Lua

Retrieve a Single Contact

See more Google APIs Examples

Demonstrates how to retrieve a single contact (by contactId) for the Google Contacts API. 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 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 = "7b1c7b6409e718a0"
local numReplacements = sbPath:replace("{contactId}", "7b1c7b6409e718a0")

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)

-- See below for a sample response body.
xml:save_xml("qa_output/google_contact.xml")

-- Now let's parse the XML...
print("title: " .. xml:get_child_content("title"))

local emailAddress = xml:chilkat_path("gd:email|(address)")
if xml.last_method_success then
    print("email address: " .. emailAddress)
end

-- The response body XML looks something like this:

--     <?xml version="1.0" encoding="UTF-8" ?>
--     <entry gd:etag="&quot;R3kzezVSLit7I2A9XRFaFE8DQAU.&quot;" xmlns="http://www.w3.org/2005/Atom" xmlns:batch="http://schemas.google.com/gdata/batch" xmlns:gContact="http://schemas.google.com/contact/2008" xmlns:gd="http://schemas.google.com/g/2005">
--         <id>http://www.google.com/m8/feeds/contacts/support%40chilkatcloud.com/base/7b1c7b6409e718a0</id>
--         <updated>2016-11-18T00:41:56.783Z</updated>
--         <app:edited xmlns:app="http://www.w3.org/2007/app">2016-11-18T00:41:56.783Z</app:edited>
--         <category scheme="http://schemas.google.com/g/2005#kind" term="http://schemas.google.com/contact/2008#contact" />
--         <title>Chilkat Cloud</title>
--         <link rel="http://schemas.google.com/contacts/2008/rel#photo" type="image/*" href="https://www.googleapis.com/m8/feeds/photos/media/support%40chilkatcloud.com/7b1c7b6409e718a0" gd:etag="&quot;fgVhPls4Sit7I2BWHUlTWkQMKHUZKHkkaiw.&quot;" />
--         <link rel="self" type="application/atom+xml" href="https://www.googleapis.com/m8/feeds/contacts/support%40chilkatcloud.com/full/7b1c7b6409e718a0" />
--         <link rel="edit" type="application/atom+xml" href="https://www.googleapis.com/m8/feeds/contacts/support%40chilkatcloud.com/full/7b1c7b6409e718a0" />
--         <gd:name>
--             <gd:fullName>Chilkat Cloud</gd:fullName>
--             <gd:givenName>Chilkat</gd:givenName>
--             <gd:familyName>Cloud</gd:familyName>
--         </gd:name>
--         <gd:email rel="http://schemas.google.com/g/2005#other" address="support@chilkatcloud.com" primary="true" />
--         <gContact:groupMembershipInfo deleted="false" href="http://www.google.com/m8/feeds/groups/support%40chilkatcloud.com/base/6" />
--     </entry>