/
ExampleCallbackServlet.java
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/
ExampleCallbackServlet.java
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package com.hellosign.sdk.callback;
/**
* The MIT License (MIT)
*
* Copyright (C) 2015 hellosign.com
*
* 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.
*/
import java.io.IOException;
import java.text.DateFormat;
import java.util.Enumeration;
import java.util.List;
import java.util.TimeZone;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.hellosign.sdk.HelloSignException;
import com.hellosign.sdk.resource.Event;
/**
* This example servlet demonstrates how to use the HelloSign Java SDK resource
* classes to handle events POSTed from the HelloSign API.
*
* @author "Chris Paul (chris@hellosign.com)"
*/
public class ExampleCallbackServlet extends HttpServlet {
private static final Logger logger = LoggerFactory.getLogger(ExampleCallbackServlet.class);
private static final long serialVersionUID = -5673774222721758983L;
private static final String API_KEY_INIT_PARAM = "hellosign.api.key";
private String apiKey;
public ExampleCallbackServlet() {
apiKey = System.getProperty(API_KEY_INIT_PARAM);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
Enumeration<String> names = request.getParameterNames();
while (names.hasMoreElements()) {
String name = names.nextElement();
System.out.println(name + " = " + request.getParameter(name));
}
// First, process the response body and retrieve the JSON object
// (it lives in the POST field called "json")
String jsonStr = null;
try {
List<FileItem> items = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
for (FileItem item : items) {
if ("json".equals(item.getFieldName())) {
jsonStr = item.getString();
}
}
} catch (FileUploadException ex) {
ex.printStackTrace();
}
if (jsonStr == null) {
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
// Convert the JSON string to a JSONObject
JSONObject json = null;
try {
json = new JSONObject(jsonStr);
} catch (JSONException ex) {
ex.printStackTrace();
}
if (json == null) {
response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
return;
}
// Create a new Event so we can work with the response
try {
Event event = new Event(json);
logger.debug(event.toString());
if (event.isValid(apiKey)) {
logger.debug("Event received:");
if (event.hasAccountId()) {
logger.debug("\tAccount ID: " + event.getAccountId());
}
DateFormat dateformat = DateFormat.getDateTimeInstance();
dateformat.setTimeZone(TimeZone.getTimeZone("US/Pacific"));
logger.debug("\tDate: " + dateformat.format(event.getEventDate()));
logger.debug("\tType: " + event.getType());
if (event.hasSignatureRequest()) {
logger.debug("\tSignature Request: " + event.getSignatureRequest().getId());
}
if (event.hasRelatedSignatureId()) {
logger.debug("\tSignature ID: " + event.getRelatedSignatureId());
}
}
} catch (HelloSignException ex) {
ex.printStackTrace();
}
// Respond to HelloSign with an HTTP 200 and valid message
response.setContentType("text/plain");
response.setStatus(HttpServletResponse.SC_OK);
response.getWriter().println("Hello API Event Received");
}
}