javascript - How to communicate between servers (Google Cloud Engine -> Google App Engine) using oAuth2 -


first describe how our system looks like. have 2 servers.

the first 1 on google app engine , has logic provides access database android application , has servlets written external communication (more later).

the second 1 on google cloud engine. application written in meteor (to simplify, it's node.js). communicate between servers (gce -> gae). have rest api on servlet endpoint under address e.g. https://appname.appspot.com/admin/upload. when i'm making request without authentication, work fine:

http.get(geturl, {}, getcallback);

however, have no idea how using oauth2 authentication. when go address https://appname.appspot.com/admin/upload browser, redirects me google authentication , works fine (i have account added in google console). how send http request node.js server using oauth2 authentication?

to give more details, here servlet configuration:

<security-constraint>     <display-name>securityconstraint</display-name>     <web-resource-collection>         <web-resource-name>wrcollection</web-resource-name>         <url-pattern>/admin/*</url-pattern>     </web-resource-collection>     <auth-constraint>         <role-name>admin</role-name>     </auth-constraint>     <user-data-constraint>         <transport-guarantee>confidential</transport-guarantee>     </user-data-constraint> </security-constraint>

and

<servlet-mapping>     <servlet-name>uploadrequestservlet</servlet-name>     <url-pattern>/admin/upload</url-pattern> </servlet-mapping>

i know have set server server communication how accomplish using node.js? help? don't know start...

if have problem server-to-server communication (meteor.js server google server) using oauth 2.0 checkout library i've created https://github.com/jagi/meteor-google-oauth-jwt. makes calling google rest api meteor.js server simpler.


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