push notification 전송을 위해 firebase cloud console api를 호출 하는 방법 중

자바 서버에서 호출 하는 방법입니다.

1. function sendPost() 작성

public String sendPost(String url, String parameters) throws Exception { 
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager(){
                public X509Certificate[] getAcceptedIssuers(){return new X509Certificate[0];}
                public void checkClientTrusted(X509Certificate[] certs, String authType){}
                public void checkServerTrusted(X509Certificate[] certs, String authType){}
        }};
        SSLContext sc = SSLContext.getInstance("TLS");
        sc.init(null, trustAllCerts, new SecureRandom());
        HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
   
       URL obj = new URL(url);
       HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
   
       //reuqest header
       con.setRequestMethod("POST");
       con.setRequestProperty("Content-Type", "application/json");
       con.setRequestProperty("Authorization", "key=Firebase API KEY");
       String urlParameters = parameters;
   
       //post request
       con.setDoOutput(true);
       DataOutputStream wr = new DataOutputStream(con.getOutputStream());
       wr.write(urlParameters.getBytes("UTF-8"));
       wr.flush();
       wr.close();

       int responseCode = con.getResponseCode();     
       System.out.println("Post parameters : " + urlParameters);
       System.out.println("Response Code : " + responseCode);
   
       StringBuffer response = new StringBuffer();
   
       if(responseCode == 200){   
              BufferedReader in = new BufferedReader( new InputStreamReader(con.getInputStream()));
              String inputLine;
              while ((inputLine = in.readLine()) != null) {
                     response.append(inputLine);
              }
              in.close();   
       }
       //result
       System.out.println(response.toString());
       return response.toString();
}

2. 사용방법

String url = "https://fcm.googleapis.com/fcm/send"; 
 
String parameters = "{"+
                "\"data\": {"+
                        "\"message\": {" +
                                "\"title\": \"test\","+
                                "\"content\": \"test content\","+
                                "\"imgUrl\": \"\","+
                                "\"link\": \"\","+
                         "}"+ 
                "},"+
                "\"to\": "\"/topics/noticeMsg\""+    
             "}"; 
String result = sendPost(url,parameters);

 ->  "{\"data\" : {\"message\" : {\"title\":\"test\",\"content\":\"test content\",\"imgUrl\":\"\",\"link\":\"\"}},\"to\" : \"/topics/noticeMsg\"}";