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Trouble on checking of image existing on remote server in Chrome browser by using XMLHttpRequest

Checking if a key exists in a JavaScript object?XmlHttpRequest error: Origin null is not allowed by Access-Control-Allow-OriginCheck if element exists in jQueryJavaScript check if variable exists (is defined/initialized)AngularJS performs an OPTIONS HTTP request for a cross-origin resourceWhy does my JavaScript code get a “No 'Access-Control-Allow-Origin' header is present on the requested resource” error when Postman does not?Font from origin has been blocked from loading by Cross-Origin Resource Sharing policyXMLHttpRequest cannot load XXX No 'Access-Control-Allow-Origin' headerResponse to preflight request doesn't pass access control checkNo 'Access-Control-Allow-Origin' header is present on the requested resource—when trying to get data from a REST API

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

-1

I use this JQuery method on page to check if image exists:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();
 http.open('HEAD', imageUrl, false);
 http.send();
 return http.status !== 404;
 

If I load the page in browser, it works great, but if I go to the next page and then go back to this page the script does not work correctly. There is error in browser console:

Access to XMLHttpRequest at 'https://server/image.jpg' from origin 'http://client' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

This error occurs only when I back from another site page to this page in Chrome browser. There is no error in Firefox and Edge browsers

Thanks!!!

javascript jquery cors xmlhttprequest

share|improve this question

edited Mar 28 at 10:08

Hennadii Feshchuk

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That error should be there in either case, CORS does not depend on whether you navigate back and forth between your own pages, but solely on whether the remote host allows this kind of request, or not.
  
  – 04FS
  Mar 27 at 12:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know and CORS is enabled on Server with images. Maybe CORS policy is set not correctly on remote server. But why it works without errors on loading page?
  
  – Hennadii Feshchuk
  Mar 27 at 12:09
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Then the response should show the appropriate headers in the network panel; does it?
  
  – 04FS
  Mar 27 at 12:11
  
  

  
  
  
  

add a comment
 | 

-1

I use this JQuery method on page to check if image exists:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();
 http.open('HEAD', imageUrl, false);
 http.send();
 return http.status !== 404;
 

If I load the page in browser, it works great, but if I go to the next page and then go back to this page the script does not work correctly. There is error in browser console:

Access to XMLHttpRequest at 'https://server/image.jpg' from origin 'http://client' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

This error occurs only when I back from another site page to this page in Chrome browser. There is no error in Firefox and Edge browsers

Thanks!!!

javascript jquery cors xmlhttprequest

share|improve this question

edited Mar 28 at 10:08

Hennadii Feshchuk

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  That error should be there in either case, CORS does not depend on whether you navigate back and forth between your own pages, but solely on whether the remote host allows this kind of request, or not.
  
  – 04FS
  Mar 27 at 12:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I know and CORS is enabled on Server with images. Maybe CORS policy is set not correctly on remote server. But why it works without errors on loading page?
  
  – Hennadii Feshchuk
  Mar 27 at 12:09
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Then the response should show the appropriate headers in the network panel; does it?
  
  – 04FS
  Mar 27 at 12:11
  
  

  
  
  
  

add a comment
 | 

I use this JQuery method on page to check if image exists:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();
 http.open('HEAD', imageUrl, false);
 http.send();
 return http.status !== 404;
 

If I load the page in browser, it works great, but if I go to the next page and then go back to this page the script does not work correctly. There is error in browser console:

Access to XMLHttpRequest at 'https://server/image.jpg' from origin 'http://client' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

This error occurs only when I back from another site page to this page in Chrome browser. There is no error in Firefox and Edge browsers

Thanks!!!

javascript jquery cors xmlhttprequest

share|improve this question

edited Mar 28 at 10:08

Hennadii Feshchuk

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();
 http.open('HEAD', imageUrl, false);
 http.send();
 return http.status !== 404;
 

share|improve this question

edited Mar 28 at 10:08

Hennadii Feshchuk

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

share|improve this question

edited Mar 28 at 10:08

Hennadii Feshchuk

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

asked Mar 27 at 11:57

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

1 Answer
1

active

oldest

votes

0

This issue has been fixed by adding request header of 'Cache-Control' with 'no-cache' value:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();

 http.open('HEAD', imageUrl, false);
 http.setRequestHeader('Cache-Control', 'no-cache');
 http.send();

 return http.status !== 404;
 

share|improve this answer

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

add a comment
 | 

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0

This issue has been fixed by adding request header of 'Cache-Control' with 'no-cache' value:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();

 http.open('HEAD', imageUrl, false);
 http.setRequestHeader('Cache-Control', 'no-cache');
 http.send();

 return http.status !== 404;
 

share|improve this answer

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

add a comment
 | 

0

This issue has been fixed by adding request header of 'Cache-Control' with 'no-cache' value:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();

 http.open('HEAD', imageUrl, false);
 http.setRequestHeader('Cache-Control', 'no-cache');
 http.send();

 return http.status !== 404;
 

share|improve this answer

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

add a comment
 | 

This issue has been fixed by adding request header of 'Cache-Control' with 'no-cache' value:

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();

 http.open('HEAD', imageUrl, false);
 http.setRequestHeader('Cache-Control', 'no-cache');
 http.send();

 return http.status !== 404;
 

share|improve this answer

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

function imageExists(imageUrl) 
 var http = new XMLHttpRequest();

 http.open('HEAD', imageUrl, false);
 http.setRequestHeader('Cache-Control', 'no-cache');
 http.send();

 return http.status !== 404;
 

share|improve this answer

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges

answered Mar 28 at 10:06

Hennadii FeshchukHennadii Feshchuk

5999 bronze badges