{"id":14199,"date":"2014-06-22T19:19:45","date_gmt":"2014-06-22T13:49:45","guid":{"rendered":"http:\/\/www.tothenew.com\/blog\/?p=14199"},"modified":"2014-06-22T20:32:43","modified_gmt":"2014-06-22T15:02:43","slug":"oauth-2-0-using-grails-part-2","status":"publish","type":"post","link":"https:\/\/www.tothenew.com\/blog\/oauth-2-0-using-grails-part-2\/","title":{"rendered":"OAuth 2.0 using Grails Part \u2013 2"},"content":{"rendered":"

Obtain accessToken from refreshToken<\/strong><\/p>\n

In the previous article OAuth 2.0 using Grails Part \u2013 1<\/a> I have given a detailed explanation regarding user authentication using OAuth 2.0. In this article i will explain how you can obtain access_token from the refresh_token. Please refer to step(3) of part – 1 of this article where we obtained a JSON of the following format :<\/p>\n

[java]
\n{
\n"access_token": {access_token},
\n"token_type": "Bearer",
\n"expires_in": 3600,
\n"refresh_token": {refresh_token},
\n"id_token": {id_token}
\n}
\n[\/java]<\/p>\n

You need to persist the refresh_token in some database because access_token which we have got in the JSON is only valid for 1 hour. A fresh access_token can be obtained with the help of refresh_token. Following method will take persisted refresh_token as a parameter and will return a fresh access_token.<\/p>\n

[java]
\nString getLatestAccessToken(String refreshToken) {
\n String latestToken = ""
\n def http = new HTTPBuilder(‘http:\/\/localhost:8080\/’)
\n http.request(POST) {
\n uri.path = ‘https:\/\/accounts.google.com\/o\/oauth2\/token’
\n requestContentType = "application\/x-www-form-urlencoded"
\n body = [
\nclient_id: "{Client ID}",
\nclient_secret: "{Client Secret}",
\n grant_type: "refresh_token",
\n refresh_token: refreshToken
\n ]
\n response.success = { resp, json ->
\n latestToken = json.access_token
\n }
\n }
\n return latestToken
\n }
\n[\/java]<\/p>\n

In the above code response.success closure contains parameter json which contains the response in the following format:<\/p>\n

[java]
\n{
\n"access_token": {access_token},
\n"token_type": "Bearer",
\n"expires_in": 3600,
\n"id_token": {id_token}
\n}
\n[\/java]<\/p>\n

From this JSON we are obtaining access_token which is again valid for 1 hour only.<\/p>\n","protected":false},"excerpt":{"rendered":"

Obtain accessToken from refreshToken In the previous article OAuth 2.0 using Grails Part \u2013 1 I have given a detailed explanation regarding user authentication using OAuth 2.0. In this article i will explain how you can obtain access_token from the refresh_token. Please refer to step(3) of part – 1 of this article where we obtained […]<\/p>\n","protected":false},"author":102,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"iawp_total_views":1},"categories":[7],"tags":[1446,4840,9],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/14199"}],"collection":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/users\/102"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/comments?post=14199"}],"version-history":[{"count":0,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/posts\/14199\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/media?parent=14199"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/categories?post=14199"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tothenew.com\/blog\/wp-json\/wp\/v2\/tags?post=14199"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}