I got the authorization code following this document. But when I tried to get access token, I always got errors. Can anyone help me ?
public String AccessTok
For me your request is fine, I tried it using Curl, I also get a 'HTTP/1.1 400 Bad Request' with the reason why it failed 'invalid_grant' :
curl -X POST https://www.googleapis.com/oauth2/v4/token -d 'code=4/SVisuz_x*********************&client_id=*******************7vet.apps.googleusercontent.com&client_secret=***************&redirect_uri=https://oauth2-login-demo.appspot.com/code&grant_type=authorization_code'
I receive (HTTP/1.1 400 Bad Request) :
{
"error": "invalid_grant",
"error_description": "Code was already redeemed."
}
Now using HttpClient from Apache :
URL obj = new URL(authURL);
HttpClient client = HttpClientBuilder.create().build();
HttpPost post = new HttpPost(authURL);
post.addHeader("Content-Type", "application/x-www-form-urlencoded");
post.addHeader("Host", "www.googleapis.com");
post.setEntity(new StringEntity(strBuild.toString()));
HttpResponse resp = client.execute(post);
System.out.println(resp.getStatusLine());
System.out.println(EntityUtils.toString(resp.getEntity()));
I see in my console :
HTTP/1.1 400 Bad Request
{
"error": "invalid_grant",
"error_description": "Code was already redeemed."
}
Are you sure the code you are using is still valid ? Can you try with a new one ?