I am trying to connect to firebase to send push notification to an android app.
I have written following code in Java Server side. But I am getting connection timed out exception always.
final String apiKey="AAAAeEpqP-w:APA91bFulyT23Km-onTNr_q5yEz4uoOaM8KdE4LMyIoz6kWlk3pJSHirDJBSiqESRXKiGa-Z_tBfpXA6naaaTXxcFFxAnaSkMTPVVOMswyJ0bhhdpwlo-92HXgxRMsHV6Y8bNaHX7tMd";
int i=0;
try {
URL url = new URL("https://fcm.googleapis.com/fcm/send");
HttpsURLConnection conn = (HttpsURLConnection ) url.openConnection();
System.out.println("after connection open");
//conn.setDoInput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
conn.setRequestProperty("Authorization", "key=" + apiKey);
conn.setDoOutput(true);
JSONObject json = new JSONObject();
json.put("to", "device-token");
JSONObject info = new JSONObject();
info.put("title", "notification title"); // Notification title
info.put("body", "message body");
json.put("notification", info);
OutputStreamWriter wr = new OutputStreamWriter(
conn.getOutputStream());
wr.write(json.toString());
wr.flush();
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
// result = CommonConstants.SUCCESS;
System.out.println("after closed out put stream");
int responseCode = conn.getResponseCode();
// System.out.println("Post parameters : " + input);
System.out.println("Response Code : " + responseCode);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch(Exception e){
e.printStackTrace();
}
}
It always shows session timeout error.
Is it a correct way to send notifications to app.
Any help is appreciated.
EDIT :- I have called the same url with device token and other things from rest client and it works well.I got a notification in my app.But when i send it thru Java code at that time it shows connection timed out.
Here's the official Firebase documentation which can help you set up the server. https://firebase.google.com/docs/cloud-messaging/server
In your code I noticed json.put("to", "device-token"); and I am assuming that you are using it as a placeholder only for the example. If not, in your request you need to send a device-token like { "to" : "bk3RNwTe3H0:CI2k_HHwgIpoDKCIZvvDMExUdFQ3P1..." } .
Related
I got a situation to test the REST API's Delete call through Java code. I need to pass Form Data with 2 variables as below screenshot to the api request. someone please route me how to do that..
try {
URL url = new URL("http://localhost:8999/testsource");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("DELETE");
conn.setRequestProperty("Accept", "*/*");
conn.setRequestProperty("session", "Cii2vEBZDplu5fI9JNXiM5");
if (conn.getResponseCode() != 200) {
throw new RuntimeException("Failed : HTTP error code : " + conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader((conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (Exception e) {
e.printStackTrace();
}
Your question isn't very clear but I'll make an attempt to answer it based on the assumption that your form data contains two fields which are:
id
permanentDelete
String data = "id=the-id-goes-here&permanentDelete=yes-or-no-goes-here";
byte[] bytesToSend = data.getBytes(StandardCharsets.UTF_8);
OutputStream outputStream = conn.getOutputStream();
outputStream.write(bytesToSend);
I have code a java script to consume API response. But I am getting a bad request whenever I am trying to run it.
Kindly help me how to consume API through java.
Here I am trying to generate JWT token....
Please find the code below..
public static void main(String[] args) throws Exception {
URL url = new URL("URL");
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("POST");
connection.setDoInput(true);
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
connection.connect();
try {
String jsonData1 = "{\"grant_type\":\"aksa\"}";
String jsonData2 = "{\"username\":\"dkssdsk\"}";
String jsonData3 = "{\"password\":\"xE2w04kC1a7S\"}";
String jsonData4 = "{\"scope\":\"mksssl,/\"}";
DataOutputStream output = new DataOutputStream(connection.getOutputStream());
output.write(jsonData1.getBytes());
output.write(jsonData2.getBytes());
output.write(jsonData3.getBytes());
output.write(jsonData4.getBytes());``
output.flush();
System.out.println(output);
// Read the response:
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));`enter code here`
String line;
while ((line = reader.readLine()) != null) {
System.out.println(line);
}
reader.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
System.out.println("Response code:" + connection.getResponseCode());
System.out.println("Response message:" + connection.getResponseMessage());
}
}
Your code writes:
{"grant_type":"aksa"}
{"username":"dkssdsk"}
{"password":"xE2w04kC1a7S"}
{"scope":"mksssl,/"}
This is not valid JSON. There are many JSON validators (including web pages you can copy/paste into) you could use to show this.
