Http 405: The specified HTTP method is not allowed for the requested resource (Request method 'POST'

[chandeep arora]

I have a Rest Web service used to add items in database.. The architecture goes like this:

Request generated from UI with the items in json format to add items in DB --> Controller: converts json to xml for rest web service --> Rest web service: takes the xml and extracts data and adds into db.

Now.. the request generated from UI is a get request to controller so to pass data to controller.

UI Simulator Code:

    @RequestMapping(value = "/add", method = RequestMethod.GET)
           @ResponseBody
           public void updateAddResource() throws IOException
           {
                  String url = "http://localhost:8089/PMT/people/resource/add";
                  System.out.println(url);
                
                  URL obj = new URL(url);
                  HttpURLConnection con = (HttpURLConnection) obj.openConnection();
                  String USER_AGENT="Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
                  //add reuqest header
                  con.setRequestMethod("POST");
                  con.setRequestProperty("User-Agent", USER_AGENT);
                  con.setRequestProperty("Content-type","application/json");
                  con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");
    
                  String urlParameters = "{\"data\":{\"peopleList\":["+
                                                                 "{\"employeeId\":\"8003832\",\"name\":\"rose\",\"emailId\":\"[e-mail]\",\"contact\":\"9988106724\",\"designation\":\"software engineer\"},"+
                                                                 "{\"employeeId\":\"8003834\",\"name\":\"ritesh\",\"emailId\":\"[e-mail]\",\"contact\":\"99883106724\",\"designation\":\"software e3ngineer\"}]}}";
    
                  // Send post request
                  con.setDoOutput(true);
                  DataOutputStream wr = new DataOutputStream(con.getOutputStream());
                  wr.writeBytes(urlParameters);
                  wr.flush();
                  wr.close();
    
                  int responseCode = con.getResponseCode();
                  System.out.println("\nSending 'POST' request to URL : " + url);
                  System.out.println("Post parameters : " + urlParameters);
                  System.out.println("Response Code : " + responseCode);
    
                  BufferedReader in = new BufferedReader(
                          new InputStreamReader(con.getInputStream()));
                  String inputLine;
                  StringBuffer response = new StringBuffer();
    
                  while ((inputLine = in.readLine()) != null) {
                         response.append(inputLine);
                  }
                  in.close();
    
                  //print result
                  System.out.println(response.toString());
           }

CONTROLLER:

 @RequestMapping(value = "/resource/add", method = RequestMethod.POST)
           @ResponseBody
           public String addResource(@RequestBody String json)
           {
                
                  String addResult="";
                  String errorMsg="FAILED";
                  try{
                         System.out.println(json);
                         Gson gson = new Gson();
                         RequestVO object = gson.fromJson(json, RequestVO.class);
                         System.out.println(object);
                         
                         XStream xstream = new XStream();
                         xstream.autodetectAnnotations(true);
                         String requestXml = xstream.toXML(object);
                         System.out.println(requestXml);
                         
                         String url = "http://ipAddress:8087/PMT/service/resource/add;
                         log.info("Accessing addresource webservice url: '"+url+"' in addResource(@RequestBody String json) of com.jpmc.pmt.controller.TestController");        
                         String USER_AGENT="Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/29.0.1547.66 Safari/537.36";
                         HttpClient client = new DefaultHttpClient();
                         HttpPost post = new HttpPost(url);
                         post.addHeader("User-Agent", USER_AGENT);
                         post.addHeader("Content-Type", "text/xml");
                         post.setHeader("User-Agent", USER_AGENT);
                         post.setHeader("Content-Type", "text/xml");
                         StringEntity entity = new StringEntity(requestXml, "text/xml",HTTP.DEFAULT_CONTENT_CHARSET);
                         post.setEntity(entity);           
                         HttpResponse response = client.execute(post);
                         System.out.println("Response Code : " + response.getStatusLine().getStatusCode());
                  
                         BufferedReader br = new BufferedReader(new InputStreamReader((response.getEntity().getContent()))); 
                         String output;
                         System.out.println("Output from Server .... \n");
                         while ((output = br.readLine()) != null) {
                               addResult+=output;
                         }      
                         log.info("Exiting addResource(@RequestBody String json) of com.jpmc.pmt.controller.TestController");
                         return addResult;
                  }catch (Exception e) { 
                         log.info("Exception: "+e.getMessage()+" caught in addResource(@RequestBody String json) of com.jpmc.pmt.controller.TestController");
                         e.printStackTrace();
                         return errorMsg;
                  } 
           }

WEB SERVICE:

  @RequestMapping(method=RequestMethod.POST, value="/resource/add",headers = {"content-type=application/xml","Access-Control-Allow-Methods=POST, GET, PUT, UPDATE, OPTIONS"})
    	public @ResponseBody String addResource(@RequestBody String body) {
    		System.out.println("POST");
    		System.out.println("The Request Body is "+body);
    //TO ADD INTO DB
    }

NOW i am getting the error:

  Request method 'POST' not supported. The specified HTTP method is not allowed for the requested resource (Request method 'POST' not supported).

[Vijitha Kumara]

First of all why do you need a controller to convert JSON -> XML as the backend accepts XML anyway?