There is no encoding happening because what you have there is already a valid, completely encoded URI.

If you want to use that as a parameter in an other URI, you should useencodeURIComponent:

document.location.href = 'display.jsp?img='+encodeURIComponent(uri);

It is not correct to useencodeURI() as this function encodes special character except:, / ? : @ & = + $ #

UseencodeURIComponent() to encode these characters.

For more info check below link:

http://www.w3schools.com/jsref/jsref_encodeuri.asp

Your problem is that theencodeURI function is for making a URL valid for a browser, not for formatting content into a URL (which is what you're doing). A base64 string is already formatted in such a way that it registers as valid. To encode it as part of the URL, you need to useencodeURLComponent.

Basically, just use:

var uri ="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQo...";var res = encodeURIComponent(uri);document.location.href = 'display.jsp?img='+res;

For more info, check out:When are you supposed to use escape instead of encodeURI / encodeURIComponent?

• javascript