Java Facebook Api Authentication

Java Facebook Api Authentication

Java security technology provides the developer with a comprehensive security framework for writing applications, and also provides the user or administrator with a set of tools to securely manage applications. A request will be sent back as response to the client browser with the callback url. Facebook on validation success will respond back with accesstoken. Class loaders ensure that untrusted code cannot interfere with the running of other Java programs. Facebook will validate the application ID and then will redirect to its login page. Oracle Technology Network Java Java SE jaas . Sign In Sign Up—Free Trial Country/Region Call . A sequence diagram given below explains the flow of control in authentication using Facebook OAuth. High-level Features Low-level Features Benefits References Platform Security Built-in language security features enforced by the Java compiler and virtual machine: Strong data typing Automatic memory management Bytecode verification Secure class loading Provides a safe and secure platform for developing and running applications. After logging in to under Apps menu click Create a New App . Full support for HTTPS over SSL/TLS is also included. The browser does the request. The Java security APIs span a wide range of areas, including cryptography, public key infrastructure, secure communication, authentication, and access control. 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Following is the page the Facebook issues a redirect request to the browser. java.io.IOException: Server returned HTTP response code: 400 for URL: graph.facebook.com/me?accesstoken=XXXXXX&expires=XXXXXXXXXXX at com.javapapers.java.social.facebook.FBGraph.getFBGraph(FBGraph.java:38) at com.javapapers.java.social.facebook.MainMenu.service(MainMenu.java:28) & can u help me out from this problem. Access Facebook Graph Profile Data. Application redirect URL. package com.javapapers.java.social.facebook; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; import java.net.URLEncoder; public class FBConnection { public static final String FBAPPID = "234231262685378"; public static final String FBAPPSECRET = "y2a73dede3n49uid13502f5ab8cdt390"; public static final String REDIRECTURI = " static String accessToken = ""; public String getFBAuthUrl() { String fbLoginUrl = ""; try { fbLoginUrl = " + "clientid=" + FBConnection.FBAPPID + "&redirecturi=" + URLEncoder.encode(FBConnection.REDIRECTURI, "UTF-8") + "&scope=email"; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return fbLoginUrl; } public String getFBGraphUrl(String code) { String fbGraphUrl = ""; try { fbGraphUrl = " + "clientid=" + FBConnection.FBAPPID + "&redirecturi=" + URLEncoder.encode(FBConnection.REDIRECTURI, "UTF-8") + "&clientsecret=" + FBAPPSECRET + "&code=" + code; } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return fbGraphUrl; } public String getAccessToken(String code) { if ("".equals(accessToken)) { URL fbGraphURL; try { fbGraphURL = new URL(getFBGraphUrl(code)); } catch (MalformedURLException e) { e.printStackTrace(); throw new RuntimeException("Invalid code received " + e); } URLConnection fbConnection; StringBuffer b = null; try { fbConnection = fbGraphURL.openConnection(); BufferedReader in; in = new BufferedReader(new InputStreamReader( fbConnection.getInputStream())); String inputLine; b = new StringBuffer(); while ((inputLine = in.readLine()) != null) b.append(inputLine + "n"); in.close(); } catch (IOException e) { e.printStackTrace(); throw new RuntimeException("Unable to connect with Facebook " + e); } accessToken = b.toString(); if (accessToken.startsWith("{")) { throw new RuntimeException("ERROR: Access Token Invalid: " + accessToken); } } return accessToken; } }. On access of an url or in welcome page the Facebook Login button is shown. We need to create a web application in Facebook. deepak says: 04/09/2014 at 11:50 am joe it is giving 404 error fbhome not found deepak says: 04/09/2014 at 12:55 pm joe i have done it thanks deepak says: 04/09/2014 at 2:45 pm joe, the appid and appsecret i have created work only for one user how can i get different user detials. Apart from Spring Social I couldnt find any reputable Java SDK for Facebook integration. but when i login with other account its showing the blank page. Bytecode verification ensures code conforms to the JVM specification and prevents hostile code from corrupting the runtime environment. Comments are closed for this "Java Facebook Login with OAuth Authentication" tutorial.. Java Facebook Login "> . You are getting error at the last step, when you get profile data. Recent support (in JDK 5) for timestamped signatures makes it easier to deploy signed code by avoiding the need to re-sign code when the signer's certificate expires. Thank you Sandeep Singh says: 18/07/2014 at 2:21 am Thanks Joe . Redirect URL page will again call the Facebook to request for user data by sending the accesstoken. Redirect URL page will forward to a page showing user data in the client browser. Get only the firstname and see if it works. Recent support (in JDK 5) for OCSP provides a more scalable and timely method for applications to check certificate revocation status. All Rights Reserved. On click of that button a Facebook URL will be invoked 5a02188284