Lua

Google Contacts - Delete a Contact

See more Google APIs Examples

Demonstrates how to delete a Google Contact. Lua

local chilkat = require("chilkat")

-- 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

local jsonToken = chilkat.JsonObject.new()
local success = jsonToken:load_file("qa_data/tokens/googleContacts.json")
if not success then
    print("Failed to load googleContacts.json")
    return
end

local gAuth = chilkat.AuthGoogle.new()
gAuth.access_token = jsonToken:string_of("access_token")

local rest = chilkat.Rest.new()

-- Connect using TLS.
local bAutoReconnect = true
success = rest:connect("www.google.com", 443, true, bAutoReconnect)

-- Provide the authentication credentials (i.e. the access token)
rest:set_auth_google(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:add_header("GData-Version", "3.0")

local sbPath = chilkat.StringBuilder.new()
sbPath:append("/m8/feeds/contacts/default/full/{contactId}")
-- Get the contact having contactId = "5b6d64980b1ed462"
local numReplacements = sbPath:replace("{contactId}", "5b6d64980b1ed462")

local sbResponseBody = chilkat.StringBuilder.new()
success = rest:full_request_no_body_sb("GET", sbPath:get_as_string(), sbResponseBody)
if not success then
    print(rest.last_error_text)
    return
end

-- A successful response will have a status code equal to 200.
if rest.response_status_code ~= 200 then
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response body: " .. sbResponseBody:get_as_string())
    return
end

-- If the 200 response was received, then the contacts XML is contained
-- in the response body.
local xml = chilkat.Xml.new()
xml:load_sb(sbResponseBody, false)

print(xml:get_xml())
print("-------------------")

-- Get the etag:
local lastKnownEtag = xml:get_attr_value("gd:etag")
print("lastKnownEtag = " .. lastKnownEtag)
print("-------------------")

-- To delete, send the following:

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

rest:clear_all_headers()
rest:add_header("If-Match", lastKnownEtag)
rest:add_header("GData-Version", "3.0")

-- The sbPath already contains the correct path..
success = rest:full_request_no_body_sb("DELETE", sbPath:get_as_string(), sbResponseBody)
if not success then
    print(rest.last_error_text)
    return
end

-- A successful response will have a status code equal to 200.
if rest.response_status_code ~= 200 then
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response body: " .. sbResponseBody:get_as_string())
    print("request header: " .. rest.last_request_header)
    return
end

-- The response body for a successful DELETE is empty.
print("Response Body: (should be empty)")
print(sbResponseBody:get_as_string())
print("Success.")