ru.elifantiev.yandex.YandexAPIService.java Source code

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Here is the source code for ru.elifantiev.yandex.YandexAPIService.java

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/*
 * Copyright 2011 Oleg Elifantiev
 *
 *    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 ru.elifantiev.yandex;

import android.net.Uri;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.message.BasicHeader;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import ru.elifantiev.yandex.oauth.AccessToken;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

abstract public class YandexAPIService {

    private final AccessToken token;

    public YandexAPIService(AccessToken token) {

        this.token = token;
    }

    abstract protected Uri getServiceUri();

    protected JSONObject callMethod(String methodName) {
        return callMethod(methodName, new HashMap<String, String>());
    }

    protected JSONObject callMethod(String methodName, Map<String, String> params) {

        Uri.Builder builder = getServiceUri().buildUpon();
        builder.scheme("https").appendPath("api").appendPath(methodName);

        HttpClient client = SSLHttpClientFactory.getNewHttpClient();
        HttpPost method = new HttpPost(builder.build().toString());

        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(params.size());
        for (String param : params.keySet()) {
            nameValuePairs.add(new BasicNameValuePair(param, params.get(param)));
        }
        try {
            method.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        } catch (UnsupportedEncodingException e) {
            throw new MethodCallException("Call to " + methodName + " failed", e);
        }

        method.setHeader(new BasicHeader("Authorization", "Bearer " + token.toString()));

        try {
            HttpResponse response = client.execute(method);
            int statusCode = response.getStatusLine().getStatusCode();
            if (statusCode == 200) {
                return (JSONObject) new JSONTokener(EntityUtils.toString(response.getEntity())).nextValue();
            }

            throw new MethodCallException("Method returned unexpected status code " + String.valueOf(statusCode));
        } catch (IOException e) {
            throw new MethodCallException("Call to " + methodName + " failed", e);
        } catch (JSONException e) {
            throw new FormatException("Call to " + methodName + " failed due to wrong response format", e);
        }
    }

}