(Node.js) Google Contacts - Retrieve as JSON

Demonstrates how to retrieve Google Contacts as JSON.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // 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

    var jsonToken = new chilkat.JsonObject();
    var success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json");
    if (success !== true) {
        console.log("Failed to load googleContacts.json");
        return;
    }

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

    var rest = new chilkat.Rest();

    // Connect using TLS.
    var 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 retrieve the contacts, we need to send the following:

    // 	GET /m8/feeds/contacts/default/full
    // 	GData-Version: 3.0

    // To get the contacts data in JSON format, set the "alt" query parameter to "json"
    rest.AddQueryParam("alt","json");
    rest.AddHeader("GData-Version","3.0");

    var sbResponseBody = new chilkat.StringBuilder();
    success = rest.FullRequestNoBodySb("GET","/m8/feeds/contacts/default/full",sbResponseBody);
    if (success !== true) {
        console.log(rest.LastErrorText);
        return;
    }

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

    // If the 200 response was received, then the contacts JSON is contained
    // in the response body.
    var json = new chilkat.JsonObject();
    json.LoadSb(sbResponseBody);
    json.EmitCompact = false;

    // Save the pretty-printed JSON response to a file.
    sbResponseBody.Clear();
    json.EmitSb(sbResponseBody);
    sbResponseBody.WriteFile("qa_output/google_contacts.json","utf-8",false);

    // Parse the Google Contacts JSON, and iterate over the contacts..
    var totalResults = json.IntOf("feed.openSearch$totalResults.$t");
    var startIndex = json.IntOf("feed.openSearch$startIndex.$t");
    var itemsPerPage = json.IntOf("feed.openSearch$itemsPerPage.$t");
    console.log("totalResults = " + totalResults);
    console.log("startIndex = " + startIndex);
    console.log("itemsPerPage = " + itemsPerPage);

    var numEntries = json.SizeOfArray("feed.entry");
    var i = 0;
    while (i < numEntries) {
        json.I = i;
        console.log((i+1) + " ----");
        console.log("title: " + json.StringOf("feed.entry[i].title.$t"));

        var fullName = json.StringOf("feed.entry[i].gd$name.gd$fullName.$t");
        if (json.LastMethodSuccess == true) {
            console.log("fullName: " + fullName);
        }

        // There can be multiple email addresses, so it's stored as a JSON array..
        var numEmailAddresses = json.SizeOfArray("feed.entry[i].gd$email");
        var j = 0;
        while (j < numEmailAddresses) {
            var emailAddress = json.StringOf("feed.entry[i].gd$email[j].address");
            if (json.LastMethodSuccess == true) {
                console.log("email address: " + emailAddress);
            }

            j = j+1;
        }

        i = i+1;
    }

    // A sample Google Contacts JSON response:

