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我正在使用apache commons 4.x HTTPClient向HEAD请求URI以获取该链接的最终302后URL位置。例如:http://bit.ly/test1231真的指向cnn.com或其他东西。使用HttpClient在服务器中实现这一点的最佳和最有效的方法是什么?现在我遇到了这样的问题,即每隔x分钟,所有线程都会冻结,同时尝试将连接从池中取出,并全部超时。Apache HTTPClient HEAD请求的最高性能?
我打算有100个工作线程进行抓取,所以我使用了Threaded连接管理器。
UPDATE这里是代码我使用的是得到一个HttpClient的对象
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 5000);
HttpConnectionParams.setSoTimeout(httpParams, 5000);
ConnManagerParams.setMaxTotalConnections(httpParams, 5000);
HttpProtocolParams.setVersion(httpParams, HttpVersion.HTTP_1_1);
ConnManagerParams.setMaxConnectionsPerRoute(httpParams, new ConnPerRoute() {
@Override
public int getMaxForRoute(HttpRoute route) {
return 35;
}
});
emptyCookieStore = new CookieStore() {
@Override
public void addCookie(Cookie cookie) {
}
ArrayList<Cookie> emptyList = new ArrayList<Cookie>();
@Override
public List<Cookie> getCookies() {
return emptyList;
}
@Override
public boolean clearExpired(Date date) {
return false;
}
@Override
public void clear() {
}
};
// set request params
httpParams.setParameter("http.protocol.cookie-policy", CookiePolicy.BROWSER_COMPATIBILITY);
httpParams.setParameter("http.useragent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)");
httpParams.setParameter("http.language.Accept-Language", "en-us");
httpParams.setParameter("http.protocol.content-charset", "UTF-8");
httpParams.setParameter("Accept", "application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5");
httpParams.setParameter("Cache-Control", "max-age=0");
SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
schemeRegistry.register(new Scheme("https", PlainSocketFactory.getSocketFactory(), 443));
final ClientConnectionManager cm = new ThreadSafeClientConnManager(httpParams,schemeRegistry);
DefaultHttpClient httpClient = new DefaultHttpClient(cm, httpParams);
httpClient.getParams().setParameter("http.conn-manager.timeout", 120000L);
httpClient.getParams().setParameter("http.protocol.wait-for-continue", 10000L);
httpClient.getParams().setParameter("http.tcp.nodelay", true);
感谢oleg,我已更新以显示我的代码... I目前它已经设置为每个主机35,但是如果我有100个线程都试图在同一时间bit.ly,也许我应该使用100? – James 2010-09-05 16:45:18
通常建议使用与每个路由最大连接数相同的工作线程数。 – oleg 2010-09-05 17:05:58
我应该setConnectionStaleCheckingEnabled设置为false?如果是这样,使用httpclient 4.x如何完成? – James 2010-09-05 18:27:51