Access to xmlhttrequest been blocked by CORS policy: no 'access-control-allow-origin' header is present on the requested resource.

Question

0.00/5 (No votes)

See more:

I cant seem to resolve this issue, i am using Chrome. The idea i want to download CVS file using Ajax call request.

What I have tried:

$(document).ready(function() {
    $("#download").click(function() {
      $.ajax({
        url:'https://www.thingspeak.com/channels/899906/feeds.json?api_key=F**&results=3',
        type:'GET',
        dataType:'json',
        success:function(response){
          window.location = response;
        }
      });

    });

  });

I am trying to follow this link, the idea is for me to download from my button date range for the field. On VS code i can able to do this without no problem including using the URL itself, MY CVS file does come right. Read data from all fields in a channel with HTTP GET - MATLAB- MathWorks Benelux[^]

Posted 10-Nov-19 22:21pm

gcogco10

Updated 10-Nov-19 23:51pm

Add a Solution

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

F-ES Sitecore · Answer 1 · 2019-11-10T23:12:00

The site you are accessing has to allow pages outside of its domain from accessing it via ajax. It does this by sending headers back that say what you are doing is allowed. If the target site is not doing this then you can't script access to it. This is what CORS is for, to explicitly stop people doing what you are doing.

To preempt your next question, if there was a way to get around this it wouldn't be a very good security feature. You'll need to see if there is an appropriate API the target site supplies that you are able to use.

gcogco10 · Answer 2 · 2019-11-10T23:52:00

Hi Team

I have managed to work around to this problem though, here is my solution i was looking for all along.

$(document).ready(function() {
         $("#download").click(function() {
         $.ajax({
           url:'https://api.thingspeak.com/channels/899906/feeds.csv?start=2019-11-08%2019:10:08&end=2019-11-11%2019:11:11',
           crossDomain:true,
           type:'GET',
           data:{
             format:'csv',
           },
           success:function(response){
             window.location.href ='https://api.thingspeak.com/channels/899906/feeds.csv?start=2019-11-08%2019:10:08&end=2019-11-11%2019:11:11' ;
           },
           error:function() {
             $().text("There was an error processing your request.Please try again");
             }
         });
         });

       });

The issue were 2 things, i remove URL https://www-api.thingspeakcom/......???
Second one, was my window.responce location to receive the response back as any file format on my data. Thanks all

Access to xmlhttrequest been blocked by CORS policy: no 'access-control-allow-origin' header is present on the requested resource.

2 solutions

Solution 1

Solution 2

Add your solution here

Preview 0