('entry');
var i = 0;
while (i < numEntries) {
xml.i = i;
print('${i + 1} ----');
print('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..
final idUrl = xml.getChildContent('entry[i]|id');
print('id: $idUrl');
// Use the parsing ability of GetFileName to get the contactId
final contactId = fac.getFileName(idUrl);
print('contactId: $contactId');
try {
final fullName = xml.chilkatPath('entry[i]|gd:name|gd:fullName|*');
print('fullName: $fullName');
} on ChilkatException {
// xml.chilkatPath() failed; continue anyway.
}
try {
final emailAddress = xml.chilkatPath('entry[i]|gd:email|(address)');
print('email address: $emailAddress');
} on ChilkatException {
// xml.chilkatPath() failed; continue anyway.
}
i++;
}
// The response body XML looks something like this:
// <feed xmlns="http://www.w3.org/2005/Atom"
// xmlns:openSearch="http://a9.com/-/spec/opensearch/1.1/"
// xmlns:gContact="http://schemas.google.com/contact/2008"
// xmlns:batch="http://schemas.google.com/gdata/batch"
// xmlns:gd="http://schemas.google.com/g/2005"
// gd:etag="feedEtag">
// <id>userEmail</id>
// <updated>2008-12-10T10:04:15.446Z</updated>
// <category scheme="http://schemas.google.com/g/2005#kind" term="http://schemas.google.com/contact/2008#contact"/>
// <link rel="http://schemas.google.com/g/2005#feed" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full"/>
// <link rel="http://schemas.google.com/g/2005#post" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full"/>
// <link rel="http://schemas.google.com/g/2005#batch" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full/batch"/>
// <link rel="self" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full?max-results=25"/>
// <author>
// <name>User</name>
// <email>userEmail</email>
// </author>
// <generator version="1.0" uri="http://www.google.com/m8/feeds">
// Contacts
// </generator>
// <openSearch:totalResults>349</openSearch:totalResults>
// <openSearch:startIndex>1</openSearch:startIndex>
// <openSearch:itemsPerPage>25</openSearch:itemsPerPage>
// <entry gd:etag="contactEtag">
// <id>
// http://www.google.com/m8/feeds/contacts/userEmail/base/contactId
// </id>
// <updated>2008-12-10T04:45:03.331Z</updated>
// <app:edited xmlns:app="http://www.w3.org/2007/app">2008-12-10T04:45:03.331Z</app:edited>
// <category scheme="http://schemas.google.com/g/2005#kind"
// term="http://schemas.google.com/contact/2008#contact"/>
// <title>Fitzwilliam Darcy</title>
// <gd:name>
// <gd:fullName>Fitzwilliam Darcy</gd:fullName>
// </gd:name>
// <link rel="http://schemas.google.com/contacts/2008/rel#photo" type="image/*"
// href="https://www.google.com/m8/feeds/photos/media/userEmail/contactId"
// gd:etag="photoEtag"/>
// <link rel="self" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full/contactId"/>
// <link rel="edit" type="application/atom+xml"
// href="https://www.google.com/m8/feeds/contacts/userEmail/full/contactId"/>
// <gd:phoneNumber rel="http://schemas.google.com/g/2005#home"
// primary="true">
// 456
// </gd:phoneNumber>
// <gd:extendedProperty name="pet" value="hamster"/>
// <gContact:groupMembershipInfo deleted="false"
// href="http://www.google.com/m8/feeds/groups/userEmail/base/groupId"/>
// <gd:email rel="http://schemas.google.com/g/2005#other" address="darcyf@example.com" primary="true" />
// </entry>
// <!-- Other entries ... -->
// </feed>
//
}