cn.com.lowe.android.tools.net.response.JsonHttpResponseHandler.java Source code

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Here is the source code for cn.com.lowe.android.tools.net.response.JsonHttpResponseHandler.java

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/*
Android Asynchronous Http Client
Copyright (c) 2011 James Smith <james@loopj.com>
http://loopj.com
    
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
    
    http://www.apache.org/licenses/LICENSE-2.0
    
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
 */

package cn.com.lowe.android.tools.net.response;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.StatusLine;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.apache.http.Header;
import org.apache.http.client.HttpResponseException;
import org.apache.http.entity.BufferedHttpEntity;
import org.apache.http.util.EntityUtils;

/**
 * Used to intercept and handle the responses from requests made using
 * {@link AsyncHttpClient}, with automatic parsing into a {@link JSONObject} or
 * {@link JSONArray}.
 * <p>
 * This class is designed to be passed to get, post, put and delete requests
 * with the {@link #onSuccess(JSONObject)} or {@link #onSuccess(JSONArray)}
 * methods anonymously overridden.
 * <p>
 * Additionally, you can override the other event methods from the parent class.
 */
public abstract class JsonHttpResponseHandler extends HttpResponseHandler {

    protected abstract void onSuccess(int statusCode, Header[] headers, JSONObject response);

    protected abstract void onSuccess(int statusCode, Header[] headers, JSONArray response);

    @Override
    protected void onSuccess(int statusCode, Header[] headers, Object content) {
        if (statusCode != HttpStatus.SC_NO_CONTENT) {
            Object jsonResponse = null;
            try {
                jsonResponse = parseResponse((String) content);
                if (jsonResponse instanceof JSONObject) {
                    onSuccess(statusCode, headers, (JSONObject) jsonResponse);
                } else if (jsonResponse instanceof JSONArray) {
                    onSuccess(statusCode, headers, (JSONArray) jsonResponse);
                }
            } catch (JSONException e) {
                onFailure(e, content);
            }
        }
    }

    @Override
    public void sendResponseMessage(HttpResponse response) {
        StatusLine status = response.getStatusLine();
        String responseBody = null;
        try {
            HttpEntity entity = null;
            HttpEntity temp = response.getEntity();
            if (temp != null) {
                entity = new BufferedHttpEntity(temp);
                responseBody = EntityUtils.toString(entity, ENCODING);
            }
        } catch (IOException e) {
            sendFailureMessage(e, (String) null);
        }

        if (status.getStatusCode() >= 300) {
            sendFailureMessage(new HttpResponseException(status.getStatusCode(), status.getReasonPhrase()),
                    responseBody);
        } else {
            sendSuccessMessage(status.getStatusCode(), response.getAllHeaders(), responseBody);
        }

    }

    private Object parseResponse(String content) throws JSONException {
        if (content.startsWith("[") && content.endsWith("]")) {
            return new JSONArray(content);
        } else if (content.startsWith("{") && content.endsWith("}")) {
            return new JSONObject(content);
        } else {
            throw new JSONException("response is not json");
        }
    }
}