Form POST being sent with no parameters
Question
I have a very simple HTML page:
<html>
<head>
<script>
function post() {
var form = document.createElement("form");
form.setAttribute("method", "post");
form.setAttribute("action", "/agree");
var hiddenField = document.createElement("input");
hiddenField.setAttribute("type", "hidden");
hiddenField.setAttribute("name", "location");
hiddenField.setAttribute("value", "URL goes here");
document.body.appendChild(form);
form.submit();
}
</script>
</head>
<body>
<input type="button" value="I agree" onclick="post()">
</body>
For whatever reason, both in the Firefox network inspector and in the HTTPServlet code handling the post, there are no parameters, eg in the network inspector it says "No parameters for this request", and in Java using getParameter or getParameterNames both return null.
I have tried changing the form of the JS a little bit, to see another format I often see being used for adding attributes. For example:
hiddenField.type = "hidden";
But this changes nothing (what's the difference anyway?). What am I doing wrong?
1 answers
solution1
5 ACCPTED 2014-06-30 14:36:39
You forgot to append the hiddenField to the form:
form.appendChild(hiddenField);
Small side note: there is missing a double quote here (before /agree ):
form.setAttribute("action", "/agree");
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