    // 	{ 
    // 	  "version": "1.0",
    // 	  "encoding": "UTF-8",
    // 	  "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$etag": "\"QHw5eTVSLyt7I2A9XRFaE0kNTwI.\"",
    // 	    "id": { 
    // 	      "$t": "chilkat.support@gmail.com"
    // 	    },
    // 	    "updated": { 
    // 	      "$t": "2016-11-17T01:57:41.221Z"
    // 	    },
    // 	    "category": [
    // 	      { 
    // 	        "scheme": "http://schemas.google.com/g/2005#kind",
    // 	        "term": "http://schemas.google.com/contact/2008#contact"
    // 	      }
    // 	    ],
    // 	    "title": { 
    // 	      "$t": "Chilkat Support's Contacts"
    // 	    },
    // 	    "link": [
    // 	      { 
    // 	        "rel": "alternate",
    // 	        "type": "text/html",
    // 	        "href": "https://www.googleapis.com/"
    // 	      },
    // 	      { 
    // 	        "rel": "http://schemas.google.com/g/2005#feed",
    // 	        "type": "application/atom+xml",
    // 	        "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
    // 	      },
    // 	      { 
    // 	        "rel": "http://schemas.google.com/g/2005#post",
    // 	        "type": "application/atom+xml",
    // 	        "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full"
    // 	      },
    // 	      { 
    // 	        "rel": "http://schemas.google.com/g/2005#batch",
    // 	        "type": "application/atom+xml",
    // 	        "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/batch"
    // 	      },
    // 	      { 
    // 	        "rel": "self",
    // 	        "type": "application/atom+xml",
    // 	        "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json"
    // 	      },
    // 	      { 
    // 	        "rel": "next",
    // 	        "type": "application/atom+xml",
    // 	        "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full?max-results=25&alt=json&start-index=26"
    // 	      }
    // 	    ],
    // 	    "author": [
    // 	      { 
    // 	        "name": { 
    // 	          "$t": "Chilkat Support"
    // 	        },
    // 	        "email": { 
    // 	          "$t": "chilkat.support@gmail.com"
    // 	        }
    // 	      }
    // 	    ],
    // 	    "generator": { 
    // 	      "version": "1.0",
    // 	      "uri": "http://www.google.com/m8/feeds",
    // 	      "$t": "Contacts"
    // 	    },
    // 	    "openSearch$totalResults": { 
    // 	      "$t": "350"
    // 	    },
    // 	    "openSearch$startIndex": { 
    // 	      "$t": "1"
    // 	    },
    // 	    "openSearch$itemsPerPage": { 
    // 	      "$t": "25"
    // 	    },
    // 	    "entry": [
    // 	      { 
    // 	        "id": { 
    // 	          "$t": "http://www.google.com/m8/feeds/contacts/chilkat.support%40gmail.com/base/0"
    // 	        },
    // 	        "gd$etag": "\"SX8zcTVSLyt7I2A9WxBXFU4MQwI.\"",
    // 	        "updated": { 
    // 	          "$t": "2010-01-26T20:07:48.189Z"
    // 	        },
    // 	        "app$edited": { 
    // 	          "xmlns$app": "http://www.w3.org/2007/app",
    // 	          "$t": "2010-01-26T20:07:48.189Z"
    // 	        },
    // 	        "category": [
    // 	          { 
    // 	            "scheme": "http://schemas.google.com/g/2005#kind",
    // 	            "term": "http://schemas.google.com/contact/2008#contact"
    // 	          }
    // 	        ],
    // 	        "title": { 
    // 	          "$t": "Joe Sample"
    // 	        },
    // 	        "link": [
    // 	          { 
    // 	            "rel": "http://schemas.google.com/contacts/2008/rel#photo",
    // 	            "type": "image/*",
    // 	            "href": "https://www.googleapis.com/m8/feeds/photos/media/chilkat.support%40gmail.com/0"
    // 	          },
    // 	          { 
    // 	            "rel": "self",
    // 	            "type": "application/atom+xml",
    // 	            "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
    // 	          },
    // 	          { 
    // 	            "rel": "edit",
    // 	            "type": "application/atom+xml",
    // 	            "href": "https://www.googleapis.com/m8/feeds/contacts/chilkat.support%40gmail.com/full/0"
    // 	          }
    // 	        ],
    // 	        "gd$name": { 
    // 	          "gd$fullName": { 
    // 	            "$t": "Joe Sample"
    // 	          },
    // 	          "gd$givenName": { 
    // 	            "$t": "Joe"
    // 	          },
    // 	          "gd$familyName": { 
    // 	            "$t": "Sample"
    // 	          }
    // 	        },
    // 	        "gd$email": [
    // 	          { 
    // 	            "address": "somebody@gmail.com",
    // 	            "primary": "true",
    // 	            "rel": "http://schemas.google.com/g/2005#other"
    // 	          }
    // 	        ]
    // 	      },
    // 		... more entries ...
    // 	

}

chilkatExample();