我正在编写一个连接到受密码保护的cPanel服务器(Apache 2.2.22)页面的Android应用程序。当身份验证凭据正确时,我没有任何问题连接。但是,当凭据不正确时,我的Android应用程序似乎冻结在HttpURLConnection.getResponseCode()
方法中。服务器上的日志显示从我的Android设备发送了数百个请求,所有请求都按照预期返回了401,但出于某种原因,这并未反映在我的应用程序中。HttpURLConnection.getResponseCode()冻结执行/不超时
这里是我的代码,从内部的AsyncTask执行:
@Override
protected Integer doInBackground(String... bookInfoString) {
// Stop if cancelled
if(isCancelled()){
return null;
}
Log.i(getClass().getName(), "SendToDatabase.doInBackground()");
String apiUrlString = getResources().getString(R.string.url_vages_library);
try{
NetworkConnection connection = new NetworkConnection(apiUrlString);
connection.appendPostData(bookInfoString[0]);
int responseCode = connection.getResponseCode();
Log.d(getClass().getName(), "responseCode: " + responseCode);
return responseCode;
} catch(IOException e) {
return null;
}
}
这段代码利用我自己的类NetworkConnection
,这仅仅是围绕HttpURLConnection的一个基本的包装类,以避免重复的代码。那就是:
public class NetworkConnection {
private String url;
private HttpURLConnection connection;
public NetworkConnection(String urlString) throws IOException{
Log.i(getClass().getName(), "Building NetworkConnection for the URL \"" + urlString + "\"");
url = urlString;
// Build Connection.
try{
URL url = new URL(urlString);
connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setReadTimeout(1000 /* 1 seconds */);
connection.setConnectTimeout(1000 /* 1 seconds */);
} catch (MalformedURLException e) {
// Impossible: The only two URLs used in the app are taken from string resources.
e.printStackTrace();
} catch (ProtocolException e) {
// Impossible: "GET" is a perfectly valid request method.
e.printStackTrace();
}
}
public void appendPostData(String postData) {
try{
Log.d(getClass().getName(), "appendPostData() called.\n" + postData);
Log.d(getClass().getName(), "connection.getConnectTimeout(): " + connection.getConnectTimeout());
Log.d(getClass().getName(), "connection.getReadTimeout(): " + connection.getReadTimeout());
// Modify connection settings.
connection.setRequestMethod("POST");
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/json");
// Get OutputStream and attach POST data.
OutputStreamWriter writer = new OutputStreamWriter(connection.getOutputStream(), "UTF-8");
writer.write(postData);
if(writer != null){
writer.flush();
writer.close();
}
} catch (SocketTimeoutException e) {
Log.w(getClass().getName(), "Connection timed out.");
} catch (ProtocolException e) {
// Impossible: "POST" is a perfectly valid request method.
e.printStackTrace();
} catch (UnsupportedEncodingException e) {
// Impossible: "UTF-8" is a perfectly valid encoding.
e.printStackTrace();
} catch (IOException e) {
// Pretty sure this is impossible but not 100%.
e.printStackTrace();
}
}
public int getResponseCode() throws IOException{
Log.i(getClass().getName(), "getResponseCode()");
int responseCode = connection.getResponseCode();
Log.i(getClass().getName(), "responseCode: " + responseCode);
return responseCode;
}
public void disconnect(){
Log.i(getClass().getName(), "disconnect()");
connection.disconnect();
}
}
最后,这里是logcat的日志的一小部分:
05-03 11:01:16.315: D/vages.library.NetworkConnection(3408): connection.getConnectTimeout(): 1000
05-03 11:01:16.315: D/vages.library.NetworkConnection(3408): connection.getReadTimeout(): 1000
05-03 11:01:16.585: I/vages.library.NetworkConnection(3408): getResponseCode()
05-03 11:04:06.395: I/vages.library.MainActivity$SendToDatabase(3408): SendToDatabase.onPostExecute(null)
你可以看到的方法似乎的一个随机时间后刚刚返回null。我等待的最长时间是15分钟。最后两个信息日志之间还有几个来自dalikvm的内存日志(GC_CONCURRENT),我省略了它们。
我还应该说,目前我没有使用https,尽管我不相信会导致任何问题。我会非常感谢任何有关这方面的反馈,无论是完整答案还是只是一个评论,告诉我什么不是问题,因为我仍然不确定这个问题是服务器端还是客户端。
非常感谢你, 威廉
编辑:我忘了之前提到,我附上我的身份验证凭据用我自己定制java.net.Authenticator
:
public class CustomAuthenticator extends Authenticator {
Context mContext;
public CustomAuthenticator(Context context){
super();
mContext = context;
}
@Override
protected PasswordAuthentication getPasswordAuthentication() {
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);
String username = sharedPreferences.getString(SettingsActivity.KEY_USERNAME_PREFERENCE, null);
String password = sharedPreferences.getString(SettingsActivity.KEY_PASSWORD_PREFERENCE, null);
return new PasswordAuthentication(username, password.toCharArray());
}
}
我在活动的设置onCreate()
方法:
Authenticator.setDefault(new CustomAuthenticator(mContext));
另外,我已经使用curl来请求密码保护资源,并且收到了预期的401。我现在假设问题是客户端。
对不起,也许我瞎了,但我看不出现在你在哪里发送您的身份验证凭据。无论如何,也许你可以使用curl来尝试请求,看看你会得到什么样的输出:'curl -v“http://yoururl.com”-u user:password'。如果不起作用,问题可能出现在服务器端。 – Esparver 2013-05-03 11:36:22
谢谢@Esparver,我已经在curl中试过了,它按照预期返回了401。所以我想这是客户端问题。 我使用java.net.Authenticator发送我的身份验证凭据。我会附上这段代码给我的答案。 – 2013-05-03 11:54:40