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How to receive JSON Data from server and display at the Client Side?

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How to receive JSON Data from server and display at the Client Side?
posted Jul 18, 2017 by Ram Jana

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1 Answer

0 votes

• JSON data is received as a string
• Calling eval() will generate JSON object in JavaScript code
var JSONdata = eval(req.responseText);
• Once you have JSON object, you can use . notation to access its properties
var name = JSONdata.name;
var address = JSONdata.addresses[3];
var streetname = JSONdata.addresses[3].street;

answer Jul 18, 2017 by Sumana
Similar Questions
+1 vote

Please help me with following -
1. Write a java program to get json data from URL http://echo.jsontest.com/Operand1/10/Operand2/5/Operator/+
2. Perform mathematical operation in java after reading JSON from above URL and print result.for ex.result=10+5=15
3. Result should be dynamic and should change if change values in above URL.

0 votes

i want to sent a response for my form submit from server to client, that means python flask to javascript. My javascript code is given follows

document.addEventListener('DOMContentLoaded', function() {

chrome.tabs.getSelected(null, function(tab) {
  d = document;
  var f = d.createElement('form');
  f.action = 'http://127.0.0.1:5000/Get%20Form/';
  f.method = 'post';
  var i = d.createElement('input');
  i.type = 'hidden';
  i.name = 'url';
  i.value = tab.url;
  f.appendChild(i);
  d.body.appendChild(f);
  f.submit();   
});
$(".button").click(function(){
    request = new XMLHttpRequest();
    request.open("POST","http://127.0.0.1:5000/PutValue/",true);
    request.send();
    request.addEventListener("readystatechange", processRequest,false);
    function processRequest(e)
    {
    if(request.readyState==4 && request.status == 200)
    {
    var response = JSON.parse(request.responseText);
    a=response.result
    alert(a);
    }
    }
});
},false);

And my Python server code is follows

from flask import Flask, flash, redirect, url_for, request, render_template,jsonify
import json
import UrlTest
import trainingSet as ts

app = Flask(__name__)
user=""
s=0

@app.route('/Get Form/',methods = ['POST'])
def GetForm():
request.method == 'POST'
url=request.form['url']
UrlTest.process_test_url(url,'test_features.csv')
s=ts.main_caller('url_features.csv','test_features.csv')
print s
return str(s)

@app.route('/PutValue/',methods = ['POST'])
def PutValue():
request.method == 'POST'
print s
return jsonify(result=s)


if (__name__ == '__main__'):
app.run(debug=True,host='0.0.0.0', use_reloader=False)

I want to send the value of s to the javascript client. please help me to send this the value of s.
and if u can suggest the complete code in javascipt and python

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