com.company.project.core.connector.HttpClientHelper.java Source code

Introduction

Here is the source code for com.company.project.core.connector.HttpClientHelper.java

Source

/*******************************************************************************
 * Copyright  Microsoft Open Technologies, Inc.
 * 
 * All Rights Reserved
 * 
 * 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
 * 
 * THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS
 * OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
 * ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A
 * PARTICULAR PURPOSE, MERCHANTABILITY OR NON-INFRINGEMENT.
 * 
 * See the Apache License, Version 2.0 for the specific language
 * governing permissions and limitations under the License.
 ******************************************************************************/
package com.company.project.core.connector;

import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;

import org.json.JSONException;
import org.json.JSONObject;

/**
 * This is Helper class for all RestClient class.
 * 
 * @author Azure Active Directory Contributor
 * 
 */
public class HttpClientHelper {

    public HttpClientHelper() {
        super();
    }

    public static String getResponseStringFromConn(HttpURLConnection conn, boolean isSuccess) throws IOException {

        BufferedReader reader = null;
        if (isSuccess) {
            reader = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        } else {
            reader = new BufferedReader(new InputStreamReader(conn.getErrorStream()));
        }
        StringBuffer stringBuffer = new StringBuffer();
        String line = "";
        while ((line = reader.readLine()) != null) {
            stringBuffer.append(line);
        }

        return stringBuffer.toString();
    }

    public static String getResponseStringFromConn(HttpURLConnection conn, String payLoad) throws IOException {

        // Send the http message payload to the server.
        if (payLoad != null) {
            conn.setDoOutput(true);
            OutputStreamWriter osw = new OutputStreamWriter(conn.getOutputStream());
            osw.write(payLoad);
            osw.flush();
            osw.close();
        }

        // Get the message response from the server.
        BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()));
        String line = "";
        StringBuffer stringBuffer = new StringBuffer();
        while ((line = br.readLine()) != null) {
            stringBuffer.append(line);
        }

        br.close();

        return stringBuffer.toString();
    }

    public static byte[] getByteaArrayFromConn(HttpURLConnection conn, boolean isSuccess) throws IOException {

        InputStream is = conn.getInputStream();
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buff = new byte[1024];
        int bytesRead = 0;

        while ((bytesRead = is.read(buff, 0, buff.length)) != -1) {
            baos.write(buff, 0, bytesRead);
        }

        byte[] bytes = baos.toByteArray();
        baos.close();
        return bytes;
    }

    /**
     * for bad response, whose responseCode is not 200 level
     * 
     * @param responseCode
     * @param errorCode
     * @param errorMsg
     * @return
     * @throws JSONException
     */
    public static JSONObject processResponse(int responseCode, String errorCode, String errorMsg)
            throws JSONException {
        JSONObject response = new JSONObject();
        response.put("responseCode", responseCode);
        response.put("errorCode", errorCode);
        response.put("errorMsg", errorMsg);

        return response;
    }

    /**
     * for bad response, whose responseCode is not 200 level
     * 
     * @param responseCode
     * @param errorCode
     * @param errorMsg
     * @return
     * @throws JSONException
     */
    public static JSONObject processGoodRespStr(int responseCode, String goodRespStr) throws JSONException {
        JSONObject response = new JSONObject();
        response.put("responseCode", responseCode);
        if (goodRespStr.equalsIgnoreCase("")) {
            response.put("responseMsg", "");
        } else {
            response.put("responseMsg", new JSONObject(goodRespStr));
        }

        return response;
    }

    /**
     * for good response
     * 
     * @param responseCode
     * @param responseMsg
     * @return
     * @throws JSONException
     */
    public static JSONObject processBadRespStr(int responseCode, String responseMsg) throws JSONException {

        JSONObject response = new JSONObject();
        response.put("responseCode", responseCode);
        if (responseMsg.equalsIgnoreCase("")) { // good response is empty string
            response.put("responseMsg", "");
        } else { // bad response is json string
            JSONObject errorObject = new JSONObject(responseMsg).optJSONObject("odata.error");

            String errorCode = errorObject.optString("code");
            String errorMsg = errorObject.optJSONObject("message").optString("value");
            response.put("responseCode", responseCode);
            response.put("errorCode", errorCode);
            response.put("errorMsg", errorMsg);
        }

        return response;
    }

}