The below code error's out with URIError: malformed URI sequence? when there is a % sign like 60% - Completed in the URL string from where I need to extract the parameter value e.g. %%20-%20Completed

   <SCRIPT type="text/javascript">
            function getParameterByName(name) {
                name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
                var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
                results = regex.exec(location.search);
                return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
            }
    </SCRIPT>

I dont have control of the server and need to process the output in my html page.

The below code error's out with URIError: malformed URI sequence? when there is a % sign like 60% - Completed in the URL string from where I need to extract the parameter value e.g. http://some-external-server./info?progress=60%%20-%20Completed

   <SCRIPT type="text/javascript">
            function getParameterByName(name) {
                name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");
                var regex = new RegExp("[\\?&]" + name + "=([^&#]*)"),
                results = regex.exec(location.search);
                return results == null ? "" : decodeURIComponent(results[1].replace(/\+/g, " "));
            }
    </SCRIPT>

I dont have control of the server and need to process the output in my html page.

• javascript
• jquery
• html
• escaping
• uri

Share Improve this question Follow asked Dec 20, 2013 at 9:33 StackedStacked 86122 gold badges1212 silver badges2424 bronze badges 2

• 1 possible duplicate of Javascript decodeURI(Component) malformed uri exception – Christian Commented Jan 14, 2014 at 22:35
• Possible duplicate of Why does decodeURIComponent('%') lock up my browser? – Michał Perłakowski Commented Dec 29, 2015 at 9:26

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1 Answer 1

Sorted by: Reset to default 7

I think you need to URI encode the percentage sign as '%25'

http://some-external-server./info?progress=60%25%20-%20Completed 

[EDIT]

I guess you could do something like this:

var str = "60%%20-%20pleted";
var uri_encoded = str.replace(/%([^\d].)/, "%25$1");
console.log(str); // "60%25%20-%20pleted"
var decoded = decodeURIComponent(uri_encoded);
console.log(decoded); // "60% - pleted"