I have a simple Java servlet running on Tomcat at http://localhost:8081/myApp
I am trying to send a HTTP POST request to this from a test harness in a main method.
Currently I am printing out the method and headers on the servlet. What's weird is that even though I set the connection method to POST, on the servlet it's GET. Also, other headers are missing or not what I set them too.
However, if I use https://postman-echo.com/post as the URL instead of http://localhost:8081/myApp it works as expected. That is, I get a response code of 200 and an echo back of my json body.
What's being printed out on my servlet:
Method: GET
Header Name: user-agent Value: Java/1.8.0_191
Header Name: host Value: localhost:8081
Header Name: accept, Value: text/html, image/gif, image/jpeg, *; q=.2, /; q=.2
Header Name: connection Value: keep-alive
There has to be something I am missing here.
public static void main(String[] args) {
//String ENDPOINT_URL = "http://localhost:8081/myApp";
String ENDPOINT_URL = "https://postman-echo.com/post";
String json = "{\"foo\":\"bar\"}";
System.out.println(json);
//open connection
try {
URL url = new URL(ENDPOINT_URL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("POST"); //set to POST method
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setAllowUserInteraction(false);
conn.setRequestProperty ("Content-type", "application/json"); //json
conn.setRequestProperty("Accept", "application/json");
//send the request
BufferedWriter reqWriter = new BufferedWriter(new OutputStreamWriter(conn.getOutputStream()));
reqWriter.write(json);
reqWriter.close();
int responseCode = conn.getResponseCode();
System.out.println(responseCode);
InputStream response = conn.getInputStream();
BufferedReader in =
new BufferedReader (new InputStreamReader (response));
String line;
while ((line = in.readLine()) != null) {
System.out.println(line);
}
in.close();
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
