Example usage for org.apache.commons.httpclient.contrib.proxy ProxyDetectionException ProxyDetectionException

Introduction

In this page you can find the example usage for org.apache.commons.httpclient.contrib.proxy ProxyDetectionException ProxyDetectionException.

Prototype

public ProxyDetectionException(String message) 

Source Link

Document

Creates a new ProxyDetectionException with the specified detail message.

Usage

From source file:org.apache.commons.httpclient.contrib.proxy.PluginProxyUtil.java

/**
 * Use Sun-specific internal plugin proxy classes for 1.3.X
 * Look around for the 1.3.X plugin proxy detection class. Without it,
 * cannot autodetect...//from   ww  w . j a v  a 2s .co  m
 *
 * @param sampleURL the URL to check proxy settings for
 * @return ProxyHost the host and port of the proxy that should be used
 * @throws ProxyDetectionException if detection failed
 */
private static HttpHost detectProxySettingsJDK13(URL sampleURL) throws ProxyDetectionException {
    HttpHost result = null;
    try {
        // Attempt to discover proxy info by asking internal plugin
        // code to locate proxy path to server sampleURL...
        Class<?> pluginProxyHandler = Class.forName("sun.plugin.protocol.PluginProxyHandler");
        Method getDefaultProxyHandlerMethod = pluginProxyHandler.getDeclaredMethod("getDefaultProxyHandler",
                (Class[]) null);
        Object proxyHandlerObj = getDefaultProxyHandlerMethod.invoke(null, (Object[]) null);
        if (proxyHandlerObj != null) {
            Class<?> proxyHandlerClass = proxyHandlerObj.getClass();
            Method getProxyInfoMethod = proxyHandlerClass.getDeclaredMethod("getProxyInfo",
                    new Class[] { URL.class });
            Object proxyInfoObject = getProxyInfoMethod.invoke(proxyHandlerObj, new Object[] { sampleURL });
            if (proxyInfoObject != null) {
                Class<?> proxyInfoClass = proxyInfoObject.getClass();
                Method getProxyMethod = proxyInfoClass.getDeclaredMethod("getProxy", (Class[]) null);
                boolean useProxy = (getProxyMethod.invoke(proxyInfoObject, (Object[]) null) != null);
                if (useProxy) {
                    String proxyIP = (String) getProxyMethod.invoke(proxyInfoObject, (Object[]) null);
                    Method getProxyPortMethod = proxyInfoClass.getDeclaredMethod("getPort", (Class[]) null);
                    Integer portInteger = (Integer) getProxyPortMethod.invoke(proxyInfoObject, (Object[]) null);
                    int proxyPort = portInteger.intValue();
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("1.3.X: proxy=" + proxyIP + " port=" + proxyPort);
                    }
                    result = new HttpHost(proxyIP, proxyPort);
                } else {
                    if (LOG.isDebugEnabled()) {
                        LOG.debug("1.3.X reported NULL for " + "proxyInfo.getProxy (no proxy assumed)");
                    }
                    result = NO_PROXY_HOST;
                }
            } else {
                if (LOG.isDebugEnabled()) {
                    LOG.debug("NULL proxyInfo in 1.3.X auto proxy " + "detection, (no proxy assumed)");
                }
                result = NO_PROXY_HOST;
            }
        } else {
            throw new ProxyDetectionException("Sun Plugin 1.3.X failed to provide a default proxy handler");
        }
    } catch (RuntimeException e) {
        throw e;
    } catch (Exception e) {
        LOG.debug("Sun Plugin 1.3.X proxy detection class not " + "found, will try failover detection" /*, e*/);
    }
    return result;
}

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