具有身份验证的服务器上的 ECONNRESET（由对等方重置连接）

Question

这是我的下载代码：

            File file = new File(dir, fileName);
            HttpClient httpclient = new DefaultHttpClient();
            HttpResponse response = httpclient.execute(downloadListHttpGet
                    .get(index));
            InputStream input = response.getEntity().getContent();
            OutputStream output = new FileOutputStream(
                    memoryDirectory + fileName);

            byte data[] = new byte[1024];
            int count;

            while ((count = input.read(data)) != -1) {

                    output.write(data, 0, count);

            }

            output.flush();
            output.close();
            input.close();

此代码工作正常，但使用经过身份验证的服务器，从下载开始近 40 秒后，我得到“ECONNRESET（对等连接重置）”异常。我认为它发生在“input.read（data）”部分。找了好多！！！有人说是服务器故障。这可能是真的，但我必须在客户端解决这个问题。我试图在“catch”块中运行新线程，但有一个问题：发生异常时，它不会立即进入“catch”块，大约需要 2 分钟。我试过这个解决方案： Getting "SocketException : Connection reset by peer" in Android 但它不起作用。

Answer 1

尝试使用getHttpClient()这个类，而不是new DefaultHttpClient()：

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.HttpVersion;
import org.apache.http.client.HttpClient;
import org.apache.http.client.params.HttpClientParams;
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.conn.ssl.SSLSocketFactory;
import org.apache.http.conn.ssl.X509HostnameVerifier;
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.HTTP;

public class MySSLSocketFactory extends SSLSocketFactory {
    SSLContext sslContext = SSLContext.getInstance("TLS");
    public static int ConnectionTimeoutInSeconds = 45;
    public static boolean DisableSSLcertificateCheck = true;

    public MySSLSocketFactory(KeyStore truststore) throws NoSuchAlgorithmException, KeyManagementException, KeyStoreException, UnrecoverableKeyException {
        super(truststore);

        TrustManager tm = new X509TrustManager() {
            public void checkClientTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public void checkServerTrusted(X509Certificate[] chain, String authType) throws CertificateException {
            }

            public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return null;
            }

        };

        sslContext.init(null, new TrustManager[] { tm }, null);
    }

    @Override
    public Socket createSocket(Socket socket, String host, int port, boolean autoClose) throws IOException, UnknownHostException {
        return sslContext.getSocketFactory().createSocket(socket, host, port, autoClose);
    }

    @Override
    public Socket createSocket() throws IOException {
        return sslContext.getSocketFactory().createSocket();
    }

    public static HttpClient getHttpClient() {
        try {

            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, ConnectionTimeoutInSeconds * 1000);
            HttpConnectionParams.setSoTimeout(params, ConnectionTimeoutInSeconds * 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);

            SSLSocketFactory mySSLSocketFactory = SSLSocketFactory.getSocketFactory();

            // disable ssl check on debug
            if (DisableSSLcertificateCheck ) {
                KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
                trustStore.load(null, null);
                mySSLSocketFactory = new MySSLSocketFactory(trustStore);
                HostnameVerifier hostnameVerifier = org.apache.http.conn.ssl.SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER;
                mySSLSocketFactory.setHostnameVerifier((X509HostnameVerifier) hostnameVerifier);
            }

            SchemeRegistry schemeRegistry = new SchemeRegistry();
            schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
            schemeRegistry.register(new Scheme("https", mySSLSocketFactory, 443));
            ClientConnectionManager manager = new ThreadSafeClientConnManager(params, schemeRegistry);

            return new DefaultHttpClient(manager, params);
        } catch (Exception e) {
            return new DefaultHttpClient();
        }
    }

}

它处理 SSL，使您可以忽略 SSL 证书并允许您手动更改超时。 我将从“禁用 ssl 检查”开始并将超时设置为 90（秒）。

您可能尝试的另一种身份验证方式与 Bing 搜索 API 身份验证的工作方式相同（您需要下载并包含 commons-codec-1.9.jar）：

public class SearchAsyncTask extends AsyncTask<Void, Void, Void> {

private final String TAG = getClass().getName();

@Override
protected Void doInBackground(Void... params) {
    try {
        String bingUrl = "https://api.datamarket.azure.com/Bing/SearchWeb/v1/Web?Query=pinhassi";

        String accountKey = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
        byte[] accountKeyBytes = Base64.encodeBase64((accountKey + ":" + accountKey).getBytes());
        String accountKeyEnc = new String(accountKeyBytes);

        URL url = null;
        url = new URL(bingUrl);

        URLConnection urlConnection = url.openConnection();
        urlConnection.setRequestProperty("Authorization", "Basic " + accountKeyEnc);
        InputStream response = urlConnection.getInputStream();
        String res = readStream(response);
        Log.d(TAG, res);
        //conn.disconnect();

    } catch (Exception e) {
        e.printStackTrace();
        Log.e(TAG, e.getMessage());
    }

    return null;
}

private String readStream(InputStream in) {
    BufferedReader reader = null;
    StringBuilder sb = new StringBuilder();
    try {
        reader = new BufferedReader(new InputStreamReader(in));
        String line = "";
        while ((line = reader.readLine()) != null) {
            //System.out.println(line);
            sb.append(line + "\n");
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (reader != null) {
            try {
                reader.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
    return sb.toString();
}

}