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如果我嘗試使用Firebase令牌向設備發送消息並且設備沒有互聯網連接,會生成什麼響應?特別是我想知道是否會生成任何「錯誤」消息?離線設備的Firebase響應
看看下面的代碼
while(rs.next())
{
URL url = new URL(API_URL_FCM);
HttpURLConnection conn;
conn = (HttpURLConnection) url.openConnection();
conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Authorization","key="+AUTH_KEY_FCM);
conn.setRequestProperty("Content-Type","application/json");
JSONObject infoJson = new JSONObject();
infoJson.put("title","Vehicle Alert");
String alert=request.getParameter("alert");
infoJson.put("body", alert);
String token;
OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
token=rs.getString(1);
JSONObject json = new JSONObject();
json.put("to",token.trim());
json.put("data", infoJson);
wr.write(json.toString());
out.println("<br>Message sent from server to firebase for Token : "+token+"</br>");
wr.flush();
int status = 0;
if(null != conn){
status = conn.getResponseCode();
}
if(status != 0){
if(status == 200)
{//SUCCESS message
BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
Boolean res=br.readLine().contains("error");
if(res) //Remove Invalid Token(s)
{
Statement st=con.createStatement();
query="DELETE from Token WHERE token='"+token+"'";
st.executeUpdate(query);
out.println("<br>Unvalid Token removed from Database</br>");
}
}
else if(status == 401)
{
//client side error
我不想被刪除從我的數據庫令牌只是因爲設備處於脫機狀態。當且僅當該令牌不再有效時才應刪除該令牌。 有什麼建議嗎?
Yess ....!該文件說同樣的事情。感謝您的建議! –