HttpClient problème avec la poignée de redirection et facebook login sans navigateur

Question

J'ai passé trois semaines pour trouver une solution pour se connecter sur facebook home sans navigateur. J'ai écrit ce code par exemple, mais il renvoie une erreur:

org.apache.commons.httpclient.HttpMethodDirector isRedirectNeeded INFO: Redirect requested but followRedirects is disabled

code:

import java.io.IOException; 
import org.apache.commons.httpclient.Cookie; 
import org.apache.commons.httpclient.Header; 
import org.apache.commons.httpclient.HttpClient; 
import org.apache.commons.httpclient.HttpException; 
import org.apache.commons.httpclient.HttpState; 
import org.apache.commons.httpclient.HttpStatus; 
import org.apache.commons.httpclient.HttpVersion; 
import org.apache.commons.httpclient.NameValuePair; 
import org.apache.commons.httpclient.cookie.CookiePolicy; 
import org.apache.commons.httpclient.methods.GetMethod; 
import org.apache.commons.httpclient.methods.PostMethod; 
import org.apache.commons.httpclient.params.HttpClientParams; 

public class formLogin { 

    public static void main(String[] args) throws HttpException, IOException { 
     // Set target URL 
     String strURL = "http://www.facebook.com/login.php";; 
     System.out.println("Target URL: " + strURL); 

     // Get initial state object 
     HttpState initialState = new HttpState(); 

     // Initial set of cookies can be retrieved from persistent storage 
     // and re-created, using a persistence mechanism of choice, 
     //Cookie mycookie = new Cookie(".foobar.com", "mycookie", "stuff", 
     //  "/", null, false); 

     // and then added to your HTTP state instance 
     //initialState.addCookie(mycookie); 

     // Get HTTP client instance 
     HttpClient httpclient = new HttpClient(); 
     httpclient.getHttpConnectionManager(). 
       getParams().setConnectionTimeout(30000); 

     // do not set preemptive, this forces Basic authentication which is not what we want 
     httpclient.getHostConfiguration().getParams() 
      .setParameter(HttpClientParams.PROTOCOL_VERSION, HttpVersion.HTTP_1_1); 

     httpclient.setState(initialState); 

     // RFC 2101 cookie management spec is used per default 
     // to parse, validate, format & match cookies 
     //httpclient.getParams().setCookiePolicy(CookiePolicy.RFC_2109); 

     // A different cookie management spec can be selected 
     // when desired 
     //httpclient.getParams().setCookiePolicy(CookiePolicy.NETSCAPE); 

     // Netscape Cookie Draft spec is provided for completeness 
     // You would hardly want to use this spec in real life situations 
     httpclient.getParams().setCookiePolicy(CookiePolicy.BROWSER_COMPATIBILITY); 

     // Compatibility policy is provided in order to mimic cookie 
     // management of popular web browsers that is in some areas 
     // not 100% standards compliant 

     // Get HTTP GET method  
     GetMethod httpget = new GetMethod(strURL); 

     // Execute HTTP GET 
     int result = httpclient.executeMethod(httpget); 

     // Display status code 
     System.out.println("Response status code: " + result); 

     // Get all the cookies 
     Cookie[] cookies = httpclient.getState().getCookies(); 

     // Display the cookies 
     System.out.println("Present cookies: "); 
     for (int i = 0; i < cookies.length; i++) { 
      System.out.println(" - " + cookies[i].toExternalForm()); 
     } 

     // Release current connection to the connection pool 
     // once you are done 
     httpget.releaseConnection(); 

     //Cookie ist da und Jetzt wird eingeloggt 

     PostMethod postMethod = new PostMethod("http://facebook.com/login.php"); 

     NameValuePair[] postData = new NameValuePair[2]; 
     postData[0] = new NameValuePair("email", "******"); 
     postData[1] = new NameValuePair("pass", "******"); 

     postMethod.setRequestBody(postData); 
     for(int i = 0; i < cookies.length; i++){ 
      postMethod.setRequestHeader("Cookie:",cookies[i].toExternalForm()); 
     } 

     try { 
      httpclient.executeMethod(postMethod); 
      int statuscode = postMethod.getStatusCode(); 
      System.out.println("STATUS CODE = "+statuscode); 
     } catch (HttpException httpe) { 
      System.err.print("HttpException"); 
      System.err.println(httpe.getMessage()); 
      httpe.printStackTrace(); 
     } catch (IOException ioe) { 
      System.err.print("IOException"); 
      System.err.println(ioe.getMessage()); 
      ioe.printStackTrace(); 
     } 
     String responseBody = postMethod.getResponseBodyAsString(); 
     System.out.println(responseBody); 

     postMethod.releaseConnection(); 
    } 
} 

Est-ce bon code? Que dois-je faire pour suivre une redirection? J'ai déjà essayé avec postmethod.setfollowredirect(true) mais l'erreur persiste.

Answer 1

PostMethod est un EntityEnclosingMethod. L'appel de setFollowRedirect() sur PostMethod ne fonctionnera pas. Voir:

http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html#sec10.3

Peut-être que vous devriez faire une demande de la tête la première, ou peut-être vous pourriez commencer avec une URL différente. Essayez "http://www.facebook.com/login.php" au lieu de l'URL que vous avez.