apache httpclient 4.x - Android: Scheme 'http' not registered on ICS 4.0.4 w/ proxy

Question

I'm using HttpClient for HTTPS requests, which has worked fine up until now. After upgrading to ICS, some users are reporting problems connecting on 3G connections.

EDIT: Most of them seem to be using a proxy, and I can reproduce this locally with a T-Mobile SIM using their proxy.

The logs have this stack trace:

java.lang.IllegalStateException: Scheme 'http' not registered.
org.apache.http.conn.scheme.SchemeRegistry.getScheme(SchemeRegistry.java:80)
org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:126)
org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)

Our endpoint is HTTPS only, so we do not register a HTTP endpoint in our SchemeRegistry on purpose. There isn't anywhere (AFAIK) where we redirect to HTTP.

Here is the code that sets up the HttpClient for the HTTPS client:

    DefaultHttpClient ret = null;

    // sets up parameters
    HttpParams params = new BasicHttpParams();
    HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);
    HttpProtocolParams.setContentCharset(params, "utf-8");
    params.setBooleanParameter("http.protocol.expect-continue", false);

    HttpConnectionParams.setConnectionTimeout(params, DEFAULT_CONN_TIMEOUT_MSEC);
    HttpConnectionParams.setSoTimeout(params, timeoutMsec);
    HttpConnectionParams.setStaleCheckingEnabled(params, true);

    SchemeRegistry registry = new SchemeRegistry();
    final SocketFactory sslSocketFactory = getPreferredSSLSocketFactory();
    registry.register(new Scheme("https", sslSocketFactory, 443));

    ThreadSafeClientConnManager manager = new ThreadSafeClientConnManager(params, registry);
    ret = new DefaultHttpClient(manager, params);
    // for preemptive authentication
    // http://dlinsin.blogspot.com/2009/08/http-basic-authentication-with-android.html
    ret.addRequestInterceptor(preemptiveAuth, 0);
    ret.setCookieStore(communalCookieJar);

    SimpleCredentialsProvider credProvider = new SimpleCredentialsProvider(getAccountPreferences());
    ret.setCredentialsProvider(credProvider);

    return ret;

Note: We share this HttpClient instance among multiple threads.

Answer 1

From your stacktrace, i would suggest that you register both ( http, https ) and see if that does not work.

You should be able to debug it by including the apache source jars - drill down on the trace @SchemeRegistry.getScheme().

This thread may help.

Below is tested OK on ICS... Sample SSL ConnectionMgr on androidhttpclient libs:

static X509TrustManager tm = new X509TrustManager() {

        public void checkClientTrusted(X509Certificate[] xcs, String string) throws CertificateException {
        }

        public void checkServerTrusted(X509Certificate[] xcs, String string) throws CertificateException {
        }

        public X509Certificate[] getAcceptedIssuers() {
        return null;
        }
};

MyConnectionManager(SchemeRegistry scheme){
    super(scheme);
}

public static MyConnectionManager getInstance() {
    if (instance == null){

        SSLContext ctx=null;
        try {
            ctx = SSLContext.getInstance("TLS");
            ctx.init(null, new TrustManager[]{tm}, null);
        } catch (NoSuchAlgorithmException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (KeyManagementException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }                   
        SchemeRegistry schemeRegistry = new SchemeRegistry();
        schemeRegistry.register( new Scheme("http", 80,PlainSocketFactory.getSocketFactory()));
        schemeRegistry.register(new Scheme("https", 443, SSLSocketFactory.getSocketFactory()));
        instance = new MyConnectionManager(schemeRegistry);
         // Increase max total connection to 200
         instance.setMaxTotal(15);
         // Increase default max connection per route to 20
         instance.setDefaultMaxPerRoute(15);
         // Increase max connections for localhost:80 to 50
         HttpHost localhost = new HttpHost("picasaweb.google.com", 443);
         instance.setMaxForRoute(new HttpRoute(localhost), 10);
    }
    return instance;
}