Test your service using a tool such as Postman. Once you have it working, ensure that your program writes the same content as the body configured in Postman.
I am trying to get data from an MySQL database using a php-file. My java code is as follows:
HttpURLConnection conn = null;
URL url = null;
try {
url = new URL(getURL);
System.out.println(getURL);
conn = (HttpURLConnection)url.openConnection();
//conn.setReadTimeout(READ_TIMEOUT);
//conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
// setDoInput and setDoOutput method depict handling of both send and receive
conn.setDoInput(true);
conn.setDoOutput(true);
// Append parameters to URL
Uri.Builder builder = new Uri.Builder();
builder.appendQueryParameter("user", USER);
builder.appendQueryParameter("pass", PASS);
builder.appendQueryParameter("server", SERVER);
builder.appendQueryParameter("db", DB);
String query = builder.build().getEncodedQuery();
// Open connection for sending data
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();
conn.connect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
result = reader.readLine();
return(result);
}else{
return("unsuccessful");
}
When I go to my url (hidden in the variable getURL) using a browser, I see string of json on my screen, just as it should. However, when I output the contents of the reader (above code only takes the first line, but by adapting the code I can, of course, output more) it shows the html-code for a website displaying a 404 - Page does not exist message.
Anyone has any idea what goes wrong? Yes, I did check for typo's.
Okay, I have no clue what happened, as I didn't change anything. But all of the sudden it started working?!?
Must have been something server-side I guess...
Thanks for the input and sharing your thoughts!
I´m trying to send a post request with cookies. This is the code:
try {
String query = URLEncoder.encode("key", "UTF-8") + "=" + URLEncoder.encode("value", "UTF-8");
String cookies = "session_cookie=value";
URL url = new URL("https://myweb");
HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
conn.setRequestProperty("Cookie", cookies);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
DataOutputStream out = new DataOutputStream(conn.getOutputStream());
out.writeBytes(query);
out.flush();
out.close();
BufferedReader in = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String decodedString;
while ((decodedString = in.readLine()) != null) {
System.out.println(decodedString);
}
in.close();
// Send the request to the server
//conn.connect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
The problem is the request is sent without the cookies. If I only make:
conn.connect(); and don´t send data, the cookies are sent OK.
I can´t check exactly what is happening, because the connection is thorugh SSL. I only check the response.
According to the URLConnection javadoc:
The following methods are used to access the header fields and the
contents AFTER the connection is made to the remote object:
* getContent
* getHeaderField
* getInputStream
* getOutputStream
Have you confirmed that in your test case above the request is getting to the server at all? I see you have the call to connect() after getOutputStream() and commented-out besides. What happens if you uncomment it and move up before the call to getOutputStream() ?
I want to send some information from PHP to Java. Why? Because I have a database on my server, and I get information from my database using PHP scripts.
Now I want to send that information to my client in Java. How can I do that?
I send information from Java to PHP by POST, and it works well, but I don't know how can I do the reverse.
Can you help me?
I saw this code, from a GET connection in Java... is it correct?
public String HttpClientTutorial(){
String url = "http://testes.neoscopio.com/myrepo/send.php";
InputStream content = null;
try {
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = httpclient.execute(new HttpGet(url));
content = response.getEntity().getContent();
} catch (Exception e) {
Log.e("[GET REQUEST]", "Network exception", e);
}
String response = content.toString();
return response;
}
P.S: I'm an android developer, not a Java developer...
From exampledepot: Sending POST request (Modified to get the output of your send.php.)
try {
// Construct data
String data = URLEncoder.encode("key1", "UTF-8") + "=" + URLEncoder.encode("value1", "UTF-8");
data += "&" + URLEncoder.encode("key2", "UTF-8") + "=" + URLEncoder.encode("value2", "UTF-8");
// Send data
URL url = new URL("http://testes.neoscopio.com/myrepo/send.php");
URLConnection conn = url.openConnection();
conn.setDoOutput(true);
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
wr.write(data);
wr.flush();
// Get the response
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
// Process line...
}
wr.close();
rd.close();
} catch (Exception e) {
}
P.S. This should work fine on Android. :)
(I usually import static java.net.URLEncoder.encode but that's a matter of taste.)