android - HttpsUrlConnection EOFException

Question

我正在使用以下代码进行发布请求

public String executeHttpPost(String uri, String data) {

    HttpURLConnection conn = null;
    URL url = null;
    String s = null;

    try {

        url = new URL(uri);

         conn = (HttpURLConnection) url.openConnection();

        if (conn instanceof HttpsURLConnection) {
            Log.d("HTTPS", "HttpsUrl");
        }

        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setRequestMethod("POST");
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

        OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
        wr.write(data);
        wr.flush();

        DisplayResponseHeaders(conn);

        s = readStream(conn.getInputStream());
        Log.d("body", s);

    } catch (MalformedURLException e) {
        e.printStackTrace();
    } catch (IOException e) {
        s = null;
        e.printStackTrace();
    } finally {
        conn.disconnect();
    }
    return s;
  }

当我通过 http 使用它时，一切正常，但通过 https 我得到

 java.io.EOFException
 at libcore.io.Streams.readAsciiLine(Streams.java:203)
 at libcore.net.http.HttpEngine.readResponseHeaders(HttpEngine.java:573)
 at libcore.net.http.HttpEngine.readResponse(HttpEngine.java:821)
 at libcore.net.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:283)
 libcore.net.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:177)
 libcore.net.http.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:271)
 ru.fors.remsmed.fragment.NetHelper.executeHttpPost(NetHelper.java:234)
 ru.fors.remsmed.LoginActivity$UserLoginTask.doInBackground(LoginActivity.java:424)
 ru.fors.remsmed.LoginActivity$UserLoginTask.doInBackground(LoginActivity.java:1)
 android.os.AsyncTask$2.call(AsyncTask.java:287)
 java.util.concurrent.FutureTask.run(FutureTask.java:234)
 android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230)
 java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
 java.lang.Thread.run(Thread.java:856)
 threadid=14: thread exiting with uncaught exception (group=0x40a71930)

我在 httpsurlconnection 和可能的解决方案中发现了有关回收连接错误的问题:

if (Build.VERSION.SDK != null && Build.VERSION.SDK_INT > 13) {
   conn.setRequestProperty("Connection", "close");
}

但这对我不起作用。

Answer 1

尝试像这样更改您的代码:

    conn.setRequestProperty("Content-Type",
                            "application/x-www-form-urlencoded; charset: UTF-8");
    byte[] output = data.getBytes("UTF-8");
    conn.setFixedLengthStreamingMode(output.length);

    os = conn.getOutputStream();
    os.write(output);
    os.flush();
    os.close();

    DisplayResponseHeaders(conn);

    if (conn.getResponseCode() == 200) { // or other 2xx code like 204

        s = readStream(conn.getInputStream());
        Log.d("body", s);
    }
    else {

        // handle error conditions like 404, 400, 500, ...

        // now it may be necessary to read the error stream

        InputStream errorStream = conn.getErrorStream();

        // ...
    }

据我所知，您应该始终关闭您打开的所有流。我不确定 conn.disconnect() 是否为您执行了该操作。

如果您想更方便地对 HTTP(S) 请求进行编码，可以查看 DavidWebb其中有一个库列表可帮助您避免使用繁琐的 HttpURLConnection。