Android/PHP - JSONParser 无法将网页内容作为 JsonObject 获取

Question

有很多关于 JSONParser 的问题，但似乎没有任何效果。 所以，我在服务器上有一个 php 脚本。

这个 php 脚本从数据库中获取一些数据，并用这些数据生成一个 Json。

我验证了这个Json，它是正确的。

在 android 中，我有一个 JSONParser，它连接到 php 脚本 url 并获取网页内容。

问题是页面内容不正确，不知道为什么。

我还使用了 OkHttp 和 URLConnection，它给了我相同的输出。

我也使用了 RETROfit，但这也不起作用，我有一个关于 stackoverflow 的问题。

这可能与 JavaScript 相关...

这是脚本链接：

PHP script link

这是php脚本生成的json：

    {
         "success": 0,
         "message": "RequiredFieldMissing"
    }

这是PHP脚本：

<?php 
// array for JSON response
$response = array();

// check for required fields
 if (isset($_POST['param1']) && isset($_POST['param2'])){

// include db connect class
require_once __DIR__ . '/connect_to_db.php';

// connecting to db
$db = new DB_CONNECT();

 $param1 = $_POST['param1'];
 $param2 = $_POST['param2'];

 // get data
$result = mysql_query("SELECT param1 FROM tableName WHERE param2 = '$param2'") or die(mysql_error());

    if (mysql_num_rows($result)>0) {

        $row = mysql_fetch_array($result);
        if ($row["param1"] == $param1){
            // success
                $response["success"] = 1;
                $response["message"] = "Correct";
        } else {
                // no success
            $response["success"] = 0;
            $response["message"] = "Incorrect";
        }

    } else {
    // no data found
    $response["success"] = 0;
    $response["message"] = "NoData";

    }
    // echo JSON
        echo json_encode($response);
 } else {
    // required field is missing
    $response["success"] = 0;
    $response["message"] = "RequiredFieldMissing";

    // echoing JSON
    echo json_encode($response);
}
?>

这是 JSONParser：

    public class JSONParser {

    static InputStream is = null;

    static JSONObject jObj = null;

    static String json = "";

    // constructor
    public JSONParser() {

    }

    // function get json from url
    // by making HTTP POST or GET mehtod
    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
                DefaultHttpClient httpClient = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(url);
                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);

                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();
        } 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;

    }
}

这是build.gradle：

apply plugin: 'com.android.application'
apply plugin: 'realm-android'

android {
    packagingOptions {
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
    }
    compileSdkVersion 23
    buildToolsVersion "23.0.0"
    useLibrary 'org.apache.http.legacy'

    defaultConfig {
        applicationId "com.myApp"
        minSdkVersion 19
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
}

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.0.0'
    compile 'com.android.support:design:23.0.0'
    compile 'com.android.support:support-v4:23.0.0'
    compile 'com.google.android.gms:play-services-maps:8.4.0'
    compile 'com.google.android.gms:play-services-appindexing:8.4.0'
    compile 'org.apache.commons:commons-lang3:3.4'
    compile 'com.squareup.okhttp3:okhttp:3.2.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.google.code.gson:gson:2.4'
    compile 'org.glassfish:javax.annotation:10.0-b28'
}

这是 AsyncTask 类：

public class SomeTask extends AsyncTask<Void, Void, Boolean> {

    private final String param1;

    private final String param2;

    private String message;

    UserLoginTask(String param1, String param2) {
        this.param1 = param1;
        this.param2 = param2;
        message = StringUtils.EMPTY;
    }

    @Override
    protected Boolean doInBackground(Void... param) {

        // Building Parameters
        List<NameValuePair> params = new ArrayList<NameValuePair>();
        params.add(new BasicNameValuePair("param1", "param1Value"));
        params.add(new BasicNameValuePair("param2", "param2Value"));

        // Creating JSON Parser object
        JSONParser jsonParser = new JSONParser();

        // getting JSON Object
        // Note that create product url accepts POST method
        JSONObject json = jsonParser.makeHttpRequest(my_url, "GET", params);

        if (json == null) {
            return Boolean.FALSE;
        } else {
            Log.d("JSON: ", json.toString());
        }

        try {
            if (json.getInt(TAG_SUCCESS) == 1) {
                return Boolean.TRUE;
            } else {
                message = json.getString(TAG_MESSAGE);
                return Boolean.FALSE;
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }

        return Boolean.FALSE;
    }

    @Override
    protected void onPostExecute(final Boolean success) {
        mAuthTask = null;
        showProgress(false);

        if (success) {
            finish();
            startActivity(new Intent(ThisActivity.this, NextActivity.class));
        } else {
            if ("Incorrect".equals(message)) {
                mPasswordView.setError(getString(R.string.error_incorrect_credentials));
                mPasswordView.requestFocus();
            } else if ("NoData".equals(message)) {
                mPasswordView.setError(getString(R.string.error_no_account_found));
                mPasswordView.requestFocus();
            } else {
                mPasswordView.setError(getString(R.string.unknown_error));
                mPasswordView.requestFocus();
            }
        }
    }
}

这是我得到的输出：

<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("f655ba9d09a112d4968c63579db590b4"),b=toNumbers("98344c2eee86c3994890592585b49f80"),c=toNumbers("6edf9232af73be55d6cc499e851409b9");document.cookie="__test="+toHex(slowAES.decrypt(c,2,a,b))+"; expires=Thu, 31-Dec-37 23:55:55 GMT; path=/"; document.cookie="referrer="+escape(document.referrer); location.href="http://mobilehealth.byethost11.com/aScript.php?param1=param1Value&param2=param2Value&ckattempt=1";</script><noscript>This site requires Javascript to work, please enable Javascript in your browser or use a browser with Javascript support</noscript></body></html>

LOGCAT：

E/JSON Parser: Error parsing data org.json.JSONException: Value <html><body><script of type java.lang.String cannot be converted to JSONObject

这里抛出： jObj = new JSONObject(json);

Answer 1

我不知道是什么问题，但我在 xampp 和不同的主机上尝试过，现在它可以工作了。 我认为的问题是主机以某种方式使用 javascript 响应。 上面的代码都是正确的。

Answer 2

最好使用 UTF-8 而不是 iso-8859-1。我认为这个问题可能出在您正在使用的字符集中。

并确保在编写字符串时添加了一些不需要的字符（没有意外插入特殊字符）。