c# - Web requests suddenly not working -

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my app makes calls api so:

debug.writeline ("making api request: " + action); var request = httpwebrequest.create("http://domain.com/api/"+ action"); request.contenttype = "application/json"; request.method = "get"; string content = "d";  using (httpwebresponse response = request.getresponse() httpwebresponse) {     using (streamreader reader = new streamreader(response.getresponsestream()))     {         content = reader.readtoend();     } }  return content;

and has been working few months. 1 day app no longer working. debugging i'm finding requests either timing out or throwing error:

 (system.net.webexception) error getting response stream (readdone1): receivefailure

what error mean? , why did start? code hasn't been changed since release of app. request works when typed browser.

adding www. urls fixed issue.


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