<!-- Replace the url with your own sharable link and add an api key -->
<a href="https://api.doxey.io/merge?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1q5ghXsjPS8OqjmRH0lDvlUauZ2F5yO_lk1pPAC72zVc%2Fedit&name=World!" target="_blank">Create and Download</a>

var response = UrlFetchApp.fetch('https://api.doxey.io/merge?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1q5ghXsjPS8OqjmRH0lDvlUauZ2F5yO_lk1pPAC72zVc%2Fedit&name=World!');
var blob = response.getBlob();
var code = response.getResponseCode();
Logger.log(code === 200 ? "Success" : "Error Code: " + code);
// sending out email just for demo purposes
GmailApp.sendEmail("[your email goes here to send this to yourself]", "Your generated document", "See attachment",
  { attachments: [{
      fileName: blob.getName(),
      mimeType: "application/pdf",
      content: blob.getBytes()
    }]
  });

// Replace the url with your own sharable link and add an api key
URL url = new URL("https://api.doxey.io/merge?url=https%3A%2F%2Fdocs.google.com%2Fdocument%2Fd%2F1q5ghXsjPS8OqjmRH0lDvlUauZ2F5yO_lk1pPAC72zVc%2Fedit&name=World!");
InputStream inputStream = url.openStream();
FileOutputStream outputStream = new FileOutputStream(new File("processed.pdf"));
transfer(inputStream, outputStream);

<form action="http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU" target="_blank">
    <input type="text" name="position" required placeholder="Position">
    <input type="text" name="dateOfInterview" required placeholder="Date of Interview, format YYYY-MM-DD">
    <input type="text" name="refused" required placeholder="Refused: true / false">
    <input type="submit" value="Create and Download">
</form>

function postParameters() {
  var payload = {
    position: "Sales Representative",
    dateOfInterview: "2014-01-31",
    refused: true
  };

   var options = {
     contentType: "application/json",
     method : "post",
     payload : Utilities.jsonStringify(payload)
  };

  var response =
    UrlFetchApp.fetch('http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU',
                      options)
  var blob = response.getBlob();
  var code = response.getResponseCode();
  Logger.log(code === 200 ? "Success" : "Error Code: " + code);

  // sending out email just for demo purposes
  // in real applications send out personalized emails using Ultradox instead
  GmailApp.sendEmail("[your email goes here to send this to yourself]", "Your generated document",
    "See attachment",
     { attachments: [
                        { fileName: blob.getName(),
                          mimeType: "application/pdf",
                          content: blob.getBytes()
                        }
                    ]
     }
  );
}

// this example requires GSON: http://code.google.com/p/google-gson/
URL url = new URL("http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoInput(true);
connection.setDoOutput(true);

Gson gson = new Gson();
// have a look at GitHub gist below to see full code for Payload class
Payload payload = new Payload("Sales Representative", "2014-01-31", true);
String json = gson.toJson(payload);
byte[] bytes = json.getBytes();
connection.setRequestProperty("Content-Length", Integer.toString(bytes.length));
OutputStream os = connection.getOutputStream();
os.write(bytes);
os.close();
InputStream inputStream = connection.getInputStream();
FileOutputStream outputStream = new FileOutputStream(new File("processed.pdf"));
transfer(inputStream, outputStream);

// this example requires GSON: http://code.google.com/p/google-gson/
URL url = new URL("http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU");
URLFetchService urlFetchService = URLFetchServiceFactory.getURLFetchService();
HTTPRequest request = new HTTPRequest(url, HTTPMethod.POST, withDefaults().setDeadline(30.0));
request.setHeader(new HTTPHeader("Content-Type", "application/json"));

Gson gson = new Gson();
// have a look at GitHub gist below to see full code for Payload class
Payload payload = new Payload("Sales Representative", "2014-01-31", true);
String json = gson.toJson(payload);
request.setPayload(json.getBytes());
request.setHeader(new HTTPHeader("Content-Type", "application/json"));

HTTPResponse response = urlFetchService.fetch(request);
byte[] content = response.getContent();

