我有一个将数据发送到远程服务器上的数据库的应用程序。直到今天它仍然有效，但现在它突然停止了工作。我没有从远程服务器上的php文件中获取JsonObject，而是获得一个标题为＆＃34;检查浏览器的html页面＆＃34;。发生了什么，我现在该如何解决？ 这是我的解析器的代码：
public class JSONParser {
static InputStream is = null;
static JSONObject jObj = null;
static String json = "";
public JSONParser() {
}
public JSONObject makeHttpRequest(String url, String method,
List<NameValuePair> params) {
// Making HTTP request
try {
// check for request method
if(method == "POST"){
// request method is POST
// defaultHttpClient
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
httpPost.setHeader("User-Agent", "Mozilla/5.0 (Linux; U; Android 4.1.2; fr-fr; Nexus S Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
httpPost.setEntity(new UrlEncodedFormEntity(params));
HttpResponse httpResponse = httpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}else if(method == "GET"){
// request method is GET
DefaultHttpClient httpClient = new DefaultHttpClient();
String paramString = URLEncodedUtils.format(params, "utf-8");
url += "?" + paramString;
HttpGet httpGet = new HttpGet(url);
httpGet.setHeader("User-Agent", "Mozilla/5.0 (Linux; U; Android 4.1.2; fr-fr; Nexus S Build/JZO54K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30");
Log.d("URL", url);
HttpResponse httpResponse = httpClient.execute(httpGet);
HttpEntity httpEntity = httpResponse.getEntity();
is = httpEntity.getContent();
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
is, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
is.close();
json = sb.toString();
json = (json.substring(json.indexOf("{"), json.lastIndexOf("}") + 1));
} catch (Exception e) {
Log.e("Buffer Error", "Error converting result " + e.toString());
}
// try parse the string to a JSON object
try {
jObj = new JSONObject(json);
} catch (JSONException e) {
Log.e("JSON Parser", "Error parsing data " + e.toString());
}
// return JSON String
return jObj;
}
}
logcat在所有链接中显示类似的内容..
08-10 01:09:55.814: E/result(6744): <html><body><h2>Checking your browser..<h2><script type="text/javascript" src="/aes.js" ></script><script>function toNumbers(d){var e=[];d.replace(/(..)/g,function(d){e.push(parseInt(d,16))});return e}function toHex(){for(var d=[],d=1==arguments.length&&arguments[0].constructor==Array?arguments[0]:arguments,e="",f=0;f<d.length;f++)e+=(16>d[f]?"0":"")+d[f].toString(16);return e.toLowerCase()}var a=toNumbers("f655ba9d09a112d4968c63579db590b4"),b=toNumbers("98344c2eee86c3994890592585b49f80"),c=toNumbers("7965e114a1dccaf35af3756261f75ad8");document.cookie="__test="+toHex(slowAES.decrypt(c,2,a,b))+"; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/";location.href="http://realroom.byethost24.com/medical/stokist.php?ckattempt=1";</script></body></html>
08-10 01:09:55.814: E/JSON Parser(6744): Error parsing data org.json.JSONException: Value <html><body><h2>Checking of type java.lang.String cannot be converted to JSONObject
08-10 01:09:55.816: E/AndroidRuntime(6744): FATAL EXCEPTION: AsyncTask #1
08-10 01:09:55.816: E/AndroidRuntime(6744): Process: com.example.medionline, PID: 6744
08-10 01:09:55.816: E/AndroidRuntime(6744): java.lang.RuntimeException: An error occured while executing doInBackground()
08-10 01:09:55.816: E/AndroidRuntime(6744): at android.os.AsyncTask$3.done(AsyncTask.java:304)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:355)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.FutureTask.setException(FutureTask.java:222)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.FutureTask.run(FutureTask.java:242)
08-10 01:09:55.816: E/AndroidRuntime(6744): at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.lang.Thread.run(Thread.java:818)
08-10 01:09:55.816: E/AndroidRuntime(6744): Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String org.json.JSONObject.toString()' on a null object reference
08-10 01:09:55.816: E/AndroidRuntime(6744): at com.example.medionline.All_supplier_list$FetchMFG.doInBackground(All_supplier_list.java:182)
08-10 01:09:55.816: E/AndroidRuntime(6744): at com.example.medionline.All_supplier_list$FetchMFG.doInBackground(All_supplier_list.java:1)
08-10 01:09:55.816: E/AndroidRuntime(6744): at android.os.AsyncTask$2.call(AsyncTask.java:292)
08-10 01:09:55.816: E/AndroidRuntime(6744): at java.util.concurrent.FutureTask.run(FutureTask.java:237)
08-10 01:09:55.816: E/AndroidRuntime(6744): ... 4 more
byexost服务器可能会有一些配置更改，但我无法弄清楚..
答案 0 :(得分：0)
CloudFlare CDN背后的远程服务器？它有一个anti-DDOS feature，只允许通过支持cookie和JavaScript的用户代理。也许服务器操作员将反DDOS设置设置为“我受到攻击”，这是最严格的设置。或者CDN可能会看到一个不熟悉的User-agent字符串，即您的Android应用程序的字符串，它可能会使DDOS启发式发送。
如果要访问CDN正在保护的服务器免受分布式拒绝服务的攻击，您可能需要联系服务器运营商，以便在威胁控制中将您的IP地址列入白名单。或者，服务器运营商可以向服务器运营商发布的OAuth API凭证持有者提供非CDN保护的端点URL。
至于你的具体情况，我不熟悉Byet。它可能会使托管订阅者可以使用反DDOS设置，也可能不会。