How to generate access token using refresh token through google drive API

Question

I have completed steps of authorization and obtained access token and refresh token   What should I do next to generate access token using refresh token that I have stored through google drive API   I won t be able to use any sdk since I am working on Force com so please suggest the way to implement it directly through the API

User · Answer

If you using Java then follow below code snippet       GoogleCredential refreshTokenCredential   new GoogleCredential Builder   setJsonFactory JSON FACTORY  setTransport HTTP TRANSPORT  setClientSecrets CLIENT ID  CLIENT SECRET  build   setRefreshToken yourOldToken   refreshTokenCredential refreshToken      do not forget to call this String newAccessToken   refreshTokenCredential getAccessToken

User · Answer

Using Post call  worked for me  RestClient restClient   new RestClient    RestRequest request   new RestRequest     request AddQueryParameter  quot client id quot    quot value quot    request AddQueryParameter  quot client secret quot    quot value quot    request AddQueryParameter  quot grant type quot    quot refresh token quot    request AddQueryParameter  quot refresh token quot    quot value quot     restClient BaseUrl   new System Uri  quot https   oauth2 googleapis com token quot    restClient Post request    https   youtu be aHs3edo0-mU

User · Answer

If you want to implement that yourself  the OAuth 2 0 flow for Web Server Applications is documented at https   developers google com accounts docs OAuth2WebServer  in particular you should check the section about using a refresh token   https   developers google com accounts docs OAuth2WebServer refresh

User · Answer

If you are using web api then you should make a http POST call to  URL   https   www googleapis com oauth2 v4 token  with following request body client id   lt YOUR CLIENT ID gt  client secret   lt YOUR CLIENT SECRET gt  refresh token   lt REFRESH TOKEN FOR THE USER gt  grant type  refresh token  refresh token never expires so you can use it any number of times  The response will be a JSON like this       quot access token quot    quot your refreshed access token quot      quot expires in quot   3599     quot scope quot    quot Set of scope which you have given quot      quot token type quot    quot Bearer quot

User · Answer

Just posting my answer in case it helps anyone as I spent an hour to figure it out     First of all two very helpful link related to google api and fetching data from any of google services   https   developers google com analytics devguides config mgmt v3 quickstart web-php  https   developers google com identity protocols OAuth2WebServer  Furthermore  when using the following method    client- gt setAccessToken  token   The  token needs to be the full object returned by the google when making authorization request  not the only access token which you get inside the object so if you get the object lets say     access token   xyz   token type   Bearer   expires in  3600  refresh token   mno   created  1532363626   then you need to give    client- gt setAccessToken    access token   xyz   token type   Bearer   expires in  3600  refresh token   mno   created  1532363626     Not   client- gt setAccessToken  xyz    And then even if your access token is expired  google will refresh it itself by using the refresh token in the access token object

User · Answer

All you need to do is a post request like below  -  POST https   www googleapis com oauth2 v4 token Content-Type  application json       client id    lt client id gt      client secret    lt client secret gt      refresh token    lt refresh token gt      grant type    refresh token

User · Answer

Using ASP Net Post call  this worked for me     StringBuilder getNewToken   new StringBuilder    getNewToken Append  https   www googleapis com oauth2 v4 token                            HttpClient client   new HttpClient    client BaseAddress   new Uri getNewToken ToString                         var values   new Dictionary lt string  string gt                                                   client id    lt Your Client Id gt                                client secret    lt Your Client Secret gt                                refresh token    lt Your Saved Refresh Token gt                                grant type    refresh token                                               var content   new FormUrlEncodedContent values                       var response   await client PostAsync getNewToken ToString    content

User · Answer

It s an old question but seems to me it wasn t completely answered  and I needed this information too so I ll post my answer   If you want to use the Google Api Client Library  then you just need to have an access token that includes the refresh token in it  and then - even though the access token will expire after an hour - the library will refresh the token for you automatically   In order to get an access token with a refresh token  you just need to ask for the offline access type  for example in PHP   client- gt setAccessType  offline     and you will get it  Just keep in mind you will get the access token with the refresh token only in the first authorization  so make sure to save that access token in the first time  and you will be able to use it anytime   Hope that helps anyone  -

User · Answer

POST  oauth2 v4 token   Host  www googleapis com  Headers  Content-length  163  content-type  application x-www-form-urlencoded  RequestBody  client secret              amp grant type refresh token amp refresh token sasasdsa1312dsfsdf amp client id

[authorization] How to generate access token using refresh token through google drive API?

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