<!-- Manual URL enconding at http://www.albionresearch.com/misc/urlencode.php -->
<a href="http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU?name=Olli&
events.title=Strategy%20Meeting&
events.startTime=2014-02-01T10%3A00%3A00%2B01&
events.endTime=2014-02-01T11%3A30%3A00%2B01&
events.description=Discussion%20of%20the%20floreysoft%20strategy&
events.location=Telemannstra%C3%9Fe%2022%2C%2020255%20Hamburg&
events.title=Dinner&
events.startTime=2014-02-01T20%3A00%3A00%2B01&
events.endTime=2014-02-01T22%3A30%3A00%2B01&
events.description=Dinner%20with%20Le%20Chef&
events.location=Gau%C3%9Fstra%C3%9Fe%203%2C%2022765%20Hamburg
" target="_blank">Create and Download</a>

function postComplex() {
  // to show that stringifying real dates does work as well
  var date = new Date();
  var events = {
    name: "Olli",
    events: [
      {
        title: "Strategy Meeting",
        startTime: "Fri Feb 01 10:00:00 CET 2014",
        endTime: "Fri Feb 01 11:30:00 CET 2014",
        description: "Discussion of the floreysoft strategy",
        location: "Telemannstraße 22, 20255 Hamburg"
      }, {
        title: "Dinner",
        startTime: "Fri Feb 01 20:00:00 CET 2014",
        endTime: date,
        description: "Dinner with Le Chef",
        location: "Gaußstraße 3, 22765 Hamburg"
      }
    ]
  };

   var options = {
     contentType: "application/json",
     method : "post",
     payload : Utilities.jsonStringify(events)
  };

  var response =
    UrlFetchApp.fetch('http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU?locale=DE',
                      options)
  var blob = response.getBlob();
  var code = response.getResponseCode();
  Logger.log(code === 200 ? "Success" : "Error Code: " + code);

  // sending out email just for demo purposes
  // in real applications send out personalized emails using Ultradox instead
  GmailApp.sendEmail("[your email goes here to send this to yourself]", "Your generated document",
    "See attachment",
     { attachments: [
                        { fileName: blob.getName(),
                          mimeType: "application/pdf",
                          content: blob.getBytes()
                        }
                    ]
     }
  );
}

// this example requires GSON: http://code.google.com/p/google-gson/
URL url = new URL(
  "http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU?locale=DE");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type", "application/json");
connection.setDoInput(true);
connection.setDoOutput(true);

Events events = new Events("Olli");
events.addEvent(new Event("Strategy Meeting", new Date(113, 01, 01,
        10, 00), new Date(113, 01, 01, 11, 30),
        "Discussion of the floreysoft strategy",
        "Telemannstraße 22, 20255 Hamburg"));
events.addEvent(new Event("Dinner", new Date(113, 01, 01,
        20, 00), new Date(113, 01, 01, 22, 30),
        "Dinner with Le Chef",
        "Gaußstraße 3, 22765 Hamburg"));

// use ISO8601 date format for best compatibility
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ssX").create();
String json = gson.toJson(events);
byte[] bytes = json.getBytes("UTF-8"); // encoding is important when you are outside of ASCII
connection.setRequestProperty("Content-Length", Integer.toString(bytes.length));
OutputStream os = connection.getOutputStream();
os.write(bytes);
os.close();

InputStream inputStream = connection.getInputStream();
FileOutputStream outputStream = new FileOutputStream(new File("processed.pdf"));
transfer(inputStream, outputStream);

// this example requires GSON: http://code.google.com/p/google-gson/
URL url = new URL(
  "http://www.ultradox.com/download/WNGkRelSf4oykbBWCsrNZ0yVVcAWPU?locale=DE");
URLFetchService urlFetchService = URLFetchServiceFactory.getURLFetchService();
HTTPRequest request = new HTTPRequest(url, HTTPMethod.POST, withDefaults().setDeadline(30.0));
request.setHeader(new HTTPHeader("Content-Type", "application/json"));

Events events = new Events("Olli");
events.addEvent(new Event("Strategy Meeting", new Date(113, 01, 01,
        10, 00), new Date(113, 01, 01, 11, 30),
        "Discussion of the floreysoft strategy",
        "Telemannstraße 22, 20255 Hamburg"));
events.addEvent(new Event("Dinner", new Date(113, 01, 01,
        20, 00), new Date(113, 01, 01, 22, 30),
        "Dinner with Le Chef",
        "Gaußstraße 3, 22765 Hamburg"));

// use ISO8601 date format for best compatibility
Gson gson = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ssX").create();
String json = gson.toJson(events);
request.setPayload(json.getBytes("UTF-8"));
request.setHeader(new HTTPHeader("Content-Type", "application/json"));

HTTPResponse response = urlFetchService.fetch(request);
byte[] content = response.getContent();