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(Visual FoxPro) Google Contacts - Retrieve as JSON

Demonstrates how to retrieve Google Contacts as JSON.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loJsonToken
LOCAL lnSuccess
LOCAL loGAuth
LOCAL loRest
LOCAL lnBAutoReconnect
LOCAL loSbResponseBody
LOCAL loJson
LOCAL lnTotalResults
LOCAL lnStartIndex
LOCAL lnItemsPerPage
LOCAL lnNumEntries
LOCAL i
LOCAL lcFullName
LOCAL lnNumEmailAddresses
LOCAL j
LOCAL lcEmailAddress

*  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

loJsonToken = CreateObject('Chilkat_9_5_0.JsonObject')
lnSuccess = loJsonToken.LoadFile("qa_data/tokens/googleContacts.json")
IF (lnSuccess <> 1) THEN
    ? "Failed to load googleContacts.json"
    RELEASE loJsonToken
    CANCEL
ENDIF

loGAuth = CreateObject('Chilkat_9_5_0.AuthGoogle')
loGAuth.AccessToken = loJsonToken.StringOf("access_token")

loRest = CreateObject('Chilkat_9_5_0.Rest')

*  Connect using TLS.
lnBAutoReconnect = 1
lnSuccess = loRest.Connect("www.google.com",443,1,lnBAutoReconnect)

*  Provide the authentication credentials (i.e. the access token)
loRest.SetAuthGoogle(loGAuth)

*  ----------------------------------------------
*  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"
loRest.AddQueryParam("alt","json")
loRest.AddHeader("GData-Version","3.0")

loSbResponseBody = CreateObject('Chilkat_9_5_0.StringBuilder')
lnSuccess = loRest.FullRequestNoBodySb("GET","/m8/feeds/contacts/default/full",loSbResponseBody)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbResponseBody
    CANCEL
ENDIF

*  A successful response will have a status code equal to 200.
IF (loRest.ResponseStatusCode <> 200) THEN
    ? "response status code = " + STR(loRest.ResponseStatusCode)
    ? "response status text = " + loRest.ResponseStatusText
    ? "response header: " + loRest.ResponseHeader
    ? "response body: " + loSbResponseBody.GetAsString()
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbResponseBody
    CANCEL
ENDIF

*  If the 200 response was received, then the contacts JSON is contained
*  in the response body.
loJson = CreateObject('Chilkat_9_5_0.JsonObject')
loJson.LoadSb(loSbResponseBody)
loJson.EmitCompact = 0

*  Save the pretty-printed JSON response to a file.
loSbResponseBody.Clear()
loJson.EmitSb(loSbResponseBody)
loSbResponseBody.WriteFile("qa_output/google_contacts.json","utf-8",0)

*  Parse the Google Contacts JSON, and iterate over the contacts..
lnTotalResults = loJson.IntOf("feed.openSearch$totalResults.$t")
lnStartIndex = loJson.IntOf("feed.openSearch$startIndex.$t")
lnItemsPerPage = loJson.IntOf("feed.openSearch$itemsPerPage.$t")
? "totalResults = " + STR(lnTotalResults)
? "startIndex = " + STR(lnStartIndex)
? "itemsPerPage = " + STR(lnItemsPerPage)

lnNumEntries = loJson.SizeOfArray("feed.entry")
i = 0
DO WHILE i < lnNumEntries
    loJson.I = i
    ? STR(i + 1) + " ----"
    ? "title: " + loJson.StringOf("feed.entry[i].title.$t")

    lcFullName = loJson.StringOf("feed.entry[i].gd$name.gd$fullName.$t")
    IF (loJson.LastMethodSuccess = 1) THEN
        ? "fullName: " + lcFullName
    ENDIF

    *  There can be multiple email addresses, so it's stored as a JSON array..
    lnNumEmailAddresses = loJson.SizeOfArray("feed.entry[i].gd$email")
    j = 0
    DO WHILE j < lnNumEmailAddresses
        lcEmailAddress = loJson.StringOf("feed.entry[i].gd$email[j].address")
        IF (loJson.LastMethodSuccess = 1) THEN
            ? "email address: " + lcEmailAddress
        ENDIF

        j = j + 1
    ENDDO

    i = i + 1
ENDDO

*  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 ...
*  	}

RELEASE loJsonToken
RELEASE loGAuth
RELEASE loRest
RELEASE loSbResponseBody
RELEASE loJson


 

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