Mega Code Archive
Implements HttpClient
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//package com.dahl.brendan.wordsearch.util;
/*
* Copyright (C) 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.io.IOException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.params.HttpClientParams;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.PlainSocketFactory;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.tsccm.ThreadSafeClientConnManager;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.params.HttpProtocolParams;
import org.apache.http.protocol.BasicHttpContext;
import org.apache.http.protocol.BasicHttpProcessor;
import org.apache.http.protocol.HttpContext;
/**
* <p>Subclass of the Apache {@link DefaultHttpClient} that is configured with
* reasonable default settings and registered schemes for Android, and
* also lets the user add {@link HttpRequestInterceptor} classes.
* Don't create this directly, use the {@link #newInstance} factory method.</p>
* <p/>
* <p>This client processes cookies but does not retain them by default.
* To retain cookies, simply add a cookie store to the HttpContext:
* <pre>context.setAttribute(ClientContext.COOKIE_STORE, cookieStore);</pre>
* </p>
*/
public final class AndroidHttpClient implements HttpClient {
public static final AndroidHttpClient client = AndroidHttpClient.newInstance("wordsearch");
/**
* Set if HTTP requests are blocked from being executed on this thread
*/
private static final ThreadLocal<Boolean> sThreadBlocked =
new ThreadLocal<Boolean>();
/**
* Interceptor throws an exception if the executing thread is blocked
*/
private static final HttpRequestInterceptor sThreadCheckInterceptor =
new HttpRequestInterceptor() {
public void process(HttpRequest request, HttpContext context) {
if (Boolean.TRUE.equals(sThreadBlocked.get())) {
throw new RuntimeException("This thread forbids HTTP requests");
}
}
};
/**
* Create a new HttpClient with reasonable defaults (which you can update).
*
* @param userAgent to report in your HTTP requests.
* @return AndroidHttpClient for you to use for all your requests.
*/
public static AndroidHttpClient newInstance(String userAgent) {
HttpParams params = new BasicHttpParams();
// Turn off stale checking. Our connections break all the time anyway,
// and it's not worth it to pay the penalty of checking every time.
HttpConnectionParams.setStaleCheckingEnabled(params, false);
// Default connection and socket timeout of 20 seconds. Tweak to taste.
HttpConnectionParams.setConnectionTimeout(params, 20 * 1000);
HttpConnectionParams.setSoTimeout(params, 20 * 1000);
HttpConnectionParams.setSocketBufferSize(params, 8192);
// Don't handle redirects -- return them to the caller. Our code
// often wants to re-POST after a redirect, which we must do ourselves.
HttpClientParams.setRedirecting(params, false);
HttpClientParams.setAuthenticating(params, false);
// Set the specified user agent and register standard protocols.
HttpProtocolParams.setUserAgent(params, userAgent);
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
// schemeRegistry.register(new Scheme("https", SSLSocketFactory.getSocketFactory(), 443));
ClientConnectionManager manager = new ThreadSafeClientConnManager(params, schemeRegistry);
// We use a factory method to modify superclass initialization
// parameters without the funny call-a-static-method dance.
return new AndroidHttpClient(manager, params);
}
private final HttpClient delegate;
private AndroidHttpClient(ClientConnectionManager ccm, HttpParams params) {
this.delegate = new DefaultHttpClient(ccm, params) {
@Override
protected BasicHttpProcessor createHttpProcessor() {
// Add interceptor to prevent making requests from main thread.
BasicHttpProcessor processor = super.createHttpProcessor();
processor.addRequestInterceptor(sThreadCheckInterceptor);
return processor;
}
@Override
protected HttpContext createHttpContext() {
// Same as DefaultHttpClient.createHttpContext() minus the
// cookie store.
HttpContext context = new BasicHttpContext();
context.setAttribute(ClientContext.AUTHSCHEME_REGISTRY, getAuthSchemes());
context.setAttribute(ClientContext.COOKIESPEC_REGISTRY, getCookieSpecs());
context.setAttribute(ClientContext.CREDS_PROVIDER, getCredentialsProvider());
return context;
}
};
}
/**
* Release resources associated with this client. You must call this,
* or significant resources (sockets and memory) may be leaked.
*/
public void close() {
getConnectionManager().shutdown();
}
public HttpParams getParams() {
return delegate.getParams();
}
public ClientConnectionManager getConnectionManager() {
return delegate.getConnectionManager();
}
public HttpResponse execute(HttpUriRequest request) throws IOException {
return delegate.execute(request);
}
public HttpResponse execute(HttpUriRequest request, HttpContext context) throws IOException {
return delegate.execute(request, context);
}
public HttpResponse execute(HttpHost target, HttpRequest request) throws IOException {
return delegate.execute(target, request);
}
public HttpResponse execute(HttpHost target, HttpRequest request,
HttpContext context) throws IOException {
return delegate.execute(target, request, context);
}
public <T> T execute(HttpUriRequest request, ResponseHandler<? extends T> responseHandler) throws IOException {
return delegate.execute(request, responseHandler);
}
public <T> T execute(HttpUriRequest request, ResponseHandler<? extends T> responseHandler, HttpContext context)
throws IOException {
return delegate.execute(request, responseHandler, context);
}
public <T> T execute(HttpHost target, HttpRequest request, ResponseHandler<? extends T> responseHandler)
throws IOException {
return delegate.execute(target, request, responseHandler);
}
public <T> T execute(HttpHost target, HttpRequest request,
ResponseHandler<? extends T> responseHandler,
HttpContext context)
throws IOException {
return delegate.execute(target, request, responseHandler, context);
}
}
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