(Go) Google Contacts - Delete a Contact

Demonstrates how to delete a Google Contact.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

    // 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

    jsonToken := chilkat.NewJsonObject()
    success := jsonToken.LoadFile("qa_data/tokens/googleContacts.json")
    if success != true {
        fmt.Println("Failed to load googleContacts.json")
        jsonToken.DisposeJsonObject()
        return
    }

    gAuth := chilkat.NewAuthGoogle()
    gAuth.SetAccessToken(*jsonToken.StringOf("access_token"))

    rest := chilkat.NewRest()

    // Connect using TLS.
    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 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

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

    sbPath := chilkat.NewStringBuilder()
    sbPath.Append("/m8/feeds/contacts/default/full/{contactId}")
    // Get the contact having contactId = "5b6d64980b1ed462"
    numReplacements := sbPath.Replace("{contactId}","5b6d64980b1ed462")

    sbResponseBody := chilkat.NewStringBuilder()
    success = rest.FullRequestNoBodySb("GET",*sbPath.GetAsString(),sbResponseBody)
    if success != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.ResponseStatusCode() != 200 {
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response body: ", *sbResponseBody.GetAsString())
        jsonToken.DisposeJsonObject()
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        return
    }

    // If the 200 response was received, then the contacts XML is contained
    // in the response body.
    xml := chilkat.NewXml()
    xml.LoadSb(sbResponseBody,false)

    fmt.Println(*xml.GetXml())
    fmt.Println("-------------------")

    // Get the etag:
    lastKnownEtag := xml.GetAttrValue("gd:etag")
    fmt.Println("lastKnownEtag = ", *lastKnownEtag)
    fmt.Println("-------------------")

    // To delete, send the following:

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

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

    // The sbPath already contains the correct path..
    success = rest.FullRequestNoBodySb("DELETE",*sbPath.GetAsString(),sbResponseBody)
    if success != true {
        fmt.Println(rest.LastErrorText())
        jsonToken.DisposeJsonObject()
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        xml.DisposeXml()
        return
    }

    // A successful response will have a status code equal to 200.
    if rest.ResponseStatusCode() != 200 {
        fmt.Println("response status code = ", rest.ResponseStatusCode())
        fmt.Println("response status text = ", rest.ResponseStatusText())
        fmt.Println("response header: ", rest.ResponseHeader())
        fmt.Println("response body: ", *sbResponseBody.GetAsString())
        fmt.Println("request header: ", rest.LastRequestHeader())
        jsonToken.DisposeJsonObject()
        gAuth.DisposeAuthGoogle()
        rest.DisposeRest()
        sbPath.DisposeStringBuilder()
        sbResponseBody.DisposeStringBuilder()
        xml.DisposeXml()
        return
    }

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

    jsonToken.DisposeJsonObject()
    gAuth.DisposeAuthGoogle()
    rest.DisposeRest()
    sbPath.DisposeStringBuilder()
    sbResponseBody.DisposeStringBuilder()
    xml.DisposeXml()