Visual FoxPro

Google Contacts - Delete a Contact

See more Google APIs Examples

Demonstrates how to delete a Google Contact. Visual FoxPro

LOCAL lnSuccess
LOCAL loJsonToken
LOCAL loGAuth
LOCAL loRest
LOCAL lnBAutoReconnect
LOCAL loSbPath
LOCAL lnNumReplacements
LOCAL loSbResponseBody
LOCAL loXml
LOCAL lcLastKnownEtag

lnSuccess = 0

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

loRest = CreateObject('Chilkat.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 update a contact, we'll first get the contact information
* to get the etag.

* To retrieve the contact, send the following:
* 	GET /m8/feeds/contacts/default/full/{contactId}
* 	GData-Version: 3.0

loRest.AddHeader("GData-Version","3.0")

loSbPath = CreateObject('Chilkat.StringBuilder')
loSbPath.Append("/m8/feeds/contacts/default/full/{contactId}")
* Get the contact having contactId = "5b6d64980b1ed462"
lnNumReplacements = loSbPath.Replace("{contactId}","5b6d64980b1ed462")

loSbResponseBody = CreateObject('Chilkat.StringBuilder')
lnSuccess = loRest.FullRequestNoBodySb("GET",loSbPath.GetAsString(),loSbResponseBody)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    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 loSbPath
    RELEASE loSbResponseBody
    CANCEL
ENDIF

* If the 200 response was received, then the contacts XML is contained
* in the response body.
loXml = CreateObject('Chilkat.Xml')
loXml.LoadSb(loSbResponseBody,0)

? loXml.GetXml()
? "-------------------"

* Get the etag:
lcLastKnownEtag = loXml.GetAttrValue("gd:etag")
? "lastKnownEtag = " + lcLastKnownEtag
? "-------------------"

* To delete, send the following:

* 	DELETE /m8/feeds/contacts/default/full/{contactId}
* 	If-Match: {lastKnownEtag}
* 	GData-Version: 3.0

loRest.ClearAllHeaders()
loRest.AddHeader("If-Match",lcLastKnownEtag)
loRest.AddHeader("GData-Version","3.0")

* The sbPath already contains the correct path..
lnSuccess = loRest.FullRequestNoBodySb("DELETE",loSbPath.GetAsString(),loSbResponseBody)
IF (lnSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    RELEASE loSbResponseBody
    RELEASE loXml
    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()
    ? "request header: " + loRest.LastRequestHeader
    RELEASE loJsonToken
    RELEASE loGAuth
    RELEASE loRest
    RELEASE loSbPath
    RELEASE loSbResponseBody
    RELEASE loXml
    CANCEL
ENDIF

* The response body for a successful DELETE is empty.
? "Response Body: (should be empty)"
? loSbResponseBody.GetAsString()
? "Success."

RELEASE loJsonToken
RELEASE loGAuth
RELEASE loRest
RELEASE loSbPath
RELEASE loSbResponseBody
RELEASE loXml