Как реализовать Facebook в реальном времени обновления подписки с обратного вызова URL

Question

Как реализовать Facebook Realtime API

Answer 1

1. Настроить приложение Facebook, а затем установить приложение на Facebook страниц/пользователей, которые вы хотите обновления для.

2. Нам нужно поддерживать URL-адрес обратного вызова для Facebook, чтобы иметь возможность отправлять обновления. осуществление Джерси основы в качестве примера:

    @Path("/social/facebook/update") 
        public class FacebookRealtimeAPIResource 
        { 
         private static final String HUB_MODE = "hub.mode"; 
         private static final String HUB_CHALLENGE = "hub.challenge"; 
         private static final String HUB_VERIFY_TOKEN = "hub.verify_token"; 
   
         public FacebookRealtimeAPIResource() 
         { 
          // any desired implementation here 
         } 
   
         @GET 
         @Produces(MediaType.TEXT_HTML) 
         public void validateFacebookRequest(
         @DefaultValue("") @QueryParam(HUB_MODE) String hubMode, 
         @DefaultValue("") @QueryParam(HUB_CHALLENGE) String hubChallenge, 
         @DefaultValue("") @QueryParam(HUB_VERIFY_TOKEN) String hubVerifyToken, 
         @Context HttpServletRequest request, 
         @Context HttpServletResponse response) 
         { 
   
          try 
          { 
           // hubVerifyToken based validation if desired  
           response.setStatus(HttpServletResponse.SC_OK); 
           response.getWriter().write(hubChallenge); 
           response.getWriter().flush(); 
           response.getWriter().close(); 
          } 
          catch (IOException exc) 
          { 
           throw new WebApplicationException(Response.Status.BAD_REQUEST); 
          } 
         } 
   
         @POST 
         @Consumes(MediaType.APPLICATION_JSON) 
         public void processFacebookRealtimeUpdate(@Context HttpServletRequest request, InputStream inputStream) 
         { 
          StringBuilder sb = new StringBuilder(); 
          String newLine = System.getProperty("line.separator"); 
          String line; 
          String json = ""; 
   
          try 
          { 
           BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, request.getCharacterEncoding())); 
           while ((line = reader.readLine()) != null) 
           sb.append(line).append(newLine); 
          } 
          catch (Exception exc) 
          { 
           throw new WebApplicationException(Response.Status.BAD_REQUEST); 
          } 
          json = sb.toString(); // use this json string for desired purpose 
         } 
        } 
   

3. Установите приложение для страницы, а затем подписаться на обновления страницы

    public class FacebookRealtimeSubscriber 
        { 
         private AccessToken appAccessToken = null; 
         private String appSecret = // your app secret 
         private String userAccessToken = // access token for user that owns the page, generated using your app 
         private String applicationId = // your application id 
         private String callbackURL = "<your context root>/social/facebook/update"; 
         private String pageName = // page name you want to install app for 
         private FacebookClient client = null; 
         private final String subscribedAppsEdge = "/subscribed_apps"; 
         private final String appSubscriptions = "/subscriptions"; 
         private final String verifyToken = "AnyRandomVerifyToken"; 
         // below are all the fields that can be subscribed for page object 
         private final String pageFields = "feed,ratings,name,picture,category,description,founded,company_overview,conversations,mission,products,general_info,location,hours,parking,public_transit,phone,email,website,attire,payment_options,culinary_team,general_manager,price_range,restaurant_services,restaurant_specialties,videos,release_date,genre,starring,screenplay_by,directed_by,produced_by,studio,awards,plot_outline,network,season,schedule,written_by,band_members,hometown,current_location,record_label,booking_agent,press_contact,artists_we_like,influences,band_interests,bio,affiliation,birthday,personal_info,personal_interests,members,built,features,mpg,checkins,productlists"; 
   
         public static void main(String[] args) 
         { 
          new FacebookRealtimeSubscriber().subscribe(); 
         } 
   
         private void subscribe() 
         { 
          String pageAccessToken = ""; 
          String pageId = ""; 
          client = new DefaultFacebookClient(Version.VERSION_2_3); 
          appAccessToken = client.obtainAppAccessToken(applicationId, appSecret); 
          client = new DefaultFacebookClient(userAccessToken, Version.VERSION_2_3); 
          Connection<Account> pages = client.fetchConnection("me/accounts", Account.class); 
          List<Account> accounts = pages.getData(); 
          for (Account account : accounts) 
          { 
           if (pageName.equals(account.getName())) 
           { 
            pageAccessToken = account.getAccessToken(); 
            pageId = account.getId(); 
           } 
          } 
          client = new DefaultFacebookClient(pageAccessToken, appSecret, Version.VERSION_2_3); 
          // subscribe app for page 
          Object obj = client.publish(pageId + subscribedAppsEdge, JsonObject.class, Parameter.with("id", Long.valueOf(pageId))); 
          System.out.println(obj.toString()); 
          // list subscriptions for app 
          obj = client.fetchObject(pageId + subscribedAppsEdge, JsonObject.class); 
          System.out.println(obj.toString()); 
          // subscribe for page updates for app 
          client = new DefaultFacebookClient(appAccessToken.getAccessToken(), appSecret, Version.VERSION_2_3); 
          obj = client.publish(applicationId + appSubscriptions, 
          JsonObject.class, 
          Parameter.with("object", "page"), 
          Parameter.with("callback_url", callbackURL), 
          Parameter.with("fields", pageFields), 
          Parameter.with("verify_token", verifyToken)); 
          System.out.println(obj); 
          // get subscriptions for app 
          obj = client.fetchObject(applicationId + appSubscriptions, JsonObject.class); 
          System.out.println(obj); 
         } 
        }