com.suse.studio.api.lib.HttpClient.java Source code

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Here is the source code for com.suse.studio.api.lib.HttpClient.java

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/*
 * Copyright (c) 2010 Novell Inc.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.suse.studio.api.lib;

import java.io.IOException;
import java.io.InputStream;

import org.apache.http.HttpEntity;
import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.auth.AuthState;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.protocol.ClientContext;
import org.apache.http.impl.auth.BasicScheme;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.protocol.HttpContext;

/**
 * 
 * @author James Tan <james@jam.sg>
 */
public class HttpClient {

    private String userName = null;
    private String apiKey = null;

    // FIXME move this to a properties file
    private String apiHost = "susestudio.com";
    private String apiVersion = "1";

    private DefaultHttpClient httpClient = null;
    private long startTime = 0;

    /*
     * Constructors.
     */
    public HttpClient(String userName, String apiKey) {
        this.userName = userName;
        this.apiKey = apiKey;
        this.httpClient = getHttpClient(userName, apiKey);
    }

    public HttpClient(String userName, String apiKey, String apiHost) {
        this(userName, apiKey);
        this.apiHost = apiHost;
    }

    public HttpClient(String userName, String apiKey, String apiHost, String apiVersion) {
        this(userName, apiKey);
        this.apiHost = apiHost;
        this.apiVersion = apiVersion;
    }

    /*
     * HTTP GET.
     */
    public InputStream get(String path) {
        InputStream content = null;
        try {
            startTimer();
            HttpResponse response = httpClient.execute(new HttpGet(baseUrl() + path));
            stopTimer();
            HttpEntity entity = response.getEntity();
            if (entity != null) {
                content = entity.getContent();
            }
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return content;
    }

    public String toString() {
        return "userName:\t" + userName + "\n" + "apiKey:\t\t" + apiKey + "\n" + "baseUrl:\t" + baseUrl();
    }

    /*
     * Private methods.
     */

    private String baseUrl() {
        return "http://" + apiHost + "/api/v" + apiVersion + "/";
    }

    private DefaultHttpClient getHttpClient(final String userName, final String apiKey) {
        HttpRequestInterceptor preemptiveAuth = new HttpRequestInterceptor() {
            public void process(final HttpRequest request, final HttpContext context)
                    throws HttpException, IOException {
                AuthState authState = (AuthState) context.getAttribute(ClientContext.TARGET_AUTH_STATE);
                if (authState.getAuthScheme() == null) {
                    authState.setAuthScheme(new BasicScheme());
                    authState.setCredentials(new UsernamePasswordCredentials(userName, apiKey));
                }
            }
        };
        DefaultHttpClient client = new DefaultHttpClient();
        client.addRequestInterceptor(preemptiveAuth, 0);
        return client;
    }

    private void startTimer() {
        startTime = System.currentTimeMillis();
    }

    private void stopTimer() {
        long elapsed = System.currentTimeMillis() - startTime;
        System.out.printf("Took %d ms\n", elapsed);
    }
}