What is the best way to confirm the success of my post method using XMLHttpRequest?

Question

What is the best way to confirm the success of my post method using XMLHttpRequest?

I have limited experience with API's and recently wrote a function to send data to an API. I have bound this function to a textbox text change event, but I am unsure if it is working since I am not receiving any errors. Below is the code for the function:

function sendAPIData(url,introduction,coordinateid){
    var xhttp = new XMLHttpRequest();
    xhttp.open("POST", "http://192.168.51.212:3368/casigo/sDAGinput",true);
    xhttp.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
    var input = JSON.stringify({
      "coordinate": coordinateid,
      "url": url,
      "introduction": introduction
    });
    xhttp.send(input);
}

I expect this function to provide me with some input string.

javascript json api http

Answer 1

Answer №1

One way to verify the server's response is by implementing a callback function:

function sendAPIRequest(url,intro,coordID) {
    var request = new XMLHttpRequest();
    request.open("POST", "http://192.168.51.212:3368/casigo/sDAGinput",true);
    request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
    var data = JSON.stringify({
      "coordinate": coordID,
      "url": url,
      "introduction": intro
    });

    // defining the callback function
    request.onload = function(response) {
      if (request.readyState === 4) {
        if (request.status === 200) {
          console.log("Server responded with success");
        } else {
          console.error("Error in server response");
        }
      }
    };

    request.send(data);
}

The request.onload function executes once the server responds to the XMLHttpRequest. The variable response holds the server's reply.

Answer 2

One way to verify the server's response is by implementing a callback function:

function sendAPIRequest(url,intro,coordID) {
    var request = new XMLHttpRequest();
    request.open("POST", "http://192.168.51.212:3368/casigo/sDAGinput",true);
    request.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
    var data = JSON.stringify({
      "coordinate": coordID,
      "url": url,
      "introduction": intro
    });

    // defining the callback function
    request.onload = function(response) {
      if (request.readyState === 4) {
        if (request.status === 200) {
          console.log("Server responded with success");
        } else {
          console.error("Error in server response");
        }
      }
    };

    request.send(data);
}

The request.onload function executes once the server responds to the XMLHttpRequest. The variable response holds the server's reply.

Answer 3

Answer №2

When working with the XMLHttpRequest object, developers can access the status and readyState properties to handle responses from the server using the onreadystatechange event. A code snippet like the one below demonstrates how this can be done.

xhttp.onreadystatechange=function(){
   //readyState == 4 means the request is done and a response is received from the server

   if (xhttp.readyState==4 && xhttp.status==200 && typeof(xhttp.responseText) == 'string'){
      //Do something          
   }
}

Answer 4

When working with the XMLHttpRequest object, developers can access the status and readyState properties to handle responses from the server using the onreadystatechange event. A code snippet like the one below demonstrates how this can be done.

xhttp.onreadystatechange=function(){
   //readyState == 4 means the request is done and a response is received from the server

   if (xhttp.readyState==4 && xhttp.status==200 && typeof(xhttp.responseText) == 'string'){
      //Do something          
   }
}

What is the best way to confirm the success of my post method using XMLHttpRequest?

Answer №1

Answer №2

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