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HTTP Response 414

I'm sending a POST Request using Java HttpURLConnection. I got 414 Response using the Approach 1

Approach 1 :

urlString = urlString + "?" + getParameters(params);


In Approach 1, I append the parameters to the URL. The parameter is very long and hence I got 414 Response Code.

So I tried the below approach.

Approach 2 :

In this approach I sent the parameters as form data. Now, the server does not receive the complete data or does not receive the data at all.

URL url = new URL(urlString);
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setUseCaches(false);
connection.setAllowUserInteraction(true);
connection.setRequestProperty("Content-Type","multipart/form-data;boundary=" + boundary);

if(headers != null) {
Enumeration<String> enums = (Enumeration<String>)headers.propertyNames();
while(enums.hasMoreElements()) {
String key = enums.nextElement();
String val = headers.getProperty(key);

connection.setRequestProperty(key, val);
}
}

writer = new PrintWriter(new OutputStreamWriter(connection.getOutputStream(), "UTF-8"));
if(params != null) {
Iterator it = params.keys();
while(it.hasNext()) {
String name = (String)it.next();
String value = (String)params.get(name);
value = URLDecoder.decode(value);
System.out.println(" Param Name :: " + name + " - Value :: " + value);

writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name="" + name + """).append(LINE_FEED);
writer.append("Content-Type: text/plain; charset=UTF-8").append(LINE_FEED);
writer.append(LINE_FEED);
writer.append(value).append(LINE_FEED);
writer.flush();
}
}

if(fileDetails != null) {
File dataFile = (File)fileDetails.get("FILE");
String fileName = fileDetails.optString("FILE_NAME","");

writer.append("--" + boundary).append(LINE_FEED);
writer.append("Content-Disposition: form-data; name="" + "FILE" + "";filename="" + fileName + """).append(LINE_FEED);
writer.append("Content-Type: " + URLConnection.guessContentTypeFromName(dataFile.getName()));
writer.append("Content-Transfer-Encoding: binary").append(LINE_FEED);
writer.append(LINE_FEED);
writer.flush();

fis = new FileInputStream(dataFile);
byte buffer = new byte[4096];
int bytesRead = -1;
while((bytesRead = fis.read(buffer)) != -1) {
connection.getOutputStream().write(buffer, 0, bytesRead);
}
fis.close();

writer.append(LINE_FEED); writer.flush();
}
writer.append(LINE_FEED); writer.flush();
writer.append("--" + boundary + "--").append(LINE_FEED); writer.close();


How do I send large data in POST using Java ? I'm not going to send Files, just JSONObject as a String in the parameter value.

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