net.seedboxer.seedroid.utils.RestClient.java Source code

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Here is the source code for net.seedboxer.seedroid.utils.RestClient.java

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/*******************************************************************************
 * RestClient.java
 * 
 * Copyright (c) 2012 SeedBoxer Team.
 * 
 * This file is part of Seedroid.
 * 
 * Seedroid is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * Seedroid is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with Seedroid.  If not, see <http ://www.gnu.org/licenses/>.
 ******************************************************************************/
package net.seedboxer.seedroid.utils;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.CredentialsProvider;
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.methods.HttpUriRequest;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;

public class RestClient {

    private final ArrayList<NameValuePair> params;
    private final ArrayList<NameValuePair> headers;
    private CredentialsProvider credProvider = null;

    private final String url;

    private int responseCode;
    private String message;

    private String response;

    public String getResponse() {
        return response;
    }

    public String getErrorMessage() {
        return message;
    }

    public int getResponseCode() {
        return responseCode;
    }

    public RestClient(String url) {
        this.url = url;
        params = new ArrayList<NameValuePair>();
        headers = new ArrayList<NameValuePair>();
    }

    public void AddParam(String name, String value) {
        params.add(new BasicNameValuePair(name, value));
    }

    public void AddHeader(String name, String value) {
        headers.add(new BasicNameValuePair(name, value));
    }

    public void AddBasicAuthentication(String username, String password) {
        credProvider = new BasicCredentialsProvider();
        credProvider.setCredentials(new AuthScope(AuthScope.ANY_HOST, AuthScope.ANY_PORT),
                new UsernamePasswordCredentials(username, password));
    }

    public void Execute(RequestMethod method) throws Exception {
        switch (method) {
        case GET: {
            //add parameters
            String combinedParams = "";
            if (!params.isEmpty()) {
                combinedParams += "?";
                for (NameValuePair p : params) {
                    String paramString = getParamString(p.getName(), p.getValue());
                    if (combinedParams.length() > 1) {
                        combinedParams += "&" + paramString;
                    } else {
                        combinedParams += paramString;
                    }
                }
            }

            HttpGet request = new HttpGet(url + combinedParams);

            //add headers
            for (NameValuePair h : headers) {
                request.addHeader(h.getName(), h.getValue());
            }

            executeRequest(request, url);
            break;
        }
        case POST: {
            HttpPost request = new HttpPost(url);

            //add headers
            for (NameValuePair h : headers) {
                request.addHeader(h.getName(), h.getValue());
            }

            if (!params.isEmpty()) {
                if (params.size() == 1) {
                    request.setEntity(new StringEntity(params.get(0).getValue(), HTTP.UTF_8));
                } else {
                    request.setEntity(new UrlEncodedFormEntity(params, HTTP.UTF_8));
                }
            }

            executeRequest(request, url);
            break;
        }
        }
    }

    public static String getParamString(String paramName, String paramValue) throws UnsupportedEncodingException {
        return paramName + "=" + URLEncoder.encode(paramValue, "UTF-8");
    }

    private void executeRequest(HttpUriRequest request, String url) {
        DefaultHttpClient client = new DefaultHttpClient();
        if (credProvider != null) {
            client.setCredentialsProvider(credProvider);
        }

        HttpResponse httpResponse;

        try {
            httpResponse = client.execute(request);
            responseCode = httpResponse.getStatusLine().getStatusCode();
            message = httpResponse.getStatusLine().getReasonPhrase();

            HttpEntity entity = httpResponse.getEntity();

            if (entity != null) {

                InputStream instream = entity.getContent();
                response = convertStreamToString(instream);

                // Closing the input stream will trigger connection release
                instream.close();
            }

        } catch (ClientProtocolException e) {
            client.getConnectionManager().shutdown();
            e.printStackTrace();
        } catch (IOException e) {
            client.getConnectionManager().shutdown();
            e.printStackTrace();
        }
    }

    private static String convertStreamToString(InputStream is) {

        BufferedReader reader = new BufferedReader(new InputStreamReader(is));
        StringBuilder sb = new StringBuilder();

        String line = null;
        try {
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sb.toString();
    }
}