在http請求中發送的數據與持續時間

Question

嗨，這是我使用http請求發送數據到服務器的js代碼。代碼工作正常，我可以獲取數據，但我希望每10分鐘自動發送一次數據，一旦我呼叫此功能。可以任何一個幫助我。提前預感

xmlHttp=new XMLHttpRequest(); 
var url="http://localhost"; 
xmlHttp.open("POST",url,true); 
var params = "lorem=ipsum&name=binny"; 
function timerMethod() 
{ 
xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
xmlHttp.setRequestHeader("Content-length", params.length); 
xmlHttp.send(params); 
} 

Answer 1

有點難以確切地告訴你想從問題中得到什麼，但是你在尋找類似的東西嗎？

// Declare variables 
var timedUpdate, getRequestParams, url, updateTimeout; 

// Define timedUpdate function 
timedUpdate = function() { 

    // Declare variables 
    var xmlHttp, params; 

    // Create a new AJAX object 
    xmlHttp = new XMLHttpRequest(); 

    // Define a call back function 
    xmlHttp.onreadystatechange = function() { 

     if (xmlHttp.readyState < 4) { 
      return; // Only do something if the request if complete 
     } 

     if (xmlHttp.responseCode != 200) { 
      // Handle HTTP errors here 
      // e.g. 
      alert('Something went wrong with the AJAX request (HTTP '+xmlHttp.responseCode+')'); 
     } 

     // Do your thing with the returned data 

     // Set the function to run again after updateTimeout seconds 
     setTimeout(timedUpdate, updateTimeout * 1000); 
    }; 

    // Get the request parameters 
    params = getRequestParams(); 

    // Send the request 
    xmlHttp.open("POST", url, true); 
    xmlHttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded"); 
    xmlHttp.setRequestHeader("Content-length", params.length); 
    xmlHttp.send(params); 

}; 

// Define getRequestParams function 
getRequestParams = function() { 
    // This function returns a parameter string to be used in the request 
    // I am guessing you need to generate a new one every 10 minutes 
    return "lorem=ipsum&name=binny"; 
}; 

// Define the URL to be used in the requests 
url = "http://localhost/"; 

// Define how often the function is repeated, in seconds 
updateTimeout = 600; // 10 minutes 

// Make the first call to the function 
timedUpdate();