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/*
* Copyright (c) 2017 - 2019, SmartDeviceLink Consortium, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following
* disclaimer in the documentation and/or other materials provided with the
* distribution.
*
* Neither the name of the SmartDeviceLink Consortium, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
package com.smartdevicelink.util;
import android.os.AsyncTask;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.URL;
public class HttpRequestTask extends AsyncTask<String, String, String> {
private static final String TAG = "Http Request Task";
public static final String REQUEST_TYPE_POST = "POST";
public static final String REQUEST_TYPE_GET = "GET";
public static final String REQUEST_TYPE_DELETE = "DELETE";
HttpRequestTaskCallback cb;
/**
* @param hcb callback for when this task finishes
* <br><br><b> - When calling execute, params as followed: </b><br>
* 1. Url String<br>
* 2. Request type (Defined in this class) REQUEST_TYPE_POST, REQUEST_TYPE_GET, REQUEST_TYPE_DELETE<br>
* 3. (Optional) Data to be sent. <br>
* 4. (Optional) Content Type Default will be application/json<br>
* 5. (Optional) Accept Type default will be application/json
*
*/
public HttpRequestTask( HttpRequestTaskCallback hcb){
this.cb = hcb;
}
@Override
protected String doInBackground(String... params) {
int length = params.length;
String urlString = params[0];
String request_type = params[1];
//Grab and set data to be written if included
String data;
if(length>2){
data = params[2];
}else{
data = null;
}
//Grab and set content type for the header if included
String contentType;
if(length>3){
contentType = params[3];
}else{
contentType = "application/json";
}
//Grab and set accept type for the header if included
String acceptType;
if(length>4){
acceptType = params[4];
}else{
acceptType = "application/json";
}
if(urlString == null || request_type == null){
DebugTool.logError(TAG, "Can't process request, param error");
if(cb!=null){
cb.httpFailure(-1);
cb = null;
}
return "Error";
}
HttpURLConnection urlConnection = null;
BufferedReader reader = null;
try {
URL url = new URL(urlString);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod(request_type);
urlConnection.setRequestProperty("Content-Type", contentType);
urlConnection.setRequestProperty("Accept", acceptType);
//If we have data, we should write it out
if(data !=null){
Writer writer = new BufferedWriter(new OutputStreamWriter(urlConnection.getOutputStream(), "UTF-8"));
writer.write(data);
writer.close();
}
InputStream inputStream = urlConnection.getInputStream();
int responseCode = urlConnection.getResponseCode();
if (responseCode == 200) { //Success
//input stream
StringBuffer buffer = new StringBuffer();
if (inputStream == null) {
// Nothing to do.
if(cb!=null){
cb.httpCallComplete(null);
cb = null;
}
return null;
}
reader = new BufferedReader(new InputStreamReader(inputStream));
String inputLine;
while ((inputLine = reader.readLine()) != null)
buffer.append(inputLine).append("\n");
if (buffer.length() == 0) {
// Stream was empty. No point in parsing.
if(cb!=null){
cb.httpCallComplete(null);
cb = null;
}
return null;
}
String response;
response = buffer.toString();
//send to post execute
if(cb!=null){
cb.httpCallComplete(response);
cb = null;
}
return response;
}else{
if(cb!=null){
cb.httpFailure(responseCode);
cb = null;
}
DebugTool.logError(TAG, "Failed to download file - " + responseCode);
return null;
}
} catch (IOException e) {
e.printStackTrace();
} catch (NullPointerException e){ // Only to catch error in urlConnection.getOutputStream() - when servers are down
e.printStackTrace();
urlConnection = null;
}
finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (reader != null) {
try {
reader.close();
} catch (final IOException e) {
DebugTool.logError(TAG, "Error closing stream", e);
}
}
if(cb!=null){
cb.httpFailure(-1);
}
}
return null;
}
/**
* Callback interface for HTTP requests.
* @author Joey Grover
*
*/
public interface HttpRequestTaskCallback{
/**
* Called when HTTP request is successfully completed.
* @param response The response to the HTTP request.
*/
void httpCallComplete(String response);
/**
* Called when HTTP request failed.
* @param statusCode The HTTP failure code.
*/
void httpFailure(int statusCode);
}
}
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