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I have a multiple file uploader but while it's uploading sometimes 1 out of 10 files doesn't make it and it returns a Failed to load resource: net::ERR_CONNECTION_RESET in chrome console. I tried to catch it with the try-catch, but it acts as if no error occurred. What am I doing wrong?

var ajax = new XMLHttpRequest();
ajax.open("POST", "/multiFileUploadHandler.php");
try {
    ajax.send(formdata);
} catch (err) {
    alert('Error: '+err);
}

I have a multiple file uploader but while it's uploading sometimes 1 out of 10 files doesn't make it and it returns a Failed to load resource: net::ERR_CONNECTION_RESET in chrome console. I tried to catch it with the try-catch, but it acts as if no error occurred. What am I doing wrong?

var ajax = new XMLHttpRequest();
ajax.open("POST", "/multiFileUploadHandler.php");
try {
    ajax.send(formdata);
} catch (err) {
    alert('Error: '+err);
}
  • javascript
  • xmlhttprequest
  • try-catch
Share Improve this question asked Mar 5, 2014 at 10:35 Matthew AbrmanMatthew Abrman 73110 silver badges18 bronze badges 1
  • usually this error happens when the server's transport detected a error condition and thus it does reset your TCP/IP connection ! :) – Mehdi Maghrouni Commented Mar 26, 2014 at 16:43
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1 Answer 1

Reset to default 6

This is likely because it is async. Try catching this with an onerror event handler.

ajax.onerror = function(error) {
    // handle error
};

edit: corrected syntax.

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