Apache httpComponents HttpClient 4.2.2无法通过Webscarab代理连接到网页

Question

我有一个方法，它使用Apache httpComponents HttpClient类通过Webscarab代理连接到网页。我从Apache Software Foundation here获得了这个方法。下面是我的hole方法：

       public void HTTPGet(){
            //HttpHost proxy = new HttpHost("localhost", 8008);

            System.setProperty("http.proxyHost", "localhost");
            System.setProperty("http.proxyPort", "8008");

            HttpHost proxy = new HttpHost(System.getProperty("http.proxyHost", "localhost"),Integer.parseInt(System.getProperty("http.proxyPort", "8008")));
                
            DefaultHttpClient httpclient = new DefaultHttpClient();
            try {

                httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
                        proxy);

                HttpHost target = new HttpHost("www.google.gr/", 80);
                HttpGet req = new HttpGet("/");

                System.out.println("executing request to " + target + " via "
                        + proxy);
                HttpResponse rsp = httpclient.execute(target, req); //here I get the exception as below
                HttpEntity entity = rsp.getEntity();

                System.out.println("----------------------------------------");
                System.out.println(rsp.getStatusLine());
                Header[] headers = rsp.getAllHeaders();
                for (int i = 0; i < headers.length; i++) {
                    System.out.println(headers[i]);
                }
                System.out.println("----------------------------------------");

                if (entity != null) {
                    System.out.println(EntityUtils.toString(entity));
                }

            } catch (IOException ex) {
                Logger.getLogger(WebBrowser.class.getName()).log(Level.SEVERE, null, ex);
            } 
            finally {
                // When HttpClient instance is no longer needed,
                // shut down the connection manager to ensure
                // immediate deallocation of all system resources
                httpclient.getConnectionManager().shutdown();
            }
      }

HttpResponse rsp = httpclient.execute(target, req);之前的println，

返回这个：executing request to http://www.google.gr/:80 via http://localhost:8008

那么下面的异常就会发生。

Nov 28, 2012 1:23:09 AM student.WebBrowser HTTPGet
SEVERE: null
org.apache.http.conn.HttpHostConnectException: Connection to http://localhost:8008 refused
at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:190)
at org.apache.http.impl.conn.ManagedClientConnectionImpl.open(ManagedClientConnectionImpl.java:294)
at org.apache.http.impl.client.DefaultRequestDirector.tryConnect(DefaultRequestDirector.java:640)
at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:479)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:906)
at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:827)

当我尝试从其他浏览器访问页面时，Webscarab会正确干扰，比如火狐、Chrome或JavaFX webengine。

提前谢谢。

Answer 1

由于连接被拒绝，我只能假设WebScarab没有侦听您尝试连接的端口(在您尝试连接的时候)。

例如，WebScarab没有运行，或者您已将其配置为在默认8008以外的端口上侦听，或者在本地主机(127.0.0.1)的不同接口上侦听。

你的代码和WebScarab运行在同一台机器上吗？如果不是这样，您需要让WebScarab侦听可通过网络访问的实际网络接口，并更新您的代码以引用该IP地址而不是本地主机。