Question

我正在通过点击http和https链接的混合来测试HttpClient 4.2。

HttpClient似乎坚持第一次调用的协议。如果第一个呼叫是http，则所有后续的https呼叫都会失败，但http呼叫很好。反之亦然。

这是我使用的测试代码。

@Test
public void testNoRedirectMixed() throws ClientProtocolException, IOException {
    HttpClient httpclient = new DefaultHttpClient();
    httpclient=WebClientDevWrapper.wrapClient(httpclient);
    HttpClientParams.setRedirecting(httpclient.getParams(), false);

    {
    HttpGet httpget = new HttpGet("http://www.hotmail.com");
    HttpResponse response = httpclient.execute(httpget);
    HttpEntity entity = response.getEntity();
    assertTrue(EntityUtils.toString(entity).indexOf("com")>0);
    }

    try {
    HttpGet httpget = new HttpGet("https://www.hotmail.com");
    HttpResponse response = httpclient.execute(httpget);
    HttpEntity entity = response.getEntity();

    }catch (Exception e) {
        e.printStackTrace();
    }

    {
    HttpGet httpget = new HttpGet("http://www.baidu.com");
    HttpResponse response = httpclient.execute(httpget);
    HttpEntity entity = response.getEntity();
    assertTrue(EntityUtils.toString(entity).indexOf("com")>0);
    }
}

第二个请求（https）将失败，但百度请求没问题。

引起：org.apache.http.HttpException：无法建立路由：planned = {s} - ＆gt; https://www.hotmail.com; current = {s} - ＆gt; http://www.hotmail.com 在org.apache.http.impl.client.DefaultRequestDirector.establishRoute（DefaultRequestDirector.java:842）

我还必须禁用重定向，因为Hotmail会重定向请求：http://www.hotmail.com - ＆gt; https://www.hotmail.com或https://www.hotmail.com - ＆gt; https://www.live.com。在任何一种情况下都会抛出类似的错误。

包装器如下所示。它用于接受所有证书。

public class WebClientDevWrapper {

    public static HttpClient wrapClient(HttpClient base) {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            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 new X509Certificate[]{};
                }
            };
            ctx.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx);
                ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager ccm = base.getConnectionManager();
            SchemeRegistry sr = ccm.getSchemeRegistry();
            sr.register(new Scheme("https", ssf, 443));
            DefaultHttpClient client= new DefaultHttpClient(ccm, base.getParams());
            return client;
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }
}

Answer 1

HttpClient应该能够绝对透明地管理用户的连接。此问题可能是由4.2版本（see HTTPCLIENT-1193）中引入的回归引起的。

在发布4.2.1版本之前，使用PoolingConnectionManager或SingleConnectionManager而不是默认值。

Answer 2

您正尝试使用一个连接与多个不同的站点进行通信。 AFAIR您必须为每个唯一网站创建新连接（==新客户）。

HTTPClient无法在https和http之间建立路由

2 个答案: