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服务器传递html值"检查你的浏览器"与JSON字符串

ByetHost server passing html values "Checking your browser" with JSON String

本文关键字：quot 浏览器 JSON 字符串 检查 服务器 html | 更新日期: 2023-09-27

当试图解析json字符串到android时，HTML值被传递。在一天之前，一切都工作得很好，突然我的应用程序开始崩溃，当我试图在php文件的帮助下获取数据库。

当我检查注意到html值…看到logcat 

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

这发生在我在byehost服务器上托管的所有页面上，而托管在其他服务器上的页面运行良好。我尝试将我的一个文件移动到其他服务器，并在此基础上返回正确的json字符串。

当我在浏览器中检查url时，它会返回正确的json字符串，没有任何异常或错误。但是在android中给出HTML值..

这是我的JSONfunction类 
package com.example.medionline;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;    
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;
import android.util.Log;
public class JSONfunctions
{
     static InputStream is = null;
 static String result = "";
 static JSONObject jArray = null;
public static JSONObject getJSONfromURL(String url) 
{
    // Download JSON data from URL
    try 
    {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(url);
        httppost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240 ");
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
    } 
    catch (Exception e) 
    {
        Log.e("log_tag", "Error in http connection " + e.toString());
    }
    try 
    {
        BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        while ((line = reader.readLine()) != null) 
        {
            Log.e("jsonnnnnnn", line);
            sb.append(line + "'n");
        }
        is.close();
        result = sb.toString();
        Log.e("result", result);
    } 
    catch (Exception e) 
    {
        Log.e("log_tag", "Error converting result " + e.toString());
    }
    try 
    {
        jArray = new JSONObject(result);
    } 
    catch (JSONException e)
    {
        Log.e("log_tag", "Error parsing data " + e.toString());
    }
    return jArray;
}
public static JSONObject makeHttpRequest(String loginUrl, String post, List<NameValuePair> para)
{
    try 
    {
        if(post == "POST")
        {
            HttpClient httpClient = new DefaultHttpClient();
            HttpPost httpPost = new HttpPost(loginUrl);
            httpPost.setEntity(new UrlEncodedFormEntity(para));
            httpPost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240 ");
            HttpResponse httpResponse = httpClient.execute(httpPost);
            HttpEntity httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();
        }
        else if(post == "GET")
        {
            HttpClient httpClient = new DefaultHttpClient();
            String paramString = URLEncodedUtils.format(para, "utf-8");
            loginUrl += "?" + paramString;
            HttpGet httpGet = new HttpGet(loginUrl);
            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, "utf-8"), 8);
        StringBuilder sb = new StringBuilder();
        String line = null;
        if (is != null) 
        {
            while ((line = reader.readLine()) != null) 
            {
                //Log.e("jsonnnnnnn", line);
                sb.append(line + "'n");
            }
            is.close();
            result = sb.toString();
            Log.e("result", result);
        }
    }
    catch (Exception e)
    {
        Log.e("Buffer Error", "Error converting result " + e.toString());
    }
    try
    {
        jArray = new JSONObject(result);
    }
    catch (JSONException e)
    {
        Log.e("JSON Parser", "Error parsing data " + e.toString());
    }
    return jArray;
}
}
这是我的PHP文件 
<?php
include('config.php');
date_default_timezone_set("Asia/Calcutta");
$result1 = mysqli_query($con,"SELECT  *
                                    FROM  `pj_medionline_mst_stockist` 
                                    ORDER BY  `pj_medionline_mst_stockist`.`ID` ASC ");

$response = array();
$posts = array();
while($row=mysqli_fetch_array($result1))
{
    $id =$row["ID"];
    $stkcode =$row["stkcode"];
    $comName =$row["ComName"];
    $operatorid =$row["operatorid"];
    $password =$row["Password"];

    $posts[] = array('id'=>$id, 'stkcode'=>$stkcode, 'stkname'=>$comName, 'operatorid'=>$operatorid, 'password'=>$password);
}
$response['stokist'] = $posts;
print(json_encode($response));
?>

解决!

我有同样的问题使用Byethost从我的PHP服务器检索JSON数据。我们只需要在HTTP请求中添加一个cookie来传递testcookie-nginx-module

正如Richard的回答所说:

主要问题是Byet Host实现了一个简单的安全反机器人模块>名为testcookie-nginx-module

https://kyprizel.github.io/testcookie-nginx-module/

在他提供的链接中，我们可以看到testcookie-nginx-module进行了两步验证:

  1. 第一次HTTP请求完成时，模块返回javascript而不是我们期望的JSON。该脚本在客户端(通常是web浏览器)上执行，并生成包含AES密钥的验证cookie。

下面是我从服务器收到的脚本:

<html>
<body>
    <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("f655ba9d09a112ffff8c63579db590b4"),
            b=toNumbers("98344c2eee86c3ffff90592585b49f80"),
            c=toNumbers("1286963467aa92ffff8323bdca0d7be9");
        document.cookie="__test="+toHex(slowAES.decrypt(c,2,a,b))+"; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/"; 
        location.href="http://myserver.byethost8.com/myPhpPage.php?i=1";
    </script>
    <noscript>This site requires Javascript to work, please enable Javascript in your browser or use a browser with Javascript support</noscript>
</body>

脚本将验证cookie添加到文档中，并将其重定向到我们实际想要访问的url。testcookie-nginx-module验证cookie的AES密钥，并让请求命中url，该url将响应我们想要访问的JSON数据。

在以下HTTP请求中，客户端将存储cookie，并将其添加到跳过步骤1的请求中。

Android应用的解决方案

我们将跳过cookie的生成，直接从web浏览器获取它，并将其添加到我们的Android HTTP请求中(当然，除非你想参与生成它)。

在您从web浏览器获得cookie之前，请确保您至少使用浏览器访问过一次url以生成它。

  • 从web浏览器获取cookie密钥。我使用了Google Chrome浏览器:

    1. 在浏览器右上角的Chrome菜单中选择Settings。
    2. 在页面底部，点击显示高级设置…
    3. 在隐私下，选择内容设置…。
    4. 选择所有cookie和站点数据….
    5. 搜索您的网站名称。通过搜索"byehost"你可以找到它。
      6. 打开名为__test的cookie，复制content、path和expires

  • 在我们的Android应用程序上设置cookie。在你的代码中应该是这样的:

    try 
{
 if(post == "POST")
 {
     HttpClient httpClient = new DefaultHttpClient();
     HttpPost httpPost = new HttpPost(loginUrl);
     httpPost.setEntity(new UrlEncodedFormEntity(para));
     httpPost.setHeader("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240 ");
     httpPost.addHeader("Cookie", "__test=THE_CONTENT_OF_YOUR_COOKIE_HERE; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/");
     HttpResponse httpResponse = httpClient.execute(httpPost);
     HttpEntity httpEntity = httpResponse.getEntity();
     is = httpEntity.getContent();
}
else if(post == "GET")
{
    HttpClient httpClient = new DefaultHttpClient();
    String paramString = URLEncodedUtils.format(para, "utf-8");
    loginUrl += "?" + paramString;
    HttpGet httpGet = new HttpGet(loginUrl);
    httpGet.addHeader("Cookie", "__test=THE_CONTENT_OF_YOUR_COOKIE_HERE; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/");
    HttpResponse httpResponse = httpClient.execute(httpGet);
    HttpEntity httpEntity = httpResponse.getEntity();
    is = httpEntity.getContent();
}
}

就是这样。现在，每次应用程序发出HTTP请求时，它都会包含cookie来传递testcookie-nginx-module，并将检索你的JSON数据。

我希望这对你有帮助，而且还不算太晚。

对

主要问题是Byet Host实现了一个简单的安全反机器人模块testcookie-nginx-module

https://kyprizel.github.io/testcookie-nginx-module/

这会让你的应用崩溃

这是免费主机上新引入的机器人检测功能，用于防止不需要的机器人。这只会在第一次访问页面时出现。

例如/upper_呼吸器y_infection.htm?在8月8日至8月11日期间，我的网络分析显示，ckattempt=1已经注册了37次。这对我的网络分析造成了严重破坏，因为我现在为每个页面收集两组数据(一组有和一组没有CKattempt=1，有些甚至带有附加的CKattempt=2)

可惜不能删除

查看详细信息

我应该添加以下作为答案，因为它是绕过上述问题的变通方法。张贴，因为它可能会帮助别人:

这个问题可以通过简单地写exit();在PHP文件的最后一个可执行语句中。这将退出php文件，并且不会追加文本。如:

<?php
include('config.php');
date_default_timezone_set("Asia/Calcutta");
$result1 = mysqli_query($con,"SELECT  *
                                FROM  `pj_medionline_mst_stockist` 
                                ORDER BY  `pj_medionline_mst_stockist`.`ID` ASC ");

$response = array();
$posts = array();
while($row=mysqli_fetch_array($result1))
{
    $id =$row["ID"];
    $stkcode =$row["stkcode"];
    $comName =$row["ComName"];
    $operatorid =$row["operatorid"];
    $password =$row["Password"];

    $posts[] = array('id'=>$id, 'stkcode'=>$stkcode, 'stkname'=>$comName, 'operatorid'=>$operatorid, 'password'=>$password);
}
$response['stokist'] = $posts;
print(json_encode($response));
exit();
?>
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