(Xojo Plugin) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// 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

Dim jsonToken As New Chilkat.JsonObject
Dim success As Boolean
success = jsonToken.LoadFile("qa_data/tokens/googleContacts.json")
If (success <> True) Then
    System.DebugLog("Failed to load googleContacts.json")
    Return
End If

Dim gAuth As New Chilkat.AuthGoogle
gAuth.AccessToken = jsonToken.StringOf("access_token")

Dim rest As New Chilkat.Rest

// Connect using TLS.
Dim bAutoReconnect As Boolean
bAutoReconnect = True
success = rest.Connect("www.google.com",443,True,bAutoReconnect)

// Provide the authentication credentials (i.e. the access token)
success = rest.SetAuthGoogle(gAuth)

// ----------------------------------------------
// 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

success = rest.AddHeader("GData-Version","3.0")

Dim sbPath As New Chilkat.StringBuilder
success = sbPath.Append("/m8/feeds/contacts/default/full/{contactId}")
// Get the contact having contactId = "5b6d64980b1ed462"
Dim numReplacements As Int32
numReplacements = sbPath.Replace("{contactId}","5b6d64980b1ed462")

Dim sbResponseBody As New Chilkat.StringBuilder
success = rest.FullRequestNoBodySb("GET",sbPath.GetAsString(),sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    System.DebugLog("response status code = " + Str(rest.ResponseStatusCode))
    System.DebugLog("response status text = " + rest.ResponseStatusText)
    System.DebugLog("response header: " + rest.ResponseHeader)
    System.DebugLog("response body: " + sbResponseBody.GetAsString())
    Return
End If

// If the 200 response was received, then the contacts XML is contained
// in the response body.
Dim xml As New Chilkat.Xml
success = xml.LoadSb(sbResponseBody,False)

System.DebugLog(xml.GetXml())
System.DebugLog("-------------------")

// Get the etag:
Dim lastKnownEtag As String
lastKnownEtag = xml.GetAttrValue("gd:etag")
System.DebugLog("lastKnownEtag = " + lastKnownEtag)
System.DebugLog("-------------------")

// To delete, send the following:

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

success = rest.ClearAllHeaders()
success = rest.AddHeader("If-Match",lastKnownEtag)
success = rest.AddHeader("GData-Version","3.0")

// The sbPath already contains the correct path..
success = rest.FullRequestNoBodySb("DELETE",sbPath.GetAsString(),sbResponseBody)
If (success <> True) Then
    System.DebugLog(rest.LastErrorText)
    Return
End If

// A successful response will have a status code equal to 200.
If (rest.ResponseStatusCode <> 200) Then
    System.DebugLog("response status code = " + Str(rest.ResponseStatusCode))
    System.DebugLog("response status text = " + rest.ResponseStatusText)
    System.DebugLog("response header: " + rest.ResponseHeader)
    System.DebugLog("response body: " + sbResponseBody.GetAsString())
    System.DebugLog("request header: " + rest.LastRequestHeader)
    Return
End If

// The response body for a successful DELETE is empty.
System.DebugLog("Response Body: (should be empty)")
System.DebugLog(sbResponseBody.GetAsString())
System.DebugLog("Success.")